CN1158788C - Packet transmission method - Google Patents

Packet transmission method Download PDF

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Publication number
CN1158788C
CN1158788C CNB008126690A CN00812669A CN1158788C CN 1158788 C CN1158788 C CN 1158788C CN B008126690 A CNB008126690 A CN B008126690A CN 00812669 A CN00812669 A CN 00812669A CN 1158788 C CN1158788 C CN 1158788C
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CN
China
Prior art keywords
base station
header
frame
network controller
information
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Expired - Lifetime
Application number
CNB008126690A
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Chinese (zh)
Other versions
CN1373943A (en
Inventor
��ŵ�������ᡤ˹�����ŵ
吉诺·安东尼·斯克里巴诺
T
罗伯特T·洛夫
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Motorola Mobility LLC
Google Technology Holdings LLC
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Motorola Inc
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Publication date
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Publication of CN1373943A publication Critical patent/CN1373943A/en
Application granted granted Critical
Publication of CN1158788C publication Critical patent/CN1158788C/en
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    • 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
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/43—Assembling or disassembling of packets, e.g. segmentation and reassembly [SAR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/304—Reselection being triggered by specific parameters by measured or perceived connection quality data due to measured or perceived resources with higher communication quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/12—Access point controller devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers
    • 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
    • H04L69/22—Parsing or analysis of headers
    • 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
    • H04L69/40—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Small-Scale Networks (AREA)

Abstract

A wireless system includes base station transceivers (102-104) to communicate with at least one mobile station (108), the base station transceivers communicate with a network controller (110). The base station controls a header for a packet frame to be communicated between the base station transceiver and the network controller wherein a portion of the header identifies the frame as one containing no data package. The data bits of the header field may contain a predetermined bit pattern for a frame including no data package. Information received by the base station from the mobile station may be dropped, and the header information replaced with the specified bit pattern, if a decoding metric passes a threshold. The information received by the base station from the mobile station may be dropped, and the header information replaced with the specified bit pattern, if a CRC for the frame received from the mobile station fails.

Description

Block transmission method
Invention field
The present invention relates to be used for transmitted in packets, particularly the transmitted in packets between the cellular basestation transceiver station and the network switch.
The background of invention
In the radio honeycomb data communication system for example in code division multiple access (CDMA) system, grouping of transmitting from base transceiver station (BTS) and radio network controller (RNC) or frame comprise and have control and the header of quality information and the payload that comprises data.These communications are commonly referred to as and are back-haul (backhaul).In these systems, load can comprise that data, control messages or other relate to the information of mobile radio station or the operation of base station transceiver station.When data did not occur, the data payload of this grouping or frame part can comprise filler.And RNC ignores these fillers.
The back-haul load may limit the capacity of whole system.In many cases, the back-haul load is out of question.But when the raising of data demand in existing system, and capacity arrives its limit, back-haul load possibility restriction system capacity.Therefore, need a kind of like this method, it can reduce load and can not have a negative impact to communication.
Brief Description Of Drawings
Fig. 1 is the block diagram of explanation cellular communication system;
Frame or grouping that Fig. 2 explanation is transmitted between base transceiver station and network according to communication system shown in Figure 1.
The detailed description of accompanying drawing
Wireless communication system comprises at least and the base station transceiver of a mobile communications that this base station transceiver is communicated by letter with network controller.The header of the packet frames that this base stations control is transmitted between base station transceiver and network controller, wherein when a frame did not comprise packet, the part of this header identified this frame.The data bit of header fields can comprise a predetermined bit code type for the frame that does not comprise packet.If decoding metrics is by thresholding, the base station may abandon the information that receives from travelling carriage, and replaces this header information with specific bit code type.If to the CRC failure of carrying out from the frame that travelling carriage received, the base station may abandon the information that receives from travelling carriage, and replaces this header information with specific bit code type.
Fig. 1 discloses cellular system 100.Described cellular system 100 is code division multiple access systems, and it just comprises a plurality of base transceiver stations (BTS) 102-104 that communicates by letter with mobile station MS 108 on wireless communications path separately.Those skilled in the art will know, will occur in system generally speaking more than 3 base station transceiver with more than 1 travelling carriage.Base transceiver station 102-103 is connected to mobile switch system network 110.The infrastructure (network controller) of responsible control, adjustment and initialization base transceiver station is so-called to be center base station controller (CBSC) or radio network controller (RNC) or selection/allocation units (SDU).Such Digital Cellular System is known.During normal running, it is used for carrying out back-haul communication between the BTS of the system's control and the communication of breathing out and network controller.
For grouping, circuit or speech data, when the BTS demodulator does not have decoding from the signal of MS, there is no need the grouping payload is transferred to RNC from BTS.Obviously position or unappropriated bit code type can be appended on the header of grouping 200 (Fig. 2).Preferably, the existing bit field of the header that will transmit between base transceiver station and network controller is used to represent that the data payload is empty.Though can use any header, the position in header will be used as signal error rate (SER), eight hytes of for example divide into groups the ratio of thermal noise " signal with " in 200.When data payload (reverse link information) when occurring, this field is used to represent signal quality.If payload does not occur, the predetermined bit code type that can use this field to transmit an expression payload easily not occur (or eight hytes can be a sign).
In operation, when a signal was transferred to RNC 110, position or pattern that BTS 102-104 will be scheduled to were inserted in the selected field.RNC checks whether to find pattern or the flag bit be scheduled to, and whether expression is called as payload here in header " reverse link information " exists.If there is payload, handle in normal mode.If do not have payload to exist,, still handle this frame in an identical manner as long as payload all is a filler.
Those skilled in the art knows, cyclic redundancy check (CRC), and it is arranged in the data payload, if remove the data payload from grouping or frame, then cyclic redundancy check will can not occur.CRC can be offered header obviously, maybe can use the CRC of payload.If used the payload CRC that loses payload, then will only on header, calculate payload CRC.
Like this, can find, can select the bit code type of the frame type bit field of packet header, with the not additional payload of expression.In packet header, can select to use new field.
When the pointer neither one of being distributed to designated user by BTS is in the lock state, can use the present invention easily, by not abandoning being used for the filter data of frame period, more effectively to use reverse back-haul bandwidth.The example of transmission padding data is in existing system, (pointer: when neither one was in " locking " finger), it may switch on the strong service path from weak service path during the soft handover when the channel demodulator corresponding to given travelling carriage (or terminal equipment) communication link.The normal running of the base transceiver station (BTS) of code division multiple access (CDMA) cellular system requires pointer is assigned on the signal path that the serving BS with mobile station communicate receives.Each search time at interval after, be applied to the pointer management rule that activity (activity mean pointer (demodulator) is current be assigned to skew) pseudo noise (PN) skew and potential PN be offset the candidate by a cover and determine the pointer distribution.When the energy of given signal path surpasses a certain search thresholding, determine PN skew candidate by searcher.Movable PN skew has the pointer of distributing to them, and by soft combination of following and the demodulation of decoding institute.
When the energy of the pointer of distributing to movable PN skew was lower than " locking " thresholding, this pointer was disengaged distribution, so that for that pointer demodulation does not take place, and did not re-use this pointer in the diversity combination.Can reallocate to PN candidate more likely, if present removing the pointer that distributes then.If searcher adopts enough energy not detect any PN skew, reporting to the pointer management device, and demodulation does not then take place all because their energy separately drop to and are lower than lock-in threshold and abandon locking in existing active (locked) pointer.At this point, the data that the payload frame is abandoned in the RNC are set to a predetermined pattern (for example complete zero).
Therefore, when not having locking pointer, there is no need to abandon the payload part of given frame period owing to the decoding of not effective position.Eliminate unnecessary payload and can reduce back-haul bandwidth requirement (the back-haul bandwidth is meant desired communication bandwidth between the infrastructure that is generally known as CBSC or RNC or SDU of base transceiver station and responsible control, adjustment and initialization base transceiver station).Therefore, the soft handover of the intercarrier that provides provides an indication to this situation, here header is turned back to RNC separately and does not have the data payload.
This notion can extend to following a kind of situation, when when BTS delete frame (for example place of CRC check failure), even some pointer is still locked.Because some deleted frame still has Useful Information, and corresponding payload needs at RNC, can be by using based on symbol error rate (SER) or some similar frame quality metric, whether send in the judgement of payload or delete frame and make soft-decision.The example of quality frame tolerance can be used for whether transmitting the judgement of the data of the energy metric (BER) that comprises total tolerance or position, for example Gu Suan signal interference ratio (SIR), signal to noise ratio (snr) or Eb/Nt etc.
Like this, disclose a system as can be known, it is used for distributing a new position or uses the bit code type of unappropriated existing field at packet header, with lacking of the data payload part of expression grouping.This can dwindle the bandwidth of average back-haul.When pointer that the user distributed at given serving base transceiver station (BTS) when neither one is in the lock state, the present invention is useful especially, but it also can extend to the frame of being deleted with high SER under carrier wave/operator's judgement.

Claims (4)

1. the block transmission method in the wireless system, described wireless system comprise at least and the base station transceiver of a mobile communications that described base station transceiver is communicated by letter with network controller, and described method comprises the steps:
In base station transceiver, be controlled at the header of the packet frames of transmitting between base station transceiver and the network controller, wherein, when a frame did not comprise packet, the part of this header identified this frame; And
With constructed header this frame is transferred to network controller.
2. block transmission method as claimed in claim 1, wherein for the frame that does not comprise packet, the data bit of this header fields comprises a predetermined bit code type.
3. block transmission method as claimed in claim 1, if wherein decoding metrics is by thresholding, then the base station abandons the information that receives from travelling carriage, and header information is replaced by specific bit code type.
4. block transmission method as claimed in claim 1, if wherein for the CRC check failure from the frame that travelling carriage received, then the base station abandons the information that receives from travelling carriage, and header information is replaced by specific bit code type.
CNB008126690A 1999-09-08 2000-09-08 Packet transmission method Expired - Lifetime CN1158788C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15274199P 1999-09-08 1999-09-08
US60/152,741 1999-09-08

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CN1373943A CN1373943A (en) 2002-10-09
CN1158788C true CN1158788C (en) 2004-07-21

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CNB008125635A Expired - Lifetime CN1274160C (en) 1999-09-08 2000-09-08 Link selection in communication system

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JP (2) JP4659318B2 (en)
KR (2) KR20020030807A (en)
CN (2) CN1158788C (en)
AU (2) AU7129600A (en)
BR (2) BR0013572A (en)
WO (2) WO2001018991A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7203508B2 (en) 2001-06-13 2007-04-10 Ntt Docomo, Inc. Mobile communication systems, mobile communication methods, base stations, mobile stations, and signal transmission methods in the mobile communication systems
CN1550118A (en) * 2001-07-05 2004-11-24 ̩ Method for monitoring radio equipment for communication between a mobile terminal and a cellular infrastructure with spectrum dispersionand arrangement for performing said method
FR2827098B1 (en) 2001-07-05 2003-12-05 Nortel Networks Ltd METHOD FOR CONTROLLING RADIO RESOURCES ASSIGNED TO COMMUNICATION BETWEEN A MOBILE TERMINAL AND A SPREAD-SPECTRUM CELLULAR INFRASTRUCTURE, AND EQUIPMENT FOR IMPLEMENTING THE METHOD
US7190673B2 (en) 2002-06-26 2007-03-13 Interdigital Technology Corporation Method and system that improves interoperability of a radio network controller and a base station in cellular system with downlink congestion control
US8400979B2 (en) * 2003-01-07 2013-03-19 Qualcomm Incorporated Forward link handoff for wireless communication systems with OFDM forward link and CDMA reverse link
EP1659807A1 (en) * 2003-08-29 2006-05-24 Mitsubishi Denki Kabushiki Kaisha Mobile station and communication system
EP1566896A1 (en) * 2004-02-18 2005-08-24 Siemens Aktiengesellschaft Method of communication using a plurality of network transmission antennas
CN1998258A (en) * 2004-08-05 2007-07-11 三菱电机株式会社 Base station, mobile communication terminal device, and primary cell selecting method
US7565110B2 (en) * 2004-09-17 2009-07-21 Alcatel-Lucent Usa Inc. Method for determining rise over thermal for a reverse link in a wireless system
US7889692B2 (en) * 2004-09-30 2011-02-15 Alcatel-Lucent Usa, Inc. Packet error rate estimation in a communication system
US7376102B2 (en) 2005-12-01 2008-05-20 Telefonaktiebolaget Lm Ericsson (Publ) Erased frame and idle frame suppression in a wireless communications system
JP5211740B2 (en) 2008-02-18 2013-06-12 富士通株式会社 Communication method and relay device
CN106533531A (en) * 2016-10-14 2017-03-22 上海微小卫星工程中心 Manmade satellite communication device

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4910794A (en) * 1988-08-04 1990-03-20 Norand Corporation Mobile radio data communication system and method
JP2854346B2 (en) * 1989-09-19 1999-02-03 日本電信電話株式会社 Channel assignment method
US4977612A (en) * 1989-10-10 1990-12-11 Motorola, Inc. Channel selection in a multi-frequency radio data communication system
US5309503A (en) * 1991-12-06 1994-05-03 Motorola, Inc. Dynamic channel assignment in a communication system
JP2616244B2 (en) * 1993-05-18 1997-06-04 日本電気株式会社 Channel allocation method for mobile communication system
US5493563A (en) * 1993-07-26 1996-02-20 Motorola, Inc. Method and apparatus for mobile assisted handoff in a communication system
JP2661533B2 (en) * 1993-12-27 1997-10-08 日本電気株式会社 Channel allocation method for mobile communication system
JP2795151B2 (en) * 1993-12-28 1998-09-10 日本電気株式会社 Multiplexing of system information and voice for simplified mobile phone system
EP0662778B1 (en) * 1994-01-11 2005-10-12 NTT DoCoMo, Inc. Mobile radio communications system
US5469471A (en) * 1994-02-01 1995-11-21 Qualcomm Incorporated Method and apparatus for providing a communication link quality indication
US5491837A (en) * 1994-03-07 1996-02-13 Ericsson Inc. Method and system for channel allocation using power control and mobile-assisted handover measurements
JP2974274B2 (en) * 1994-05-12 1999-11-10 エヌ・ティ・ティ移動通信網株式会社 Transmission power control method and transmission power control device
US5594946A (en) * 1995-02-28 1997-01-14 Motorola, Inc. Method and apparatus for mitigating interference produced by a communication unit in a communication system
US6049535A (en) * 1996-06-27 2000-04-11 Interdigital Technology Corporation Code division multiple access (CDMA) communication system
FI103081B (en) * 1996-02-23 1999-04-15 Nokia Telecommunications Oy Handover in a mobile communication system
JP2980549B2 (en) * 1996-03-19 1999-11-22 エヌ・ティ・ティ移動通信網株式会社 Wired line information transmission method in mobile communication system, base station apparatus and mobile station apparatus
US5886988A (en) * 1996-10-23 1999-03-23 Arraycomm, Inc. Channel assignment and call admission control for spatial division multiple access communication systems
US6151502A (en) * 1997-01-29 2000-11-21 Qualcomm Incorporated Method and apparatus for performing soft hand-off in a wireless communication system
US5987326A (en) * 1997-02-11 1999-11-16 Qualcomm Incorporated Transmit power reduction for a high speed CDMA link in soft handoff
US6104933A (en) * 1997-06-23 2000-08-15 Telefonaktiebolaget Lm Ericsson Method and apparatus for control of base stations in macro diversity radio systems
US5999522A (en) * 1997-11-26 1999-12-07 Motorola, Inc. Method and apparatus for determining hand-off candidates in a communication system

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Publication number Publication date
KR20020030807A (en) 2002-04-25
BR0013604B1 (en) 2013-12-03
WO2001018996A1 (en) 2001-03-15
KR20020029785A (en) 2002-04-19
AU7983100A (en) 2001-04-10
BR0013604A (en) 2002-11-26
CN1385005A (en) 2002-12-11
BR0013572A (en) 2002-04-30
WO2001018991A1 (en) 2001-03-15
JP2003510862A (en) 2003-03-18
CN1373943A (en) 2002-10-09
KR100464470B1 (en) 2005-01-03
AU7129600A (en) 2001-04-10
CN1274160C (en) 2006-09-06
JP4659318B2 (en) 2011-03-30
JP4695803B2 (en) 2011-06-08
JP2003509895A (en) 2003-03-11

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