BASE STATION AND METHOD FOR IMPROVING COVERAGE IN A WIRELESS COMMUNICATION SYSTEM USING ANTENNA BEAM-JITTER AND CQI CORRECTION
First Claim
1. A method for improving coverage in a fixed beam-forming wireless communications network, said method comprising the steps of:
- modifying a beam by introducing a beam-jitter in a beam-forming pattern;
receiving an estimated channel quality information, CQI, from a user terminal;
accounting for effects of the beam-jitter on the estimated CQI to obtain a jitter-adjusted CQI estimate; and
using the jitter-adjusted CQI estimate during user scheduling for a future transmission to the user terminal.
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Accused Products
Abstract
A base station and method are described herein that improves the coverage in a fixed-beam wireless communication system by using antenna beam-jitter and Channel Quality Information (CQI) correction. In one embodiment, the method includes the steps of: (a) modifying a beam by introducing a beam-jitter in a beam-forming pattern; (b) receiving an estimated channel quality information, CQI, from a user terminal; (c) accounting for effects of the beam-jitter on the estimated CQI to obtain a jitter-adjusted CQI estimate; (d) and using the jitter-adjusted CQI estimate during user scheduling for a future transmission to the user terminal.
43 Citations
25 Claims
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1. A method for improving coverage in a fixed beam-forming wireless communications network, said method comprising the steps of:
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modifying a beam by introducing a beam-jitter in a beam-forming pattern; receiving an estimated channel quality information, CQI, from a user terminal; accounting for effects of the beam-jitter on the estimated CQI to obtain a jitter-adjusted CQI estimate; and using the jitter-adjusted CQI estimate during user scheduling for a future transmission to the user terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A base station comprising:
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a user data queue; a beam-forming antenna network; a scheduler unit; a jitter control unit; said scheduler unit receives user information from the user data queue, estimated channel quality information, CQIs, from user terminals, and beam jitter information from the jitter control unit and then processes all of this information to account for effects of the beam-jitter on the estimated CQIs and obtain jitter-adjusted CQI estimates which are used to choose a user terminal to transmit user data and select which beam in the beam-forming antenna network to transmit the user data to the chosen user terminal; and said beam-forming antenna network receives beam selection information from the scheduler unit, receives the beam jitter information from the jitter control unit and then modifies the selected beam by introducing a beam-jitter in a beam-forming pattern. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A user terminal comprising:
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a processor; and a memory that stores processor-executable instructions where the processor interfaces with the memory and executes the processor-executable instructions to enable the following; receive a signal transmitted from a base station that modified a beam by introducing a beam-jitter in a beam-forming pattern prior to transmitting the signal; estimate a channel quality information, CQI, associated with the received signal; account for effects of the beam-jitter on the estimated CQI to obtain a jitter-adjusted estimated CQI, where the account operation includes estimating an amount a signal to interference plus noise ratio, SINR, changes in the estimated CQI that is due to the beam-jitter; and transmit the estimated CQI and the jitter-adjusted estimated CQI. - View Dependent Claims (24, 25)
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Specification