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Ranging method and bandwidth request ranging method

A bandwidth request and ranging code technology, applied in electrical components, time-division multiplexing systems, multiplexing communication, etc., can solve the problem of not being able to apply random access channels, etc., and achieve the effect of reducing the total time delay

Active Publication Date: 2011-11-16
HFI INNOVATION INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this ranging procedure, when the contention result is not processed, the user terminal still waits for the timer to expire
Moreover, such a differential random access mechanism cannot be applied to random access channels with the same transmission priority, such as a ranging channel for initial ranging

Method used

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  • Ranging method and bandwidth request ranging method
  • Ranging method and bandwidth request ranging method
  • Ranging method and bandwidth request ranging method

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Embodiment Construction

[0052] The following is a detailed description of preferred embodiments of the present invention according to several drawings.

[0053] Figure 8 It is a conceptual schematic diagram of a novel contention-type code division multiple access (Code Division Multiple Access, CDMA) ranging using a fast feedback mechanism. The contention-based CDMA ranging is applied to the IEEE802.16 wireless communication system (ie, the wireless communication system 11), in which the user terminal transmits a ranging code that can be used for multiple purposes to the base station on a shared ranging channel. exist Figure 8 In the example shown, each user terminal (from SS1 to SS6) initiates the ranging procedure, uses a randomly selected ranging opportunity and ranging code in the previous uplink frame (ULi), and uploads the ranging opportunity in the previous uplink frame (ULi). Send the ranging code. The base station BS transmits an acknowledgment message (ACK) or accepts a status report in ...

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Abstract

The invention provides a ranging procedure and a bandwidth request ranging procedure. The ranging procedure includes: in a radio communication system, sending a ranging code on a ranging opportunity in a previous frame from a mobile station for competitive resource access; receiving first conformation information from a base station in a subsequent frame to respond the ranging opportunity; sending request information to the base station after the ranging code is successfully coded by the base station; and receiving second conformation information from the base station to respond the request information. By using the invention, when ranging collision or failure occurs, upon receiving the reception status report, a subscriber terminal will proceed with the next round of contention without continuing wait for the entire timeout period. As a result, the total latency due to the ranging collision or failure is reduced.

Description

[0001] Cross References to Related Applications [0002] This application claims prior application under Section 119 of the United States Patent Act to U.S. Provisional Patent Application No. 61 / 050,280, filed May 5, 2008, entitled "Collision Detection and Fast Feedback for Competitive OFDMA Ranging" rights, this patent application is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to wireless network communications, and more particularly to contention-based ranging procedures. Background technique [0004] FIG. 1 is a competitive CDMA ranging (CDMA ranging) procedure in the prior art. As shown in Figure 1, in the CDMA ranging procedure, each subscriber station (Subscriber Station, SS) randomly selects a CDMA ranging code from a predefined code pool (code pool), and selects a CDMA ranging code from a limited number of ranging slots. The ranging slot is randomly selected in (rangingslot), and the ranging code is trans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/00
CPCH04W74/008H04J3/0682H04W74/002
Inventor 周照钦陈义升傅宜康
Owner HFI INNOVATION INC