Method for transmitting a frame at a high rate in a wireless local area network
First Claim
1. A method for transmitting data in a wireless local area network, the method comprising the steps of:
- a) requesting, by a wireless access point, transmission of information related to reliable nodes to a wireless terminal having a transfer rate less than a predetermined threshold if data to be transmitted to the wireless terminal occurs in the wireless access point, the reliable nodes being other wireless terminals that can communicate with the wireless terminal and the wireless access point;
b) producing, by the wireless terminal, a reliable node information frame containing both information related to reliable nodes capable of communicating with the wireless terminal over a wireless channel and information related to greatest allowable first transfer rates between the reliable nodes and the wireless terminal, and transmitting the reliable node information frame from the wireless terminal to the wireless access point;
c) determining, by the wireless access point, an optimal relay node selected from the reliable nodes, based on greatest allowable second transfer rates between the reliable nodes and the wireless access point and based on the greatest allowable first transfer rates between the reliable nodes and the wireless terminal, and determining if a relay gain exists; and
d) performing relay transmission from the wireless access point to the wireless terminal if the relay gain exists, and performing direct transmission from the wireless access point to the wireless terminal if no relay gain exists.
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Accused Products
Abstract
A method for transmitting data at a high rate in a wireless LAN is provided. A wireless access point requests reliable node information from a wireless terminal having a transfer rate equal to or less than a predetermined transfer rate if data to be transmitted to the terminal occurs. The terminal produces a frame containing information related to reliable nodes that can communicate with the terminal and information of greatest transfer rates between the reliable nodes and the terminal, and transmits the frame to the access point. The access point selects an optimal relay node from the reliable nodes, based on the greatest transfer rates between the reliable nodes and the access point and transfer rates between the reliable nodes and the terminal, and determines if a relay gain exists when using the optimal node. If the relay gain exists, the access point performs relay transmission to the terminal; otherwise, it performs direct transmission to it.
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Citations
9 Claims
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1. A method for transmitting data in a wireless local area network, the method comprising the steps of:
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a) requesting, by a wireless access point, transmission of information related to reliable nodes to a wireless terminal having a transfer rate less than a predetermined threshold if data to be transmitted to the wireless terminal occurs in the wireless access point, the reliable nodes being other wireless terminals that can communicate with the wireless terminal and the wireless access point; b) producing, by the wireless terminal, a reliable node information frame containing both information related to reliable nodes capable of communicating with the wireless terminal over a wireless channel and information related to greatest allowable first transfer rates between the reliable nodes and the wireless terminal, and transmitting the reliable node information frame from the wireless terminal to the wireless access point; c) determining, by the wireless access point, an optimal relay node selected from the reliable nodes, based on greatest allowable second transfer rates between the reliable nodes and the wireless access point and based on the greatest allowable first transfer rates between the reliable nodes and the wireless terminal, and determining if a relay gain exists; and d) performing relay transmission from the wireless access point to the wireless terminal if the relay gain exists, and performing direct transmission from the wireless access point to the wireless terminal if no relay gain exists. - View Dependent Claims (2, 3, 4, 5)
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6. A method for transmitting a data frame by a wireless access point in a wireless local area network including the wireless access point and a plurality of wireless terminals, said wireless access point capable of transmitting a data frame to the plurality of wireless terminals over wireless channels, the method comprising the steps of:
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a) requesting information related to reliable nodes from a wireless terminal having a transfer rate less than a predetermined threshold if data to be transmitted to the wireless terminal occurs, the reliable nodes being other wireless terminals that can communicate with the wireless terminal and the wireless access point; b) determining, upon receipt of a reliable node information frame as a response signal from the wireless terminal, an optimal relay node from among the reliable nodes, based on greatest allowable second transfer rates between the reliable nodes and the wireless access point, and based on greatest allowable first transfer rates between the reliable nodes and the wireless terminal; c) comparing relay transmission to the wireless terminal via the optimal relay node with direct transmission to the wireless terminal to determine if a relay gain exists; and d) performing relay transmission to the wireless terminal if the relay gain exists, and performing direct transmission to the wireless terminal if no relay gain exists. - View Dependent Claims (7, 8, 9)
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Specification