A method for simultaneous communication of dmr/pdt terminal equipment on double time slots
A terminal equipment and simultaneous communication technology, applied in wireless communication, synchronization device, connection management, etc. Voice duplex communication services and other problems, to achieve the effect of improving spectrum utilization efficiency
Inactive Publication Date: 2015-07-29
浙江宏睿通信技术有限公司
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[0006] The purpose of the present invention is to aim at existing DMR and PDT wireless terminal products, can't make full use of two independent time slots in double time slot, can't realize the duplex communication business that two-way voice transmits simultaneously in different time slots, can't two The duplex data communication of the independent data service can be carried out in the time slot at the same time, and the two time slots cannot transmit the voice and data services at the same time. method
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[0048] The method for the DMR / PDT terminal equipment of the present invention to communicate simultaneously on double time slots comprises the following steps:
[0049] 1. In the direct mode, the DMR / PDT mobile terminal initiates a communication request in a single time slot in TDMA: the DMR / PDT standard mobile terminal first determines which synchronization state the terminal device is currently processing, these states include unknown state, active transmission state , Passive sending state and passive receiving state, the terminal is generally in an unknown state when it is in standby; then proceed according to the following sub-steps:
[0050] Step 1.1: The terminal device initiates a communication request in an unknown state. First, it detects the synchronization header within the set time. If no synchronization information is detected and the transmission is allowed under the Polite policy, the initiating terminal device will establish a 30ms boundary by itself. The time...
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The invention discloses a method for simultaneous communication between DMR (digital mobile radio) / PDT (portable data terminal) devices in double time slots. The method mainly aims to overcome the shortcoming that another idle time slot cannot be effectively utilized for transmitting voice or data information and control instructions while a time slot is utilized for transmitting voice in a current communication terminal or system in DMR / PDT private network or general communication, the advantage of double time slots of a DMR / PDT system is sufficiently utilized, and purposes of voice duplex and simultaneous transmission of industrial data or control signaling and voice business in the double time slots are achieved. The method has the advantages that functions of voice duplex, data and voice synchronous transmission and the like can be effectively realized, application functions of the DMR / PDT communication system are enriched, and the utilization rate of frequency spectrum resources is effectively increased.
Description
technical field [0001] The invention relates to the field of wireless communication, in particular to a method for solving dual time slots in a DMR / PDT communication system to realize voice duplex and voice data simultaneous interpretation. Background technique [0002] DMR is a European private network communication standard promulgated by the European Telecommunications Standards Institute (ETSI), which adopts a frame structure of double-slot time-division multiple access. The PDT standard is a police wireless trunking standard promulgated by the Ministry of Public Security of the People's Republic of China. This standard is compatible with the DMR underlying protocol, and is an independently innovated and improved wireless trunking standard based on the DMR standards TierI and TierII to enhance security. [0003] DMR / PDT adopts time division multiple access technology, including two identical implementations, each with a length of 30ms, each of which includes a 1.25ms int...
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IPC IPC(8): H04W24/04H04W56/00H04W76/02
Inventor 蔡锦恩谢国军俞峰王志雄陈沪东
Owner 浙江宏睿通信技术有限公司