Method for realizing frequency domain scheduling in the time division duplex system and the system thereof
First Claim
1. A method for achieving frequency domain scheduling in a time division duplex system, wherein the method comprising the steps of:
- a first device transmits a non pre-coded reference symbol to a second device;
from the reference symbol, the second device obtains a channel impulse response matrix experienced by the reference transmitted from the first device, and from the channel impulse response matrix, obtains linear spatial domain pre-coding matrix used in the candidate physical resource blocks to transmit data to the first device;
from the channel impulse response matrix and the linear spatial domain pre-coding matrix, the second device obtains the channel quality indication of the candidate physical resource blocks;
the frequency domain scheduling is performed according to the channel quality indication.
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Abstract
A method and system for achieving frequency domain scheduling in a time division duplex system is disclosed, the method comprising: a first device transmits a non pre-coded reference symbol to a second device; from the reference symbol, the second device obtains a channel impulse response matrix experienced by the reference symbol transmitted from the first device, and according to the channel impulse response matrix, obtains linear spatial domain pre-coding matrix of candidate physical resource blocks used in transmitting data to the first device; from the channel impulse response matrix and the linear spatial domain pre-coding matrix, the second device obtains the channel quality indication of the candidate physical resource blocks; and performs the frequency domain scheduling according to the channel quality indication. The use of the method not only solves the problem in the prior art that the frequency domain scheduling is unable to be performed when a channel sounding method is employed, but also the contradiction in the use of the frequency domain scheduling and the linear spatial domain pre-coding. A communication system is also disclosed.
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Citations
19 Claims
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1. A method for achieving frequency domain scheduling in a time division duplex system, wherein the method comprising the steps of:
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a first device transmits a non pre-coded reference symbol to a second device; from the reference symbol, the second device obtains a channel impulse response matrix experienced by the reference transmitted from the first device, and from the channel impulse response matrix, obtains linear spatial domain pre-coding matrix used in the candidate physical resource blocks to transmit data to the first device; from the channel impulse response matrix and the linear spatial domain pre-coding matrix, the second device obtains the channel quality indication of the candidate physical resource blocks; the frequency domain scheduling is performed according to the channel quality indication. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A communication system, wherein the system comprising:
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a first device for transmitting a non pre-coded reference symbol; a second device for obtaining a channel impulse response matrix experienced by the reference symbol transmitted from the first device from the reference symbol, and for obtaining the linear spatial domain pre-coding matrix of the candidate physical resource block used in transmitting data to the first device from the channel impulse response matrix, and for obtaining the channel quality indication of the corresponding physical resource block from the channel impulse response matrix and the linear spatial domain pre-coding matrix, and for performing the frequency domain scheduling according to the channel quality indication. - View Dependent Claims (17, 18)
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19. A communication system, wherein the system comprising:
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a first device for transmitting a non pre-coded reference symbol and performing frequency domain scheduling according to the channel quality indication fed back by a second device; a second device for obtaining a channel impulse response matrix experienced by the reference symbol transmitted from the first device from the reference symbol, and for obtaining the linear spatial domain pre-coding matrix of the candidate physical resource block used in transmitting data to the first device from the impulse response matrix, and for obtaining the channel quality indication of the corresponding candidate physical resource block from the channel impulse response matrix and the linear spatial domain pre-coding matrix, and for transmitting the channel quality indication to the first device.
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Specification