Encapsulation method for non-real-time service time slots in multi-frequency time division multiple access system
A technology for multi-frequency time division multiple access and non-real-time services, which is applied in time division multiplexing systems, transmission systems, digital transmission systems, etc., and can solve the problems of high complexity of time slot encapsulation technology, many time slot fragments, and indistinguishable services Features and other issues to achieve the effect of reducing the possibility of slot fragmentation, improving overall performance, reducing complexity and calculation load
Inactive Publication Date: 2015-08-19
PLA UNIV OF SCI & TECH +1
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[0024] The purpose of the present invention is to design a low-complexity encapsulation technology suitable for non-real-time business characteristics in view of the problems that the time slot packaging technology in the existing multi-frequency time division multiple access system has high complexity, does not distinguish business characteristics, and generates more time slot fragments. High-degree time slot encapsulation method, which can effectively improve the efficiency of system time slot encapsulation, and can enhance the transmission delay performance of non-real-time service packets
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[0078] The following will be combined with image 3 -9 illustrates the specific technical solutions of the present invention.
[0079] image 3 A scenario where the present invention is applied is given. The system is a broadband satellite communication system based on MF-TDMA system. The system is composed of three parts: service source, user terminal and satellite. The user terminal is composed of a bandwidth management agent, a buffer queue and a packet output dispatching unit. The bandwidth management unit is located on the star and mainly includes two parts: the on-board processing unit and the bandwidth management unit. The packets from the service sources are divided into real-time services and non-real-time services according to different service types, and are cached in the cache queue of the user terminal respectively. The bandwidth management agent generates bandwidth requests according to the received bandwidth allocation information and the current cache queue st...
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The invention discloses a non-real-time service timeslot packaging method for a multi-frequency time division multiple access system. The method includes the steps of timeslot distribution and timeslot packaging. The steps are started in sequence periodically. Timeslot distribution includes steps of bandwidth request list updating and timeslot scheduling. Timeslot packaging includes the steps of bandwidth request aggregation, rotation processing and sequential adaptive timeslot packaging. Complexity and calculation in implementation by the method are lowered greatly, chances that timeslot fragments occur are decreased, and efficiency of system timeslot packaging and transmission delay performance of non-real-time service packets in the system can be improved effectively.
Description
technical field [0001] The invention relates to a time slot encapsulation method in a multi-frequency time division multiple access system, in particular to a time slot encapsulation method for non-real-time services in a multi-frequency time division multiple access system. Background technique [0002] Multi-frequency time division multiple access (MF-TDMA) is a hybrid multiple access method that combines frequency division multiple access (FDMA) and time division multiple access (TDMA). The mainstream multiple access technology used in wireless communication systems such as satellite communications. MF-TDMA divides resources in the time domain / frequency domain in the form of time slots / carriers, allowing many user terminals to share a series of carriers with different rates, and each carrier is used in a time-division manner. Such as figure 1 As shown, the MF-TDMA frame is a two-dimensional matrix of time slots / carriers, where rows represent carriers and columns represe...
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IPC IPC(8): H04J3/16H04L12/917H04L47/76
Inventor 冯少栋李广侠王凡朱勇刚王涵张建照揭晓董飞鸿王平
Owner PLA UNIV OF SCI & TECH