METHOD AND APPARATUS FOR IMPROVING ACCURACY OF TRANSMITTING CSI VIA PUCCH
The present invention discloses a method and apparatus for improving the accuracy of transmitting CSI via PUCCH. The method for improving the accuracy of transmission of channel status information via the physical uplink control channel comprises reducing the number of bits of other channel information transmitted via the physical uplink control channel under the condition that the payload of the physical uplink control channel remains unchanged, and utilizing the thus-saved bits to transmit the channel state information to reduce the degree of sub-sampling the channel state information and thereby improve the accuracy of transmission of the channel status information via the physical uplink control channel. According to the present invention, system performance loss can be reduced.
1 . A method for improving the accuracy of transmission of channel status information via physical uplink control channel, comprising stops of:
reducing the number of bits of other channel information transmitted via the physical uplink control channel under the condition that the payload of the physical uplink control channel remains unchanged, and utilizing the thus-saved bits to transmit the channel state information to reduce the degree of sub-sampling the channel state information and thereby improve the accuracy of transmission of the channel status information via the physical uplink control channel.
2 . The method according to claim 1 , further comprising:
storing a first table, the first table recording other channel information that should be transmitted via the physical uplink control channel after sub-sampling other channel information transmitted via the physical uplink control channel and thereby reducing the number of the bits of other channel information transmitted via the physical uplink control channel.
3 . The method according to claim 1 , further comprising:
storing a second table, the second table recording the channel state information that should be transmitted via the physical uplink control channel after sub-sampling the channel state information.
4 . The method according to claim 1 , wherein said other channel information comprises channel quality indicator and/or spatial differential channel quality indicator.
5 . The method according to claim 1 , wherein said channel state information comprises code words of Codebook 1 and Codebook 2.
6 . An apparatus for improving the accuracy of transmission of channel status information via physical uplink control channel, comprising:
transmitting means configured to reduce the number of bits of other channel information transmitted via the physical uplink control channel under the condition that the payload of the physical uplink control channel remains unchanged, and to utilize the thus-saved bits to transmit the channel state information to reduce the degree of sub-sampling the channel state information and thereby improve the accuracy of transmission of the channel status information via the physical uplink control channel.
7 . The apparatus according to claim 6 , further comprising:
a first storage means configured to store a first table, the first table recording other channel information that should be transmitted via the physical uplink control channel after sub-sampling other channel information transmitted via the physical uplink control channel and thereby reducing the number of the bits of other channel information transmitted via the physical uplink control channel.
8 . The apparatus according to claim 6 , further comprising:
a second storage means configured to store a second table, the second table recording the channel state information that should be transmitted via the physical uplink control channel after sub-sampling the channel state information.
9 . The apparatus according to claim 6 , wherein said other channel information comprises channel quality indicator and/or spatial differential channel quality indicator.
10 . The apparatus according to claim 6 , wherein said channel state information comprises code words of Codebook 1 and Codebook 2.