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Method for deploying data transmission on forward link and its communication system

A forward link and communication system technology, applied in the field of forward link rate scheduling, can solve the problems of insufficient utilization of forward link capacity in cellular areas, waste of forward link capacity up to 3dB peak reserve, etc., to achieve improved utilization Rate, reduce the effect of transmission delay

Inactive Publication Date: 2007-01-24
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effect of limiting forward link capacity to maintain a predetermined FER is to force the cell to transmit at less than full capacity on average, thereby underutilizing the forward link capacity of the cell
In worst case, up to half of the forward link capacity is wasted to maintain up to 3dB peak headroom

Method used

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  • Method for deploying data transmission on forward link and its communication system
  • Method for deploying data transmission on forward link and its communication system
  • Method for deploying data transmission on forward link and its communication system

Examples

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no. 2 example

[0170] For the second embodiment, the entire data frame is encoded with one set of CRC bits. Preferably, the number of CRC bits is less than the total number of CRC bits used in the first embodiment. In the above example, for 12 code channel frames, the number of CRC bits used is at least 12, but less than 144. Since there are about 12 times more data bits, more CRC bits are required in order to detect frame errors with higher reliability. Assuming that 24 CRC bits make it possible to detect frame errors with the required reliability, the 24 CRC bits can be divided into 12 CRC blocks, where each CRC block contains two CRC bits. A CRC block is appended to each of the 12 data sections. Alternatively, 24 CRC bits may be sent on one code channel frame. At the remote station 6, the data portion and the 24 CRC bits are reprogrammed. Remote station 6 can only determine whether all 12 code channel frames were received correctly. If frame errors are indicated, remote station 6 can...

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Abstract

In a communication system capable of variable rate transmission, scheduling of high speed data transmission improves utilization of the forward link and decreases the transmission delay in data communication. Each remote station (6) is assigned one primary code channel for the duration of the communication with a cell. Secondary code channels of various types and transmission capabilities can be assigned by a channel scheduler (12) for scheduled transmission of data traffic at high rates. Secondary code channels are assigned in accordance with a set of system goals, a list of parameters, and collected information on the status of the communication network. Secondary code channels can be grouped into sets of secondary code channels. Data is partitioned in data frames and transmitted over the primary and secondary code channels which have been assigned to the scheduled user.

Description

technical field [0001] The present invention relates to data communications. In particular, the present invention relates to methods and apparatus for forward link rate scheduling of data transmissions in communication networks. Background technique [0002] State-of-the-art communication systems are required to support various applications. One such communication system is a Code Division Multiple Access (CDMA) system in accordance with the "TIA / EIA / IS-95A Mobile Station-Base Station Compatibility Standard for Dual-Mode Broadband Spread Spectrum Cellular Network Systems" (hereinafter, referred to as for the IS-95A standard). A CDMA system allows voice and data communications between users over terrestrial links. In U.S. Patent No. 4,901,307 (titled "Spread Spectrum Multiple Access Communication System Using Satellite or Terrestrial Repeaters") and U.S. Patent No. 5,103,459 (titled "Used for Generating Waveform The application of CDMA technology in a multiple access comm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/22H04Q7/38H04B7/26H04L29/06H04B7/005H04L29/08H04W28/18H04W28/20H04W28/22H04W52/28H04W52/34H04W72/04H04W72/12
CPCH04W52/343H04B7/2659H04W28/18H04W52/34H04W28/22H04W52/281H04W52/346H04W72/1273H04W72/1252H04W36/18H04W72/06H04W72/563H04W72/52
Inventor 小爱德华·G·蒂德曼林育全周渔君约瑟夫·P·奥登瓦尔德
Owner QUALCOMM INC