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Distance measuring method, equipment and system

A ranging code and wireless system technology, which is applied in the communication between multiple stations, electrical components, radio/inductive link selection and arrangement, etc., can solve the problem of increasing terminal access delay

Inactive Publication Date: 2008-07-30
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0017] 6. The terminal maintains a clock, and the terminal must receive the RNG-RSP before the clock expires
On the contrary, if the CDMA-Allocation-IE is sent after the above RNG-RSP message indicating success, it will increase the unnecessary access delay of the terminal

Method used

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  • Distance measuring method, equipment and system
  • Distance measuring method, equipment and system

Examples

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Embodiment 1

[0035] Referring to Fig. 1, it is a schematic diagram of the signaling process of the Ranging method according to the embodiment of the present invention, including:

[0036] 1. The terminal randomly selects or sends the CDMA code word to the BS according to the negotiated physical resources (such as symbols, sub-channels, CDMA codes, etc.);

[0037] 2. If the BS finds that an adjustment cannot reach the success state, it sends a RNG-RSP message according to the Ranging process in the prior art, and the RNG-RSP message indicates that the Ranging status information is continue;

[0038] 3. The terminal adjusts the corresponding parameters according to the adjustment information in the RNG-RSP message indicating that the status information of Ranging is continue, and then continues to send the CDMA codeword; steps 1 and 2 may be repeated multiple times until the success of Ranging is reached state;

[0039]4. After the BS determines that the success state of Ranging has been re...

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Abstract

The invention discloses a method, a device and a related system for Ranging. When the Ranging comes to a successful condition in the Ranging process, a UL-MAP message indicating the successful condition of Ranging is sent to a terminal and the ranging process continues with the Ranging information. The technical proposal of the invention reduces the messages sent from the terminal of a network in the Ranging process, thus enhancing the bandwidth efficiency.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a ranging (Ranging) method and device in a wireless system and a corresponding wireless access system. Background technique [0002] In a wireless communication system, in order to maintain the quality of the wireless communication link between the terminal and the network, a mechanism is needed to adjust parameters such as the relative time, transmission power, and frequency offset between the terminal and the network. This process is called Ranging. In the Orthogonal Frequency Division MultiAccess (OFDMA) system, there are three kinds of Ranging: [0003] 1) Initial Ranging based on competition; [0004] 2) Periodic Ranging; [0005] 3) Ranging during switching. [0006] The basic difference between the three Ranging methods is that the CDMA codes used come from different sets. [0007] When the initial Ranging is applied to the initial access to the network, t...

Claims

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Application Information

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IPC IPC(8): H04Q7/38H04B7/26H04W24/08
Inventor 梁文亮吴建军
Owner HUAWEI TECH CO LTD
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