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Confirming method for controlling frequency point access time of day in non-center system

A technology that connects to the central system at the moment of access, and is applied in the direction of communication between multiple stations. It can solve problems such as control without a central node, and achieve the effects of improving work efficiency and avoiding conflicts and collisions.

Active Publication Date: 2008-01-23
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] At present, in the existing digital centerless communication system, there is no central node control, and direct communication between terminals can be realized

Method used

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  • Confirming method for controlling frequency point access time of day in non-center system
  • Confirming method for controlling frequency point access time of day in non-center system
  • Confirming method for controlling frequency point access time of day in non-center system

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Embodiment Construction

[0010] Firstly, it should be pointed out that the said digital centerless communication system of the method of the present invention is realized based on a TDD (D-time division duplex) digital communication system, and the system has a certain time slot structure. During the entire communication process, the receiving and transmitting stations always occupy a specific time slot on a certain frequency point for communication. After measuring and selecting a service frequency point and time slot, the calling station is ready to initiate a call. When initiating a call, the control frequency will be occupied. The present invention provides a method to make the calling station occupy the control frequency point at an appropriate time, which not only facilitates the synchronization between the calling station and the called station, but also avoids collisions with other stations as much as possible.

[0011] The present invention will be described in further detail below in conjun...

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Abstract

The present invention discloses a method to confirm control frequency point access time in a centreless system including procedures below: Procedure I. Firstly, state of a service frequency point is detected with selected channels marked with A and B; Procedure II. It is necessary monitor whether other broadcasting stations are operating on the control frequency point and judge whether the channel A and channel B are stipulated by other broadcasting stations. If the channel A and channel B are stipulated, please turn to procedure I. As for the channel A and channel B stipulated and unused on the control frequency point, please go to procedure; III. Otherwise, turn to procedure IV; Procedure III. If the control frequency point is not used, a primary call is realized; Procedure IV. As for the control frequency point in operation, please judge whether the channel A serves as a service channel. If yes, the channel B is stipulated as a service channel. If not, please reserve the channel A and turn to procedure V; Procedure V. As other broadcasting stations operate on the control frequency point, wait for a time slot T at random and go to procedure II. The present invention can not only realize synchronization between a calling and a called broadcasting station and avoid collision with other broadcasting stations.

Description

technical field [0001] The present invention relates to a wireless communication system, relates to a scheme for realizing time synchronization of business channels, synchronization channels, paging channels, control channels, etc. Determine the method. Background technique [0002] At present, in the existing digital centerless communication system, there is no control of the central node, and direct communication can be realized between terminals. In a centerless communication system, the design of the structure, synchronization agreement, call signaling process, and terminal status will affect the performance of the entire system; and the control frequency point carries a public channel, and the station must follow a certain random access protocol in order to effectively avoid collision. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for determining the access time of the control frequency point in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26
Inventor 张严李夏邓红超林敬东
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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