Pattern-based time division duplex/time division multiple access channel planning frame coding method

Abstract

The invention discloses a pattern-based time division duplex / time division multiple access channel planning frame coding method, which mainly solves the problem of low coding efficiency of a conventional channel planning frame coding method. The method comprises the following steps of: (1) setting network nodes; (2) dividing a planning cycle; (3) distributing time slots in the planning cycle by a central node to obtain a distribution result of the time slots in the planning cycle; (4) generating uplink and downlink node patterns according to the time slot distribution result; (5) defining P code words according to the purposes of the time slots, and coding the P code words; and (6) generating uplink and downlink time slot mapping patterns according to the time slot distribution result, and combining the uplink and downlink node patterns with the uplink and downlink time slot patterns to complete planning frame coding. The method has the advantages of low planning frame coding length, low overhead of transmission of planning frames in a channel, high utilization rate of the channel and low requirement on equipment, and can be applied to the field of various local area networks and access networks adopting time division duplex / time division multiple access communication.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a channel planning frame coding method, which can be applied to the fields of various local area networks and access networks adopting time division duplex / time division multiple access communication. Background technique [0002] In the local area network and access network based on shared media, in order to realize the reasonable and conflict-free allocation of channel resources, a logical topology structure from one central point to many points is often adopted. In this network structure, there is a central node that uniformly allocates the use of channel resources, and other nodes except the central node are called slave nodes. Data communication can be directly performed between the central node and the subordinate nodes, and the communication between the subordinate nodes generally needs to be forwarded by the central node. In order to better provide quality of service...

AI Technical Summary

Problems solved by technology

[0006] In the local area network and access network, usually the number of time slots and nodes is large, and the code length of the planning frame will be very long at this time, and the planning frame needs to be transmitted in the time slot in the cycle, so the transmission planning frame occupies The time slot increases, resulting in a decrease in the time slot for transmitting valid data frames, which ultimately leads to a decrease in channel utilization

For example, suppose there are 64 slave nodes in the network, and each planning cycle includes 150 fixed-length time slots, that is, N=64, K=150. In the slot-based encoding method, 900 bits are required to encode the planning frame ; In the node-based coding method, 512 bits are needed to code the planning frame. It can be seen that the coding length of the planning frame generated by these two coding methods is very long, and in actual situations, each time slot has multiple purposes, except Data transmission can also be used to transmit a variety of control frames, switch frame intervals, and serve as idle time slots. If these different functions are reflected in the planning frame, the coding length of the planning frame may be longer, resulting in channel utilization further reduction of

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