专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

EP1161809A1 CELL DISCARD NOTIFICATION 有权
标题翻译：细胞MESSAGE消除
公开(公告)号：EP1161809A1
公开(公告)日：2001-12-12
申请号：EP00919215.4
申请日：2000-03-17
申请人： Telefonaktiebolaget L M Ericsson (Publ)
发明人： LAZRAQ, Tawfik , KHAN, Farooq
IPC分类号： H04L1/18
CPC分类号： H04L1/1877 , H04L1/1809
摘要： An algorithm complementary to the Selective Repeat ARQ technique is provided, that allows obsolete or otherwise superfluous packets to be safely discarded at the transmitter when using the Selective Repeat ARQ technique. Thus, clogging of ARQ buffers and deadlocking of the system can be avoided, and data transfer in mobile wireless environments using Selective Repeat ARQ can be made more efficient. In accordance with various embodiments of the algorithm, a cell discard notification (CDN) message is sent by the transmitter to the receiver to indicate to the receiver which cells or packets the transmitter has discarded, so that the receiver need no longer expect to receive them. The CDN message can be sent when the transmitter discards cells or packets. The CDN message can also be sent in response to a communication such as a request or negative acknowledgment that is sent by the receiver to the transmitter.

2. 发明公开

EP1133848A1 BANDWIDTH EFFICIENT ACKNOWLEDGEMENT/NEGATIVE ACKNOWLEDEGMENT 审中-公开
标题翻译：带宽有效的确认/否认
公开(公告)号：EP1133848A1
公开(公告)日：2001-09-19
申请号：EP99963752.3
申请日：1999-11-24
申请人： Telefonaktiebolaget L M Ericsson (Publ)
发明人： KHAN, Farooq , JÄVERBRING, Stefan , FURUSKÄR, Anders , WALLMAN, Mattias
IPC分类号： H04L1/18
CPC分类号： H04L1/1809 , H04L1/1614 , H04L1/1621
摘要： A method and technique are provided for efficiently acknowledging transmitted information in a system that employs variable rate data transmission, and skips data block sequence numbers depending on the transmission rate used. An RBB field in an ACK/NACK message includes a starting sequence number, an indication of a sequence number step, and a bitmap. The starting sequence number indicates a first block in a series or sequence of transmitted blocks that are being acknowledged via the ACK/NACK message. The sequence number step indicates a minimum difference between sequence numbers of blocks in the sequence. Where the sequence is ordered, the sequence number step is a difference between the sequence numbers of adjacent or consecutive blocks in the series. The bitmap is configured so that each bit in the bitmap represents an acknowledgment of one of blocks in the series. The RBB field can also include multiple starting sequence numbers, and both a sequence number step and a length for each starting sequence number. Each set of starting sequence number, sequence number step and length indicates a subseries or subsequence of the series of transmitted blocks that is being acknowledged via the ACK/NACK message. The starting sequence number indicates a sequence number of a first block in the subsequence, the length indicates how many blocks are in the subsequence, and the sequence number step indicates a difference between sequence numbers of adjacent blocks in the subsequence.

3. 发明公开

EP1123594A1 CODE ALLOCATION IN CDMA 审中-公开
标题翻译：分配在CDMA码的
公开(公告)号：EP1123594A1
公开(公告)日：2001-08-16
申请号：EP99970809.2
申请日：1999-10-15
申请人： Telefonaktiebolaget L M Ericsson (Publ)
发明人： MAGNUSSON, Sverker , BEMING, Per , PERSSON, Magnus , KHAN, Farooq
IPC分类号： H04J11/00 , H04B7/26
CPC分类号： H04J13/20 , H04B7/2628 , H04J13/0044
摘要： In spread spectrum communications, a method for allocating and re-allocating channelization codes to new and existing channels in a way that makes the maximum number of codes available at a given time for channels of different rates and different spreading factors. If re-allocations are not performed, a communication system employing the invention has a higher capacity than a system employing a random allocation strategy. The invention also reduces signaling overhead for re-allocations in comparison to a random allocation strategy because fewer re-allocations are necessary.

4. 发明授权

EP1123602B1 COMBINED HYBRID AUTOMATIC RETRANSMISSION REQUEST SCHEME 有权
标题翻译：联合混合模型的自动变速器AUFORDERUNG REPEAT
公开(公告)号：EP1123602B1
公开(公告)日：2011-09-07
申请号：EP99965612.7
申请日：1999-10-22
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： NYSTRÖM, Johan , FURUSKÄR, Anders , JÄVERBRING, Stefan , KHAN, Farooq
IPC分类号： H04L1/18
CPC分类号： H04L1/1607 , H04L1/0059 , H04L1/0069 , H04L1/1816 , H04L1/1819 , H04L1/1845 , H04L1/188
摘要： A transmitter operates using a scheme that allows receivers using either Type I Hybrid ARQ or receivers using Type II Hybrid ARQ to successfully receive and decode blocks from a common transmitter without the need for the transmitter be informed of which scheme is being employed by the receivers.

5. 发明公开

EP1123602A1 COMBINED HYBRID AUTOMATIC RETRANSMISSION REQUEST SCHEME 有权
标题翻译：联合混合模型的自动变速器AUFORDERUNG REPEAT
公开(公告)号：EP1123602A1
公开(公告)日：2001-08-16
申请号：EP99965612.7
申请日：1999-10-22
申请人： Telefonaktiebolaget L M Ericsson (Publ)
发明人： NYSTRÖM, Johan , FURUSKÄR, Anders , JÄVERBRING, Stefan , KHAN, Farooq
IPC分类号： H04L1/18
CPC分类号： H04L1/1607 , H04L1/0059 , H04L1/0069 , H04L1/1816 , H04L1/1819 , H04L1/1845 , H04L1/188
摘要： A transmitter operates using a scheme that allows receivers using either Type I Hybrid ARQ or receivers using Type II Hybrid ARQ to successfully receive and decode blocks from a common transmitter without the need for the transmitter be informed of which scheme is being employed by the receivers.

6. 发明公开

EP1123601A1 ARQ PROTOCOL WITH PACKET-BASED RELIABILITY LEVEL SETTING 有权
标题翻译：与基于分组的信赖度设定ARQ协议
公开(公告)号：EP1123601A1
公开(公告)日：2001-08-16
申请号：EP99952543.9
申请日：1999-10-08
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (publ)
发明人： RATHONYI, Bela , KHAN, Farooq , LUDWIG, Reiner
IPC分类号： H04L1/18 , H04L1/00
CPC分类号： H04L1/007 , H04L1/0006 , H04L1/0009 , H04L1/1614 , H04L1/1635 , H04L1/187 , H04L1/1874
摘要： A communication device and method is provided, for which, when having implementations of first protocol that specifies different reliability levels for sending PDUs of a second protocol, where the second protocol specifies segmentation of PDUs of a third, higher layer protocol, a capability is introduced for setting the reliability level of second protocol (L2_ARQ) PDUs differently for second protocol PDUs belonging to a defined data structure containing such second protocol (L2_ARQ) data units. The defined data structure can be a higher layer protocol data unit or the send window. Thereby the delay caused by retransmission of second protocol data units can be reduced significantly.

7. 发明公开

EP1119936A1 DATA COMMUNICATION METHOD AND SYSTEM USING AN ADAPTIVE HYBRID-ARQ SCHEME 审中-公开
标题翻译：数据传输系统和自适应混合ARQ方法程序
公开(公告)号：EP1119936A1
公开(公告)日：2001-08-01
申请号：EP99956447.9
申请日：1999-10-08
申请人： Telefonaktiebolaget L M Ericsson (Publ)
发明人： KHAN, Farooq , OLOFSSON, Haakan , FURUSKÄR, Anders , HÖÖK, Mikael
IPC分类号： H04L1/18
CPC分类号： H04L1/1628 , H04L1/0001 , H04L1/1671 , H04L1/1819 , H04L1/1845
摘要： Hybrid ARQ techniques for error handling are described. The amount of redundancy transmitted in response to a first NACK message associated with a first attempt to decode a data block is variable. The number of redundancy units transmitted (and/or requested) can be selected based on various criteria including, for example, estimated channel quality, estimated block quality, memory usage, a number of outstanding blocks, etc.

8. 发明公开

EP1103113A1 GROUP ADDRESSING IN A PACKET COMMUNICATION SYSTEM 审中-公开
标题翻译：分组通信系统中的分组寻址
公开(公告)号：EP1103113A1
公开(公告)日：2001-05-30
申请号：EP99943560.5
申请日：1999-08-06
申请人： Telefonaktiebolaget L M Ericsson (Publ)
发明人： KHAN, Farooq , LARSSON, Johan , TURINA, Dalibor , DE VERDIER, Lisa
IPC分类号： H04L1/18
CPC分类号： H04L1/1819 , H04L1/0068 , H04L1/0083 , H04L1/1642 , H04L1/1809
摘要： A radiocommunication system supports forward error correction (FEC)/automatic retransmission (ARQ) schemes for handling erroneously received data blocks. Transmission of sequence numbers associated with each data block are transmitted independently of the data blocks themselves, which results in, among other benefits, reduced latency and improved memory utilization. By decoupling transmission of the payload data from the block and sub-block identity, a more robust variable redundancy scheme is created. For example, a group of block sequence numbers can be transmitted together as a bit map, whereby individual sequence numbers need not be completely specified. Instead, a starting sequence number can be completely specified, with additional sequence numbers then being represented by subsequent offsets or increments from the starting sequence number.
摘要翻译：无线电通信系统支持用于处理错误接收的数据块的前向纠错（FEC）/自动重传（ARQ）方案。与每个数据块相关联的序列号的传输独立于数据块本身而被传输，这除了其他优点之外还导致延迟减少和存储器利用率提高。通过将有效载荷数据与块和子块身份的传输解耦，创建更强健的可变冗余方案。例如，一组块顺序号可以作为位图一起传送，由此不需要完全指定单独的顺序号。相反，可以完整地指定起始序列号，其中附加的序列号随后由起始序列号的后续偏移量或增量表示。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式