CN100446454C - Method for transmitting data from RLC layer in radio communication system - Google Patents

Method for transmitting data from RLC layer in radio communication system Download PDF

Info

Publication number
CN100446454C
CN100446454C CNB2005100824905A CN200510082490A CN100446454C CN 100446454 C CN100446454 C CN 100446454C CN B2005100824905 A CNB2005100824905 A CN B2005100824905A CN 200510082490 A CN200510082490 A CN 200510082490A CN 100446454 C CN100446454 C CN 100446454C
Authority
CN
China
Prior art keywords
data unit
abandons
service data
information
sdu
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNB2005100824905A
Other languages
Chinese (zh)
Other versions
CN1716839A (en
Inventor
李承俊
吕运荣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of CN1716839A publication Critical patent/CN1716839A/en
Application granted granted Critical
Publication of CN100446454C publication Critical patent/CN100446454C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/321—Interlayer communication protocols or service data unit [SDU] definitions; Interfaces between layers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints
    • H04W28/14—Flow control between communication endpoints using intermediate storage

Abstract

The present invention discloses a method of transmitting data in wireless communication system. The method includes the following procedures: a service data unit SDU received from the upper layer is converted into a protocol data unit PDU; at least one service data unit SDU is discarded; the receive party is informed of part of the discarded information of at least one service data unit SDU; wherein, the part of the discarded information is the minimum information for the receive party to move the receive window.

Description

Send the method for data in the radio communications system from RLC layer
The application is that application number is 01141519.3 denomination of invention dividing an application for " being used for sending from RLC layer at radio communications system the method for data ".
Technical field
The present invention relates to a kind of being used for sends the method for data at a radio communications system from rlc layer, is specifically related to a kind of method that is used for carrying out at a radio communications system with rlc layer the SDU discard.
Background technology
Fig. 1 illustrates the system assumption diagram of a general radio communication system, and wherein the architecture of radio interface protocol meets the radio access network standard of European IMT-2000UMTS (Universal Mobile Telecommunications System).
Referring to Fig. 1, be the protocol layer of a data link of a control as radio link control (the being abbreviated as RLC afterwards) layer in radio communications system of the second layer of 3GPP.And rlc layer is corresponding to the second layer of OSI 7 layer models.All entities of rlc layer are embodied by radio resource control (being abbreviated as a RRC afterwards) layer as a upper strata.A radio interface protocol between a subscriber equipment and UTRAN (UMTS terrestrial radio access network) flatly comprises a physical layer, a data link layer and a network layer.Vertically, protocol architecture is divided into the control plane and a user plane that is used to send data message of be used to transmit control signal (signaling).
Especially, there is a rrc layer on the control plane in Fig. 1, as rlc layer of the second layer and a medium access control (being abbreviated as MAC afterwards) layer with as a physical layer of a ground floor as one the 3rd layer.And in user plane, RLC and MAC layer are present in the second layer, and physical layer is present in ground floor.Physical layer uses various radio transmitting technology to provide information transfer service as the upper strata, and is connected to the MAC layer that is positioned at the upper strata by transmission channel, and wherein the data between MAC and the physical layer are passed through transmission channel.Transmission channel is divided into one and monopolizes the dedicated transmission channel of use and one for subscriber equipment and be the public common transport channels of each subscriber equipment.
The MAC layer provides the reallocation service and the MAC parameter of radio resource.The change of the reallocation of this service request radio resource or MAC parameter.By a logic channel, the MAC layer is connected on the rlc layer, and provides various logical channels according to the kind of the information of transmission.Usually, when sending the information of control plane, use control channel, and Traffic Channel is used to send the information of user plane.
Rlc layer provides the foundation and the release of a radio link, and carries out and relevant segmentation and the cascade function of the RLC service data unit that gets off from the upper strata of user plane (being abbreviated as SDU later on).The size of RLC SDU is adjusted to the disposal ability that meets in the rlc layer, adds header information then on SDU so that form a protocol Data Unit (being abbreviated as PDU afterwards) and is sent to the MAC layer afterwards.In this case, being used to store the RLCSDU that gets off from the upper strata or the RLC buffer of RLC PDU is present among the rlc layer.
Rrc layer provides an information broadcast service that is used for to all subscriber equipment broadcast messages that are positioned at random areas.And rrc layer is responsible for being used for the control plane signal processing the 3rd layer control signal exchange, thereby has between subscriber equipment and UTRAN the function of setting up, keep and discharge a radio resource.Especially, rrc layer also has foundation, keep and discharge a radio access aggregate channel (radio access bearer) function and distribution, rearrange and discharge the function that is used for the required radio resource of radio resource visit.In this case, the radio access aggregate channel represents to be used for the service that is provided by the second layer of the transfer of data between subscriber equipment and the UTRAN.That is, ' setting up a radio access aggregate channel ' expression has stipulated to be used to provide a required protocol layer of special services and the characteristic of a channel, and has set up special parameter and method of operation separately.
Be the detailed description of rlc layer afterwards.There are three kinds of patterns in function according to being carried out by rlc layer, as transparent mode, and Unacknowledged Mode and affirmation mode.
At first, when RLC operates with transparent mode, on RLC SDU, do not add any header information from the upper strata.Usually, Segmentation and Reassembly is not used in transparent mode.But, if desired, when the radio access aggregate channel of having set up (configuration), determine whether to have used the Segmentation and Reassembly function.
The second, when RLC operates with Unacknowledged Mode, even the transmission of RLC PDU failure is not supported to send yet again.Therefore, when the loss of data in process of transmitting or the problem of generation, a recipient does not require and sends.On the contrary, the recipient abandons related data.Using the service of Unacknowledged Mode is the duolateral cell broadcast service, uses the voice service (by the voice service of IP) of IP network, like that.
At last, when RLC operates with affirmation mode, when the transmission of a grouping is failed, support to send again.That is, the rlc layer of transmit leg receives the state information that can judge that transmission is whether successful from the recipient, and then sends institute and require the RLC PDU of transmission again.In the process with the affirmation mode operation, if desired, the RLC SDU that is received from the upper strata by rlc layer is divided into predefined size by segmentation/cascade, becomes the RLC PDU that has added the header information that comprises sequence number then.These RLC PDU are stored in the RLC buffer according to sequence number.The RLC PDU that equals the desired exact amount of MAC layer of storage is sent to the MAC layer, and wherein, transmission is to carry out according to the order of sequence number substantially.From the rlc layer of transmit leg, send the RLC PDU of one first-transmission according to the order of sequence number.Therefore, the sequence number of recipient's rlc layer inspection reception is so that the data that require the rlc layer of transmit leg to send once more-fail.
When arriving RLC SDU (service data unit) corresponding to the rlc layer in the radio communications system of transmit leg when getting off and not being sent to another radio communications system corresponding to the recipient, transmit leg need abandon SDU so that prevent the transmission buffer overload.
Rlc layer uses a kind of function that abandons SDU (service data unit), and this function also obtains embodying in rrc layer.
Two kinds of methods of carrying out the SDU discard are arranged.
First kind is a kind of time-based SDU discarding method.That is, use a timer to carry out time-based SDU discarding method.Second kind of SDU discarding method depends on restriction and sends number of times.First method is measured the time that SDU stops, and second method measurement PDU is sent how many times again.In this case, target to be abandoned is SDU.
For time-based SDU discarding method, when RLC SDU comes rlc layer under the upper strata of transmit leg, drive one and calculate the timer that abandons that each RLC SDU rests on duration in the rlc layer.
Afterwards, when the RLC SDU of correspondence is not sent to the recipient yet when up to the time of abandoning of being provided with-timer expiration, even perhaps Dui Ying RLC SDU is sent to the recipient and an ACK (affirmation) signal when the side of being received does not receive, abandon all RLC PDU that comprise corresponding SDU corresponding to recipient's radio communications system.
On the other hand, if the RLC SDU that should not be dropped is included among the same RLC PDU with the RLCSDU that should be dropped, transmit leg will not abandon corresponding RLC PDU.
Below explanation is depended on second kind of SDU discarding method that restriction sends number of times.
The rlc layer of transmit leg is counted the transmission number of times of the RLC PDU separately that mails to the recipient.That is, the counter VT-DAT of the transmission number of times of a calculating RLC PDU separately is activated operation.When a RLC PDU who is responsible for by counter VT-DAT was sent to the recipient, counter VT-DAT added 1 to count value at every turn.
The number of times that may send of the RLC PDU that certain is specific is defined as a maximum variable MaxDAT.If the count value of counter VT-DAT equals or is higher than maximum variable MaxDAT, be included in SDU among the corresponding RLC PDU and all RLC SDU that before the RLC of correspondence PDU, have been sent out and be dropped.
Fig. 2 A represents a schematic diagram that is used to explain a kind of method of the information that abandons that sends the RLC SDU that is abandoned by time-based RLC SDU discarding method according to prior art to the recipient.
Referring to Fig. 2 A, rlc layer receives RLC SDU0 from the upper strata, RLC SDU1, and RLC SDU2 and RLC SDU3 convert them to RLC PDU form, and RLC PDU form is sent to the recipient successively.In this case, RLC SDU is by predetermined data unit, upper strata.
Thereby the SDU separately shown in Fig. 2 A is loaded at least one RLC PDU and is sent to the recipient.
In Fig. 2 A, SDU0, SDU1, SDU2 and SDU3 comprise PDU0/PDU1 respectively, PDU1, PDU1/PDU2/PDU3 and PDU3 are to PDU7.Sequence number SN 0 to 7 shown in Fig. 2 A is awarded each PDU respectively successively, and PDU0 is to PDU7.Therefore, the PDU that indicates sequence number is sent out toward the recipient.
Referring to Fig. 2 A, after making SDU0 can rest on the Preset Time expiration of transmit leg to SDU3, PDU0 and PDU1 are sent to the recipient, but PDU2 and PDU3 lose in process of transmitting.Simultaneously, PDU4 also is not sent to the recipient from transmit leg to PDU7.
Mentioned as described above, in case to the Preset Time expiration of SDU0 to SDU3, transmit leg abandons corresponding to the SDU0 in the inner transmission buffer to the PDU0 of SDU3 to PDU7, so that transmit the corresponding information that abandons to the recipient, the information of abandoning is loaded onto on the MRWSUFI (the super field of movably receiving window).
Fig. 2 B is illustrated in form and the parameter of the MRW SUFI that sends under the situation of Fig. 2 A.
Referring to Fig. 2 B, parameter L ENGTH makes up with 4 bits, the number of the SDU that its expression abandons.Other parameter S N_MRW1 represents each sequence number of PDU respectively to SN_MRW2.Parameter S N_MRW iEach representative in (i=1,2,3 and 4) comprises the sequence number of corresponding PDU of the ending of the SDU that each abandons.Parameter S N_MRW iIn (i=1,2,3 and 4) each makes up with 12 bits.
The SN_MRW that comprises 12 bits iBe illustrated in the sequence number SN of first PDU among one or more PDU of the data with the next SDU that belongs to the SDU that i abandons.That is, consider each SDU unit, SN_MRW i(i is a positive integer) is the information that first PDU of the data of order with SDU just is sent out after the SDU that abandons.
Shown in Fig. 2 B, the parameter L ENGTH of the MRW SUFI of the number of the SDU that expression abandons is represented by " 0100 ".Simultaneously, because the ending of SDU0 belongs to PDU1, SN_MRW 1By " 1 " representative, " 1 " is the sequence number of PDU1.Because the ending of SDU1 belongs to PDU1, SN_MRW 2By " 1 " representative, " 1 " is the sequence number of PDU1.Because the ending of SDU2 belongs to PDU3, SN_MRW 3By " 3 " representative, " 3 " are the sequence numbers of PDU3.Because the ending of SDU3 belongs to PDU7, SN_MRW 4By " 7 " representative, " 7 " are the sequence numbers of PDU7.
The N that comprises 4 bits LENGTHField represents to have a sequence number SN_MRW LENGTHPDU in data, which type of SDU of this data definition will be dropped.If a plurality of SDU of this expression can't enter a PDU, which type of data will be dropped.For example, work as N LENGTHValue when being set to " 0 ", have sequence number SN_MRW LENGTHPDU show that the data corresponding to SDU will be not dropped.Work as N LENGTHValue when being set to " 2 ", abandon data corresponding to second SDU of positive number, have sequence number SN_MRW LENGTHPDU in data be sent out/receive.In Fig. 2 A, N LENGTHRepresent by " 0001 ".
The recipient, it receives the MRWSUFI that conduct as shown in Fig. 2 B abandons information from transmit leg, abandon corresponding to from the SDU0 of an inner reception buffer to the PDU0 of SDU3 to PDU7, and movably receiving window.Afterwards, receive direction sends a confirmation signal corresponding to the radio communications system of transmit leg, and this signal command is sent to transmit leg from the MRW ack msg of the PDU with sequence number SN " 8 ".
The transmit leg that has received signal from the recipient is confirmed successfully to abandon to the PDU7 side of being received corresponding to the PDU0 of SDU to be abandoned, then begins to recipient's transmission corresponding to PDU of sequence number SN " 8 " or the like.
Unfortunately, prior art has following problem or shortcoming.
When the expiration of time of setting in advance by timer or surpass the number that sets in advance by counter, and will abandon all and send relevant SDU the time, to recipient's transmission full detail relevant with the SDU that abandons.As described above mentioned, notify the sequence number of corresponding PDU of the end point of each SDU that abandons to comprise 12 bits, if therefore the SDU that abandons is too much, then the transmitting efficiency of transmit leg reduces greatly.That is, the transmission that abandons information is that next receive window is overlapped with next send window.But, unnecessarily all information have been sent about the SDU that all abandons to the recipient, even it is only just enough about the information that abandons of the beginning of staying a series of SDU in the inner transmission buffer and end point to recipient notice, wherein, the beginning of a series of SDU and end point are known and these SDU are not sent out as yet.Therefore, wasted radio resource.
And, if the PDU3 among supposition Fig. 2 A never was sent out, when time-based discarding method according to prior art, SDU0 rests on time in the transmission buffer when surpassing a scheduled time to SDU3, the rlc layer of transmit leg abandons SDU0 to SDU3, and sends above-mentioned information to rlc layer.But, be sent to the recipient about the information of SDU3 (SDU3 is never attempted to be sent, so the probability that the recipient receives it is zero), thereby also wasted radio resource.
Summary of the invention
Therefore, the present invention aims to provide a kind of being used for and sends the method for data at radio communications system from rlc layer, and this method has been eliminated one or more problem that causes owing to the limitation of prior art and shortcoming in fact.
An object of the present invention is to provide a kind of being used in the method for a radio communications system from rlc layer transmission data, this method makes can use radio resource efficiently.
Another object of the present invention provides a kind of being used in the method for radio communications system from rlc layer transmission data, the feasible transmitting efficiency that can improve radio communications system of this method.
Other advantages of the present invention, purpose and feature will partly propose in the following description, partly can examined following explanation back understanding or can obtained by practice of the present invention by those skilled in the art.The mode that purpose of the present invention and other advantages can pass through to particularly point out in the explanation write and claim and the accompanying drawing realizes and obtains.
In order to realize these purposes and other advantages, according to purpose of the present invention, as in this embodiment and broad sense explanation, a kind of method that sends data in radio communications system from the rlc layer with the affirmation mode operation may further comprise the steps: the service data unit SDU that storage receives from the upper strata in transmission buffer according to the present invention; To convert the protocol Data Unit PDU that will send to the recipient from the service data unit on upper strata to; Abandon at least one service data unit; Send to the recipient with the information that abandons of at least one service data unit that will abandon; It is characterized in that: check that whether having disposed the MRW transmission is provided with designator; And if disposed this MRW and send designator is set, then send the information that abandons about each service data unit that abandons; If perhaps dispose this MRW transmission designator is not set, then sends the information that abandons about the service data unit that abandons at last.
Preferably, the information that abandons of this part is corresponding to the mobile location information of recipient's receive window.
Preferably, further be included in the recipient and abandon the information movably receiving window according to part.
Preferably, this at least one service data unit SDU is corresponding at least one the protocol Data Unit PDU that stores in buffer.
Preferably, if satisfy condition, then this at least one service data unit SDU is dropped.
Preferably, receive this at least one service data unit SDU from the upper strata after, when in the time still at least one service data unit SDU can not being sent to the recipient through predetermined period of time, this condition is satisfied.
Preferably, even when being sent to a few protocol Data Unit PDU pre-determined number still can not be from recipient's confirmation of receipt ack signal the time, this condition is satisfied.
Preferably, the part of this service data unit SDU abandons information and is loaded into the window that will be sent to the recipient and moves designator.
Preferably, to move designator be the super field MRW SUFI of movably receiving window to this window.
Preferably, the super field MRW SUFI of this movably receiving window comprises whether the service data unit SDU of the last transmission of at least one service data unit SDU of abandoning of indication surpasses the LENGTH field of the scope of send window, and indication comprises the SN_MRW of sequence number of last protocol Data Unit PDU of the service data unit SDU of last transmission LENGTHThe N of field and indication particular order of the last service data unit SDU that sends in having the final agreement data cell PDU of sequence number LENGTHField.
Preferably, the part of this service data unit SDU abandons the information that information is the service data unit SDU that abandons at last.
In another aspect of this invention, a kind of method that in radio communications system, sends data, may further comprise the steps: the sending mode that is provided for service data unit SDU at wireless chain control layer is set up designator; The service data unit SDU that will receive from the upper strata is converted to protocol Data Unit PDU; If satisfy condition then abandon at least one service data unit SDU; Set up designator according to the sending mode that is provided with and send the whole or information that partly abandons of at least one the service data unit SDU that abandons to the recipient, wherein, the whole or part of this service data unit SDU abandons the mobile location information of information corresponding to recipient's receive window.
Preferably, further be included in the recipient and abandon the information movably receiving window according to whole or part.
Preferably, receive at least one service data unit SDU from the upper strata after, when in the time still at least one service data unit SDU can not being sent to the recipient through predetermined period of time, this condition is satisfied.
Preferably, even when being sent to a few protocol Data Unit PDU pre-determined number still can not be from recipient's confirmation of receipt ack signal the time, this condition is satisfied, and wherein at least one service data unit SDU is written at least one protocol Data Unit PDU.
Preferably, this service data unit SDU whole or part abandon information and are sent to the recipient by the field by the status protocol data cell that sends control information.
Preferably, the part of this service data unit SDU abandons the information that information is the service data unit SDU that abandons at last.
Preferably, this field is the super field MRW SUFI of movably receiving window.
Preferably, the super field MRW SUFI of this movably receiving window comprises whether the service data unit SDU of the last transmission of at least one service data unit SDU of abandoning of indication surpasses the LENGTH field of the scope of transmission window, and indication comprises the SN_MRW of sequence number of last protocol Data Unit PDU of the service data unit SDU of last transmission LENGTHThe N of field and indication particular order of the last service data unit SDU that sends in having the final agreement data cell PDU of sequence number LENGTHField.
Preferably, the super field MRW SUFI of this movably receiving window comprises that the indication continuous information is the type field of the super field MRW SUFI of movably receiving window, the LENGTH field of the number of at least one service data unit SDU that indication abandons is indicated the SN MRW of each sequence number of each the last protocol Data Unit PDU that comprises the service data unit SDU that each abandons i, (i=1,2,3 ..., N, N are positive integers) N of particular order of field and indication each service data unit SDU that abandons at last in having each respective protocol data cell PDU of described each sequence number LENGTHField.
Preferably, the part of this service data unit SDU abandons the information that information is the service data unit SDU that abandons at last.
In another aspect of this invention, a kind of method that receives data in radio communications system in the rlc layer of affirmation mode operation may further comprise the steps: the information that abandons that is received at least one service data unit that transmit leg abandons; With position according to the information that the abandons movably receiving window that receives; It is characterized in that, send designator is set that the then described information that abandons comprises information about each service data unit that abandons if disposed MRW; Send designator is not set if perhaps dispose this MRW, the then described information that abandons comprises information about the service data unit that abandons at last.
Preferably, this mobile location information that is used for receive window is to receive in the field of wireless chain control layer by the status protocol data cell PDU that sends control information.
Preferably, this mobile location information that is used for receive window is the information at the service data unit SDU that abandons at last of transmit leg.
Preferably, the field of this status protocol data cell PDU is the super field MRW SUFI of movably receiving window.
Preferably, the super field MRW SUFI of this movably receiving window comprises: whether the service data unit SDU of the last transmission of at least one service data unit SDU of abandoning of indication surpasses the LENGTH field of the scope of transmission window, and indication comprises the SN_MRW of sequence number of last protocol Data Unit PDU of the service data unit SDU of last transmission LENGTHThe N of field and indication particular order of the last service data unit SDU that sends in having the final agreement data cell PDU of sequence number LENGTHField.
Should be appreciated that above-mentioned general remark of the present invention and following detailed description are exemplary and explanat, aim to provide further specifying of claim that the present invention is proposed.
Description of drawings
Included being used to provides further understanding of the present invention, and is included in this application and constitutes its a part of accompanying drawing, and embodiments of the invention have been described, and and specification help to explain principle of the present invention together.In these figure:
Fig. 1 represents the system assumption diagram according to the general radio communication system of prior art.
Fig. 2 A represents that is used to explain an a kind of schematic diagram that sends the information that abandons of the RLC SDU that is abandoned by time-based RLC SDU discarding method according to prior art to the recipient;
Fig. 2 B is illustrated in form and the parameter of the MRW SUFI that sends under the situation of Fig. 2 A;
Fig. 3 represents the table of MRW SUFI according to an embodiment of the invention;
Fig. 4 represents the table of MRW SUFI according to another embodiment of the invention;
Fig. 5 represents to use the MRW SUFI shown in Fig. 3 to carry out the schematic diagram of discard;
Fig. 6 represents to use the MRW SUFI shown in Fig. 4 to carry out the schematic diagram of discard;
Fig. 7 represents to move the flow chart of the discard of the radio communications system that corresponds respectively to transmit leg and recipient;
Fig. 8 represents according to the present invention, according to the restriction of the time of staying in the transmission buffer in a radio communications system, carries out the schematic diagram of discard for service data unit; With
Fig. 9 represents according to the present invention, according to the restriction of the time of staying in the transmission buffer in a radio communications system, carries out the flow chart of discard for service data unit.
DETAILED DESCRIPTION OF THE PREFERRED
Example below with reference to the accompanying drawings is to a preferred embodiment of the present invention will be described in detail.
In the present invention, when a rlc layer is produced when being used for setting up a radio bearer channels by upper strata, pre-configured one is used for MRW that SDU abandons information and sends designator is set.
If the MRW pattern that has disposed is provided with designator, for example, if be provided with the sequence number pattern of a PDCP layer, transmit leg and recipient's PDCP layer makes PDCP PDU, and promptly the sequence number of RLC SDU meets mutually.Therefore, should dispose the MRW pattern designator is set.Therefore, designator is set if set up the MRW pattern of configuration, the rlc layer of transmit leg send about the SDU that abandons to another rlc layer corresponding to another radio communications system of recipient all abandon information.
In this case, abandon the sequence number that information comprises the PDU of the ending that belongs to each SDU that abandons.In detail, the information of abandoning comprises a field, and this field list is shown in the sequence number of RLC PDU of original position of the next SDU of each SDU that abandons.If two SDU and a PDU are overlapping, and previous SDU is dropped, and the sequence number of PDU is represented the ending of the SDU that abandons.If the border between two SDU overlaps with the border of two PDU, and previous SDU is dropped, and the sequence number of second PDU is represented the ending of the SDU that abandons.
Simultaneously, if when producing rlc layer, do not dispose the MRW mode indicators, for example,, send the information that abandons fully or partly to the recipient about the SDU that abandons corresponding to the radio communications system of transmit leg if the sequence number pattern of PDCP layer is not set.Certainly, it can send all information that abandons to the recipient.
In this case, the part of the information that abandons of the needed receive window that is used for mobile recipient is represented the positional information of the SDU that last abandons.Specifically, this part that abandons information is represented the sequence number of the PDU of an ending that belongs to last SDU that abandons.
Simultaneously, as described above mentioned, may be included among the MRW SUFI about the information that abandons of the SDU that abandons.
MRW SUFI is built into as shown in Figure 3, makes it possible to send to the recipient the whole information that abandons of the SDU that abandons.Fig. 3 represents MRW SUFI table according to an embodiment of the invention.
Referring to Fig. 3, MRW SUFI comprises all parameters of the sequence number of all PDU that represent the ending that belongs to the SDU that abandons.
On the other hand, thus MRW SUFI may be constructed such as shown in Figure 4 and can abandon information to the part that the recipient sends the SDU that abandons.Fig. 4 represents the table of MRW SUFI according to another embodiment of the invention.
Referring to Fig. 4, MRW SUFI comprises a parameter, and its representative belongs to the sequence number of PDU of last SDU of the SDU that abandons.
Simultaneously, can use all parameters as shown in Figure 3 to represent the part of the SDU that abandons to abandon information.
At first, if for rlc layer configuration MRW pattern is provided with designator, as mentioned in the above description, the information that abandons of the whole SDU that abandons at transmit leg should be sent to the recipient.
Therefore, as shown in Figure 3, MRW SUFI comprises all parameters: LENGTH, SN_MRW 1, SN_MRW 2..., SN_MRW LENGTH-1, SN_MRW LENGTHAnd N LENGTH
The parameter L ENGTH that comprises 4 bits represents the number of the SDU that abandons.Parameter S N_MRW 1, SN_MRW 2..., SN_MRW LENGTH-1And SN_MRW LENGTHRepresent the sequence number of the PDU of the ending that belongs to the SDU that abandons.Each parameter S N_MRW iComprise 12 bits.
Parameter N LENGTHRepresent which SDU so far continuously corresponding to a last SDU who abandons, a last SDU who abandons has and belongs to the PDU of (perhaps representative) ending of a SDU who abandons on this.
If the number of the SDU that abandons is four, parameter L ENGTH is represented by 4 bits " 0100 ".Simultaneously, each SN_MRW i(i=1,2 ..., LENGTH-1, LENGTH) expression belongs to the sequence number of each PDU of the ending of each SDU that abandons.For example, if the next SDU of second SDU that abandons starts from have sequence number the 2nd PDU of " 2 ", parameter S N_MRW 2Represent by sequence number " 2 ".In this case, be used to the parameter of positional information of the SDU that abandons by the sequence number representative of the PDU that next SDU started from.
On the other hand, mentioned in as described above if for rlc layer configuration MRW pattern is not provided with designator, only notify the recipient the required information that abandons of the window that is used for mobile recipient corresponding to the radio communications system of transmit leg.
In this case, the radio communications system corresponding to transmit leg is loaded in the positional information of a last SDU who abandons on the MRW SUFI.
Therefore, Fig. 4 comprises: parameter S N_MRW LENGTH, its representative belongs to the sequence number of PDU of the ending of (expression) last SDU who abandons; With another parameter N LENGTH, it represents that a SDU who abandons is continuously corresponding to the SDU among the represented PDU.Parameter N LENGTHRepresentative in represented PDU with the number of unheeded SDU.
In Fig. 4, the parameter L ENGTH of MRW SUFI represents the transmission information of a SDU who abandons.And, check corresponding to the radio communications system of transmit leg whether a last SDU who abandons has surpassed the capacity of send window.In this case, parameter L ENGTH is different from the parameter in Fig. 3, the expression check result.In addition, may not use such field.
When the last time abandons, and it is when abandoning SDU that information is sent out and being arranged in send window, and radio communications system parameter L ENGTH is set to " 0001 ".And in the time of outside the SDU of a last transmission has exceeded send window or the scope at send window, the field of parameter L ENGTH is set to " 0000 ".
Mentioned as described above, when the information that abandons of transmit leg is sent to the recipient, corresponding to the radio system of transmit leg according to rrc layer whether be (to) its rlc layer disposed transmission MRW pattern designator has been set, to the recipient fully or partly send the information of the SDU that abandons.
Fig. 5 represents to use the message structure of MRW SUFI as shown in Figure 3 to carry out the schematic diagram of discard.
Referring to Fig. 5, this figure has explained the parameter that is included among the MRW SUFI when abandoning RLC SDU.
Suppose that the RLC SDU that comes the rlc layer of transmit leg down is being sent to the recipient.In this case, if be that SDU10 is overtime to the transmitting time that SDU13 presets,, then may abandon SDU10 in timer to SDU13 if perhaps Yu She transmission number is limited.
For example, if in process of transmitting, lost the SDU10 that sends to the recipient to SDU13, if perhaps do not have and can receive positive acknowledgement from the recipient, transmit leg abandons SDU10 to SDU13, sends the information that abandons that is loaded on the MRW SUFI to the recipient then.
MRW SUFI comprises the positional information of the SDU that each abandons.Therefore, the MRW SUFI among Fig. 3 comprises the positional information to four RLC SDU of SDU13 corresponding to SDU10.Therefore, parameter L ENGTH as shown in Figure 5 value becomes " 4 ".And representative belongs to or four parameter S N_MRW of the sequence number of each PDU of the ending of the SDU that represents to abandon separately 1To SN_MRW 4Value be respectively " 1 ", " 1 ", " 3 " and " 7 ".
Simultaneously, last parameter S N MRW 4Expression PDU7, the ending of the SDU13 that its expression abandons.In addition, last parameter S N MRW 4Guide the beginning of SDU14 subsequently, and represent that PDU7 has the priority of transmission when transmission begins once more.Only SDU13 belongs to or represents first SDU that abandons among the PDU7 of ending of a SDU13 who abandons.Therefore, parameter N LENGTHValue be " 1 ".This order is ignored from first SDU of the PDU7 of recipient's transmission, and should receive second SDU.
Simultaneously, as shown in Figure 5, the receive direction transmit leg that has received MRW SUFI sends the response signal MRW_ACK SUFI of MRW SUFI, and abandons corresponding RLC SDU according to the content that is included among the MRW SUFI.The recipient then moves to receive window the position of a last SDU who abandons.In Fig. 5, the recipient moves to the have sequence number PDU of " 7 " to receive window.
In addition, the information that abandons of the RLC SDU that the side of being sent out abandons is transmitted on upper strata of receive direction.
Fig. 6 represents to use the MRW SUFI shown in Fig. 4 to carry out the schematic diagram of discard.
When RRC does not dispose transmission MRW mode indicators, often use Fig. 6.In Fig. 6, if the time that timer is preset is expired, limit is crossed in the restriction that perhaps sends number, then abandons SDU10 to SDU13.
As described above, when configuration does not send the MRW mode indicators, needn't send whole information that abandon of all SDU that abandon to the recipient.As illustrated in fig. 4, be necessary location information notification recipient a last SDU who abandons.
Therefore, MRW SUFI comprises the positional information of a SDU13 who abandons, and this SDU13 does not exceed send window.Therefore, the value of the parameter L ENGTH among Fig. 6 becomes " 1 ".And, as shown in Figure 6, belonging to or represent that the RLCPDU of the ending of a SDU13 who abandons is PDU7, SDU13 is first that abandons from PDU7.Therefore, parameter S N MRW 1Value be " 7 ", parameter N LENGTHValue become " 1 ".
Simultaneously, the recipient who has received MRW SUFI abandons PDU0 to PDU6, and these PDU have the sequence number that is equal to or less than the parameter S N_MRW " 7 " that is included among the MRW SUFI.If received PDU7, the recipient also abandons PDU7.The recipient then moves to the have sequence number PDU7 of " 7 " to receive window.
In addition, configuration sends the recipient of MRW mode indicators as yet, does not send the information that abandons to SDU13 about the SDU10 that abandons to the upper strata.In this case, the sequence number of each (corresponding to RLC SDU's) PDCP PDU if present, fails to meet mutually.
Fig. 7 represents to correspond respectively to the operational flowchart of discard of transmit leg and recipient's radio communications system.
Fig. 8 represents according to the present invention, according to transmitting time that is provided with in the timer in a radio communications system and limited transmission number of times, carries out the schematic diagram of discard for service data unit.
With reference to figure 7 and Fig. 8, will explain operation below in detail corresponding to the discard of transmit leg and recipient's radio communications system.
At first, send the time-based service data unit RLC SDU0 of PDU form (such as PDU0 to PDU7) continuously to RLC SDU4 from the radio communications system of transmit leg to recipient's radio communications system.
When corresponding to separately service data unit SDU0 to the protocol Data Unit PDU0 separately of SDU4 to PDU7 and sequence number SN=0 when SN=7 is sent to the recipient, transmit leg checks whether whether overtime or default transmission number surpasses RLC service data unit RLC SDU0 limits to the default transmitting time of RLC SDU3.
If for RLC service data unit RLC SDU0 does not have overtimely to the default transmitting time of RLC SDU4, perhaps above limiting, the sending direction recipient repeatedly sends RLC SDU0 to RLC SDU4 to Yu She transmission number.In this case, transmit leg checks to the reception of the PDU of transmission whether RLC SDU0 is sent to the recipient to RLC SDU4 by affirmation.
If, also do not obtain confirming that transmit leg concludes that RLC SDU0 separately is not sent to the recipient to RLC SDU4 up to being that RLC service data unit RLC SDU0 surpasses restriction to the overtime or default transmission number of the default transmitting time of RLC SDU4.
If RLC SDU0 is sent to the recipient to RLC SDU4, then the transmit leg inspection whether be/disposed transmission MRW mode indicators to rlc layer.Fail to be sent to the recipient if conclude RLCSDU0 separately to RLC SDU4, transmit leg abandons the RLC SDU separately that is sent.If disposed transmission MRW mode indicators, transmit leg abandons the RLC SDU separately that is sent, and sends whole information that abandon about the SDU separately that is abandoned to the recipient, sends the PDU information corresponding to SDU to be sent afterwards.
If configuration does not send the MRW mode indicators, the sending direction recipient sends part and abandons information.In this case, certainly send whole information that abandon of the SDU that abandons separately to the recipient.Because explain in the above description, so omitted about abandoning information and the explanation of having loaded the MRW SUFI of the information that abandons at this.
Fig. 8 represents according to the present invention, according to the restriction of the time of staying in the transmission buffer in a radio communications system, carries out the schematic diagram of discard for service data unit.
Fig. 9 represents according to the present invention, according to the restriction of the time of staying in the transmission buffer in a radio communications system, carries out the flow chart of discard for service data unit.
If if RLC service data unit RLC SDU0 separately surpasses restriction and RLC separately to the overtime or default transmission number of the default transmitting time of RLC SDU4
SDU0 fails to be sent to the recipient at least a portion of RLC SDU4, and transmit leg begins to corresponding to subsequently with the sequence number numbering of the PDU of the SDU that is sent out from the sequence number of the PDU that do not send now with connecting.
What carry out then is to check whether disposed the process that sends the MRW mode indicators.Because carried out detailed explanation in the above description, the detailed explanation of subsequent process is omitted at this.
Simultaneously, if when the information that abandons has been sent to the recipient fully or partly, the recipient asks one to send requirement, and transmit leg sends the RLC PDU that is numbered in order to the recipient once more.
Explained later be to come process that the sequence number of PDU is numbered again according to whether attempting to send separately RLC SDU.
An example using time-based discarding method as shown in Figure 8.
At first, send the RLC SDU0 that receives from the upper strata to RLC SDU4 corresponding to the rlc layer of the radio communications system of transmit leg to the recipient.
In this case, the sending direction recipient sends corresponding to the PDU of RLC SDU0 to RLCSDU4.As shown in Figure 8, send RLC SDU0 to RLC PDU1 to the recipient by RLC PDU0.Send RLC SDU1 by RLC PDU1 to the recipient.Pass through RLC
PDU1, RLC PDU2 and RLC PDU3 send RLC SDU2 to the recipient.And, send RLC SDU3 to RLC PDU6 to the recipient by RLC PDU3.Each RLC PDU has sequence number SN=0 successively, SN=1, SN=3, SN=4, SN=5 and SN=6.
Referring to Fig. 8, although transmit leg has sent respectively corresponding to RLC SDU0 to the RLC PDU0 of RLCSDU2 to RLC PDU2, the recipient has received RLC PDU0 and RLCPDU1, and the affirmation signal ACK that sends from the recipient has lost.(in fact, transmit leg can't know that the recipient does not receive, or transmit leg fails to receive a confirmation of receipt signal.)
Simultaneously, from sending direction recipient's process of transmitting, losing RLC PDU2, and, RLC PDU3 do not sent as yet to RLC PDU6.In this case, transmit leg can't know that the recipient does not receive the RLC PDU2 that loses in process of transmitting, or transmit leg self fails to receive the confirmation of receipt signal.But, never sent RLC PDU3.Therefore, transmit leg confirms that certainly the recipient takes defeat.
In this case, if surpassed time dimension to the buffer stop transmitting time of RLC SDU3 by the default RLC SDU0 of timer, the RLC PDU0 that abandons transmission corresponding to the radio communications system of transmit leg to RLC PDU2 and corresponding to RLC PDU3 to the RLC SDU3 of RLCPDU6 and corresponding to being stored in the transmission buffer, attempted the RLC PDU0 that sends to the RLC SDU0 of RLC PDU2 to RLC SDU2.
Simultaneously, attempted to send the SDU of the RLC SDU which abandons so far, and found the sequence number of first RLC PDU under the data of the RLC SDU that abandons corresponding to the radio communications system inspection of transmit leg.In Fig. 8, under the data of the RLC SDU that abandons and sequence number SN first RLC PDU that never be sent out is " 3 ".In addition, explained that transmit leg uses MRW SUFI to send the information that abandons of the RLC SDU that abandons to the recipient in as described above.In this case, abandon information and comprise the PDU information relevant with SDU to be sent next time.
Transmit leg from the sequence number SN=3 of the PDU3 that never sends and be dropped begin for corresponding to after the sequence number of each PDU of the RLC SDU4 that is sent out is renumberd.The starting point of SDU equals the starting point of PDU.
Therefore, as shown in Figure 8, become " 3 " rather than " 7 " corresponding to the sequence number SN of the PDU7 of the RLCSDU4 that will after RLC SDU3, send.After this, the affirmation carried out has subsequently been disposed the process that sends MRW SUFI with shown in Figure 7 identical.
Simultaneously, receive corresponding to recipient's radio communications system and to abandon information, abandon then corresponding to RLC SDU0 to the RLC PDU0 of RLC SDU3 to RLC PDU6.
Subsequently, the receive direction transmit leg sends one and requires signal, and the RLC PDU that this signal command has sequence number " 3 " is at first sent from transmit leg.
Simultaneously, the sending direction recipient sends and has the next RLC SDU4 that sequence number is the RLC PDU7 of SN=3.In addition, the sequence number of each RLC PDU after RLC PDU7 is from beginning to be renumberd continuously immediately following a number after the sequence number SN=3.And, response above-mentioned requirements signal, the RLC PDU with the sequence number that renumbers is sent from the sending direction recipient.
Fig. 9 illustrates a flow chart that is used for above-mentioned processing.
The rlc layer of transmit leg forms the PDU corresponding to the SDU that must send, and these PDU are sent to the recipient.In this case, constantly check the success/failure that receives.Under the situation of success/failure of not confirming to receive, the SDU application time that rests in the transmission buffer is limited.If time restriction is overtime, abandons corresponding SDU, and stop sending once more.In addition, send information to the recipient about the SDU that abandons.And, check whether the PDU of the data with specific SDU once was sent to the recipient.Therefore, use a sequence number for a sequence number corresponding to the PDU of the SDU that is never attempted to send corresponding to another PDU of new SDU.And the recipient about any information of SDU, does not therefore send the information that abandons yet.But, mentioned as above-mentioned embodiment, when in the PDCP layer, using sequence number, can not so do.Therefore, when configuration does not send the MRW mode indicators, be applicable according to embodiments of the invention.
According to embodiments of the invention, in the radio communications system corresponding to transmit leg, the information that abandons of the relevant RLC SDU that is abandoned in rlc layer is sent to recipient's rlc layer changeably fully or partly according to the configuration that sends the MRW mode indicators.Therefore, the invention enables enough one of energy to have the discard that more a spot of control signal is carried out SDU, and further reduce the load of transmit leg.
In addition, in an embodiment according to the present invention, according to renumbeing corresponding to the success/failure of the transmission of the RLCPDU of RLC SDU sequence number to RLC PDU.When the sending direction recipient sends when abandoning information, partly be used to notify amount of bits about the information that abandons of the service data unit that abandons.That is, only the required information that abandons is sent to the recipient, thereby make it possible to reduce the required number of signals of transmission.Therefore, use the limited wireless electric resources effectively.
The foregoing description only is exemplary, should not be considered to limitation of the present invention.Instruction of the present invention can easily be applied to the device of other types.Description of the invention is used for illustration purpose, does not limit the scope of claim.Those skilled in the art can much replace, improvement and modification.

Claims (24)

  1. One kind in radio communications system from send the method for data with the rlc layer of affirmation mode operation, may further comprise the steps:
    The service data unit SDU that storage receives from the upper strata in transmission buffer;
    To convert the protocol Data Unit PDU that will send to the recipient from the service data unit on upper strata to;
    Abandon at least one service data unit; With
    The information that abandons of at least one service data unit of abandoning is sent to the recipient;
    It is characterized in that:
    Check that whether having disposed the MRW transmission is provided with designator; And
    If disposed this MRW transmission designator is set, then sends the information that abandons about each service data unit that abandons; Perhaps
    If dispose this MRW transmission designator is not set, then sends the information that abandons about the service data unit that abandons at last.
  2. 2. according to the process of claim 1 wherein, about the information that abandons of at least one service data unit of abandoning mobile location information corresponding to recipient's receive window.
  3. 3. according to the process of claim 1 wherein, if satisfy condition, then this at least one service data unit is dropped.
  4. 4. according to the method for claim 3, wherein, receive this at least one service data unit from the upper strata after, when when yet this at least one service data unit not being sent to the recipient through predetermined period of time, this condition is satisfied.
  5. 5. according to the method for claim 3, wherein, even do not receive when being known as the affirmation signal of ack signal from the recipient yet when sending this at least one protocol Data Unit pre-determined number, this condition is satisfied.
  6. 6. according to the process of claim 1 wherein, the information that abandons of this service data unit is loaded into the window that will be sent to the recipient and moves designator.
  7. 7. according to the method for claim 6, wherein, it is the super field MRW SUFI of movably receiving window that this window moves designator.
  8. 8. according to the method for claim 7, wherein, the super field of this movably receiving window comprises whether the service data unit of the last transmission of at least one service data unit of abandoning of indication surpasses the LENGTH field of the scope of send window, and indication comprises the SN_MRW of sequence number of last protocol Data Unit of the service data unit of last transmission LENGTHThe N of field and indication particular order of the last service data unit that sends in having the last protocol Data Unit of this sequence number LENGTHField.
  9. 9. according to the process of claim 1 wherein, send when designator is set when having disposed this MRW, indicate the end point of each service data unit that abandons about the information of each service data unit that abandons.
  10. 10. according to the method for claim 9, wherein, the sequence number of protocol Data Unit under the end point that described information about each service data unit that abandons is described each service data unit that abandons.
  11. 11., do not send when designator is set the end point of the service data unit that abandons at last about the information that the abandons indication of at least one service data unit of abandoning according to the process of claim 1 wherein when disposing this MRW.
  12. 12. according to the method for claim 11, wherein, partial information is the sequence number of the affiliated protocol Data Unit of end point of the described service data unit that abandons at last.
  13. 13. method according to Claim 8, wherein, when the service data unit of the last transmission of at least one service data unit that abandons surpassed the scope of send window, the LENGTH field was set to " 0000 ".
  14. 14. a method that receives data in radio communications system in the rlc layer of affirmation mode operation may further comprise the steps:
    Be received in the information that abandons of at least one service data unit that transmit leg abandons; With
    Position according to the information that the abandons movably receiving window that receives;
    It is characterized in that,
    Send designator is set if disposed MRW, the then described information that abandons comprises information about each service data unit that abandons; Perhaps
    Send designator is not set if dispose this MRW, the then described information that abandons comprises information about the service data unit that abandons at last.
  15. 15. according to the method for claim 14, wherein, about the information of at least one service data unit of abandoning mobile location information corresponding to receive window.
  16. 16. according to the method for claim 15, wherein, this mobile location information that is used for receive window is to receive in the field of wireless chain control layer by the status protocol data cell that sends control information.
  17. 17. according to the method for claim 16, wherein, the field of this status protocol data cell is the super field of movably receiving window.
  18. 18. according to the method for claim 17, wherein, the super field of this movably receiving window comprises: whether the service data unit of the last transmission of at least one service data unit that indication abandons surpasses the LENGTH field of the scope of send window.
  19. 19. according to the method for claim 17, wherein, the super field of this movably receiving window comprises: indication comprises the SN_MRW of sequence number of last protocol Data Unit of the service data unit of last transmission LENGTHThe N of field and indication particular order of the last service data unit that sends in having the final agreement data cell of this sequence number LENGTHField.
  20. 20. according to the method for claim 14, wherein, send when designator is set, indicate the end point of each service data unit that abandons about the information of each service data unit that abandons when having disposed this MRW.
  21. 21. according to the method for claim 20, wherein, the sequence number of protocol Data Unit under the end point that described information about each service data unit that abandons is described each service data unit that abandons.
  22. 22., wherein, do not send when designator is set the end point of the service data unit that abandons at last about the information that the abandons indication of at least one service data unit of abandoning according to the method for claim 14 when disposing this MRW.
  23. 23. according to the method for claim 22, wherein, this abandons the sequence number that information is the affiliated protocol Data Unit of end point of the described service data unit that abandons at last.
  24. 24. according to the method for claim 18, wherein, when the service data unit of the last transmission of at least one service data unit that abandons surpassed the scope of send window, the LENGTH field was set to " 0000 ".
CNB2005100824905A 2000-10-07 2001-09-28 Method for transmitting data from RLC layer in radio communication system Expired - Fee Related CN100446454C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1020000059017A KR100344981B1 (en) 2000-10-07 2000-10-07 Transmission Method for discard information of time based service data unit
KR59017/2000 2000-10-07
KR27269/2001 2001-05-18

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CNB011415193A Division CN1285225C (en) 2000-10-07 2001-09-28 Method for transmitting datas from radio chain-circuit control layer in radio communication system

Publications (2)

Publication Number Publication Date
CN1716839A CN1716839A (en) 2006-01-04
CN100446454C true CN100446454C (en) 2008-12-24

Family

ID=19692356

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2005100824905A Expired - Fee Related CN100446454C (en) 2000-10-07 2001-09-28 Method for transmitting data from RLC layer in radio communication system

Country Status (2)

Country Link
KR (1) KR100344981B1 (en)
CN (1) CN100446454C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100802619B1 (en) 2002-11-07 2008-02-13 엘지전자 주식회사 Method for receiving data in a receiver under radio link control protocolprocessing method for rlc reception window
TWI307589B (en) * 2005-05-18 2009-03-11 Innovative Sonic Ltd Method and apparatus of data segmentation in a mobile communications system
EP2039047A4 (en) * 2006-07-07 2012-05-02 Ericsson Telefon Ab L M Medium access control discard notification

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5715257A (en) * 1994-10-11 1998-02-03 Nippon Telegraph And Telephone Corporation System for re-transmission in data communication
US5790551A (en) * 1995-11-28 1998-08-04 At&T Wireless Services Inc. Packet data transmission using dynamic channel assignment
EP1030484A2 (en) * 1999-01-29 2000-08-23 Nortel Networks Corporation Data link layer quality of service for UMTS

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5715257A (en) * 1994-10-11 1998-02-03 Nippon Telegraph And Telephone Corporation System for re-transmission in data communication
US5790551A (en) * 1995-11-28 1998-08-04 At&T Wireless Services Inc. Packet data transmission using dynamic channel assignment
EP1030484A2 (en) * 1999-01-29 2000-08-23 Nortel Networks Corporation Data link layer quality of service for UMTS

Also Published As

Publication number Publication date
CN1716839A (en) 2006-01-04
KR20020028098A (en) 2002-04-16
KR100344981B1 (en) 2002-07-20

Similar Documents

Publication Publication Date Title
EP2288202B1 (en) Method for transmitting data from RLC layer in radio communication system
EP2137910B1 (en) Methods of transmitting data blocks in wireless communication system
AU2003276747B2 (en) Method for moving a receive window in a radio access network
US8023454B2 (en) Apparatus and method for enhanced UM RLC data handling
CN101809948A (en) A method for QoS guarantees in a multilayer structure
CN101868932A (en) A method of performing polling procedure in a wireless communication system
CN100446454C (en) Method for transmitting data from RLC layer in radio communication system
KR100793000B1 (en) Transport method for data of radio link control layer
KR100828322B1 (en) Retransmission method with state variables in the radio link control layer of the UMTS systems
KR100792989B1 (en) Transmission method of discard information of service data unit for a radio communications system
CN100358277C (en) A method for preventing state variable from abnormal update
KR100421863B1 (en) Data Transmission method for a radio communications system, and apparatus for the same
KR101100200B1 (en) method of transmitting header information of packet data for point-to-multipoint multimedia multicast service
KR100883062B1 (en) A method for transmission of information of the radio link control layer in a radio communication system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20081224

Termination date: 20170928