# US 2014/0194133 A1 · Allocating resources and transmitting data in mobile telecommunication systems comprising machine type communication applications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0194133 A1 - Document ID: US20140194133A1 - Status: Published application - Kind: A1 - Application number: 14/238,235 - Filed: 2012-08-06 - Published: 2014-07-10 - Earliest claimed: 2011-08-11 - Assignees: Sca Ipla Holdings Inc. - Inventors: Peter Darwood; Martin Beale; Darren Mcnamara; Atsushi Yoshizawa; Yuichi Morioka - Web page: https://patentgrep.com/patent/US20140194133A1 ## CPC - H04L 5/0037: {Inter-user or inter-terminal allocation} - H04L 5/0041: {Frequency-non-contiguous} - 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 5/0066: {Requirements on out-of-channel emissions} - H04W 16/32: Hierarchical cell structures - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - 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 A method of communicating data in a wireless telecommunications system between plural base stations and plural terminal devices using plural Orthogonal Frequency Division Multiplex, OFDM, sub-carriers spanning a first frequency bandwidth. The method includes: communicating data between a first base station and a first terminal device using a first group of the OFDM sub-carriers distributed across the first frequency bandwidth, communicating data between a second base station, geographically separated from the first base station, and a second terminal device using a second group of the OFDM sub-carriers distributed across a second frequency bandwidth, and communicating control-plane data between the first base station and the first terminal device using a combination of the first and second groups of the OFDM sub-carriers. Guard regions may be provided in the frequency domain between frequencies of transmissions associated with the first base station and frequencies of transmissions associated with the second base station. ## Claims ### Claim 1 A method of communicating data in a wireless telecommunications system between a plurality of base stations and a plurality of terminal devices using a plurality of Orthogonal Frequency Division Multiplex, OFDM, sub-carriers spanning a first frequency bandwidth, the method comprising: communicating user-plane data between a first base station and a first terminal device using a first group of the OFDM sub-carriers distributed across the first frequency bandwidth; communicating user-plane data between a second base station and a second terminal device using a second group of the OFDM sub-carriers distributed across a second frequency bandwidth, wherein the second frequency bandwidth is smaller than and within the first frequency bandwidth; and communicating control-plane data between the first base station and the first terminal device using a combination of the first and second groups of the OFDM sub-carriers. ### Claim 2 (depends on 1) The method of claim 1, wherein the second base station is a relay base station for the first base station, and the method further comprises communicating relay data between the first base station and the second base station using the first group of the OFDM sub-carriers. ### Claim 3 (depends on 2) The method of claim 2, wherein a lower amount of user-plane data is communicated using OFDM sub-carriers arranged in frequency at a boundary between OFDM sub-carriers in the first group and OFDM sub-carriers in the second group as compared to an amount of user-plane data communicated using OFDM sub-carriers away from this boundary. ### Claim 4 (depends on 3) The method of claim 3, wherein user-plane data is communicated at a reduced rate using OFDM sub-carriers at the boundary. ### Claim 5 (depends on 3) The method of claim 3, wherein no user-plane data is communicated using OFDM sub-carriers at the boundary. ### Claim 6 (depends on 1) The method of claim 1, further comprising transmitting reference signals from the first base station using both the first and second groups of the OFDM sub-carriers. ### Claim 7 (depends on 6) The method of claim 6, wherein a density of the reference signals in the time and/or frequency domain transmitted from the first base station using the first group of the OFDM sub-carriers is greater than a density of reference signals in the time and/or frequency domain transmitted from the first base station using the second group of the OFDM sub-carriers. ### Claim 8 (depends on 6) The method of claim 6, wherein a lower amount of user-plane data is communicated using at least one OFDM sub-carrier which is adjacent in frequency to an OFDM sub-carrier on which a reference signal is transmitted in the second group of the OFDM sub-carriers as compared to the amount of user-plane data communicated using an OFDM sub-carrier in the second group that is not adjacent in frequency to the reference signal. ### Claim 9 (depends on 8) The method of claim 8, wherein user-plane data is communicated at a lower rate using the at least one OFDM sub-carrier which is adjacent in frequency to the OFDM sub-carrier on which a reference signal is transmitted. ### Claim 10 (depends on 8) The method of claim 8, wherein no user-plane data is communicated using the at least one OFDM sub-carrier which is adjacent in frequency to the OFDM sub-carrier on which a reference signal is transmitted. ### Claim 11 (depends on 1) The method of claim 1, further comprising transmitting reference signals from the first base station using only the first group of the OFDM sub-carriers at times when control-plane data is not communicated by the first base station. ### Claim 12 (depends on 1) The method of claim 1, wherein user-plane data is not communicated between the second base station and the second terminal device at times when control-plane data is communicated between the first base station and the first terminal device. ### Claim 13 (depends on 1) The method of claim 1, further comprising communicating user-plane data between a further base station and a further terminal device using the second group of the OFDM sub-carriers. ### Claim 14 (depends on 13) The method of claim 13, wherein the second base station and the further base station are both relay base stations for the first base station, and the method further comprises communicating relay data between the first base station and the second base station and between the first base station and the further base station using the first group of the OFDM sub-carriers. ### Claim 15 (depends on 1) The method of claim 1, wherein a geographic extent of a communication cell associated with the second base station is smaller than and within a geographic extent of a communication cell associated with the first base station. ### Claim 16 (depends on 1) The method of claim 1, wherein the first and second base stations are located at different sites. ### Claim 17 A wireless telecommunications system for communicating data between a plurality of base stations and a plurality of terminal devices using a plurality of Orthogonal Frequency Division Multiplex, OFDM, sub-carriers spanning a first frequency bandwidth, the system comprising: a first base station configured to communicate user-plane data with a first terminal device using a first group of the OFDM sub-carriers distributed across the first frequency bandwidth; and a second base station configured to communicate user-plane data with a second terminal device using a second group of the OFDM sub-carriers distributed across a second frequency bandwidth, wherein the second frequency bandwidth is smaller than and within the first frequency bandwidth, and wherein the first base station is configured to communicate control-plane data with the first terminal device using a combination of the first and second groups of the OFDM sub-carriers. ### Claim 18 (depends on 17) The wireless telecommunications system of claim 17, wherein the second base station is a relay base station for the first base station, and the first base station is configured to communicate relay data with the second base station using the first group of the OFDM sub-carriers. ### Claim 19 (depends on 18) The wireless telecommunications system of claim 18, wherein the first and second base stations are configured such that a lower amount of user-plane data is communicated using OFDM sub-carriers arranged in frequency at a boundary between OFDM sub-carriers in the first group and OFDM sub-carriers in the second group as compared to the amount of user-plane data communicated using OFDM sub-carriers away from the boundary. ### Claim 20 (depends on 19) The wireless telecommunications system of claim 19, wherein the first and second base stations are configured such that user-plane data is communicated at a reduced rate using OFDM sub-carriers at the boundary. ### Claim 21 (depends on 19) The wireless telecommunications system of claim 19, wherein the first and second base stations are configured such that no user-plane data is communicated using OFDM sub-carriers at the boundary. ### Claim 22 (depends on 17) The wireless telecommunications system of claim 17, wherein the first base station is configured to transmit reference signals using both the first and second groups of the OFDM sub-carriers. ### Claim 23 (depends on 22) The wireless telecommunications system of claim 22, wherein the first base station is configured such that the transmitted density of reference signals in time and/or frequency on the first group of the OFDM sub-carriers is greater than on the second group of the OFDM sub-carriers. ### Claim 24 (depends on 22) The wireless telecommunications system of claim 22, wherein the second base station is configured such that a lower amount of user-plane data is communicated using at least one OFDM sub-carrier which is adjacent in frequency to an OFDM sub-carrier on which a reference signal is transmitted in the second group of the OFDM sub-carriers as compared to the amount of user-plane data communicated using an OFDM sub-carrier that is not adjacent in frequency to the reference signal. ### Claim 25 (depends on 24) The wireless telecommunications system of claim 24, wherein the second base station is configured such that user-plane data is communicated at a reduced rate using the at least one OFDM sub-carrier which is adjacent in frequency to the OFDM sub-carrier on which the reference signal is transmitted. ### Claim 26 (depends on 24) The wireless telecommunications system of claim 24, wherein the second base station is configured such that no user-plane data is communicated using the at least one OFDM sub-carrier which is adjacent in frequency to the OFDM sub-carrier on which the reference signal is transmitted. ### Claim 27 (depends on 17) The wireless telecommunications system of claim 17, wherein the first base station is configured to transmit reference signals using only the first group of the OFDM sub-carriers at times when control-plane data is not being communicated by the first base station. ### Claim 28 (depends on 17) The wireless telecommunications system of claim 17, wherein the second base station is configured such that user-plane data is not communicated between the second base station and the second terminal device at times when control-plane data is communicated between the first base station and the first terminal device. ### Claim 29 (depends on 17) The wireless telecommunications system of claim 17, further comprising at least one further base station configured to communicate user-plane data with at least one further terminal device using the second group of the OFDM sub-carriers. ### Claim 30 (depends on 29) The wireless telecommunications system of claim 29, wherein the second base station and the further base station are both relay base stations for the first base station, and the first base station is configured to communicate relay data with the second base station and the further base station using the first group of the OFDM sub-carriers. ### Claim 31 (depends on 17) The wireless telecommunications system of claim 17, wherein a geographic extent of a communication cell associated with the second base station is smaller than and within a geographic extent of a communication cell associated with the first base station. ### Claim 32 (depends on 17) The wireless telecommunications system of claim 17, wherein the first and second base stations are located at different sites. ### Claim 33 A method of operating a base station for communicating data between the base station and a plurality of terminal devices in a wireless telecommunications system using a plurality of Orthogonal Frequency Division Multiplex, OFDM, sub-carriers spanning a first frequency bandwidth, the method comprising: communicating user-plane data with the plurality of terminal devices using a group of the OFDM sub-carriers distributed across a second frequency bandwidth which is smaller than and within the first frequency bandwidth; and communicating no user-plane data with the plurality of terminal devices using OFDM sub-carriers outside the group of the OFDM sub-carriers distributed across the second frequency bandwidth. ### Claim 34 A base station for communicating data with a plurality of terminal devices in a wireless telecommunications system using a plurality of Orthogonal Frequency Division Multiplex, OFDM, sub-carriers spanning a first frequency bandwidth, wherein the base station is configured to: communicate user-plane data with the plurality of terminal devices using a group of the OFDM sub-carriers distributed across a second frequency bandwidth, wherein the second frequency bandwidth is smaller than and within the first frequency bandwidth; and communicate no user-plane data with the plurality of terminal devices using OFDM sub-carriers outside the group of the OFDM sub-carriers distributed across the second frequency bandwidth. ### Claim 35 A method of operating a terminal device for communicating data in a wireless telecommunications system comprising a first base station and a second base station, wherein the first base station supports communications using a plurality of Orthogonal Frequency Division Multiplex, OFDM, sub-carriers spanning a first frequency bandwidth, the method comprising: communicating user-plane data between the second base station and the terminal device using a group of the OFDM sub-carriers distributed across a second frequency bandwidth, wherein the second frequency bandwidth is smaller than and within the first frequency bandwidth; and communicating no user-plane data between the terminal device and the second base station using OFDM sub-carriers outside the group of the OFDM sub-carriers distributed across the second frequency bandwidth. ### Claim 36 A terminal device for communicating data in a wireless telecommunications system comprising a first base station and a second base station, wherein the first base station supports communications using a plurality of Orthogonal Frequency Division Multiplex, OFDM, sub-carriers spanning a first frequency bandwidth, wherein the terminal device is configured to: communicate user-plane data between the second base station and the terminal device using a group of the OFDM sub-carriers distributed across a second frequency bandwidth, wherein the second frequency bandwidth is smaller than and within the first frequency bandwidth; and communicate no user-plane data between the terminal device and the second base station using OFDM sub-carriers outside the group of the OFDM sub-carriers distributed across the second frequency bandwidth.