Abstract
The present invention relates to a method and arrangement for controlling re-transmission in a user equipment supporting uplink spatial multiplexing. The method comprises the steps of
detecting an uplink grant on a physical downlink control channel, the uplink grant being valid for at least one transport block; detecting that at least one transport block is disabled, such that no grant is associated with the at least one transport block; and interpreting the at least one disabled transport block as an acknowledgement, ACK, of previous transmission corresponding to said disabled transport block irrespective of which indication is received on the reception status feedback channel for said previous transmission.
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Specification Information
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Technologies
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Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Product
Use Cases
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Claim
d is:
1. A method for controlling re-transmission in a user equipment supporting uplink spatial multiplexing, the method comprising the steps of
detecting an uplink grant on a physical downlink control channel, the uplink grant being valid for at least one transport block; and
interpreting a disabled transport block as an acknowledgement (ACK) of a previous transmission corresponding to the disabled transport block irrespective of which indication is received on a reception status feedback channel for the previous transmission, where the interpreting step comprises that a second protocol layer assumes, upon reception from a first protocol layer of one or more grants valid for fewer transport blocks than what could be spatially multiplexed, that the ACK has been received for the previous transmission for a transport block for which no grant has been forwarded to the second protocol layer from the first protocol layer.
2. The method according to claim 1, wherein the interpreting step comprises that the first protocol layer delivers an indication of the ACK to the second protocol layer.
3. The method according to claim 2, wherein the indication comprises the step of setting an ACK/Negative Acknowledgement (NACK) flag to ACK.
4. The method according to claim 2, wherein the first protocol layer is a physical layer and the second protocol layer is a higher protocol layer.
5. The method according to claim 1, wherein the ACK is used as input in a Hybrid Automatic Repeat Request (HARQ) process corresponding to the disabled transport block in an uplink data transfer procedure.
6. The method according to claim 1, wherein the reception status feedback channel is a Physical Hybrid Automatic Repeat Request (HARQ) Indicator Channel (PHICH).
7. A user equipment comprising: circuitry operable to:
detect an uplink grant on a physical downlink control channel, the uplink grant being valid for at least one transport block; and
interpret a disabled transport block as an acknowledgement (ACK) of a previous transmission corresponding to the disabled transport block irrespective of which indication is received on a reception status feedback channel for the previous transmission, where the interpreting step comprises that a second protocol layer assumes, upon reception from a first protocol layer of one or more grants valid for fewer transport blocks than what could be spatially multiplexed, that the ACK has been received for the previous transmission for a transport block for which no grant has been forwarded to the second protocol layer from the first protocol layer.
8. The method according to claim 7, wherein the interpreting step comprises that the first protocol layer delivers an indication of ACK to the second protocol layer.
9. The method according to claim 8, wherein the indication comprises the step of setting an ACK/Negative Acknowledgement (NACK) flag to ACK.
10. The method according to claim 8, wherein the first protocol layer is a physical layer and the second protocol layer is a higher protocol layer.
11. The method according to claim 7, wherein the ACK is used as input in a Hybrid Automatic Repeat Request (HARQ) process corresponding to the disabled transport block in an uplink data transfer procedure.
12. The method according to claim 7, wherein the reception status feedback channel is a Physical Hybrid Automatic Repeat Request (HARQ) Indicator Channel (PHICH).
13. A method for controlling re-transmission in a base station, the method comprising the steps of
transmitting, to a user equipment, an uplink grant on a physical downlink control channel, the uplink grant being valid for at least one transport block; and
indicating, to the user equipment, that a transport block corresponding to a previous transmission to the user equipment is disabled;
where the disabled transport block is to be interpreted as an acknowledgement (ACK) of the previous transmission corresponding to the disabled transport block irrespective of which indication is transmitted on a reception status feedback channel for the previous transmission, where the interpreting comprises that a second protocol layer assumes, upon reception from a first protocol layer of one or more grants valid for fewer transport blocks than what could be spatially multiplexed, that the ACK has been received for the previous transmission for a transport block for which no grant has been forwarded to the second protocol layer from the first protocol layer.
14. The method according to claim 13, wherein indicating that the transport block is disabled comprises:
transmitting, to the user equipment, one or more grants valid for fewer transport blocks than what could be spatially multiplexed.
15. The method according to claim 13, wherein the ACK is used as input in a Hybrid Automatic Repeat Request (HARQ) process corresponding to the disabled transport block in an uplink data transfer procedure.
16. The method according to claim 13, wherein the reception status feedback channel is a Physical Hybrid Automatic Repeat Request (HARQ) Indicator Channel (PHICH).
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.