Framing synchronous processing method of inserting channel

A technology for synchronization processing and channel access, applied in synchronization devices, wireless communication, multiplexing communication, etc. The effect of easy access, prolonging service life and reducing difficulty

Inactive Publication Date: 2003-11-19
BEIJING XINWEI TELECOM TECH
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Problems solved by technology

In the SCDMA wireless communication system, since terminals at different locations do not know the distance between themselves and the nearest base station, when sending an access request to the base station, the signaling information in the access channel is transmitted asynchronously, which will cause It i

Method used

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  • Framing synchronous processing method of inserting channel
  • Framing synchronous processing method of inserting channel
  • Framing synchronous processing method of inserting channel

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Embodiment Construction

[0024] The wireless channel has N code channels, including M access channels and N-M traffic channels (N=32 or 64; M=1 or 2), and the code channel allocation has 32 code channels at N=32 When , since the PSTN access terminal of the system can access 30 code channels, the above code channel allocation is feasible. There can be 1 or 2 access code channels, that is, M=1 or 2. The code channels are distinguished by pseudo-random sequences, so here we use two access code channels and choose WALSHO and WALSH17 with better synchronization to distinguish the two access code channels. If the number of users is large and there are stricter requirements on the number of service channels, one access code channel can be selected, that is, M=1, and WALSHO with good synchronization is used to distinguish the access code channels.

[0025] In Figure 1a, G represents the guard time slot, because it takes a certain amount of time to switch between sending and receiving, and the terminal does n...

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Abstract

When a terminal launches an access request to the base station, the signaling information in the access channel is asynchronous transferred i.e. asynchronous access is SCDMA communication system. The method uses synchronous access instead asynchronous access, that is to say the original access frame is sent in two parts in sequences: the access information and the signaling information. The terminal sends the access information first. Then, with the holding control command from the base station being received, the terminal sends the access signaling information at next frame in order to complete the synchronous access.

Description

technical field [0001] The invention relates to a synchronous code division multiple access (SCDMA) communication system of wireless communication, in particular to a frame-divided synchronous processing method of an access channel of the SCDMA communication system. Background technique [0002] In the patent No. 97118934.X, the patent titled "Synchronous Code Division Multiple Access Communication Link Establishment and Maintenance Method" describes an access technology, which illustrates the channel access method in the SCDMA system. In the exemplary embodiment described in this patent, the access request signal and the signaling signal for accessing the channel are sent as one frame. In the SCDMA wireless communication system, since terminals at different locations do not know the distance between themselves and the nearest base station, when sending an access request to the base station, the signaling information in the access channel is transmitted asynchronously, which...

Claims

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Application Information

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IPC IPC(8): H04W56/00H04B7/00H04B7/26
Inventor 孙平蒋伯峰李日光袁进金晶林波
Owner BEIJING XINWEI TELECOM TECH
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