Frequency hopping group call delay adding method suitable for PDT/DMR

A group call and frequency hopping technology, applied to electrical components, transmission systems, etc., can solve the problems of frequency hopping related business implementation restrictions

Active Publication Date: 2021-04-30
HEBEI FAREAST COMM SYST ENG
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Problems solved by technology

The technical difficulty of introducing frequency hopping into a relatively complete communication protocol is mainly to follow the original communication standard to the ...

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  • Frequency hopping group call delay adding method suitable for PDT/DMR
  • Frequency hopping group call delay adding method suitable for PDT/DMR
  • Frequency hopping group call delay adding method suitable for PDT/DMR

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Embodiment Construction

[0027]In order to make the above objects, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It will be appreciated that the specific embodiments described herein are for explaining the present application, not the limitation of the present application. It will also be also to be noted that in order to facilitate the description, only parts associated with the present application rather than all structures.

[0028]An additional method for jump groups for PDT / DMR, including the following steps:

[0029]Step 1: After the hopping group call service initiated by the call, the transmitter will alternately embed the embedded information field of partial subframes that pass through the link encoded frequency hopping synchronization information and link control signaling into the partial subframe of the voice superframe. Superframe carrying the frequency hopping...

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Abstract

The invention discloses a frequency hopping group call delay adding method suitable for PDT/DMR, and belongs to the technical field of wireless communication. After a calling party initiates establishment of a frequency hopping group calling service, a transmitting party alternately embeds frequency hopping synchronization information subjected to link coding and link control signaling into an embedded information domain of a part of subframes of a voice superframe; after the equipment which is not in the group calling service is transferred to the group, the equipment is in a slow scanning state on the service frequency point sequence; after receiving the complete service superframe, the receiver firstly determines a burst position according to a synchronization word in the service superframe, and then extracts frequency hopping synchronization information embedded into the voice sub-frame; the receiver shifts to a synchronous following hopping state according to the frequency hopping synchronization information to realize synchronous receiving; and after the superframe carrying the link control signaling is synchronously received, the group call service is added according to the information in the link control signaling. According to the invention, on the basis of not changing PDT/DMR communication system air interface waveform, a frequency hopping group call delay adding function can be realized.

Description

Technical field[0001]The present invention relates to the field of wireless communication technology, and more particularly to a hopping group on which PDT / DMR is used.Background technique[0002]With the development of communication technology, wireless communication equipment greatly facilitates people's daily life and work, especially mobile terminal equipment, not only in personal life, but also the needs of wireless communication equipment is more extensive. For example, rail transit, security, public security, emergency and other industries have a more special demand for special wireless communication equipment.[0003]At present, private network wireless communication devices usually use fixed frequency communication, the disadvantage of communication is poor, susceptible to natural interference such as noise, multi-user interference, and some frequency band interference, multi-frequency continuous wave interference, etc. interference.[0004]In order to improve the anti-interfer...

Claims

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Application Information

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IPC IPC(8): H04B1/713H04B1/7156
CPCH04B1/713H04B1/7156
Inventor 康志杰白清张松轶李鹏张成斌王嘉伦立宝张万鹏许聪聪路雪森庞欢赵志强李怀禄
Owner HEBEI FAREAST COMM SYST ENG
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