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Wireless frame transmission method in time division-synchronization code division multiple access system

A technology of synchronous code division multiple access and transmission method, applied in the field of time division-synchronous code division multiple access, can solve problems such as the realization and inapplicability of unfavorable fast call establishment, avoid collision, ensure reliability and effectiveness, shorten the The effect of transit time

Inactive Publication Date: 2008-05-14
CHINA ACAD OF TELECOMM TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] From the point of view of the access process and the structure of the radio frame and the burst, when realizing the scheduling call setup at present, the signaling transmission time required for the dedicated channel (DCH) is at least 10ms, so, from the user initiating the call setup request to the call After the request is processed, a call establishment process requires the interaction of multiple signalings. The air interface signaling transmission time is at least 30ms, which is not conducive to the realization of fast call establishment, especially for dedicated systems that have strict requirements on call establishment time. For example: TD-SCDMA digital trunking system

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  • Wireless frame transmission method in time division-synchronization code division multiple access system
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  • Wireless frame transmission method in time division-synchronization code division multiple access system

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Embodiment Construction

[0025] The basic idea of ​​the present invention is: seven fixed-length service time slots and three special time slots form a 5ms wireless frame to realize the signaling interaction between the user terminal and the network side, and map the TFCI coding sequence into the 5ms wireless frame burst The TFCI field; when transmitting an uplink / downlink burst, the first data block, the training sequence and the second data block are sent in sequence, and the TFCI coded sequence is sent on at least one of the two sides of the training sequence. In this way, the transmission time interval of signaling can be guaranteed to be controlled at 5 ms.

[0026] Here, since the closer the distance to the training sequence is, the more accurate the decoding is, so the TFCI field is generally set on one side or both sides of the training sequence. Therefore, the sending of the TFCI coded sequence on at least one of the two sides of the training sequence may specifically include three steps: way...

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Abstract

The invention discloses a method for transmitting wireless frames in a time diversion-synchronous code division multiple access system, which includes the following steps: seven service slots with a fixed length and three special slots form 5ms wireless frames for interaction between a user terminal and side signaling; an encoding sequence of transmit format combined indicator (TFCI) is mapped on a TFCI field for burst of the 5ms wireless frames; when an uplink / downlink of transmission bursts, a first data block, a training sequence and a second data block are transmitted in order, and the TFCI encoding sequence is transmitted from at least one side in the two sides of the training sequence. By adopting the invention, the transmission time of the signaling is shortened and fast calling is realized.

Description

technical field [0001] The invention relates to time division-synchronous code division multiple access (TD-SCDMA) technology, in particular to a transmission method of wireless frames in the TD-SCDMA system. Background technique [0002] In the TD-SCDMA system, the physical channel adopts a four-layer structure: system frame, wireless frame, subframe and time slot / code. Usually, one radio frame is composed of two subframes, and the length of each subframe is 5ms. In a subframe, there are both uplink time slots (TS) and downlink time slots, including seven fixed-length business time slots, such as figure 1 shown. Among them, TS0 must be used in the downlink direction, and TS1 must be used in the uplink direction, that is, TS0 is fixed as a downlink time slot, TS1 is fixed as an uplink time slot, and the directions of other time slots are variable. In addition to seven business time slots, each subframe also includes three special time slots: DwPTS, UpPTS and GP, such as ...

Claims

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Application Information

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IPC IPC(8): H04B1/707H04B7/26
Inventor 裴小东苏东升王玲
Owner CHINA ACAD OF TELECOMM TECH
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