# US 2010/0169731 A1 · Method and apparatus for transmitting data, and a communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0169731 A1 - Document ID: US20100169731A1 - Status: Published application - Kind: A1 - Application number: 11/909,732 - Filed: 2006-03-27 - Published: 2010-07-01 - Earliest claimed: 2005-03-31 - Assignees: Koninklijke Philips Electronics N.V. - Inventors: Matthew P.J. Baker; Timothy J. Moulsley - Web page: https://patentgrep.com/patent/US20100169731A1 ## CPC - H04L 1/0071: {Use of interleaving (interleaving per se H03M13/27)} - H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} - H04L 1/1819: {with retransmission of additional or different redundancy} - H04L 1/1887: {Scheduling and prioritising arrangements} - H04L 1/0057: {Block codes (H04L1/0061, H04L1/0064 take precedence)} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A communication system employs discontinuous transmission to create gaps in transmission during which a transmitting device (200) can receive. When the transmission of a data block coincides with a transmission gap such that a portion of the data block is not transmitted, the block is retransmitted later. Prior to the retransmission, the data in the data block is reordered. The reordering may be predetermined, or may be selected to ensure that the same portion of data does not coincide with a transmission gap in the retransmission. ## Claims ### Claim 1 A method of transmitting data in a communication system employing first predetermined time periods for the transmission of data and second predetermined time periods for transmission gaps, the method comprising: dividing the data into data blocks; transmitting the respective data blocks during respective first predetermined time periods, subject to refraining from transmitting portions of the data blocks coinciding with the second predetermined time periods; retransmitting at least those data blocks transmitted during those first predetermined time periods which overlap any of the second predetermined time periods; and reordering the data in the retransmitted data blocks prior to the retransmission. ### Claim 2 (depends on 1) A method as claimed in claim 1, wherein the reordering is predetermined. ### Claim 3 (depends on 2) A method as claimed in claim 2, wherein the predetermined reordering comprises at least one of: pseudo-random reordering; a cyclic shift; subdividing the data block into two parts and swapping the two parts. ### Claim 4 (depends on 1) A method as claimed in claim 1, wherein the reordering is selected to ensure that the portion of any data block coinciding with any of the second predetermined time periods does not coincide with any of the second predetermined time periods during the retransmission of that data block. ### Claim 5 (depends on 1) A method as claimed in claim 1, wherein the data in the data blocks comprises parity check bits, and the retransmitted data blocks comprise parity check bits which differ from those in the preceding transmission of the data blocks. ### Claim 6 Apparatus (200) for transmitting data in a communication system employing first predetermined time periods for the transmission of data and second predetermined time periods for transmission gaps, the apparatus (200) comprising: means (220) for inhibiting transmission during the second predetermined time periods; means (230) for dividing the data into data blocks; means (250, 240, 210) for transmitting the respective data blocks during respective first predetermined time periods, subject to refraining from transmitting portions of the data blocks coinciding with the second predetermined time periods; means (240) for retransmitting at least those data blocks transmitted during those first predetermined time periods which overlap any of the second predetermined time periods; and means (260) for reordering the data in the retransmitted data blocks prior to the retransmission. ### Claim 7 (depends on 6) Apparatus as claimed in claim 6, wherein the means for reordering (260) is adapted to apply predetermined reordering. ### Claim 8 (depends on 7) Apparatus as claimed in claim 7, wherein the predetermined reordering comprises at least one of: pseudo-random reordering; a cyclic shift; subdividing the data block into two parts and swapping the two parts. ### Claim 9 (depends on 6) Apparatus as claimed in claim 6, wherein the means for reordering (260) is adapted to select the reordering such that the portion of any data block coinciding with any of the second predetermined time periods does not coincide with any of the second predetermined time periods during the retransmission of that data block. ### Claim 10 (depends on 6) Apparatus as claimed in claim 6, further comprising means (240) for encoding such that the data in the data blocks comprises parity check bits, and the retransmitted data blocks comprise parity check bits which differ from those in the preceding transmission of the data blocks. ### Claim 11 (depends on 6) A communication system employing first predetermined time periods for the transmission of data and second predetermined time periods for transmission gaps, the communication system comprising a first apparatus (200) as claimed in claim 6 for transmitting data, and a second apparatus (300) comprising means (370) for receiving the transmitted and retransmitted data blocks, means (340) for recovering the data from the received data blocks, and means (360) adapted to reorder the recovered data to restore the initial order of the data.