Method and Arrangement Relating to Communications Network
AssigneeTelefonaktiebolaget L M Ericssson (Publ)
InventorsMuhammad Kazmi, Jingyi Liao
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Abstract
The invention relates to a method in a radio base station and user equipment, and comprises varying the transmitted timings of the HARQ feedback signalling such that only users with orthogonal pre-coding vectors (W) are scheduled simultaneously, to reduce multi-user interference and to ensure that said signalling is received by a transmitter before the start of the next retransmission.
Claims48
A method in a radio base station, the method comprising:
- when HARQ is used, awaiting reception if a HARQ ACK/NACK feedback signalling by a transmitter before sending a retransmission.
A method in a radio base station in a cellular radio communication network, where HARQ is used for the error control, the method comprising:
- varying the transmitted timings of the HARQ feedback signaling and/or relevant information such that users with orthogonal pre-coding vectors (W) are scheduled simultaneously to reduce multi-user interference and said signalling is received by a transmitter before the start of the next retransmission,
- allocating or signaling a user equipment a time within which a user equipment is to transmit the HARQ feedback signaling and/or said relevant information, and
- detecting said HARQ feedback signaling and/or said relevant information sent by the user equipment within the allocated time duration.
A method in a user equipment for use in a cellular radio communication network where HARQ is used for the error control, the method comprising:
- receiving a timing at which the uplink HARQ feedback signalling and/or relevant information is to be sent to the said base station,
- transmitting the uplink HARQ feedback or other relevant signaling according to the allocating, and
- detecting the reception of downlink HARQ feedback signaling and/or said relevant information that could be sent by the base station at any arbitrary time between the transmission and the retransmission or between successive retransmissions.
A radio base station for use in a cellular radio communication network, where HARQ is used for the error control, said base station comprising:
- means for varying a transmitted timing of HARQ feedback signaling and/or a necessary information such that users with orthogonal pre-coding vectors (W) are scheduled simultaneously to reduce multi-user interference and said signalling is received by the transmitter before the start of the next retransmission,
- means for allocating or signaling the user equipment a time within which a user equipment is to transmit the HARQ feedback signaling and/or said relevant information, and
- means for detecting said HARQ feedback signaling and/or said relevant information sent by the user equipment within the allocated time duration.
A user equipment in a cellular radio communication network where HARQ is used for error control, the user equipment comprising:
- a receiver for receiving from a timing at which a uplink HARQ feedback signalling and/or a relevant information is to be sent,
- a transmitter for transmitting said uplink HARQ feedback and/or said relevant signaling according to a allocating timing,
- means for detecting reception of downlink HARQ feedback signaling and/or said relevant information, which can be sent by a base station at any arbitrary time between the transmission and the retransmission or between successive retransmissions.
A method of receiving data from a transmitting device in a receiving device, the method comprising:
- attempting to receive the transmitted data;
- and
- sending an ACK/NACK message at a dynamically selectable time.
A method of transmitting data from a transmitting device to a receiving device, the method comprising:
- attempting to transmit the data;
- dynamically selecting a time at which the receiving device should send an ACK/NACK message;
- signalling the selected time to the receiving device;
- and
- attempting to receive the ACK/NACK message at the selected time.
A receiving device, adapted to:
- attempt to receive transmitted data from a transmitting device;
- and
- send an ACK/NACK message at a dynamically selectable time.
A transmitting device, for transmitting data to a receiving device, the transmitting device being adapted to:
- attempt to transmit the data;
- dynamically select a time at which the receiving device should send an ACK/NACK message;
- signal the selected time to the receiving device;
- and
- attempt to receive the ACK/NACK message at the selected time.
Dependencies are inferred from the claim text.