Method and apparatus for supporting direct link communication in tdd cdma system
First Claim
1. A method for supporting P2P (Peer to Peer) communication between two user equipments in TDD CDMA systems, performed by user equipment, comprising:
- receiving signals transferred via the downlink control channel by network system;
acquiring the timeslot allocation information according to the received signals;
acquiring the spreading code allocation information of other active user equipments allocated in the specific downlink timeslot associated with the direct link used by said user equipments, according to the received signals; and
reducing the interference caused by signals transferred via downlink from network system to said other user equipments during P2P communication according to the acquired timeslot allocation information and spreading code allocation information.
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Accused Products
Abstract
A method for supporting P2P communication between two user equipments in TDD CDMA systems, performed by user equipment, comprising: receiving signals transferred via the downlink control channel from network system; acquiring the timeslot allocation information and the spreading code allocation information of other active user equipments allocated in the specific downlink timeslot associated with the direct link used by said user equipments, according to the received signals; and synchronizing the P2P communication signals received by the user equipment and signals from network system, according to the acquired timeslot allocation information and spreading code allocation information, so as to reduce the interference caused by the downlink signals transmitted from network system to other user equipments during the P2P communication process.
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Citations
22 Claims
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1. A method for supporting P2P (Peer to Peer) communication between two user equipments in TDD CDMA systems, performed by user equipment, comprising:
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receiving signals transferred via the downlink control channel by network system;
acquiring the timeslot allocation information according to the received signals;
acquiring the spreading code allocation information of other active user equipments allocated in the specific downlink timeslot associated with the direct link used by said user equipments, according to the received signals; and
reducing the interference caused by signals transferred via downlink from network system to said other user equipments during P2P communication according to the acquired timeslot allocation information and spreading code allocation information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for supporting P2P communication between two user equipments in TDD CDMA systems, the steps taken by network system comprising:
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sending the timeslot allocation information to the two users equipment conducting P2P communication via downlink control channel;
generating spreading code allocation information corresponding to each downlink timeslot of timeslot allocation information; and
sending said spreading code allocation information to the two user equipments via downlink control channel respectively, in order to synchronize the P2P communication signals received by each of the two UE with the signals from network system. - View Dependent Claims (12)
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13. A user equipment for supporting P2P (Peer to Peer) communication in TDD CDMA systems, comprising:
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a signal transceiver, for receiving and transmitting radio signals;
a timeslot allocation information acquiring means for acquiring the timeslot allocation information according to the information transferred via downlink control channel;
a spreading code allocation information acquiring means for acquiring the spreading code allocation information of other active user equipments in a specific downlink timeslot which is used when the UE is receiving signals via the direct link between the UE and the other one, according to the information transferred via downlink control channel; and
a interference reducing means for reducing the interference caused by downlink signals transmitted from network system to other user equipments during P2P communication process according to the acquired timeslot allocation information and spreading code allocation information. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A network system for supporting P2P communication between two user equipments in TDD CDMA systems, comprising:
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a timeslot allocation information sending means for sending the timeslot allocation information to the two user equipments in P2P communication via downlink control channel;
a spreading code allocation information generating means for generating the spreading code allocation information corresponding to each downlink timeslot in the timeslot allocation information; and
a spreading code allocation information sending means for sending the spreading code allocation information to the two user equipments via downlink control channel respectively, so as to synchronize the P2P communication signals received by each of the two UEs with signals from network systems. - View Dependent Claims (22)
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Specification