Telecommunications apparatus and methods
First Claim
Patent Images
1. A wireless communications system for transmitting data to and/or receiving data from mobile terminals, the wireless communications system comprising:
- one or more base stations, each of which includes a transmitter and a receiver configured to provide a wireless access interface for communicating data to and/or from the mobile terminals, the wireless access interface providing a plurality of communications resource elements across a first frequency range,wherein the wireless access interface provided by the one or more base stations includes a plurality of time divided sub-frames, and at least one of the sub-frames includes;
a first control region in a first part of the sub-frame for communicating first signaling information to one or more of the mobile terminals, the first control region including a plurality of control channel resource elements, a first subset of said control channel resource elements providing a group control channel, the group control channel being associated with a group identifier and at least partially encoded using the group identifier, anda second control region in a second part of the sub-frame, distinct from the first part of the sub-frame, the second control region being for communicating second signaling information to a predetermined group of the mobile terminals,the group control channel contains information indicative of the location of the second control region, said information being accessible by applying the group identifier to the group control channel and each of the predetermined group of mobile terminals uses the group identifier, andthe group identifier is deduced from a relationship between a first preamble signature indicated in a random access preamble message received by a base station from a terminal and a second preamble signature indicated in a random access response message transmitted by the base station to the terminal in reply to the random access preamble message.
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Abstract
A group-based PDCCH capability is proposed in LTE. In particular, information common to a group of UEs, such as those common to a virtual carrier, may be signalled in a group search space within the PDCCH. This common information may include the location of a further control region embedded in the virtual carrier which contains UE-specific information for access the resources of the virtual carrier. Additional methods are introduced for assigning UEs a group identity by implicit signalling, and for determining the aggregation level of the group-based PDCCH search space.
23 Citations
23 Claims
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1. A wireless communications system for transmitting data to and/or receiving data from mobile terminals, the wireless communications system comprising:
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one or more base stations, each of which includes a transmitter and a receiver configured to provide a wireless access interface for communicating data to and/or from the mobile terminals, the wireless access interface providing a plurality of communications resource elements across a first frequency range, wherein the wireless access interface provided by the one or more base stations includes a plurality of time divided sub-frames, and at least one of the sub-frames includes; a first control region in a first part of the sub-frame for communicating first signaling information to one or more of the mobile terminals, the first control region including a plurality of control channel resource elements, a first subset of said control channel resource elements providing a group control channel, the group control channel being associated with a group identifier and at least partially encoded using the group identifier, and a second control region in a second part of the sub-frame, distinct from the first part of the sub-frame, the second control region being for communicating second signaling information to a predetermined group of the mobile terminals, the group control channel contains information indicative of the location of the second control region, said information being accessible by applying the group identifier to the group control channel and each of the predetermined group of mobile terminals uses the group identifier, and the group identifier is deduced from a relationship between a first preamble signature indicated in a random access preamble message received by a base station from a terminal and a second preamble signature indicated in a random access response message transmitted by the base station to the terminal in reply to the random access preamble message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A network element for a mobile communications network for transmitting data to and/or receiving data from mobile terminals, the network element comprising:
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a transmitter and a receiver configured to provide a wireless access interface for communicating data to and/or from the mobile terminals, the wireless access interface providing a plurality of communications resource elements across a first frequency range, wherein the wireless access interface provided by the network element includes a plurality of time divided sub-frames, and at least one of the sub-frames includes; a first control region in a first part of the sub-frame for communicating first signaling information to one or more of the mobile terminals, the first control region including a plurality of control channel resource elements, a first subset of said control channel resource elements providing a group control channel, the group control channel being associated with a group identifier and at least partially encoded using the group identifier, and a second control region in a second part of the sub-frame, distinct from the first part of the sub-frame, the second control region being for communicating second signaling information to a predetermined group of the mobile terminals, the group control channel contains information indicative of the location of the second control region, said information being accessible by applying the group identifier to the group control channel and each of the predetermined group of mobile terminals uses the group identifier, and the group identifier is deduced from a relationship between a first preamble signature indicated in a random access preamble message received by a base station from a terminal and a second preamble signature indicated in a random access response message transmitted by the base station to the terminal in reply to the random access preamble message. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of operating a wireless communications system for transmitting data to and/or receiving data from mobile terminals, the method comprising:
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providing a plurality of communications resource elements across a first frequency range, wherein the plurality of communications resource elements are arranged in a plurality of time divided sub-frames, and at least one of the sub-frames includes; a first control region in a first part of the sub-frame for communicating first signaling information to one or more of the mobile terminals, the first control region including a plurality of control channel resource elements, a first subset of said control channel resource elements providing a group control channel, the group control channel being associated with a group identifier and at least partially encoded using the group identifier, and a second control region in a second part of the sub-frame, distinct from the first part of the sub-frame, the second control region being for communicating second signaling information to a predetermined group of the mobile terminals, the group control channel contains information indicative of the location of the second control region, said information being accessible by applying the group identifier to the group control channel and each of the predetermined group of mobile terminals uses the group identifier, and the group identifier is deduced from a relationship between a first preamble signature indicated in a random access preamble message received by a base station from a terminal and a second preamble signature indicated in a random access response message transmitted by the base station to the terminal in reply to the random access preamble message.
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Specification