CA2162938A1 - Multiple access cellular communication with circuler interleaving and reduced dropped-packet runlengths - Google Patents

Multiple access cellular communication with circuler interleaving and reduced dropped-packet runlengths

Info

Publication number
CA2162938A1
CA2162938A1 CA2162938A CA2162938A CA2162938A1 CA 2162938 A1 CA2162938 A1 CA 2162938A1 CA 2162938 A CA2162938 A CA 2162938A CA 2162938 A CA2162938 A CA 2162938A CA 2162938 A1 CA2162938 A1 CA 2162938A1
Authority
CA
Canada
Prior art keywords
allocated
users
slots
frame
multiple access
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.)
Granted
Application number
CA2162938A
Other languages
French (fr)
Other versions
CA2162938C (en
Inventor
Haralabos C. Papadopoulos
Carl-Erik Wilhelm Sundberg
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.)
AT&T Corp
Original Assignee
AT&T Corp
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 AT&T Corp filed Critical AT&T Corp
Publication of CA2162938A1 publication Critical patent/CA2162938A1/en
Application granted granted Critical
Publication of CA2162938C publication Critical patent/CA2162938C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
    • H04B7/2656—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for structure of frame, burst
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1694—Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/04—Scheduled or contention-free access

Abstract

An apparatus and method for reducing the runlength of dropped packets in multiple access cellular communication systems. The invention is particularly well suited for use in time-division multiple access (TDMA) systems such as, for example, shared time-division duplexing (STDD) systems, and TDMA/TDD systems with speech activity detection (SAD).
Frame time or frequency slots for communicating information are allocated to a first set of active users. A second set of active users which are not allocated a slot in a given frame are identified. At least one of the users in the second set which remains active in a subsequent frame is provided with a priority in obtaining an allocated slot in the subsequent frame. In one embodiment, the slots allocated to particular active users in the given frame are shifted by at least one slot position if the same users are allocated slots in the subsequent frame. The priority allocation and slot position shifting may be implemented by circular interleaving of the first set of users which have been allocated slots in the given frame with the second set of users which remain active but were not allocated slots in the given frame. The circular interleaving may be utilized with fast speech activity detection (FSAD) in order to further reduce dropped-packet runlengths.
CA002162938A 1994-12-27 1995-11-15 Multiple access cellular communication with circuler interleaving and reduced dropped-packet runlengths Expired - Fee Related CA2162938C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US364,367 1994-12-27
US08/364,367 US5602836A (en) 1993-11-24 1994-12-27 Multiple access cellular communication with circular interleaving and reduced dropped-packet runlengths

Publications (2)

Publication Number Publication Date
CA2162938A1 true CA2162938A1 (en) 1996-06-28
CA2162938C CA2162938C (en) 1999-10-05

Family

ID=23434198

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002162938A Expired - Fee Related CA2162938C (en) 1994-12-27 1995-11-15 Multiple access cellular communication with circuler interleaving and reduced dropped-packet runlengths

Country Status (6)

Country Link
US (1) US5602836A (en)
EP (1) EP0720321B1 (en)
JP (1) JP3510409B2 (en)
CA (1) CA2162938C (en)
DE (1) DE69535827D1 (en)
ES (1) ES2313717T3 (en)

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Also Published As

Publication number Publication date
EP0720321B1 (en) 2008-09-03
EP0720321A1 (en) 1996-07-03
ES2313717T3 (en) 2009-03-01
DE69535827D1 (en) 2008-10-16
JP3510409B2 (en) 2004-03-29
CA2162938C (en) 1999-10-05
US5602836A (en) 1997-02-11
JPH08274740A (en) 1996-10-18

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Effective date: 20081117