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Closed loop resource allocation in high speed wireless communications network

A technology of initial rate, busy tone signal, applied in wireless communication, network traffic/resource management, radio/induction link selection and arrangement, etc.

Inactive Publication Date: 2002-10-30
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the communication load and spare capacity of all base stations involved in the soft handover (called base stations in the working group) must be taken into account, possibly again minimizing the signaling in the network
Yet another fundamental issue is the protection of base stations that will not soft hand off to a particular subscriber station unless connected to the subscriber station by an electromagnetic link with path losses comparable to those measured in the working group

Method used

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  • Closed loop resource allocation in high speed wireless communications network
  • Closed loop resource allocation in high speed wireless communications network
  • Closed loop resource allocation in high speed wireless communications network

Examples

Experimental program
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Embodiment Construction

[0030] 1. Method overview

[0031] Figure 1A is a flowchart describing a preferred method of performing closed-loop resource allocation in accordance with the present invention. Those skilled in the art can understand Figure 1A The steps illustrated in do not represent a preferred sequential sequence and the order of the steps may be changed without departing from the scope of the invention. Furthermore, the steps of the present invention can be completely eliminated without departing from the scope of the present invention. In the exemplary embodiment, the invention is used to determine the data rate for reverse link transmissions from subscriber stations. In block 100, the subscriber station selects an initial desired rate (R step1 ). In the exemplary embodiment, the data rate is determined on a per packet basis.

[0032] Figure 1B is a flow chart that describes in more detail rate selection based on buffer status. In block 110, the subscriber station determines t...

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Abstract

Method and apparatus for performing transmission data rate allocation in a high speed wireless communications network. A macro control loop with the network of base stations on one side and all the subscriber stations on the other side. Subscriber station selects a rate based on the amount of data queued for transmission (100). Adjusts this rate based on the available power headroom of the subscriber station (102). This adjusted transmission rate is then adjusted again to account for protection of base stations in the candidate set of the subscriber station (104). This rate is then adjusted in accordance with busy tone signals indicative of the loading conditions of active set base stations of the subscriber station (108). The base stations react to these action by refreshing measurements of their instantaneous traffic load and providing feedback in the form of soft busy tones. The algorithm is named Closed Loop Resource Allocation.

Description

technical field [0001] The present invention relates to wireless communications. More particularly, the present invention relates to a novel and improved method and apparatus for determining the transmission data rate in a high speed wireless communication system. Background technique [0002] Modern communication systems need to support a variety of applications. One such communication system is the Code Division Multiple Access (CDMA) system, which complies with the "TIA / EIA / IS-95 Subscriber station-Base Station Compatibility Standard for Dual-Mode Wideband Spread Spectrum Cellular System", hereafter referred to as the IS-95 standard . The CDMA system allows voice and data communication between users over terrestrial links. The use of CDMA technology in multiple access communication systems is described in U.S. Patent No. 4,901,307, entitled "SPREAD SPECTRUM MULTIPLE ACCESS COMMUNICATION SYSTEM USING SATELLITEOR TERRESTRIAL REPEATERS", and U.S. Patent No. 5,103,459, ent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04L1/00H04W28/22H04W36/18H04W52/26H04W52/34H04W52/40
CPCH04B2201/70705H04L1/0002H04W28/22H04W36/18H04W52/26H04W52/267H04W52/343H04W52/367H04W52/40H04W72/04H04W72/02H04W72/0473
Inventor G·E·克拉扎
Owner QUALCOMM INC
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