TDD (Time Division Duplex) transmission method for digital interphone

A digital walkie-talkie, time-division duplex technology, applied in the direction of duplex signal operation, two-way line system station, etc. Take advantage of flexibility, smooth two-way conversations, and frame-drop prevention effects

Active Publication Date: 2013-02-27
SHENZHEN TELETONE INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the voice super-frame transmission idea adopted by them, it takes 10ms or more to realize the switching between sending and receiving. Therefore,

Method used

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  • TDD (Time Division Duplex) transmission method for digital interphone
  • TDD (Time Division Duplex) transmission method for digital interphone

Examples

Experimental program
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Embodiment 1

[0026] like figure 1 As shown, the time division duplex transmission method of the present embodiment uses the burst frame as the basic unit for transmission, including the following steps:

[0027] 1) Enter the sending time slot Slot1 of the burst frame. In the sending time slot Slot1, the host end sends voice or data to the called end, and the called end receives the voice or data sent by the host end;

[0028] 2) Enter the guard time slot G of the burst frame. In the guard time slot G, the sending state of the host end is switched to the receiving state, and at the same time, the receiving state of the called end is switched to the sending state;

[0029] 3) Enter the receiving time slot Slot2 of the burst frame. In the receiving time slot Slot2, the called terminal sends voice or data to the host terminal, and the host terminal receives the voice or data from the called terminal;

[0030] 4) Sending time slot Slot1, guard time slot G and receiving time slot Slot2 constitu...

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PUM

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Abstract

The invention discloses a TDD (Time Division Duplex) transmission method for a digital interphone. In the TDD transmission method, burst frames are used as base units to be transmitted. The TDD transmission method comprises the following steps: 1, entering a sending time slot of one burst frame, and in the sensing time slot, sending voice or data to a called terminal by a host terminal and simultaneously receiving the voice or the data sent by the host terminal by the called terminal; 2, entering a protection time slot of the burst frame, and in the protection time slot, switching a sending state of the host terminal into a receiving state and simultaneously switching a receiving state of the called terminal into a sending state; 3, entering a receiving time slot of the burst frame, and in the receiving time slot, sending voice or data to the host terminal by the called terminal and simultaneously receiving the voice or the data of the called terminal by the host terminal; and 4, after completing one burst period formed by the sending time slot, the protection time slot and the receiving time slot, starting to transmit the next burst frame and returning to the step 1 until the transmission of all voice or data is completed. According to the invention, the bidirectional communication can be completed at the same moment, so that both parties are enable to more smoothly communicate with each other.

Description

technical field [0001] The invention relates to a communication transmission method, in particular to a time division duplex transmission method of a digital walkie-talkie. It belongs to the technical field of wireless communication. Background technique [0002] Time Division Duplex mode (TDD: Time Division Duplexing) is one of the mainstream working modes of the third-generation mobile communication system. road). In the mobile communication system of time division duplex mode, reception and transmission are performed on the same frequency channel, that is, different time slots of the carrier, and guard time is used to separate the reception and transmission channels. In the TDD mode mobile communication system, the uplink and downlink channels use the same frequency, so there is reciprocity between the uplink and downlink channels, which brings many advantages to the TDD mode mobile communication system. [0003] At present, in the field of wireless communication, time...

Claims

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Application Information

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IPC IPC(8): H04L5/14H04Q5/24
Inventor 俞聿光张明韦忠于林胜
Owner SHENZHEN TELETONE INFORMATION TECH
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