Mitigating ghost signalling effects in radio systems
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorPar Ankel
Life of this patent
Estimating the term…
Abstract
A method in a base station, the method comprising, for a transmission time interval on the control channel: if an absolute grant is scheduled, transmitting the absolute grant; if an absolute grant is not scheduled, investigating whether at least one UE in the cell is configured for receiving on the control channel, and if this is not the case, refraining from transmitting; and if an absolute grant is not scheduled and at least one UE in the cell is configured for receiving on the control channel, the method further comprising at least one of: (i) transmitting an absolute grant for a non-configured UE in the cell; and (ii) selecting an arbitrary configured UE in the cell and transmitting an absolute grant, which was previously transmitted at an earlier transmission time interval, to the selected UE.
Claims10
A method in a base station adapted for scheduling and receiving uplink transmissions from user entities (UEs) in a cell, the method comprising, for a giving transmission time interval (TTI) on the absolute grant channel:
- determining that no absolute grants are scheduled to be transmitted on the absolute grant channel during the given TTI;
- determining that at least one UE is configured for receiving on the absolute grant channel during the given TTI;
- and
- transmitting an absolute grant on the absolute grant channel in response to determining that:
- no absolute grants are scheduled to be transmitted on the absolute grant channel during the given TTI and at least one UE is configured for receiving on the absolute grant channel during the given TTI, wherein
- transmitting the absolute grant in response to the determination that:
- no absolute grants are scheduled to be transmitted on the absolute grant channel and at least one UE is configured for receiving on the absolute grant channel comprises transmitting, during the given TTI, the absolute grant on the absolute grant channel, wherein the absolute grant comprises a UE identifier that is not allocated to any UE or UE group in the cell, and
- the UE identifier is an Enhanced Dedicated Channel (E-DCH) Radio Network Temporary Identifier (E-RNTI) which is not configured in the cell.
A base station adapted for scheduling and receiving uplink transmissions from user entities (UEs) in a cell, the base station comprising:
- a memory;
- and
- a processing unit, comprising one or more processor, coupled to the memory, the processing unit being configured to, for a given transmission time interval (TTI) on a control channel:
- determine whether any absolute grants are scheduled to be transmitted on the control channel during the given TTI;
- and
- determine whether at least one UE is configured for receiving on the control channel during the given TTI, wherein
- the base station is configured such that, when the processing unit determines that no absolute grants are scheduled to be transmitted on the control channel during the given TTI and at least one UE in the cell is configured for receiving on the control channel during the given TTI, the base station, during the given TTI, transmits on the control channel an absolute grant,
- the transmitted absolute grant comprises a UE identifier that is not allocated to any UE or UE group in the cell, and
- the UE identifier is an Enhanced Dedicated Channel (E-DCH) Radio Network Temporary Identifier (E-RNTI) which is not configured in the cell.
Dependencies are inferred from the claim text.