Methods and Arrangements in a Radio Access Network
2 Assignments
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Accused Products
Abstract
The present invention relates to methods and arrangements that enable easy integration of on/off repeaters in a radio access network and a minimized signaling for the UE repeater selection. This is achieved by a solution where the RBSs are working in a pre-coding mode and where the repeaters are measuring the downlink reference signals, selecting pre-coding matrices and feeding the index of selection back (i.e. the PMI) to the RBS, in analogy with what a UE does. This allows the RBS to distinguish the UE repeater selection, without introducing any extra uplink report or interaction between UEs and repeaters, by comparing the index from the UE with the indices from different repeaters.
27 Citations
40 Claims
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1-20. -20. (canceled)
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21. A method implemented by a radio base station working in a pre-coding mode for repeater selection in a radio access network, wherein the radio base station is configured to use at least one repeater and to serve at least one user equipment, UE, said method comprising
broadcasting reference signals, receiving one or more pre-coding matrix indices from the at least one repeater, storing the one or more pre-coding matrix indices received from the at least one repeater, receiving a pre-coding matrix index from the at least one UE, comparing the pre-coding matrix index received from the at least one UE with the one or more stored pre-coding matrix indices, and when a stored pre-coding matrix index matches the pre-coding matrix index received from the at least one UE, determining the repeater that corresponds to that matching index as a repeater selection of the at least one UE.
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26. A method implemented by a repeater for repeater selection in a radio access network, wherein the repeater is used by a radio base station working in a pre-coding mode, said method comprising:
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measuring reference signals received from the radio base station, selecting a pre-coding matrix based on the measured reference signals, and transmitting an index of the selected pre-coding matrix to the radio base station that is used by the radio base station to determine the repeater selection for a user equipment. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A radio base station of a radio access network, wherein the radio base station is configured to work in a pre-coding mode, to use at least one repeater, and to serve at least one user equipment, UE, and wherein said radio base station is further configured to:
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broadcast reference signals, receive one or more pre-coding matrix indices from the at least one repeater, store the one or more pre-coding matrix indices received from the at least one repeater, receive a pre-coding matrix index from the at least one UE, compare the pre-coding matrix index received from the at least one UE with the one or more stored pre-coding matrix indices, to find a repeater with a matching stored index, and determine the repeater that corresponds to the matching stored index as a repeater selection of the at least one UE. - View Dependent Claims (33, 34, 35, 36)
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37. A repeater of a radio access network, configured to be used by a radio base station working in a pre-coding mode, and further configured to:
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measure reference signals received from the radio base station, select a pre-coding matrix based on the measured reference signals, and transmit an index of the selected pre-coding matrix to the radio base station that is used by the radio base station to determine the repeater selection for a user equipment. - View Dependent Claims (38, 39, 40)
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Specification