Method and apparatus for grant loss detection and related processing in a wireless communication network
First Claim
1. A method at a wireless communication network base station of detecting grant losses for scheduling grants sent over a downlink control channel, said method comprising:
- scheduling transmissions to or from a mobile terminal by transmitting scheduling grants over the downlink control channel to the mobile terminal;
controlling link adaption of the downlink control channel, or HARQ redundancy version settings for the scheduled transmissions, or both, responsive to determining whether individual scheduling grants are lost; and
determining whether any one of said scheduling grants is lost, based on detecting an erasure event corresponding to the scheduled transmission.
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Abstract
The present invention provides a method and apparatus for improving wireless communication network performance and efficiency, based on detecting the occurrence of grant loss in relation to the transmission of scheduling grants to mobile terminals over a downlink control channel. Grant loss detection is based on detecting erasure events corresponding to the transmitted scheduling grants, and the incidence of grant loss with respect to a given mobile terminal can be tracked and used to compensate the control value(s) used for link adaptation of the downlink control channel, with respect to that terminal. Additionally, or alternatively, when a given grant is determined to be lost, a new grant is sent and the HARQ redundancy version is reset for the newly scheduled transmission.
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Citations
28 Claims
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1. A method at a wireless communication network base station of detecting grant losses for scheduling grants sent over a downlink control channel, said method comprising:
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scheduling transmissions to or from a mobile terminal by transmitting scheduling grants over the downlink control channel to the mobile terminal; controlling link adaption of the downlink control channel, or HARQ redundancy version settings for the scheduled transmissions, or both, responsive to determining whether individual scheduling grants are lost; and determining whether any one of said scheduling grants is lost, based on detecting an erasure event corresponding to the scheduled transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A base station for use in a wireless communication network, wherein said base station is configured to detect grant losses for scheduling grants sent over a downlink control channel, and wherein said base station comprises:
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a transceiver configured to transmit signals to mobile terminals, and to receive signals from mobile terminals; a scheduler configured to schedule transmissions to or from a mobile terminal by transmitting scheduling grants over the downlink control channel to the mobile terminal; one or more controllers configured to control link adaption of the downlink control channel, or HARQ redundancy version settings for the scheduled transmissions, or both, responsive to determining whether individual scheduling grants are lost; and a grant loss monitoring circuit configured to determine whether any given scheduling grant is lost, based on detecting an erasure event corresponding to the scheduled transmission. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification