A transmission method for use in a two-hop wireless communication system is provided. The system includes a source apparatus, a destination apparatus and an intermediate apparatus. The source apparatus is operable to transmit information along two links forming a communication path extending from th
A transmission method for use in a two-hop wireless communication system is provided. The system includes a source apparatus, a destination apparatus and an intermediate apparatus. The source apparatus is operable to transmit information along two links forming a communication path extending from the source apparatus to the destination apparatus via the intermediate apparatus. The intermediate apparatus is operable to receive information from the source apparatus and to transmit the received information to the destination apparatus. The system has access to a time-frequency format for use in assigning available transmission frequency bandwidth during a discrete transmission interval, said format defining a plurality of transmission windows within such an interval. Each window occupies a different part of that interval and has a frequency bandwidth profile within said available transmission frequency bandwidth over its part of that interval. Furthermore, each said window is assignable for such a transmission interval to said source or intermediate apparatus for use in transmission. The transmission method for use in this system includes employing said format to transmit information along the path as two successive transmission signals, link by link, said signals being transmitted using different transmission windows of a particular such transmission interval.
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1. A transmission method for use in a two-hop time-division-duplex wireless communication system, the system comprising a source apparatus, destination apparatuses and an intermediate apparatus, said source apparatus being configured to transmit information along two links forming an indirect commun
1. A transmission method for use in a two-hop time-division-duplex wireless communication system, the system comprising a source apparatus, destination apparatuses and an intermediate apparatus, said source apparatus being configured to transmit information along two links forming an indirect communication path extending from the source apparatus to at least one of the destination apparatuses via the intermediate apparatus, and the intermediate apparatus being configured to receive information from the source apparatus and to transmit the received information to the at least one destination apparatus, a time-frequency format for downlink and uplink subframes used for transmission in the system in discrete transmission periods, each discrete transmission period being a single downlink or a single uplink subframe with a plurality of transmission zones within each transmission period, each zone occupying a different part of that period, and being assignable to said source or intermediate apparatus for use in transmission, the method comprising: transmitting information along the path as two successive transmission signals, link by link, said signals being transmitted using different zones of a particular transmission period; wherein:a control information zone in the particular transmission period is used for broadcast of control information from said source apparatus to said intermediate apparatus and said destination apparatuses;a first zone in the particular transmission period is used for transmission from said source apparatus to said intermediate apparatus and a second, subsequent zone in the particular transmission period is used for transmission from said intermediate apparatus to the at least one destination apparatus;said first and second transmission zones of the transmission period are either side in time of a third transmission zone of the transmission period, which is used for transmission along a single link forming a direct communication path from said source apparatus to another destination apparatus, and in which there is no transmission or reception by the intermediate apparatus, but processing is performed in said intermediate apparatus, so as to configure the information for transmission in the second transmission zone based upon the information received in the first transmission zone;said second zone is also used for direct transmission along a single link forming a direct communication path from said source apparatus to a further destination apparatus on the downlink; andsaid control information enables said intermediate apparatus and said destination apparatuses to receive transmissions in said first zone and said second zone, the method further comprising:employing said first transmission zone to transmit information from the source apparatus to a still further destination apparatus along a single link forming a direct communication path, so that information is transmitted from the source apparatus to both said intermediate apparatus and said still further destination apparatus during the part of the particular transmission period corresponding to the first transmission zone;determining whether the destination apparatuses can receive the control information from the source apparatus and adding an extra control information zone in the particular transmission period for broadcast of control information from said intermediate apparatus to said destination apparatus based on the determination. 2. The transmission method according to claim 1, wherein said control zone occupies a part of the transmission period preceding the part of the transmission period occupied by the first transmission zone. 3. The transmission method according claim 1, comprising: employing said second transmission zone to transmit information from the source apparatus to the said further destination apparatus along the direct communication path, so that information is transmitted from said intermediate apparatus to said destination apparatus and from the source apparatus to said further destination apparatus during the part of the transmission period corresponding to the second transmission zone. 4. The transmission method according to claim 1, comprising: employing said third transmission zone to transmit information from another source apparatus to said at least one of the destination apparatuses along a direct communication path, so that information is transmitted from that another source apparatus during said processing in the intermediate apparatus. 5. The transmission method according to claim 1, comprising: employing said first transmission zone to transmit information from another source apparatus to said at least one of the destination apparatuses along a direct communication path, so that information is transmitted from the source apparatus to said intermediate apparatus and from that another source apparatus to said at least one of the destination apparatuses during the part of the transmission period corresponding to the first transmission zone. 6. The transmission method according claim 1, comprising: employing said second transmission zone to transmit information from another source apparatus to said at least one of the destination apparatuses along the direct communication path, so that information is transmitted from said intermediate apparatus to said at least one of the destination apparatuses and from that another source apparatus to said at least one of the destination apparatuses during the part of the transmission period corresponding to the second transmission zone. 7. The transmission method according to claim 1, comprising employing a space division multiple access technique in one or more of said transmission zones of the transmission period. 8. The transmission method according to claim 1, wherein said system is an OFDM or OFDMA system, and wherein the time-frequency format is a format for an OFDM or OFDMA downlink or uplink sub-frame of an OFDM or OFDMA time-division-duplex frame. 9. The transmission method according to claim 1, wherein each said discrete transmission period is a sub-frame period. 10. The transmission method according to claim 1, wherein each said transmission zone comprises a zone in an OFDM or OFDMA frame structure. 11. The transmission method according to claim 1, wherein the or each source apparatus is a base station. 12. The transmission method according to claim 1, wherein the or each source apparatus is a user terminal. 13. The transmission method according to claim 1, wherein the or each destination apparatus is a base station. 14. The transmission method according to claim 1, wherein the or each destination apparatus is a user terminal. 15. The transmission method according to claim 1, wherein the or each intermediate apparatus is a relay station. 16. A two-hop wireless time-division-duplex communication system, the system comprising: a source apparatus, destination apparatuses and an intermediate apparatus, said source apparatus being configured to transmit information along two links forming an indirect communication path extending from the source apparatus to at least one of the destination apparatus via the intermediate apparatus, and the intermediate apparatus being configured to receive information from the source apparatus and to transmit the received information to the at least one destination apparatus;the system using a time-frequency format for downlink and uplink subframes for transmission in the system in discrete transmission periods, each discrete transmission period being a single downlink or a single uplink subframe with a plurality of transmission zones within each transmission period, each zone occupying a different part of that period and being assignable to said source or intermediate apparatus for use in transmission; and further comprisinga transmitter configured to employ said format to transmit information along the relayed path as two successive transmission signals, link by link, using transmission zones of a particular transmission period, whereina control information zone in the particular transmission period is used for broadcast of control information from said source apparatus to said intermediate apparatus and said destination apparatuses;a first zone in the particular transmission period is used for transmission from said source apparatus to said intermediate apparatus and a second, subsequent zone in the particular transmission period is used for transmission from said intermediate apparatus to the at least one destination apparatus;said first and second transmission zones of the transmission period are either side in time of a third transmission zone of the transmission period, which is used for transmission along a single link forming a direct communication path from said source apparatus to a further destination apparatus, and in which there is no transmission or reception by the intermediate apparatus, but processing is performed in said intermediate apparatus, so as to configure the information for transmission in the second transmission zone based upon the information received in the first transmission zone;said second zone is also used for direct transmission along a single link forming a direct communication path from said source apparatus to a further destination apparatus on the downlink; andsaid control information enables said intermediate apparatus and said destination apparatuses to receive transmissions in said first zone and said second zone; and whereinsaid first transmission zone is used to transmit information from the source apparatus to a still further destination apparatus along a single link forming a direct communication path, so that information is transmitted from the source apparatus to both said intermediate apparatus and said still further destination apparatus during the part of the particular transmission period corresponding to the first transmission zone;wherein the system further comprises a processor that determines whether the destination apparatuses can receive the control information from the source apparatus and adding an extra control information zone in the particular transmission period for broadcast of control information from said intermediate apparatus to said destination apparatus based on the determination. 17. Non-transitory computer-readable media storing computer programs which, when executed on computing devices of a two-hop wireless time-division-duplex communication system, causes the system to carry out a transmission method, the system comprising a source apparatus, destination apparatuses and an intermediate apparatus, said source apparatus being configured to transmit information along two links forming an indirect communication path extending from the source apparatus to at least one of the destination apparatuses via the intermediate apparatus, and the intermediate apparatus being configured to receive information from the source apparatus and to transmit the received information to the at least one destination apparatus, a time-frequency format for downlink and uplink subframes used for transmission in the system in discrete transmission periods, each discrete transmission period being a single downlink or a single uplink subframe with a plurality of transmission zones within each transmission period, each zone occupying a different part of that period, and being assignable to said source or intermediate apparatus for use in transmission, the method comprising: transmitting information along the relayed path as two successive transmission signals, link by link, said signals being transmitted using different zones of a particular transmission period; wherein:a control information zone in the particular transmission period is used for broadcast of control information from said source apparatus to said intermediate apparatus and said destination apparatuses;a first zone in the particular transmission period is used for transmission from said source apparatus to said intermediate apparatus and a second, subsequent zone in the particular transmission period is used for transmission from said intermediate apparatus to the at least one destination apparatus;said first and second transmission zones of the transmission period are either side in time of a third transmission zone of the transmission period, which is used for transmission along a single link forming a direct communication path from said source apparatus to another destination apparatus, and in which there is no transmission or reception by the intermediate apparatus, but processing is performed in said intermediate apparatus, so as to configure the information for transmission in the second transmission zone based upon the information received in the first transmission zone;said second zone is also used for direct transmission along a single link forming a direct communication path from said source apparatus to a further destination apparatus on the downlink, andsaid control information enables said intermediate apparatus and said destination apparatuses to receive transmissions in said first zone and said second zone, the method further comprising:employing said first transmission zone to transmit information from the source apparatus to a still further destination apparatus along a single link forming a direct communication path, so that information is transmitted from the source apparatus to both said intermediate apparatus and said still further destination apparatus during the part of the particular transmission period corresponding to the first transmission zone;determining whether the destination apparatuses can receive the control information from the source apparatus and adding an extra control information zone in the particular transmission period for broadcast of control information from said intermediate apparatus to said destination apparatus based on the determination. 18. An intermediate apparatus for use in a two-hop wireless time-division-duplex communication system, the system further comprising a source apparatus, and destination apparatuses, said source apparatus being configured to transmit information along a series of links forming an indirect communication path extending from the source apparatus to at least one of the destination apparatuses via the intermediate apparatus, and the intermediate apparatus being configured to receive information from a previous apparatus along the path and to transmit the received information to a subsequent apparatus along the path, the system using a time-frequency format for downlink and uplink subframes for transmission in the system in discrete transmission periods, each discrete transmission period being a single downlink or a single uplink subframe with a plurality of transmission zones within each transmission period, each zone occupying a different part of that period and being assignable to said source or intermediate apparatus for use in transmission; and the intermediate apparatus comprising: a transmitter configured to employ said format for one transmission period to receive information in a first zone window of said period and to transmit said information in a second, subsequent transmission zone during the same transmission period such that said information passes along the two links in a single transmission period; whereina control information zone in the particular transmission period is used for broadcast of control information from said source apparatus to said intermediate apparatus and said destination apparatuses;said first zone in the particular transmission period is used for transmission from said source apparatus to said intermediate apparatus and said second, subsequent zone in the particular transmission period is used for transmission from said intermediate apparatus to the at least one destination apparatus;said first and second transmission zones of the transmission period are either side in time of a third transmission zone of the transmission period, which is used for transmission along a single link forming a direct communication path from said source apparatus to another destination apparatus, and in which there is no transmission or reception by the intermediate apparatus, but processing is performed in said intermediate apparatus, so as to configure the information for transmission in the second transmission zone based upon the information received in the first transmission zone;said second zone is also used for direct transmission along a single link forming a direct communication path from said source apparatus to a further destination apparatus on the downlink;said control information enables said intermediate apparatus and said destination apparatuses to receive transmissions in said first zone and said second zone; andsaid first transmission zone is used to transmit information from the source apparatus to a still further destination apparatus along a single link forming a direct communication path, so that information is transmitted from the source apparatus to both said intermediate apparatus and said still further destination apparatus during the part of the particular transmission period corresponding to the first transmission zone;wherein the system further comprises a processor that determines whether the destination apparatuses can receive the control information from the source apparatus and adding an extra control information zone in the particular transmission period for broadcast of control information from said intermediate apparatus to said destination apparatus based on the determination. 19. A transmission method for use in an intermediate apparatus of a two-hop wireless time-division-duplex communication system, the system further comprising a source apparatus and destination apparatuses, said source apparatus being configured to transmit information along two links forming an indirect communication path extending from the source apparatus to at least one of the destination apparatuses via the intermediate apparatus, and the intermediate apparatus being configured to receive information from the source apparatus and to transmit the received information to the at least one destination apparatus, the intermediate apparatus having access to a time-frequency format for downlink and uplink subframes used for transmission in the system in discrete transmission periods, each discrete transmission period being a single downlink or a single uplink subframe with a plurality of transmission zones within each transmission period, each zone occupying a different part of that period, and being assignable to said source or intermediate apparatus for use in transmission, the method comprising: employing said format for one such transmission period to receive information in a first zone of said interval and to transmit said information in a second zone during the same transmission period such that said information passes along the two links in a single transmission period; whereina control information zone in the particular transmission period is used for broadcast of control information from said source apparatus to said intermediate apparatus and said destination apparatuses;the first zone in the particular transmission period is used for transmission from said source apparatus to said intermediate apparatus and the second, subsequent zone in the particular transmission period is used for transmission from said intermediate apparatus to said destination apparatus;said first and second transmission zones of the transmission period are either side in time of a third transmission zone of the transmission period, which is used for transmission along a single link forming a direct communication path from said source apparatus to another destination apparatus, and in which there is no transmission or reception by the intermediate apparatus, but processing is performed in said intermediate apparatus, so as to configure the information for transmission in the second transmission zone based upon the information received in the first transmission zone;said second zone is also used for direct transmission along a single link forming a direct communication path from said source apparatus to a further destination apparatus on the downlink, andsaid control information enables said intermediate apparatus and said destination apparatuses to receive transmissions in said first zone and said second zone, the method further comprising:employing said first transmission zone to transmit information from the source apparatus to a still further destination apparatus along a single link forming a direct communication path, so that information is transmitted from the source apparatus to both said intermediate apparatus and said still further destination apparatus during the part of the particular transmission period corresponding to the first transmission zone;determining whether the destination apparatuses can receive the control information from the source apparatus and adding an extra control information zone in the particular transmission period for broadcast of control information from said intermediate apparatus to said destination apparatus based on the determination. 20. A non-transitory computer-readable media storing a computer program, which when executed on a computing device of an intermediate apparatus in a two-hop wireless time-division-duplex communication system, causes the intermediate apparatus to carry out a transmission method, the system further comprising a source apparatus and destination apparatuses, said source apparatus being configured to transmit information along two links forming an indirect communication path extending from the source apparatus to at least one of the destination apparatuses via the intermediate apparatus, and the intermediate apparatus being configured to receive information from the source apparatus and to transmit the received information to the at least one destination apparatus, the intermediate apparatus having access to a time-frequency format for downlink and uplink subframes used for transmission in the system in discrete transmission periods, each discrete transmission period being a single downlink or a single uplink subframe with a plurality of transmission zones within each transmission period, each zone occupying a different part of that period, and being assignable to said source or intermediate apparatus for use in transmission, the method comprising: employing said format for one such transmission period to receive information in a first zone of said interval and to transmit said information in a second zone during the same transmission period such that said information passes along the two links in a single transmission period; whereina control information zone in the particular transmission period is used for broadcast of control information from said source apparatus to said intermediate apparatus and said destination apparatuses;the first zone in the particular transmission period is used for transmission from said source apparatus to said intermediate apparatus and the second, subsequent zone in the particular transmission period is used for transmission from said intermediate apparatus to said destination apparatus;said first and second transmission zones of the transmission period are either side in time of a third transmission zone of the transmission period, which is used for transmission along a single link forming a direct communication path from said source apparatus to another destination apparatus, and in which there is no transmission or reception by the intermediate apparatus, but processing is performed in said intermediate apparatus, so as to configure the information for transmission in the second transmission zone based upon the information received in the first transmission zone;said second zone is also used for direct transmission along a single link forming a direct communication path from said source apparatus to a further destination apparatus on the downlink; andsaid control information enables said intermediate apparatus and said destination apparatuses to receive transmissions in said first zone and said second zone, the method further comprising:employing said first transmission zone to transmit information from the source apparatus to a still further destination apparatus along a single link forming a direct communication path, so that information is transmitted from the source apparatus to both said intermediate apparatus and said still further destination apparatus during the part of the particular transmission period corresponding to the first transmission zone;determining whether the destination apparatuses can receive the control information from the source apparatus and adding an extra control information zone in the particular transmission period for broadcast of control information from said intermediate apparatus to said destination apparatus based on the determination. 21. A source apparatus in a two-hop wireless time-division-duplex communication system, the system comprising the source apparatus, destination apparatuses and an intermediate apparatus, said source apparatus being configured to transmit information along two links forming an indirect communication path extending from the source apparatus to at least one of the destination apparatus via the intermediate apparatus, and the intermediate apparatus being configured to receive information from the source apparatus and to transmit the received information to the at least one destination apparatus, a time-frequency format for the downlink and uplink subframes used for transmission in the system in discrete transmission periods, each discrete transmission period being a single downlink or a single uplink subframe with a plurality of transmission zones within each transmission period, each zone occupying a different part of that period, and being assignable to said source or intermediate apparatus for use in transmission, the source apparatus comprising: a transmitter configured to transmit information along the path as a first of two successive transmission signals, in a first link, the first and another transmission signal being transmitted using different zones of a particular transmission period; wherein:a control information zone in the particular transmission period is used for broadcast of control information from said source apparatus to said intermediate apparatus and said destination apparatuses;a first zone in the particular transmission period is used for transmission from said source apparatus to said intermediate apparatus and a second, subsequent zone in the particular transmission period is used for transmission from said intermediate apparatus to the at least one destination apparatus;said first and second transmission zones of the transmission period are either side in time of a third transmission zone of the transmission period, which is used for transmission along a single link forming a direct communication path from said source apparatus to another destination apparatus, and in which there is no transmission or reception by the intermediate apparatus, but processing is performed in said intermediate apparatus, so as to configure the information for transmission in the second transmission zone based upon the information received in the first transmission zone;said second zone is also used for direct transmission along a single link forming a direct communication path from said source apparatus to a further destination apparatus on the downlink;said control information enables said intermediate apparatus and said destination apparatuses to receive transmissions in said first zone and said second zone; andsaid first transmission zone is used to transmit information from the source apparatus to a still further destination apparatus along a single link forming a direct communication path, so that information is transmitted from the source apparatus to both said intermediate apparatus and said still further destination apparatus during the part of the particular transmission period corresponding to the first transmission zone;wherein the system further comprises a processor that determines whether the destination apparatuses can receive the control information from the source apparatus and adding an extra control information zone in the particular transmission period for broadcast of control information from said intermediate apparatus to said destination apparatus based on the determination. 22. A transmission method for use in a source apparatus of a two-hop time-division-duplex wireless communication system, the system comprising: the source apparatus, destination apparatuses and an intermediate apparatus, said source apparatus being configured to transmit information along two links forming an indirect communication path extending from the source apparatus to at least one of the destination apparatuses via the intermediate apparatus, and the intermediate apparatus being configured to receive information from the source apparatus and to transmit the received information to the at least one destination apparatus; a time-frequency format for downlink and uplink subframes used for transmission in the system in discrete transmission periods, each discrete transmission period being a single downlink or a single uplink subframe with a plurality of transmission zones within each transmission period, each zone occupying a different part of that period, and being assignable to said source or intermediate apparatus for use in transmission, the method comprising:employing said format to transmit information along the path as a first of two successive transmission signals, in a first link, the first and another transmission signal being transmitted using different zones of a particular transmission period; wherein:a control information zone in the particular transmission period is used for broadcast of control information from said source apparatus to said intermediate apparatus and said destination apparatuses;a first zone in the particular transmission period is used for transmission from said source apparatus to said intermediate apparatus and a second, subsequent zone in the particular transmission period is used for transmission from said intermediate apparatus to the at least one destination apparatus;said first and second transmission zones of the transmission period are either side in time of a third transmission zone of the transmission period, which is used for transmission along a single link forming a direct communication path from said source apparatus to another destination apparatus, and in which there is no transmission or reception by the intermediate apparatus, but processing is performed in said intermediate apparatus, so as to configure the information for transmission in the second transmission zone based upon the information received in the first transmission zone;said second zone is also used for direct transmission along a single link forming a direct communication path from said source apparatus to a further destination apparatus on the downlink; andsaid control information enables said intermediate apparatus and said destination apparatuses to receive transmissions in said first zone and said second zone; the method further comprising:employing said first transmission zone to transmit information from the source apparatus to a still further destination apparatus along a single link forming a direct communication path, so that information is transmitted from the source apparatus to both said intermediate apparatus and said still further destination apparatus during the part of the particular transmission period corresponding to the first transmission zone;determining whether the destination apparatuses can receive the control information from the source apparatus and adding an extra control information zone in the particular transmission period for broadcast of control information from said intermediate apparatus to said destination apparatus based on the determination. 23. A non-transitory computer-readable media storing a computer program which when executed on a computing device of a source apparatus of a two hop time-division-duplex wireless communication system causes the source apparatus to carry out a transmission method, the system comprising: the source apparatus, destination apparatuses and an intermediate apparatus, said source apparatus being configured to transmit information along two links forming an indirect communication path extending from the source apparatus to at least one of the destination apparatuses via the intermediate apparatus, and the intermediate apparatus being configured to receive information from the source apparatus and to transmit the received information to the at least one destination apparatus;a time-frequency format for downlink and uplink subframes used for transmission in the system in discrete transmission periods, each discrete transmission period being a single downlink or a single uplink subframe with a plurality of transmission zones within each transmission period, each zone occupying a different part of that period, and being assignable to said source or intermediate apparatus for use in transmission, the method comprising:employing said format to transmit information along the path as a first of two successive transmission signals, in a first link, the first and another transmission signal being transmitted using different zones of a particular transmission period; wherein:a control information zone in the particular transmission period is used for broadcast of control information from said source apparatus to said intermediate apparatus and said destination apparatuses;a first zone in the particular transmission period is used for transmission from said source apparatus to said intermediate apparatus and a second, subsequent zone in the particular transmission period is used for transmission from said intermediate apparatus to the at least one destination apparatus;said first and second transmission zones of the transmission period are either side in time of a third transmission zone of the transmission period, which is used for transmission along a single link forming a direct communication path from said source apparatus to another destination apparatus, and in which there is no transmission or reception by the intermediate apparatus, but processing is performed in said intermediate apparatus, so as to configure the information for transmission in the second transmission zone based upon the information received in the first transmission zone;said second zone is also used for direct transmission along a single link forming a direct communication path from said source apparatus to a further destination apparatus on the downlink; andsaid control information enables said intermediate apparatus and said destination apparatuses to receive transmissions in said first zone and said second zone; the method further comprising:employing said first transmission zone to transmit information from the source apparatus to a still further destination apparatus along a single link forming a direct communication path, so that information is transmitted from the source apparatus to both said intermediate apparatus and said still further destination apparatus during the part of the particular transmission period corresponding to the first transmission zone;determining whether the destination apparatuses can receive the control information from the source apparatus and adding an extra control information zone in the particular transmission period for broadcast of control information from said intermediate apparatus to said destination apparatus based on the determination.
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Chae Hun Chung KR; Yang Soo Shin KR, Apparatus and method for expanding service area of CDMA mobile communication system.
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