Duplex operation in a cellular communication system
First Claim
1. A base station for supporting at least a first user equipment (UE) of a plurality of UEs in a cellular communication system, the base station comprising:
- a controller arranged to broadcast base station duplex capability information to the plurality of UEs, using a common transmission format, wherein the base station duplex capability information indicates a duplex capability related to uplink and downlink carrier capability of the base station, the common transmission format having a signal structure common to a plurality of duplex modes; and
a receiver arranged to receive an initial access message from the at least first UE if there is a match between a duplex capability of the first UE and the duplex capability of the base station, whereina first of the plurality of duplex modes is a frequency division duplex (FDD) mode using paired uplink and downlink frequency carriers such that a same carrier frequency is not used for both uplink and downlink and a second of the plurality of duplex modes is a time division duplex (TDD) mode using a single frequency carrier for uplink and downlink, andthe base station receives the initial access message sent in the uplink frequency carrier for the FDD mode or the single frequency carrier for the TDD mode depending on a matched duplex mode.
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Accused Products
Abstract
A cellular communication system comprises a first base station serving at least a first user equipment. The base station comprises functionality for transmitting a base station duplex capability message to user equipments using a transmission format which is common to a plurality of duplex modes. A first user equipment comprises a transceiver which receives the base station duplex capability message. A RACH characteristics processor determines at least one transmit characteristic for an access message in response to the base station duplex capability message and a RACH transmit controller controls the transmission of an access message to the first base station in response to the at least one transmit characteristic.
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Citations
30 Claims
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1. A base station for supporting at least a first user equipment (UE) of a plurality of UEs in a cellular communication system, the base station comprising:
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a controller arranged to broadcast base station duplex capability information to the plurality of UEs, using a common transmission format, wherein the base station duplex capability information indicates a duplex capability related to uplink and downlink carrier capability of the base station, the common transmission format having a signal structure common to a plurality of duplex modes; and a receiver arranged to receive an initial access message from the at least first UE if there is a match between a duplex capability of the first UE and the duplex capability of the base station, wherein a first of the plurality of duplex modes is a frequency division duplex (FDD) mode using paired uplink and downlink frequency carriers such that a same carrier frequency is not used for both uplink and downlink and a second of the plurality of duplex modes is a time division duplex (TDD) mode using a single frequency carrier for uplink and downlink, and the base station receives the initial access message sent in the uplink frequency carrier for the FDD mode or the single frequency carrier for the TDD mode depending on a matched duplex mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A user equipment (UE) in a cellular communication system, the UE comprising:
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a controller arranged to receive base station duplex capability information broadcast by a base station, wherein the base station duplex capability information indicates a duplex capability related to uplink and downlink carrier capability of the base station, and the base station duplex capability information uses a signal structure that is common to a plurality of duplex modes; a compatibility processor arranged to determine a duplex capability of the base station from the base station duplex capability information, and arranged to evaluate a match criterion between a duplex capability of the user equipment and the duplex capability of the base station; and if the match criterion is met the controller is arranged to transmit the an initial access message to the base station using a matched duplex mode, and a first of the plurality of duplex modes is a frequency division duplex (FDD) mode using paired uplink and downlink frequency carriers such that a same carrier frequency is not used for both uplink and downlink and a second of the plurality of duplex modes is a time division duplex (TDD) mode using a single frequency carrier for uplink and downlink, the single frequency carrier is different from the paired uplink and downlink frequency carriers, and the initial access message is send in the uplink frequency carrier for the FDD mode or the single frequency carrier for the TDD mode depending on the matched duplex mode. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A method of operation for a base station in a cellular communication system, the method comprising:
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serving at least a first user equipment (UE) of a plurality of UEs; broadcasting base station duplex capability information to the at least first UE using a common transmission format having a signal structure common to a plurality of duplex modes, wherein the base station duplex capability information indicates a duplex capability related to uplink and downlink carrier capability of the base station; and receiving an initial access message from the at least first UE if there is a match between a duplex capability of the first UE and a duplex capability of the base station, wherein a first of the plurality of duplex modes is a frequency division duplex (FDD) mode using paired uplink and downlink frequency carriers such that a same carrier frequency is not used for both uplink and downlink and a second of the plurality of duplex modes is a time division duplex (TDD) mode using a single frequency carrier for uplink and downlink, the single frequency carrier being different from the paired uplink and downlink frequency carriers, and the initial access message is received in the uplink frequency carrier for the FDD mode or the single frequency carrier for the TDD mode depending on a matched duplex mode. - View Dependent Claims (25, 26, 27)
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28. A method of operation for a user equipment (UE) in a cellular communication system supporting a plurality of UEs, the method comprising:
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receiving base station duplex capability information broadcast by a base station, wherein the base station duplex capability information indicates a duplex capability related to uplink and downlink carrier capability of the base station, and the base station duplex capability information uses a common transmission format having a signal structure common to a plurality of duplex modes; determining a duplex capability of the base station from the base station duplex capability information; evaluating a match criterion between a duplex capability of the UE and the duplex capability of the base station; and transmitting an initial access message to the base station using a matched duplex mode if the match criterion is met, wherein a first of the plurality of duplex modes is a frequency division duplex mode (FDD) using paired uplink and downlink frequency carriers such that a same carrier frequency is not used for both uplink and downlink and a second of the plurality of duplex modes is a time division duplex (TDD) mode using a single frequency carrier for uplink and downlink, the single frequency carrier being different from the paired uplink and downlink frequency carriers, and the initial access message is sent in the uplink frequency carrier for the FDD mode or the single frequency carrier for the TDD mode depending on the matched duplex mode. - View Dependent Claims (29, 30)
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Specification