# US 2008/0186950 A1 · Wireless data frame structure among nodes > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0186950 A1 - Document ID: US20080186950A1 - Status: Published application - Kind: A1 - Application number: 11/831,108 - Filed: 2007-07-31 - Published: 2008-08-07 - Earliest claimed: 2006-08-18 - Assignees: Fujitsu Limited - Inventors: Chenxi ZHU; Wei-Peng Chen; Jonathan Agre - Web page: https://patentgrep.com/patent/US20080186950A1 ## CPC - H04W 72/20: Control channels or signalling for resource management - H04B 7/2606: {Arrangements for base station coverage control, e.g. by using relays in tunnels} - H04W 56/0085: {detecting a given structure in the signal} - H04W 16/26: Cell enhancers {or enhancement}, e.g. for tunnels, building shadow - H04W 84/047: {using dedicated repeater stations} - H04W 92/16: Interfaces between hierarchically similar devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract The embodiments provide transmitting at same time first and relay second node preambles aligning data frames among the first node and the relay second node wirelessly communicating in a channel and transmitting by the first node one or more radio resource control parameters managing radio resources of the wireless communicating in the channel among the aligned first node and the relay second node. A relay resynchronization amble sequence managing synchronizing in the channel the first node frames with the relay second node frames is periodically transmitted to the relay second node. ## Claims ### Claim 1 A method, comprising: transmitting at same time a first node and a relay second node preambles aligning data frames of the first node and the relay second node, the first node and the relay second node to one or more third nodes all wirelessly communicating in a single channel; specifying radio resource control parameters managing radio resources of the wireless communication in the single channel among the aligned first node and the relay second node to the third nodes; and periodically transmitting to the relay second node a relay resynchronization amble sequence managing the aligning in the single channel of the first node frames and the relay second node frames. ### Claim 2 (depends on 1) The method according to claim 1, wherein the radio resource control parameter comprises presence and/or a location of the relay second node resynchronization amble sequence in a next wireless communication link data frame, an index of a plurality of the relay second node resynchronization amble sequences, a burst profile of a next radio resource control parameter, a down link transmission to the relay second node in a next data frame, an uplink transmission from the relay second node to the first node in a next data frame, downlink and/or uplink radio resources of the relay second node to the third nodes in the single channel, or any combinations thereof. ### Claim 3 (depends on 1) The method according to claim 1, wherein the radio resource control parameter specifies downlink and/or uplink channel portion assignment of the relay second node to the third nodes in the single channel, and the method further comprises managing by the relay second node a communication schedule to the third nodes according to the channel portion assignment. ### Claim 4 (depends on 1) The method according to claim 1, wherein the radio resource control parameter is transmitted at end of a wireless communication link frame. ### Claim 5 (depends on 3) The method according to claim 3, wherein the relay second node resynchronization amble sequence is transmitted after the radio resource control parameter. ### Claim 6 (depends on 1) The method according to claim 1, wherein the radio resource control parameter includes the relay second node resynchronization amble sequence. ### Claim 7 (depends on 1) The method of claim 1, wherein the first node dynamically specifies the control parameters. ### Claim 8 (depends on 1) The method of claim 1, wherein the control parameter specifies a transceiving mode switch time in the single channel for the relay second node, based upon radio resource requirements on the downlink/uplink communication links among the first node and the relay second node to the third nodes. ### Claim 9 (depends on 1) The method according to claim 1, wherein the radio resource control parameter specifies downlink and/or uplink channel portion assignment among the first node and the relay second node to the third nodes in the single channel, and the method further comprises: managing by the first node and/or the relay second node a communication schedule to the relay second node and/or the third nodes in the assigned channel according to the channel portion assignment; and specifying the radio resource control parameter by the first node, the relay second node, or any combination thereof. ### Claim 10 (depends on 9) The method according to claim 9, wherein the radio resource control parameter comprises presence and/or a location of the relay second node resynchronization amble sequence in a next wireless communication link data frame, an index of a plurality of the relay second node resynchronization amble sequences, a burst profile of a next radio resource control parameter, a down link transmission to the relay second node in a next data frame, an uplink transmission from the relay second node to the first node in a next data frame, downlink and/or uplink radio resources of the relay second node to the third nodes in the single channel, a transceiving mode switch time in the single channel for the relay second node, or any combinations thereof. ### Claim 11 (depends on 1) The method of claim 1, wherein the nodes wirelessly communicate according to orthogonal frequency-division multiple access (OFDMA) system using one or more sets of subcarriers in the single channel. ### Claim 12 An apparatus as a first node in wireless communication in a single channel with a relay second node to one or more third nodes, comprising: a controller controlling transmission at same time first and relay second node preambles aligning data frames among the first node and the relay second node wirelessly communicating in the single channel; transmitting by the first node one or more radio resource control parameters managing radio resources of the wireless communicating in the single channel among the aligned first node and the relay second node to the third nodes; and periodically transmitting to the relay second node a relay resynchronization amble sequence managing synchronizing in the single channel the relay second node frames with the first node frames. ### Claim 13 (depends on 12) The apparatus according to claim 12, wherein the radio resource control parameter comprises presence and/or a location of the relay second node resynchronization amble sequence in a next wireless communication link data frame, an index of a plurality of the relay second node resynchronization amble sequences, a burst profile of a next radio resource control parameter, a down link transmission to the relay second node in a next data frame, an uplink transmission from the relay second node to the first node in a next data frame, downlink and/or uplink radio resources of the relay second node to the third nodes in the single channel, or any combinations thereof. ### Claim 14 (depends on 13) The apparatus according to claim 13, wherein the radio resource control parameter specifies downlink and/or uplink channel portion assignment of the relay second node to the third nodes in the single channel. ### Claim 15 (depends on 13) The apparatus according to claim 13, wherein the radio resource control parameter is transmitted near end of a wireless communication link data frame. ### Claim 16 (depends on 14) The apparatus according to claim 14, wherein the relay second node resynchronization amble sequence is transmitted after the radio resource control parameter. ### Claim 17 (depends on 13) The apparatus according to claim 13, wherein the radio resource control parameter includes the relay second node resynchronization amble sequence. ### Claim 18 (depends on 13) The apparatus of claim 13, wherein the controller dynamically specifies and transmits the radio resource control parameters. ### Claim 19 (depends on 13) The apparatus of claim 13, wherein the controller wirelessly communicates with the second relay node to the third nodes and/or directly with the third nodes in a WiMAX Mobile Multi-hop Relay-Based Cell (MMR-Cell) and the first node is a base station and the third nodes are user mobile stations. ### Claim 20 (depends on 19) The apparatus of claim 19, wherein the controller wireless communicates according to orthogonal frequency-division multiple access (OFDMA) system using one or more sets of subcarriers in the single channel.