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
CN101232718AInactive Publication Date: 2008-07-30HUAWEI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HUAWEI TECH CO LTD
Publication Date
2008-07-30
Estimated Expiration
Not applicable · inactive patent

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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.
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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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