Digital trunk system data frame dynamic buffer processing method

Abstract

The invention discloses a digital trunk system data frame dynamic buffer processing method, solves the problem of contradiction between time delay of upper data transmission and processing and strict digital trunk air interface timing, and belongs to the field of wireless communication. According to the method, a channel machine performs statistics of the time delay of upper data transmission and processing in real time, and the time delay is regarded as the parameter to calculate and obtain an expected quantity of data frames in a dynamic buffer pool. When the actual quantity of the data frames in the dynamic buffer pool is equal to the expected quantity, the quantity of the data frames in the dynamic buffer pool is unchanged; when the actual quantity of the data frames in the dynamic buffer pool is smaller than the expected quantity, the quantity of the data frames in the dynamic buffer pool is increased; when the actual quantity of the data frames in the dynamic buffer pool is larger than the expected quantity, the quantity of the data frames in the dynamic buffer pool is reduced; in this way, in the condition that the time for air interface data sending is strictly controlled, the data transmitted from the upper layer can be accurately arranged in corresponding time slots to be transmitted.

Description

technical field [0001] The invention belongs to the field of wireless communication, in particular to a method for dynamically buffering and processing data frames of a digital trunking system. Background technique [0002] The digital trunking channel machine system is a digital trunking wireless access system that complies with China's national standard for digital trunking. The system is suitable for industrial wireless private networks, including rail transit, electric power, ports, airports, government, military, etc. The digital trunking channel machine system realizes wireless access functions such as protocol stack physical layer, MAC layer, radio frequency transceiver, etc., and also provides local and remote management functions. When the connection with the switching center is disconnected, it can support basic registration, call and short message services within the coverage of the system. The system supports clock synchronization methods such as GPS and IEEE15...

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Problems solved by technology

[0004] Since the digital trunking uses TDMA technology, the data needs to be sent out in fixed time slots. The time of each time slot is fixed, but there is a certain delay in the transmission and processing of upper layer data, and this time is not Fixed, this leads to the fact that the data sent by the upper layer may arrive early or be delayed. If it is delayed, it will miss the time slot it needs to carry, and can only wait until the corresponding time slot of the next frame before sending

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