Relay apparatus for relaying a data packet

A relay device and data grouping technology, applied in the field of wireless networks, can solve the problems of conflicting transmission selection, calculation failure, grouping conflict, etc., to achieve the effect of reliable retransmission and increase of total throughput

Inactive Publication Date: 2008-07-16
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reasons for unsuccessful calculation of the frame check sequence at the access point AP are, for example: poor channel conditions, i.e. generated bit errors; or packet collisions by two or more terminals transmitting simultan

Method used

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  • Relay apparatus for relaying a data packet
  • Relay apparatus for relaying a data packet
  • Relay apparatus for relaying a data packet

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0054] FIG. 1 shows a block diagram of an embodiment of a relay device 100 of the present invention. FIG. 1 shows a receiving unit 110 , a helper detector 120 and a sending unit 130 . The relay device 100 for relaying the data packet to be sent from the first partner transceiver to the second partner transceiver includes a receiving unit 110, the receiving unit 110 is used to receive the data packet and send and receive the data packet in the second partner transceiver Receives an acknowledgment packet sent from the second partner transceiver to the first partner transceiver when the transceiver has successfully received the data packet.

[0055] Several embodiments of the invention are discussed below. In the infrastructure case, a distinction is made between uplink and downlink transmission directions. The relay device 100 of the present invention receives data packets transmitted from a first partner transceiver to a second partner transceiver. Embodiments of the inventi...

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Abstract

A relay apparatus (100) for relaying a data packet to be transmitted from a first partner transceiver to a second partner transceiver comprising a receive unit (110) for receiving the data packet and for receiving an acknowledgement packet to be transmitted from the second partner transceiver to the first partner transceiver when the second partner transceiver has successfully received the data packet. The relay apparatus (100) further comprising a help detector (120) for providing a help indicator if a help required situation is detected and a transmit unit (130) for transmitting the data packet in response to the help indicator. The help required situation is detected based on whether a first communication link between the relay apparatus (100) and the second partner transceiver is better than a second communication link between the first and second partner transceivers, the second communication link being evaluated by an information being available from the data packet.

Description

technical field [0001] The present invention relates to the field of wireless networks, where networks are considered to have a fixed infrastructure, ad hoc or multi-hop networks, and hybrids thereof, also known as wireless local area networks, wireless mesh networks or wireless multi-hop networks. Background technique [0002] Reliable and fast communication between terminals and their associated Access Points (APs) is one of the key issues in any Wireless Local Area Network (WLAN), in order to avoid wasting power on retransmissions and will share radio channels traffic is reduced to a minimum. In fact, multiple retransmissions are a waste of valuable energy usually provided by the battery on the terminal, and retransmissions also make the use of radio resources inefficient and cause Communication blocked. Transmitters in WLANs based on the IEEE 802.11 specification adjust their modulation schemes and coding rates to suit the current channel conditions to maximize throug...

Claims

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Application Information

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IPC IPC(8): H04L1/02H04B1/707H04B7/02H04W88/04
CPCH04W88/04H04L1/0009H04B7/15521H04L1/06H04L2001/0097H04L1/1877H04L1/188H04L2001/0093
Inventor 路易斯·罗耶拉伊玛德·阿德乔尔格·温德默尔菲利普·霍夫曼
Owner NTT DOCOMO INC
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