Method, System, and Apparatus for Determining Uplink Transmission Power in Time Division Duplex System
First Claim
1. A method for determining uplink transmission power in a Time Division Duplex system, comprising:
- determining, by a User Equipment, a current uplink and downlink sub-frame allocation mode before transmitting data using an uplink sub-frame, obtaining a sub-frame mapping corresponding to the uplink and downlink sub-frame allocation mode, determining a downlink sub-frame used by a base station for transmitting a Transmission Power Control, TPC, command corresponding to the uplink sub-frame according to the sub-frame mapping, obtaining the TPC command received through the determined downlink sub-frame, and determining power for data transmission via the uplink sub-frame according to the TPC command;
wherein, the TPC command corresponding to the uplink sub-frame is transmitted by the base station through the downlink sub-frame after the base station determines the current uplink and downlink sub-frame allocation mode, obtains the sub-frame mapping corresponding to the uplink and downlink sub-frame allocation mode, and determines the downlink sub-frame used for transmitting the TPC command corresponding to the uplink sub-frame according to the sub-frame mapping.
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Accused Products
Abstract
A method for determining uplink transmission power in time division duplex system is disclosed: a base station determines the current distribution manner of uplink and downlink sub-frames, acquires the frame correspondence information that corresponds to the distribution manner of said uplink and downlink sub-frames, selects, based on said frame correspondence information, downlink sub-frames to transmit to a terminal the power control (TPC) commands that correspond to the uplink sub-frames. Before using the uplink sub-frames to transmit data, the terminal determines the current distribution manner of uplink and downlink sub-frames, acquires the frame correspondence information that corresponds to the distribution manner of said uplink and downlink sub-frames, determines, based on the frame correspondence information, the downlink sub-frames that are used for transmitting the TPC commands; acquires the TPC commands received by the downlink sub-frames, and determines the data transmission power of the uplink sub-frames based on said TPC commands. The present invention also discloses a time division duplex data transmission system and an apparatus therefor. With the present invention, a time division duplex system can transmit and receive TPC commands based on the frame correspondence information, thereby enabling correct and effective uplink power control performance.
24 Citations
20 Claims
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1. A method for determining uplink transmission power in a Time Division Duplex system, comprising:
determining, by a User Equipment, a current uplink and downlink sub-frame allocation mode before transmitting data using an uplink sub-frame, obtaining a sub-frame mapping corresponding to the uplink and downlink sub-frame allocation mode, determining a downlink sub-frame used by a base station for transmitting a Transmission Power Control, TPC, command corresponding to the uplink sub-frame according to the sub-frame mapping, obtaining the TPC command received through the determined downlink sub-frame, and determining power for data transmission via the uplink sub-frame according to the TPC command;
wherein, the TPC command corresponding to the uplink sub-frame is transmitted by the base station through the downlink sub-frame after the base station determines the current uplink and downlink sub-frame allocation mode, obtains the sub-frame mapping corresponding to the uplink and downlink sub-frame allocation mode, and determines the downlink sub-frame used for transmitting the TPC command corresponding to the uplink sub-frame according to the sub-frame mapping.- View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 17, 18)
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4. (canceled)
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10. (canceled)
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11. A base station, comprising:
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a structure unit configured to determine a current uplink and downlink sub-frame allocation mode, and obtain a sub-frame mapping corresponding to the uplink and downlink sub-frame allocation mode; a selection unit configured to select, according to the sub-frame mapping, a downlink sub-frame to be used for transmitting a Transmission Power Control command corresponding to a uplink sub-frame to a User Equipment; and a transmission unit configured to transmit the Transmission Power Control command to the User Equipment via the selected downlink sub-frame. - View Dependent Claims (12, 13, 19)
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14. A User Equipment, comprising:
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an information unit configured to determine a current uplink and downlink sub-frame allocation mode before transmitting data using an uplink sub-frame, and obtain a sub-frame mapping corresponding to the uplink and downlink sub-frame allocation mode; a sub-frame unit configured to determine a downlink sub-frame used for transmitting the Transmission Power Control command corresponding to the uplink sub-frame according to the sub-frame mapping; an instruction unit configured to obtain the Transmission Power Control command received through the determined downlink sub-frame; and a power unit configured to determine the power for data transmission via the uplink sub-frame according to the Transmission Power Control command. - View Dependent Claims (15, 16, 20)
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Specification