Medium access control (MAC) method and device of multirate cooperation
A medium access control, multi-rate technology, used in error prevention/detection using return channels, digital transmission systems, electrical components, etc. It can solve large transmission delays, reduce data transmission delays, multi-channel resources, etc. problem, to achieve the effect of ensuring validity and shortening transmission delay
Inactive Publication Date: 2014-04-02
BEIHANG UNIV
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Although this method effectively guarantees the validity of the data packet received by the receiving node, since all intermediate nodes that meet the conditions participate in the cooperation until the receiving node sends an acknowledgment (ACK) packet, it is different from the cooperative MAC method initiated by the sending node and the Compared with the cooperative MAC method initiated by the cooperative node, it will occupy more channel resources and generate greater transmission delay
[0007] In short, the existing cooperative MAC method cannot guarantee the validity of data transmission and reduce the delay of data transmission.
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[0063] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0064] figure 1 It is a flowchart of a multi-rate cooperative MAC sending method according to an embodiment of the present invention. Such as figure 1 As shown, the method at least includes the following processes.
[0065] Step 101: The sending node transmits a data packet to the receiving node and more than one intermediate node, and judges w...
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The invention provides a medium access control (MAC) method and device of multirate cooperation. The method is characterized by comprising the following steps: sending data packets to a receiving node and more than one intermediate nodes by a sending node, and judging whether the receiving node receives the data packets successfully; if the receiving node receives the data packets successfully, stopping processes, otherwise setting existing competition rate by the receiving node; judging whether each intermediate node meets preset conditions; if each intermediate node meets the preset conditions, competitively sending ready help (RH) packets to the receiving node so as to determine cooperative nodes; and judging whether the cooperative nodes are determined successfully by the receiving node, if the cooperative nodes are determined successfully, sending the data packets to the receiving node by the cooperative nodes, otherwise returning to the step of setting the existing competition rate by the receiving node. By using the MAC method and device, the effectiveness of data transmission can be ensured, and the transmission time delay can be shortened.
Description
technical field [0001] The present invention relates to wireless communication technology, in particular to a multi-rate cooperative medium access control (Medium Access Control, MAC for short) method and device. Background technique [0002] The MAC method is used for multiple nodes or users to share channel resources quickly, efficiently, fairly, and reliably, so it has an important impact on performance indicators such as network throughput and delay. In wireless communication, in order to reduce the adverse effects of multipath fading, diversity transmission is adopted. The sending node transmits multiple copies of the same signal through fading independent channels, and the receiving node combines the signals of each channel to ensure reliable communication. In the above-mentioned diversity transmission, it is necessary to use the cooperative MAC method to control the user shared channel, select the cooperative node from the intermediate nodes between the sending node a...
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IPC IPC(8): H04L1/00H04L1/16H04W74/08
Inventor 王梦迪刘凯刘锋
Owner BEIHANG UNIV