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公开(公告)号：WO9921375A3
公开(公告)日：1999-08-19
申请号：PCT/SE9801921
申请日：1998-10-23
Applicant: ERICSSON TELEFON AB L M
Inventor： DAHLMAN ERIK BENGT LENNART , JAMAL KARIM
CPC classification number: H04W74/0833 , H04B7/2637 , H04W28/06
Abstract: A novel format is provided for an uplink common physical channel in a random access mobile communications system, whereby a mobile station transmits a first packet including a predetermined signature pattern (206, 210) in parallel with a second packet including the data part (212, 216, 220) of the random access request. Consequently, in addition to its attendant advantages, the signature part of a random access request can also function as a Pilot by providing additional energy for channel estimation during the data part of the request, while reducing the amount of overhead signalling involved. This additional energy is especially useful for ensuring sufficiently high quality coherent detection of the data part in a rapidly varying radio channel environment.
Abstract translation: 提供了一种用于随机接入移动通信系统中的上行链路公共物理信道的新颖格式，由此移动台与包括数据部分（212,210）的第二分组并行发送包括预定签名模式（206,210）的第一分组， 216,220）的随机访问请求。 因此，除了其伴随的优点之外，随机接入请求的签名部分还可以通过在请求的数据部分期间为信道估计提供额外的能量，同时减少所涉及的开销信令的量，来用作导频。 这种额外的能量对于确保在快速变化的无线电信道环境中的数据部分的足够高的质量相干检测特别有用。
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2.发明申请TRANSMISSION TIMING OFFSET METHOD FOR DS-CDMA MOBILE TELEPHONE SYSTEMS 审中-公开用于DS-CDMA移动电话系统的传输时序偏移方法
公开(公告)号：WO9818217A9
公开(公告)日：1999-05-27
申请号：PCT/SE9701632
申请日：1997-09-26
Applicant: ERICSSON TELEFON AB L M
Inventor： WILLARS PER HANS AAKE , DAHLMAN ERIK BENGT LENNART , JAMAL KARIM
CPC classification number: H04B7/2656 , H04B2201/70706 , H04W52/54
Abstract: A method for altering transmission timings among a plurality of parallel discontinuous transmissions (50) is disclosed. In a DS-CDMA system having a plurality of discontinuous slot-wise transmissions (50), each transmission connection is offset by a predetermined amount in order to generate interference that is evenly spread in time between cells.
Abstract translation: 公开了一种用于改变多个并行不连续传输（50）中的传输定时的方法。 在具有多个不连续的时隙传输（50）的DS-CDMA系统中，每个传输连接被偏移预定量，以产生在小区之间均匀地均匀分布的干扰。
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公开(公告)号：MY123462A
公开(公告)日：2006-05-31
申请号：MYPI9903625
申请日：1999-08-24
Applicant: ERICSSON TELEFON AB L M
Inventor： ESMAILZADEH RIAZ , JAMAL KARIM , ROOBOL CHRISTIAAN
Abstract: A METHOD IS DISCLOSED FOR PROCESSING MOBILE-ORIGINATED RANDOM ACCESS REQUESTS ( RA₁ - RA₄) IN A MOBILE TELECOMMUNICATIONS SYSTEM THAT RANDOMLY SELECTS NEW SIGNATURES (102) FOR RE-TRANSMISSIONS IN THE EVENT THAT COLLISIONS HAVE OCCURED.AS SUCH, THE RANDOM ACCESS RE-TRANSMISSIONS ARE RANDOMIZED OVER THE SIGNATURE DOMAIN INSTEAD OF JUST OVER THE TIME DOMAIN. CONSEQUENTLY, THE DISCLOSED INVENTION SIGNIFICANTLY SHORTENS RANDOM ACCESS DELAYS CAUSED BY COLLISIONS OR ERRONEOUS ARRIVALS AT BASE STATION RECEIVERS, AND ALSO SIGNIFICANTLY REDUCES THE INTERVAL (TD) BETWEEN RANDOM ACCESS RE-TRANSMISSIONS.(FIGURE 8)
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公开(公告)号：MY123293A
公开(公告)日：2006-05-31
申请号：MYPI9904388
申请日：1999-10-12
Applicant: ERICSSON TELEFON AB L M
Inventor： JAMAL KARIM , BUTOVITSCH PAUL , DAHLMAN ERIK BL , ESMAILZADEH RIAZ , WILLARS PER
IPC: H04B1/38 , H04B7/26 , H04L12/56 , H04W8/26 , H04W12/10 , H04W28/04 , H04W56/00 , H04W72/04 , H04W74/00 , H04W74/04
Abstract: IN A COMMUNICATIONS SYSTEM, COMMUNICATIONS RESOURCES ARE ALLOCATED IN A DYNAMIC, ''AS NEEDED" FASHION. NO EXPLICIT SIGNALING IS NEEDED TO EXCHANGE INFORMATION PERTAINING SPECIFICALLY TO AN ALLOCATED COMMUNICATIONS RESOURCE. INSTEAD, RESOURCES ARE IMPLICITLY ALLOCATED BY USING ONE OR MORE PARAMETERS KNOWN TO BOTH THE RADIO ACCESS NETWORK (24) AND MOBILE STATION (30) THAT ARE MORE OR LESS UNIQUE TO THE MOBILE STATION (30). SUCH PARAMETERS ARE USED TO GENERATE OR ADDRESS A COMMUNICATIONS RESOURCE FOR USE BY THE MOBILE STATION (30). THE PARAMETERS MIGHT, FOR EXAMPLE, BE INFORMATION READILY ACQUIRED OR COMMUNICATED AS A RESULT. OF A SYNCHRONIZATION PROCEDURE, A MOBILE STATION REGISTRATION PROCEDURE, A MOBILE STATION ACCESS PROCEDURE, A PAGING PROCEDURE, ETC. EXAMPLE PARAMETERS MAY INCLUDE A SYSTEM FRAME NUMBER, A SYSTEM IDENTIFICATION, A RADIO ACCESS NETWORK IDENTIFICATION, A BASE STATION IDENTIFICATION, A CELL IDENTIFICATION, A MOBILE STATION-ASSOCIATED SIGNATURE, AN ACCESS REFERENCE NUMBER CORRESPONDING TO THE MOBILE STATION (30), A TIME INSTANT WHEN AN ACKNOWLEDGMENT MESSAGE IS RECEIVED, ETC.(FIGURE 1)
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公开(公告)号：DE69723559D1
公开(公告)日：2003-08-21
申请号：DE69723559
申请日：1997-07-22
Applicant: ERICSSON TELEFON AB L M
Inventor： JAMAL KARIM , NYSTROEM JOHAN
Abstract: A method and system for transmitting signals using unequal error protection (UEP). According to the method, symbols having a higher level of coding protection are detected and decoded first, soft reliability information is generated, and then the previously detected symbols and soft reliability information are used to detect and decode symbols having the next lower level of coding protection. The symbols having lower levels of coding protection benefit from the decoding of all previous classes of symbols. Data symbols can be interleaved to further enhance system performance.
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Patent Agency Ranking
公开(公告)号：CA2077269C
公开(公告)日：2003-08-05
申请号：CA2077269
申请日：1992-09-01
Applicant: ERICSSON TELEFON AB L M
Inventor： LARSSON GUSTAV , JAMAL KARIM
Abstract: A method for improving time synchronization of digital data signals in receivers by using more than one known data sequence to provide a plurality of timing recovery functions and based on these, one or more optimal sampling points. By using existing data sequences in each frame, the disclosed method provides improved time synchronization without increasing transmission overhead.
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公开(公告)号：BR9913409A
公开(公告)日：2001-05-22
申请号：BR9913409
申请日：1999-08-31
Applicant: ERICSSON TELEFON AB L M
Inventor： ESMAILZADEH RIAZ , JAMAL KARIM , ROOBOL CHRISTIAAN
Abstract: A method is disclosed for processing mobile-originated random access requests in a mobile telecommunications system that randomly selects new signatures for re-transmissions in the event that collisions have occurred. As such, the random access re-transmissions are randomized over the signature domain instead of just over the time domain. Consequently, the disclosed invention significantly shortens random access delays caused by collisions or erroneous arrivals at base station receivers, and also significantly reduces the interval between random access re-transmissions.
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公开(公告)号：AU5264600A
公开(公告)日：2000-12-28
申请号：AU5264600
申请日：2000-05-30
Applicant: ERICSSON TELEFON AB L M
Inventor： JAMAL KARIM , NYSTROM JOHAN , DAHLMAN ERIK , CHENNAKESHU SANDEEP , ESMAILZADEH RIAZ , LYCKEGARD BO
Abstract: A method for improving the performance of a random access communications system in a variable radio environment is disclosed, whereby at least one valid set of burst signatures is used for transmission by one or more mobile stations. Each set includes at least one signature with a different signature-length than the signatures in other sets. The different signature-lengths can be optimized for the operational environments involved (e.g., longer signatures for slower-moving mobile stations, and shorter signatures for high-speed mobile stations). Alternatively, at least one differentially-encoded signature is used for random access transmissions, in order to reduce the radio channel's sensitivity to large doppler spreads and frequency errors.
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公开(公告)号：BR9812033A
公开(公告)日：2000-09-26
申请号：BR9812033
申请日：1998-08-28
Applicant: ERICSSON TELEFON AB L M
Inventor： JAMAL KARIM , ESMAILZADEH RIAZ , WANG YI PIN ERIC
IPC: H04B1/7073 , H04B1/7075 , H04B1/7083 , H04B7/26 , H04Q7/38 , H04B1/707
Abstract: Each transmission frame within a spread spectrum communications system relating to synchronization code transmission is divided into a plurality of slots. Each of the slots includes a primary (pilot) code +E,ovs c+EE p and a secondary (combined) code +E,ovs c+EE s/lci that includes information identifying or indicative of both a frame timing and a scrambling code for synchronization. This information concerning frame timing and scrambling code may be encoded in the combined code +E,ovs c+EE s/lci itself, as well as in the modulation values of the sequences of plural combined codes within a frame. Alternatively, the information is encoded in the sequence of plural combined codes +E,ovs c+EE s/lci transmitted in each frame, as well as in the modulated values of the sequences of plural combined codes within a frame. As yet another alternative, the information is encoded in the timing of the combined code +E,ovs c+EE s/lci transmission within each slot of the frame relative to its associated primary code +E,ovs c+EE p.
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公开(公告)号：BR9812986A
公开(公告)日：2000-08-08
申请号：BR9812986
申请日：1998-10-23
Applicant: ERICSSON TELEFON AB L M
Inventor： DAHLMAN ERIK BENGT , JAMAL KARIM
Abstract: A novel format is provided for an uplink common physical channel in a random access mobile communications system, whereby a mobile station transmits a first packet including a predetermined signature pattern in parallel with a second packet including the data part of the random access request. Consequently, in addition to its attendant advantages, the signature part of a random access request can also function as a Pilot by providing additional energy for channel estimation during the data part of the request, while reducing the amount of overhead signalling involved. This additional energy is especially useful for ensuring sufficiently high quality coherent detection of the data part in a rapidly varying radio channel environment.
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