# US 2014/0192705 A1 · Selective Relaying in a Network Node > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192705 A1 - Document ID: US20140192705A1 - Status: Published application - Kind: A1 - Application number: 14/127,619 - Filed: 2011-06-20 - Published: 2014-07-10 - Earliest claimed: 2011-06-20 - Assignees: Telefonaktiebolaget L M Ericsson (publ) - Inventors: Vicknesan Ayadurai; Mikael Prytz - Web page: https://patentgrep.com/patent/US20140192705A1 ## CPC - H04B 7/15528: {Control of operation parameters of a relay station to exploit the physical medium} - H04B 7/155: Ground-based stations (H04B7/204 takes precedence) - H04B 7/15507: {Relay station based processing for cell extension or control of coverage area, (network planning with network coordinated processing with regard to cell extension H04W16/26; network topologies using dedicated repeater stations H04W84/047; terminal devices adapted for relaying to or from an other terminal H04W88/04)} - H04L 1/1867: Arrangements specially adapted for the transmitter end - H04L 1/1887: {Scheduling and prioritising arrangements} - H04W 88/04: adapted for relaying to or from another terminal or user - H04L 2001/0097: {Relays} - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Network node (110) and method in the network node (110), for forwarding a wirelessly transmitted data packet to a second network node (120), which data packet was received from a third network node (130) with the second network node (120) as the intended recipient. The method comprises monitoring (501) data packets exchanged between the second network node (120) and the third network node (130), determining (502) that a wireless communication session is established between the second and third network nodes (120, 130), measuring (503) received signal power of wireless signals received from the second and third network nodes (120, 130), respectively, on at least two different points in time, detecting (504) a difference over time of measured (503) received signal power, identifying (506) that a data packet, transmitted by the third network node (130) is not received by the second network node (120), forwarding (507) the data packet, identified (506) as not received. ## Claims ### Claim at position 1 1-17. (canceled) ### Claim 18 A method in a first network node, for forwarding a wirelessly transmitted data packet to a second network node, which data packet was received from a third network node with the second network node as the intended recipient of the data packet, the method comprising: monitoring data packets exchanged between the second network node and the third network node, determining that a wireless communication session is established between the second network node and the third network node, measuring received signal power of wireless signals received from the second network node and from the third network node, respectively, on at least two different points in time, detecting a difference over time of measured received signal power of wireless signals received from at least one of the second network node and the third network node, identifying that a data packet, transmitted by the third network node is not received by the second network node, forwarding the monitored data packet, identified as not received by the second network node, to be received by the second network node. ### Claim 19 (depends on 18) The method according to claim 18, further comprising buffering the monitored data packets exchanged between the second network node and the third network node, for enabling instant forwarding of any data packet identified as not received by the intended recipient. ### Claim 20 (depends on 18) The method according to claim 18, wherein the data packet is identified as not received by the second network node, by detecting a retransmission of the data packet, made by the third network node. ### Claim 21 (depends on 18) The method according to claim 18, wherein the data packet is identified as not received by the second network node, by detecting that the second network node has not transmitted an acknowledgement for the data packet. ### Claim 22 (depends on 18) The method according to claim 18, wherein the data packet is identified as not received by the second network node, by detecting that the second network node has transmitted a non-acknowledgement for the data packet. ### Claim 23 (depends on 18) The method according to claim 18, further comprising waiting for a period of time before forwarding the data packet identified as not received by the second network node, and refraining from forwarding the data packet if it is detected that another network node is forwarding the data packet. ### Claim 24 (depends on 18) The method according to claim 18, wherein, upon forwarding the data packet identified as not received by the second network node, all subsequent data packets exchanged between the second network node and the third network node within the established wireless communication session are continuously forwarded. ### Claim 25 (depends on 24) The method according to claim 24, further comprising: delaying the forwarding of a subsequent data packet to be forwarded, for a period of time, detecting an acknowledgement from the second network node, acknowledging the reception of the data packet to be forwarded, and disabling the forwarding of data packets exchanged between the second network node and the third network node. ### Claim 26 (depends on 18) The method according to claim 18, wherein: detecting the difference over time of measured received signal power of wireless signals received from at least one of the second network node and the third network node comprises detecting that the difference over time of measured received signal power of wireless signals exceeds a threshold value. ### Claim 27 (depends on 18) The method according to claim 18, wherein a plurality of wireless communication sessions is monitored simultaneously. ### Claim 28 (depends on 18) The method according to claim 18, wherein it is determined that a wireless communication session is established between the second network node and the third network node, by monitoring data packets exchanged between the second network node and the third network node, using any of: packet inspection and checking address labels; packet inspection and buffering packets and matching up- and downstream packets; or by using information from another network node. ### Claim 29 (depends on 18) The method according to claim 18, wherein the wireless transmission between the second network node and the third network node is performed within a Wireless Local Area Network, a Wi-Fi network, a wireless broadband network, a wireless hotspot zone, or a network based on broadcasting of wireless data. ### Claim 30 A network node, for forwarding a wirelessly transmitted data packet to a second network node, which data packet was received from a third network node with the second network node as the intended recipient of the data packet, the network node comprising: a receiver, configured to receive wireless signals from the second network node and from the third network node respectively, a processing circuit, configured to: monitor data packets exchanged between the second network node and the third network node; determine that a wireless communication session is established between the second network node and the third network node; measure the received signal power of wireless signals received from the second network node and from the third network node, respectively, on at least two different points in time; detect a difference over time of measured received signal power of wireless signals received from at least one of the second network node and the third network node; identify that a data packet, transmitted by the third network node is not received by the second network node; and a transmitter, configured to forward the monitored data packet, identified as not received by the second network node, to be received by the second network node. ### Claim 31 (depends on 30) The network node according to claim 30, further comprising: a memory, configured to buffer monitored data packets exchanged between the second network node and the third network node. ### Claim 32 (depends on 30) The network node according to claim 30, wherein the processing circuit is further configured to continuously forward all subsequent data packets exchanged between the second network node and the third network node within the established wireless communication session, upon forwarding the data packet identified as not received by the second network node. ### Claim 33 (depends on 30) The network node according to claim 30, wherein the processing circuit is further configured to delay the forwarding of a subsequent data packet to be forwarded, for a period of time, detect an acknowledgement from the second network node, acknowledging the reception of the data packet to be forwarded, and disable the forwarding of data packets exchanged between the second network node and the third network node. ### Claim 34 (depends on 30) The network node according to claim 30, wherein the processing circuit is further configured to wait for a period of time before forwarding the data packet identified as not received by the second network node, and refrain from forwarding the data packet if it is detected that another network node is forwarding the data packet.