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Apparatus and method for providing separate forwand dedicated and shared shared control channels in communications system

A technology for sharing control channels and communication systems, applied in wireless communication, transmission systems, selection devices, etc., can solve the problems of less bits, dependencies, and fewer users

Inactive Publication Date: 2005-02-23
GOOGLE TECHNOLOGY HOLDINGS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Problems caused by this rapid handover include: too few available bits, too few users, too much power, too many reverse link automatic repeat requests (ARQs), and reserved state) and ARQ, relying too much on data channels like shared channel (SHCH 16)
At the same time more bits can be obtained with a large spreading factor by using higher order modulations such as 8PSK, but, again, at the cost of higher transmit power

Method used

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  • Apparatus and method for providing separate forwand dedicated and shared shared control channels in communications system
  • Apparatus and method for providing separate forwand dedicated and shared shared control channels in communications system
  • Apparatus and method for providing separate forwand dedicated and shared shared control channels in communications system

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Embodiment Construction

[0016] Best practice

[0017] The present invention can be more fully understood with reference to Figures 1-5. FIG. 1 illustrates a communication system, generally designated 10, which includes a base station 12 and a mobile unit 14. In the forward link from base station 12 to mobile unit 14, there are shared channel SHCH 16, shared control channel SHCCH 17, and dedicated pointer control channel DPTRCH 18. However, in this system, only the dedicated pointer control channel DPTRCH 18 is continuous, which only allows those mobile units in the working state to use more available Walsh codes, and the mobile units in the working state need to pass the shared control channel SHCCH 17 and forward link channel SHCH 16 are further controlled. The dedicated pointer control channel DPTRCH 18 is used to point to a set of shared control channels SHCCH 17 that supplements the payload of the dedicated pointer control channel DPTRCH 18 in order to convey the allocation on the shared data channel...

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Abstract

Separate forward dedicated and shared control channels are provided in a spread-spectrum communication. The forward dedicated control channel is used to communicate persistent control information and point to the shared control channel when further intermittent control information concerning transmission of data to a mobile station needs to be communicated. The use of a dedicated control channel for only necessary persistent control information, while only pointing to a shared control channel when it is needed, affords more efficient utilization of system resources.

Description

[0001] This application claims the rights of U.S. Provisional Application No. 60 / 197,588 filed on April 17, 2000. Invention field [0002] The present invention relates to an apparatus and method for providing separate dedicated and shared control channels in a communication system (more specifically, in the forward link of a code division multiple access (CDMA) communication system). Background of the invention [0003] Generally, in a communication system, such as CDMA, especially in the development of CDMA technology such as WCDMA, a dedicated channel is required for both data transmission and system control. In the forward link of such a system, a single channel is used to transmit the information to be transmitted and the characteristics of the transmitted information are transmitted on a separate forward control channel. Each of these channels occupies one Walsh code in the limited set of available Walsh codes. In order to keep the system free from Walsh code restrictions, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26H04J11/00H04J13/00H04J13/18H04W48/12H04W72/14
CPCH04W72/14H04W48/12H04B7/2637H04J13/18H04J13/0048H04W72/23H04B7/26H04B1/69
Inventor 罗伯特T·洛夫布赖恩K·克拉松阿米塔瓦·高希卢埃A·贾卢勒马克C·卡达克
Owner GOOGLE TECHNOLOGY HOLDINGS LLC