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Method and apparatus for detecting an uplink packet data channel in a CDMA wireless communications system

一种分组数据信道、检测装置的技术，应用在使用信号质量检测器进行错误检测/预防、使用返回通道进行错误预防/检测、传输系统等方向，能够解决链路容量减少等问题

Inactive Publication Date: 2005-11-09
LUCENT TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To achieve this, the PDCCH power needs to be at a sufficiently high level, which, as mentioned earlier, results in a reduction in uplink capacity

Method used

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  • Method and apparatus for detecting an uplink packet data channel in a CDMA wireless communications system
  • Method and apparatus for detecting an uplink packet data channel in a CDMA wireless communications system
  • Method and apparatus for detecting an uplink packet data channel in a CDMA wireless communications system

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Embodiment Construction

[0020] Reference is made to the block diagram in Figure 1 which illustrates prior art uplink high speed PDCH processing according to the 3GPP2 standard. At the mobile terminal transmitter 101 , data packets at the input 102 to be transmitted via the PDCH uplink to the base station receiver 103 are processed by a CRC calculation and attachment device 104 . Based on an input data packet, device 104 appends CRC bits to bits in the data packet, and the resulting bits are encoded by turbo encoder 105, which is a device well known in the art. An interleaver 106 interleaves the encoded data against correlated fading channels, and a subpacket shaper 107 reorganizes the interleaved data into three subpackets. The bits in each subpacket are sufficient to allow the receiver at input 101 to reconstruct the data packet. Once the data packet size is known, the rules for forming subpackets for each incoming data packet are known to the mobile terminal transmitter 101 and base station receiv...

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Abstract

At a base station receiver in a CDMA wireless communications system, in order to reduce reliance on the parameter values transmitted on a packet data control channel (PDCCH) to properly detect the high speed packet data transmitted on a packet data channel (PDCH) with which the PDCCH is code-division-multiplexed, data detection is performed using different possible values for at least one of the parameters and determining if a data packet derived from the PDCH detected under the different values produces a detected data packet that passes a CRC check. If a data packet derived from the received PDCH using a possible parameter value passes the CRC check, then the data packet is delivered to the output and an ACK is transmitted back to the transmitting mobile terminal.

Description

technical field [0001] The present invention relates to wireless communications, and more particularly to detection at a base station of a high speed packet data channel transmitted by a mobile terminal on the reverse link. Background technique [0002] Mobile terminals compliant with the latest 3GPP2 CDMA2000-1x EVDV standard (RevD) support high-speed uplink data transmission that allows partial retransmission of transmitted data packets at the physical layer, as opposed to performing retransmission at higher layers which results in greater delay. Pass the previous version of the decision. According to these latest standards, high-speed data transmission from mobile terminals occurs on a packet data channel (PDCH), which is code-division multiplexed with a packet data control channel (PDCCH) and a pilot channel (PICH) for uplink transmission to the base station . In a mobile terminal, cyclic redundancy check (CRC) bits are appended to the data packets to be transmitted. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04W28/00H04W28/04
CPCH04L1/1819H04L1/1845H04L1/20H04B1/69
Inventor 弗朗西斯·多米尼克孔红卫艾苏克·A.·蒂库
Owner LUCENT TECH INC
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