WO2001052565A2 - Wireless communication system with selectively sized data transport blocks - Google Patents
Wireless communication system with selectively sized data transport blocks Download PDFInfo
- Publication number
- WO2001052565A2 WO2001052565A2 PCT/US2001/001168 US0101168W WO0152565A2 WO 2001052565 A2 WO2001052565 A2 WO 2001052565A2 US 0101168 W US0101168 W US 0101168W WO 0152565 A2 WO0152565 A2 WO 0152565A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- channel
- data
- logical
- bit size
- mac header
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
-
- 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
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
- H04B7/2637—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] for logical channel control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
Definitions
- the present invention relates to wireless communication systems and, in
- Radio interfaces such as those proposed by the 3 rd Generation Partnership
- TrCHs Transport Channels
- UE User Equipment
- MT Mobile Terminal
- Base Station UE
- TrCHs are a composite of one or more physical channels defined by
- TrCH data is transferred in sequential groups
- Transport Blocks defined as Transport Block Sets (TBSs).
- TBS Transport Block Sets
- TTI Transmission Time Interval
- UE User Equipment
- Transport Format Set For each TrCH, a Transport Format Set (TFS) is specified containing Transport
- Each TF defines a TBS composed of a specified number of TBs where each TB preferably has the same size within a given TBS.
- TrCH number of potential TB sizes are defined with respect to each TrCH.
- Radio Resource Control (RRC) signaling is required between the BS and UE to
- variable size data blocks exist that can not be
- Radio Access Network RAN
- Core Network CN
- NRT Non-Real Time
- RLC provides a segmentation and re-assembly multiplexing function and a padding
- the segmentation and re-assembly multiplexing function reduces the size
- the padding function increases the data block or
- segmented data block size by padding with extra bits to fit a TB size.
- CCCH Control Channel
- the RLC processing results in blocks of data call Protocol Data Units (PDUs).
- PDUs Protocol Data Units
- each RLC PDU is required for control information.
- Using a relatively small RLC PDU results in a lower transfer data to control information ratio
- TB sizes are the sum of the RLC PDU size and a Medium Access Control
- the MAC header size is dependent of the class of traffic, which
- TTF Target Channel Type Field
- a MAC header is provided in the MAC header to indicate to which logical channel a TB is assigned.
- TrCH can support multiple logical channel types. This means that the finite number
- the RLC For RAN and CN signaling data and NRT user data, the RLC generates octet
- RLC PDUs are defined as groups of a
- Channel types have mutually exclusive bit offsets, TB sizes can not be generically
- TB sizes have to be defined for specific MAC headers and
- Applicant has recognized that without common MAC header bit offsets, it is
- a CDMA telecommunication system utilizes a plurality of protocol layers
- MAC medium access control
- MAC layer provides data to the physical layer via plurality of transport channels
- TrCHs Each transport channel (TrCH) is associated with a set of logical channels
- TrCH TrCH
- the physical layer receives blocks of data for transport such that the transport
- blocks (TBs) of data includes of a MAC header and logical channel data for one of the
- TrCHs Each TB transports data for a given TrCH such that the logical channel data
- Each TB has one of a selected limited finite
- the logical channel data for each TB has a bit size evenly
- N is preferably eight (8) so
- the logical data is in the form of an RLC PDU defined in terms of octets of data
- the data manipulation and formatting is performed by one or more
- the MAC header for each TB includes data identifying the selected logical
- the data bit size equals one of the TB bit sizes.
- the MAC header bit size is fixed for TBs
- TrCH TrCH or a different selected logical channel.
- a fixed MAC header bit size is associated with each logical channel within
- TrCH TrCH
- a MAC header can be smaller than
- each MAC header has a data field for data identifying the selected
- the field is preferably selected to determine the modulo N bit size of the MAC header, i.e.
- a shortest data field bit size is preferably provided for the
- the TrCHs includes a forward access channel (FACH) associated with the TrCHs.
- FACH forward access channel
- DTCH dedicated traffic channel
- DCCH dedicated control channel
- SHCCH shared channel control channel
- CCCH common control channel
- CCH common traffic channel
- RACH random access channel
- each MAC header is a MAC header
- TCTF Target Channel Type Field
- TCTF field is selected to determine the modulo N bit size M of the MAC header.
- the modulo N bit size M of the MAC header is preferably 3 modulo 8 for FACH and
- the TCTF data field bit size is preferably 3 with respect to FACH MAC
- TCTF data field bit size is preferably 5 with respect to the FACH MAC headers
- the TCTF data field bit size is preferably 4 with respect to
- Figure 1 is a simplified illustration of a wireless spread spectrum
- Figure 2 is an illustration of data flowing into a common or shared channel.
- Figure 3 is an illustration of data flowing into a FACH channel within a RNC.
- Figure 4 is a schematic diagram illustrating a channel mapping with respect to
- Figure 1 illustrates a simplified wireless spread spectrum code division
- CDMA multiple access
- UE 18 communicates with associated user equipment (UE) 20-24 such as a mobile
- the node b 26 has a single site controller (SC) 30 associated with
- BS single base station
- a BS 28 shown in Figure 1
- RNC radio network controller
- Each RNC 36-40 is connected to a mobile switching center (MSC)
- channels are used by multiple UEs 20-24 or users. All of these channels carry a
- PDUs protocol data units
- packets As shown in Figure 2, to regulate the flow of data from differing sources 48, 50, 52 into a channel 56, a controller 54 is
- One common channel used for transmitting data to the UEs 20-24 is a forward
- FACH frequency access channel
- the FACH 58 carries several data types from various sources, such as
- CCCH common control channel
- DCCH dedicated control and traffic channel
- DSCH and USCH downlink and uplink shared channel
- the FACH 58 also carries
- RNCs 38-40 such as CCCH, DCCH and DTCH control data.
- RNC 36 Various controllers are used by the RNC 36 to control the flow of data.
- radio link controller (RLC) 64 handles the CCCH.
- RLC radio link controller
- MAC-d controller (MAC-d) 66 handles the DCCH, the DTCH.
- controller (MAC-sh) 68 handles the DSCH, USCH control signaling. Controlling the
- FACH 58 is a common medium access controller (MAC-c) 60.
- MAC-c medium access controller
- TrCHs transport data over the physical layer 72 to associated physical channels
- Each of the TrCHs 74 is associated with one or more logical channels 78.
- TrCHs communicate by using transport blocks (TB) which are comprised of a MAC
- the MAC header has logical channel identification information.
- the RLC PDU is defined by
- the TrCHs 74 include a dedicated channel (DCH), a downlink
- DSCH shared channel
- CPCH common packet channel
- RACH forward access channel
- FACH forward access channel
- PCH paging channel
- BCH physical channel
- DPDCH physical downlink shared channel
- DPSCH physical downlink shared channel
- PCCH packet channel
- PRACH physical random access channel
- SCCPCH common control physical channel
- PCCPCH Physical channel
- the logical channels preferably include a dedicated traffic channel (DTCH), a
- DCCH dedicated control channel
- SHCCH shared control channel
- CCCH control channel
- CCH common traffic channel
- CCH paging control channel
- PCCH personal area network
- BCCH broadcast control channel
- the FACH may transport data to the
- SCCPCH from any one of the set of logical channels including the DTCH, the DCCH,
- the RACH transports data to the SHCCH, the CCCH, or the CTCH.
- TrCH This allows the number of specified TFs for a TFS to be minimized thereby
- a bit aligned MAC header resolves both the radio resource efficiency issues
- D bits are adjusted to match Y bits. In some cases this means A and/or B octets must
- X, A or B may be 0. All TB sizes specified by RRC signaling for a specific TrCH channel will have
- That Y bit offset being applicable to the MAC headers for all Logical
- each TrCH type may have a different bit
- the offset is preferably defined by the most limited Logical
- each TrCH type has an independent optimized MAC header bit offset.
- the invention has the additional benefit of removing processor intensive layer
- RLC and Radio Resource Control (RRC) entities generate
- TrCH's have variable bit offsets it is only possible to avoid bit shifting in BS
- RRC Transport Format Set (TFS) signaling is used to define Transport Block
- TB Transport Format
- TF Transport Format
- TrCH's TFS there is a maximum of 32 possible TB sizes in each TrCH's TFS.
- Unacknowledged Mode (UM) PDU's will be padded to match the next larger TB
- the PDU size is always octet aligned and in
- Time Division Duplex a variable non-octet aligned MAC header exists.
- Table 1 reflects a preferred prior art MAC header size
- the preferred solution is to increase the DCCH/DTCH TCTF by
- octet+2 i.e. 2 modulo 8
- Another benefit of MAC header bit alignment is the ability to remove the UE
- the RLC generates and expects to receive
- TrCH bit offset is constant for all logical channel types supported for a
- the physical layer can pad the MAC header to octet align the UE DL and
- TrCH should be minimized to reduce the layer 3 signaling load. It is also necessary to minimize
- TrCHs TrCHs. Additionally, variable bit shifted MAC headers result in requiring layer 2 bit
- MAC header bit alignment is defined to avoid duplication of TB size definitions for octet
- the MAC header preferably includes a Target Channel Type
- the TCTF field is a flag that provides identification of the logical
- the preferred size of the TCTF field of FACH for TDD is either 3 or 5 bits
- TDD for TDD is either 2 or 4 bits depending on the value of the 2 most significant bits.
- Bit aligned MAC headers allow common TB sizes to be defined for different
- TrCH supports many different traffic types. Optimally for RACH and FACH, each TB
- Table 4 is a preferred
- Transport Format Set (TFS) in a 3G system.
- Dynamic transport format information correspond to transport format 0 for this transport
- MAC headers are not octet aligned, to calculate TB size the MAC header bit offset is
- TrCHs the 4 bit C/T is added if MAC multiplexing is applied, for FACH the 3 bit TCTF
- UTRAN should configure a transport format
Abstract
Description
Claims
Priority Applications (17)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01942499A EP1247354B1 (en) | 2000-01-14 | 2001-01-12 | Wireless communication system with selectively sized data transport blocks |
CA002397398A CA2397398C (en) | 2000-01-14 | 2001-01-12 | Wireless communication system with selectively sized data transport blocks |
JP2001552657A JP3909823B2 (en) | 2000-01-14 | 2001-01-12 | Wireless communication system using selectively sized data transport blocks |
DE60103500T DE60103500T2 (en) | 2000-01-14 | 2001-01-12 | WIRELESS COMMUNICATION SYSTEM WITH SELECTIVELY DIMENSIONED DATA TRANSPORT BLOCKS |
KR1020047017533A KR100642099B1 (en) | 2000-01-14 | 2001-01-12 | Wireless communication system with selectively sized data transport blocks |
AT01942499T ATE268076T1 (en) | 2000-01-14 | 2001-01-12 | WIRELESS COMMUNICATION SYSTEM WITH SELECTIVELY DIMENSIONED DATA TRANSPORT BLOCKS |
BRPI0107785-6B1A BR0107785B1 (en) | 2000-01-14 | 2001-01-12 | WIRELESS COMMUNICATION SYSTEM WITH SELECTIVELY SIZED DATA TRANSPORT BLOCKS |
MXPA02006903A MXPA02006903A (en) | 2000-01-14 | 2001-01-12 | Wireless communication system with selectively sized data transport blocks. |
AU2001229450A AU2001229450A1 (en) | 2000-01-14 | 2001-01-12 | Wireless communication system with selectively sized data transport blocks |
DE1247354T DE1247354T1 (en) | 2000-01-14 | 2001-01-12 | WIRELESS COMMUNICATION SYSTEM WITH SELECTIVELY DIMENSIONED DATA TRANSPORT BLOCKS |
IL15029201A IL150292A0 (en) | 2000-01-14 | 2001-01-12 | Wireless communication system with selectively sized data transport blocks |
IL150292A IL150292A (en) | 2000-01-14 | 2002-06-18 | Wireless communication system with selectively sized data transport blocks |
IL184402A IL184402A0 (en) | 2000-01-14 | 2002-06-18 | Wireless communication system with selectively sized data transport blocks |
NO20023245A NO326462B1 (en) | 2000-01-14 | 2002-07-04 | Wireless communication system with selectively selected size of transport blocks |
FI20021355A FI126427B (en) | 2000-01-14 | 2002-07-10 | A wireless communication system with selectively sized data blocks |
HK03102575A HK1051937A1 (en) | 2000-01-14 | 2003-04-09 | Wireless communication system with selectively sized data transport blocks. |
IL184402A IL184402A (en) | 2000-01-14 | 2007-07-04 | Wireless communication system with selectively sized data transport blocks |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17615000P | 2000-01-14 | 2000-01-14 | |
US60/176,150 | 2000-01-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001052565A2 true WO2001052565A2 (en) | 2001-07-19 |
WO2001052565A3 WO2001052565A3 (en) | 2002-02-21 |
Family
ID=22643191
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/001168 WO2001052565A2 (en) | 2000-01-14 | 2001-01-12 | Wireless communication system with selectively sized data transport blocks |
Country Status (20)
Country | Link |
---|---|
US (6) | US6807192B2 (en) |
EP (2) | EP1247354B1 (en) |
JP (5) | JP3909823B2 (en) |
KR (3) | KR100642099B1 (en) |
CN (6) | CN101364834A (en) |
AT (2) | ATE268076T1 (en) |
AU (1) | AU2001229450A1 (en) |
BR (1) | BR0107785B1 (en) |
CA (2) | CA2397398C (en) |
DE (3) | DE60103500T2 (en) |
DK (1) | DK1247354T3 (en) |
ES (1) | ES2219532T3 (en) |
FI (1) | FI126427B (en) |
HK (2) | HK1070757A1 (en) |
IL (4) | IL150292A0 (en) |
MX (1) | MXPA02006903A (en) |
NO (1) | NO326462B1 (en) |
SG (2) | SG158743A1 (en) |
TW (1) | TW512639B (en) |
WO (1) | WO2001052565A2 (en) |
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