# US 8,787,240 B2 · Peer-to-peer communication protocol for relay enhanced cellular wireless communication systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,787,240 B2 - Document ID: US8787240B2 - Status: Granted - Kind: B2 - Application number: 12/422,122 - Filed: 2009-04-10 - Published: 2010-10-14 - Granted: 2014-07-22 - Earliest claimed: 2009-04-10 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Yong Liu; Chiu Ngo - Inventors: Yong Liu; Chiu Ngo - Web page: https://patentgrep.com/patent/US8787240B2 ## CPC - H04L 25/24: Relay circuits using discharge tubes or semiconductor devices {(H04L25/22 takes precedence)} - H04B 7/2606: {Arrangements for base station coverage control, e.g. by using relays in tunnels} - H04W 72/04: Wireless resource allocation - H04B 7/2656: {for structure of frame, burst} - H04L 5/0035: {Resource allocation in a cooperative multipoint environment} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/1469: {using time-sharing} - H04W 84/047: {using dedicated repeater stations} - H04W 88/04: adapted for relaying to or from another terminal or user - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method and system for communication between mobile stations in a wireless relay enhanced cellular communication system. One implementation involves providing a communication resource allocation for peer-to-peer (P2P) communication between a pair of mobile stations during a P2P enhanced time frame wherein one mobile station serves a role as a transparent relay station (MRS) and another mobile station serves a role as a peer mobile station in the pair; and delivering resource allocation information comprising communication periods and frequency subcarriers to the pair of mobile stations, for the mobile station pair to conduct P2P communication therebetween in the P2P enhanced time frame. ## Claims ### Claim 1 A method of communication between mobile stations in a wireless relay enhanced cellular (REC) communication system, comprising: providing a communication resource allocation for peer-to-peer (P2P) communication between a pair of mobile stations during a P2P enhanced time frame, wherein one mobile station is assigned a role as a transparent relay station (MRS) and another mobile station is assigned a role as a peer mobile station (MS) in the pair; and delivering resource allocation information comprising said communication resource allocation to the pair of mobile stations, for the mobile station pair to conduct P2P communication between the mobile station pair in the P2P enhanced time frame, wherein the resource allocation information comprises a message including an indication for P2P resource allocation information and an indication that identifies the role of each mobile station in the mobile station pair as a peer MS or a peer MRS, wherein the mobile station assigned as the MRS communicates directly with adjacent mobile stations, wherein an enhanced P2P frame structure for supporting communication by the MRS and peer mobile stations comprises a modified REC frame structure, wherein the modified REC frame structure comprises a single frame structure including transparent and non-transparent relay frame structures combined into the single frame structure, wherein control information is transmitted at a start of each enhanced P2P frame; wherein the message comprises a P2P-MAP message that includes a modified field format based on a portion of a UL-MAP message format, wherein the indication comprises a P2P channel ID field that identifies the role of each mobile station in the mobile station pair as the peer MS or the peer MRS, wherein the P2P channel ID field comprises information that: uniquely identifies a P2P mobile station pair, identifies communication direction, and identifies communication channel information. ### Claim 2 (depends on 1) The method of claim 1 further comprising: allocating communication resources comprises jointly considering station data traffic demands and available resources in time, frequency and space domains; wherein the resource allocation information further includes communication resource allocation information comprising communication periods and frequency subcarriers. ### Claim 3 (depends on 2) The method of claim 2 wherein the resource allocation information provides for one-way communication between the mobile station pair in a P2P enhanced time frame. ### Claim 4 (depends on 3) The method of claim 3 wherein the resource allocation information provides for only one-way communication between the mobile station pair during an uplink (UL) access zone allocated in the P2P enhanced time frame. ### Claim 5 (depends on 4) The method of claim 4 further comprising: providing a next communication resource allocation for a subsequent P2P enhanced time frame reversing said assigned roles of the mobile station pair, and reversing direction of communication between the mobile station pair during said subsequent P2P enhanced time frame. ### Claim 6 (depends on 2) The method of claim 2 wherein the resource allocation information provides for two-way communication between the mobile station pair in a P2P enhanced time frame. ### Claim 7 (depends on 6) The method of claim 6 wherein the resource allocation information provides for two-way communication between the mobile station pair in the P2P enhanced time frame, including peer MS to MRS (peer MS→MRS) communication during an uplink (UL) access zone allocated in the P2P enhanced time frame, and MRS to peer MS (MRS→peer MS) communication during a transparent zone immediately after a downlink (DL) relay zone allocated in the same P2P enhanced time frame. ### Claim 8 (depends on 3) The method of claim 3 wherein the resource allocation information provides for only one-way communication between the mobile station pair in each P2P enhanced time frame. ### Claim 9 (depends on 4) The method of claim 4, wherein the assigned role as the transparent relay station (MRS) and the assigned role as the peer mobile station in the pair of mobile stations reverse in each subsequent P2P enhanced time frame to provide one-way communication between the pair of mobile stations in reverse order. ### Claim 10 (depends on 1) The method of claim 1, wherein the mobile station assigned the role of the MRS maintains communication with a wireless base station (BS) or other relay stations (RSs). ### Claim 11 (depends on 1) The method of claim 1, wherein the mobile station assigned the role as the MRS communicates directly with adjacent mobile stations and at the same time maintains communication with a wireless base station (BS) or other relay stations (RSs). ### Claim 12 (depends on 1) The method of claim 1, wherein the enhanced P2P frame structure provides a resource allocation map for P2P communication in the wireless REC communication system. ### Claim 13 (depends on 12) The method of claim 12, wherein resource blocks are scheduled in the enhanced P2P frame structure. ### Claim 14 (depends on 12) The method of claim 12, wherein the resource allocation map for P2P communication in the wireless REC communication system provides resource allocation including communication time periods and frequency subcarriers. ### Claim 15 (depends on 1) The method of claim 1, wherein mobile stations communicate directly with one another under point-to-multipoint (PMP) and mobile multihop relay (MMR) modes using the modified REC frame structure. ### Claim 16 (depends on 1) The method of claim 1, wherein the mobile station assigned the role as the MRS transmits control information and participates in resource scheduling. ### Claim 17 (depends on 1) The method of claim 1, wherein P2P communication protocol of the wireless REC communication system provides direct communications between mobile stations. ### Claim 18 (depends on 1) The method of claim 1, wherein the assigned role as the transparent relay station (MRS) and the assigned role as the peer mobile station (MS) in the pair of mobile stations is reversed in each subsequent P2P enhanced time frame for providing two-way communication between the pair of mobile stations based on a series of one-way communications from the station having a current assigned role of the MS to the station having a current assigned role of the MRS. ### Claim 19 (depends on 1) The method of claim 1, wherein a base station assigns the roles for the MRS and the peer mobile station in the pair. ### Claim 20 (depends on 19) The method of claim 19, wherein the assigned roles for the MRS and the peer mobile station in the pair are determined based on traffic demands. ### Claim 21 (depends on 20) The method of claim 20, wherein the assigned roles for the MRS and the peer mobile station in the pair are assigned in the control information. ### Claim 22 (depends on 1) The method of claim 1, wherein the modified REC flame structure enables P2P communications from at least one resource block. ### Claim 23 (depends on 1) The method of claim 1, wherein the modified REC flame structure enables P2P communications from only one or two resource blocks. ### Claim 24 (depends on 1) The method of claim 1, wherein the modified REC flame structure comprises a modified IEEE P802.16j relay station communication flame structure for supporting P2P communications among mobile stations. ### Claim 25 (depends on 1) The method of claim 1, wherein the P2P-MAP message comprises a separate message from a UL-MAP message. ### Claim 26 (depends on 1) The method of claim 1, wherein the P2P-MAP message comprises an extension of a UL-MAP message. ### Claim 27 (depends on 1) The method of claim 1, wherein the P2P channel ID field information is assigned by a wireless base station (BS) to a P2P mobile station pair when the P2P mobile station pair associates with each other and registers at the BS. ### Claim 28 A relay enhanced cellular (REC) wireless communication system, comprising: multiple mobile stations; and a resource controller provides a communication resource allocation for peer-to-peer (P2P) communication between a pair of mobile stations during a P2P enhanced time frame wherein one mobile station is assigned a role as a transparent relay station (MRS) and another mobile station is assigned a role as a peer mobile station (MS) in the pair, and delivers resource allocation information comprising communication periods and frequency subcarriers to the pair of mobile stations, for the mobile station pair to conduct one-way communication between the mobile station pair in the P2P enhanced time frame, wherein the resource allocation information comprises a message including an indication for P2P resource allocation information and an indication that identifies the role of each mobile station in the mobile station pair as a peer MS or a peer MRS, wherein the mobile station assigned as the MRS communicates directly with adjacent mobile stations, wherein an enhanced P2P frame structure for supporting communication by the MRS and peer mobile stations comprises a modified REC frame structure, wherein the modified REC frame structure comprises a single frame structure including transparent and non-transparent relay frame structures combined into the single frame structure, wherein control information is transmitted at a start of each enhanced P2P frame; wherein the message comprises a P2P-MAP message that includes a modified field format based on a portion of a UL-MAP message format, wherein the indication comprises a P2P channel ID field that includes information that: uniquely identifies a P2P mobile station pair, identifies the role of each mobile station in the P2P mobile station pair as the peer MS or the peer MRS, identifies communication direction, and identifies communication channel information. ### Claim 29 (depends on 28) The system of claim 28 wherein the resource controller further comprises an optimization function that allocates communication resources by jointly considering station data traffic demands and available resources in time, frequency and space domains, wherein the resource allocation information further includes communication resource allocation information. ### Claim 30 (depends on 29) The system of claim 29 wherein the resource allocation information provides for one-way communication between the mobile station pair in a P2P enhanced time frame. ### Claim 31 (depends on 30) The system of claim 30 wherein the resource allocation information provides for only one-way communication between the mobile station pair during an uplink (UL) access zone allocated in the P2P enhanced time frame. ### Claim 32 (depends on 29) The system of claim 29 wherein the resource allocation information provides for two-way communication between the mobile station pair in a P2P enhanced time frame. ### Claim 33 (depends on 32) The system of claim 32 wherein the resource allocation information provides for two-way communication between the mobile station pair in the P2P enhanced time frame, including peer MS to MRS (peer MS→MRS) communication during an uplink (UL) access zone allocated in the P2P enhanced time frame, and MRS to peer MS (MRS→peer MS) communication during a transparent zone immediately after a downlink (DL) relay zone in the same P2P enhanced time frame. ### Claim 34 (depends on 30) The system of claim 30 wherein the resource allocation controller further provides a next communication resource allocation for a subsequent P2P enhanced time frame reversing said assigned roles of the mobile station pair, and reversing direction of communication between the mobile station pair during said subsequent P2P enhanced time frame. ### Claim 35 (depends on 28) The system of claim 28 further comprising a base station including said resource allocation controller. ### Claim 36 A computer program product for mobile station communication in a relay enhanced cellular (REC) wireless communication system, the computer program product comprising: a non-transitory computer usable medium having computer readable program code embodied therewith, wherein the computer readable program when executed on the computer causes the computer to: provide a communication resource allocation for peer-to-peer (P2P) communication between a pair of mobile stations during a P2P enhanced time frame wherein one mobile station is assigned a role as a transparent relay station (MRS) and another mobile station is assigned a role as a peer mobile station (MS) in the pair; and deliver resource allocation information comprising said communication resource allocation to the pair of mobile stations, for the mobile station pair to conduct P2P communication between the mobile station pair in the P2P enhanced time frame, wherein the resource allocation information comprises a message including an indication for P2P resource allocation information and an indication that identifies the role of each mobile station in the mobile station pair as a peer MS or a peer MRS, wherein the mobile station assigned the role of the MRS communicates directly with adjacent mobile stations, wherein an enhanced P2P frame structure for supporting communication by the MRS and peer mobile stations comprises a modified REC frame structure, wherein the modified REC frame structure comprises a single frame structure including transparent and non-transparent relay frame structures combined into the single frame structure, wherein control information is transmitted at a start of each enhanced P2P frame; wherein the message comprises a P2P-MAP message that includes a modified field format based on a portion of a UL-MAP message format, wherein the indication comprises a P2P channel ID field that includes information that: uniquely identifies a P2P mobile station pair, identifies the role of each mobile station in the P2P mobile station pair as the peer MS or the peer MRS, identifies communication direction, and identifies communication channel information. ### Claim 37 (depends on 36) The computer program product of claim 36 further comprising computer readable program code for: allocating communication resources comprises jointly considering station data traffic demands and available resources in time, frequency and space domains; wherein the resource allocation information further includes communication resource allocation information. ### Claim 38 (depends on 37) The computer program product of claim 37 wherein the resource allocation information provides for only one-way communication between the mobile station pair in a P2P enhanced time frame. ### Claim 39 (depends on 38) The computer program product of claim 38 wherein the resource allocation information provides for one-way communication between the mobile station pair during an uplink (UL) access zone allocated in the P2P enhanced time frame. ### Claim 40 (depends on 37) The computer program product of claim 37 wherein the resource allocation information provides for two-way communication between the mobile station pair in a P2P enhanced time frame. ### Claim 41 (depends on 40) The computer program product of claim 40 wherein the resource allocation information provides for two-way communication between the mobile station pair in the P2P enhanced time frame, including peer MS to MRS (peer MS→MRS) communication during an uplink (UL) access zone allocated in the P2P enhanced time frame, and MRS to peer MS (MRS→peer MS) communication during a transparent zone immediately after a downlink (DL) relay zone in the P2P the same P2P enhanced time frame. ### Claim 42 (depends on 38) The computer program product of claim 38 further computer readable program code for: providing a next communication resource allocation for a subsequent P2P enhanced time frame reversing said assigned roles of the mobile station pair, and reversing direction of communication between the mobile station pair during said subsequent P2P enhanced time frame.