Medium access control (MAC) method and device of multirate cooperation
A medium access control and multi-rate technology, applied in the direction of using the return channel for error prevention/detection, digital transmission systems, electrical components, etc., can solve large transmission delays, reduce data transmission delays, and can not be well To ensure the validity of data transmission and other issues, to achieve the effect of ensuring validity and shortening transmission delay
Inactive Publication Date: 2011-07-13
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 objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0064] figure 1 It is a flow chart of a method for issuing multi-rate cooperative MAC according to an embodiment of the present invention. Such as figure 1 As shown, the method includes at least the following processes.
[0065] Step 101: The sending node transmits a data packet to the receiving node and more than one intermediate no...
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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 method and device for multi-rate cooperative media access control (Medium Access Control, MAC for short). Background technique [0002] The MAC method is used for multiple nodes or users to quickly, efficiently, fairly, and reliably share channel resources, and therefore 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 channels independent of each other in fading, and the receiving node combines the signals of each channel to ensure reliable communication. In the above-mentioned diversity transmission, it is necessary to adopt a cooperative MAC method to control the user sharing channel, select a cooperative node from the intermediate nodes betw...
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Inventor 王梦迪刘凯刘锋
Owner BEIHANG UNIV