Methods and arrangements for handling unreliable scheduling grants in a telecommunication network
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsMuhammad Ali Kazmi, Walter Gerhard Alois Muller, Rutger Gustav Gillbert Andersson, Dirk Gerstenberger, Karl Olof Joakim Bergstrom, Stefan Parkvall
Life of this patent
Estimating the term…
Abstract
The present invention relates to methods and arrangements for handling unreliable scheduling grants in a WCDMA-communication system. A user equipment detects that a received scheduling grant is unreliable and adjust its serving grant based on that information. The user equipment is also able to report continuously received unreliable grants as an event to the network, allowing the network to adapt its operation to reduce the unreliable grants.
Claims35
A method in a user equipment in a telecommunication network for handling unreliable relative scheduling grants applicable in a single link and a soft handover scenario, the method comprising the steps of:
- detecting at least one unreliable received relative scheduling grant, where the at least one unreliable relative scheduling grant comprising one of a HOLD command, an UP command and a DOWN command, wherein the detecting step further comprises determining if at least one received relative scheduling grant has a received power on a grant channel that is within a predetermined interval and if yes then the at least one received relative scheduling grant is the at least one unreliable received relative scheduling grant;
- interpreting any detected unreliable relative scheduling grant as HOLD;
- and
- estimating a new serving grant based at least on the detection and the interpretation, where the new serving grant represents uplink resources to be used by the user equipment;
- the estimating step comprises the step of maintaining the last serving grant for which the corresponding relative scheduling grants were all reliable;
- and
- where the relative scheduling grant provides an indication to the user equipment about a maximum amount of uplink resources that may be used by the user equipment.
An arrangement in a user equipment in a telecommunication network for handling unreliable relative scheduling grants applicable in a single link and a soft handover scenario, comprising:
- means for detecting at least one unreliable received scheduling grant, where the at least one unreliable relative scheduling grant comprising one of a HOLD command, an UP command and a DOWN command, wherein the determining means further determines if at least one received relative scheduling grant has a received power on a grant channel that is within a predetermined interval and if yes then the at least one received relative scheduling grant is the at least one unreliable received relative scheduling grant;
- means for interpreting any detected at least one unreliable received scheduling grant as HOLD;
- means for estimating a new serving grant based at least on the detection and the interpretation, where the new serving grant represents uplink resources to be used by the user equipment;
- the estimating means comprises means for maintaining the last serving grant for which the corresponding relative scheduling grants were all reliable;
- and
- where the relative scheduling grant provides an indication to the user equipment about a maximum amount of uplink resources that may be used by the user equipment.
An arrangement in a user equipment in a telecommunication network, comprising:
- means for detecting at least one unreliable received scheduling grant;
- means for interpreting the detected at least one unreliable received scheduling grant, means for estimating a new serving grant based at least on the detection and the interpretation;
- and
- means for receiving uplink interference thresholds for neighboring cells in a neighboring cells list, wherein said means for receiving, in response to at least one detected unreliable received scheduling grant, is operative to:
- measure the path loss to the neighboring cell and estimating UL interference, and,
- adjust transmit power using the Transport Format Combination (TFC) selection to keep the interference below the uplink interference threshold.
A method in a user equipment in a telecommunication network for handling unreliable relative scheduling grants applicable in a single link and a soft handover scenario, comprising the steps of:
- detecting at least one unreliable received relative scheduling grant;
- interpreting the at least one detected unreliable relative scheduling grant;
- estimating a new serving grant based at least on the detection and the interpretation;
- receiving uplink interference thresholds for neighboring cells in a neighboring cells list;
- and in response to at least one detected unreliable received scheduling grant:
- measuring the path loss to the neighboring cell and estimating uplink (UL) interference, and,
- adjusting transmit power using the Transport Format Combination (TFC) selection to keep the interference below the uplink interference threshold.
A method in a user equipment in a telecommunication network for handling unreliable relative scheduling grants applicable in a single link and a soft handover scenario, comprising the steps of:
- detecting at least one unreliable received relative scheduling grant;
- interpreting the at least one detected unreliable relative scheduling grant;
- estimating a new serving grant based at least on the detection and the interpretation;
- receiving Uplink Transmit Power Control (UL TPC) commands from a base station and interpreting the at least one unreliable received grant based on the received UL TPC commands;
- and
- interpreting an unreliable received scheduling grant as HOLD if the UL TPC command is DOWN, whereby the user equipment can follow the grant from the serving cell.
A method in a user equipment in a telecommunication network for handling unreliable relative scheduling grants applicable in a single link and a soft handover scenario, comprising the steps of:
- detecting at least one unreliable received relative scheduling grant;
- interpreting the at least one detected unreliable relative scheduling grant;
- estimating a new serving grant based at least on the detection and the interpretation;
- receiving Uplink Transmit Power Control (UL TPC) commands from a base station and interpreting the at least one unreliable received grant based on the received UL TPC commands;
- and
- interpreting an unreliable received scheduling grant as DOWN if the UL TPC command is UP.
A method in a user equipment in a telecommunication network for handling unreliable relative scheduling grants applicable in a single link and a soft handover scenario, comprising the steps of:
- detecting at least one unreliable received relative scheduling grant;
- interpreting the at least one detected unreliable relative scheduling grant;
- estimating a new serving grant based at least on the detection and the interpretation;
- receiving Uplink Transmit Power Control (UL TPC) commands from a base station and interpreting the at least one unreliable received grant based on the received UL TPC commands;
- and
- interpreting said at least one unreliable received scheduling grant according to:
- Rg=−1×TPCUL—TTI
- where Rg=interpreted unreliable grant, and TPCUL=1 for UP command and TPCUL=0 for DOWN command, where TPCUL—TTI is based on the combined decisions of all the TPCUL commands received during one Transmission Time Interval (TTI) where if majority TPCUL are UP, then TPCUL—TTI is UP and vice versa.
A user equipment in a telecommunication network for handling unreliable relative scheduling grants applicable in a single link and a soft handover scenario, comprising:
- a detection unit that detects at least one unreliable received scheduling grant, where the at least one unreliable relative scheduling grant comprising one of a HOLD command, an UP command and a DOWN command, wherein the detection unit further determines if at least one received relative scheduling grant has a received power on a grant channel that is within a predetermined interval and if yes then the at least one received relative scheduling grant is the at least one unreliable received relative scheduling grant;
- an interpretation unit that interprets any detected at least one unreliable received scheduling grant as HOLD;
- an estimation unit that estimates a new serving grant based at least on the detection and the interpretation, where the new serving grant represents uplink resources to be used by the user equipment;
- the estimation unit configured to maintain the last serving grant for which the corresponding relative scheduling grants were all reliable;
- and
- where the relative scheduling grant provides an indication to the user equipment about a maximum amount of uplink resources that may be used by the user equipment.
A method in a user equipment in a telecommunication network for handling unreliable relative scheduling grants applicable in a single link and a soft handover scenario, the method comprising the steps of:
- detecting at least one unreliable received relative scheduling grant, where the at least one unreliable relative scheduling grant comprising one of a HOLD command, an UP command and a DOWN command, wherein the detecting step further comprises determining if at least one received relative scheduling grant has a received power on a grant channel that is within a predetermined interval and if yes then the at least one received relative scheduling grant is the at least one unreliable received relative scheduling grant;
- interpreting any detected unreliable relative scheduling grant as HOLD;
- and
- estimating a new serving grant based at least on the detection and the interpretation, the estimating comprising maintaining the last serving grant when all the relative scheduling grants are unreliable, where the new serving grant represents uplink resources to be used by the user equipment, and where the relative scheduling grant provides an indication to the user equipment about a maximum amount of uplink resources that may be used by the user equipment.
A method in a user equipment in a telecommunication network for handling unreliable relative scheduling grants of relative scheduling grants comprising one of a HOLD command, an UP command and a DOWN command applicable in a single link and a soft handover scenario, the method comprising the steps of:
- detecting at least one unreliable received relative scheduling grant, where the at least one unreliable relative scheduling grant comprising one of an UP command and a DOWN command, wherein the detecting step further comprises determining if at least one received relative scheduling grant has a received power on a grant channel that is within a predetermined interval and if yes then the at least one received relative scheduling grant is the at least one unreliable received relative scheduling grant;
- interpreting any detected unreliable relative scheduling grant as HOLD;
- and
- estimating a new serving grant based at least on the detection and the interpretation, where the new serving grant represents uplink resources to be used by the user equipment;
- the estimating step comprises the step of maintaining the last serving grant for which the corresponding relative scheduling grants were all reliable;
- and
- where the relative scheduling grant provides an indication to the user equipment about a maximum amount of uplink resources that may be used by the user equipment.
A method in a user equipment in a telecommunication network for handling unreliable relative scheduling grants applicable in one of a single link and a soft handover scenario, the method comprising steps of:
- detecting, by the user equipment, at least one unreliable received relative scheduling grant, where the at least one unreliable relative scheduling grant comprising one of a HOLD command, an UP command and a DOWN command, wherein the detecting step further comprises determining if at least one received relative scheduling grant has a received power on a grant channel that is within a predetermined interval and if yes then the at least one received relative scheduling grant is the at least one unreliable received relative scheduling grant;
- interpreting, by the user equipment, any detected unreliable relative scheduling grant as HOLD;
- and
- estimating, by the user equipment, a new serving grant based at least on the detection and the interpretation, the estimating step comprising adapting the serving grant by following reliable relative scheduling grants and by treating unreliable relative scheduling grants as HOLD.
A user equipment in a telecommunication network for handling unreliable relative scheduling grants applicable in one of a single link and a soft handover scenario, comprising:
- a detection unit that detects at least one unreliable received relative scheduling grant, where the at least one unreliable relative scheduling grant comprising one of a HOLD command, an UP command and a DOWN command, wherein the detection unit further determines if at least one received relative scheduling grant has a received power on a grant channel that is within a predetermined interval and if yes then the at least one received relative scheduling grant is the at least one unreliable received relative scheduling grant;
- an interpretation unit that interprets any detected at least one unreliable received scheduling grant as HOLD;
- and
- an estimation unit that estimates a new serving grant based at least on the detection and the interpretation, the estimating unit is configured to adapt the serving grant by following reliable relative scheduling grants and by treating unreliable relative scheduling grants as HOLD.
Dependencies are inferred from the claim text.