Method and Arrangement in a Communication Network
AssigneeTelefonaktiebolaget L M Ericssson (Publ)
InventorsMuhammad Kazmi, Robert Baldemair, Rong Hu
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Abstract
The present invention relates to methods, a user equipment and a radio base station in a communication network, in which a downlink out-of-coverage is detected based on measurements done on a common channel or on the combination of common and dedicated channels. The out-of-coverage is then reported to the network, either using resources proactively assigned to the user equipment, or by transmitting a predetermined pattern of signature sequences assigned to the user equipment.
Claims44
A method in a user equipment of measuring the quality of a received common channel, wherein the method comprises the steps of:
- detecting an out of coverage condition, when one or more measurement quantities, which is based on the common channel or on common reference signals or combination of common and dedicated reference symbols, deteriorates in relation to a predefined threshold;
- detecting an in coverage condition, when one or more measurement quantities, which is based on the common channel or on common reference signals combination of common and dedicated reference symbols, improves in relation to a predefined threshold;
- receiving from a radio base station a pattern of signature sequences to be used for reporting out of coverage;
- and,
- reporting the detected out of coverage to the radio base station either on a random access channel or on a shared channel without requesting any uplink scheduling grant or resource assignment.
A method in a radio base station of transmitting one or more common channels, said radio base station comprises means for receiving and detecting a random access channel, means for receiving measurement reports and means for assigning radio resources or scheduling grant to a user equipment, wherein the method comprises the steps of:
- signalling a pattern of the signature sequences, to be used for reporting out of coverage, to the user equipment (UE);
- and
- receiving the pattern of signature sequences on said random access channel (RACH);
- and
- interpreting the received pattern of signature sequences to determine that said user equipment is out of coverage.
A user equipment for measuring the quality of a received common channel, comprising:
- means for detecting an out of coverage condition, when one or more measurement quantities, which is based on the common channel or on common reference signals or combination of common and dedicated reference symbols, deteriorates in relation to a predefined threshold;
- means for detecting an in coverage condition, when one or more measurement quantities, which is based on the common channel or on common reference signals combination of common and dedicated reference symbols, improves in relation to a predefined threshold;
- means for receiving from a radio base station a pattern of signature sequences to be used for reporting out of coverage;
- and,
- means for reporting the detected out of coverage to the radio base station either on a random access channel or on a shared channel without requesting any uplink scheduling grant or resource assignment.
A radio base station for transmitting one or more common channels, comprising means for receiving and detecting a random access channel, means for receiving measurement reports and means for assigning radio resources or scheduling grant to a user equipment, wherein the radio base station further comprises:
- means for signalling a pattern of signature sequences, to be used for reporting out of coverage, to the user equipment (UE);
- means for receiving the pattern of signature sequences on said random access channel (RACH);
- and
- means for interpreting the received pattern of signature sequences to determine that said user equipment is out of coverage.
A method, for use in a radio base station, wherein the method comprises the steps of:
- signalling a pattern of signature sequences, to be used for reporting out of coverage, to a user equipment;
- receiving the pattern of signature sequences from the user equipment on a random access channel (RACH);
- and
- determining in response to the received pattern of signature sequences that the user equipment is out of coverage.
A radio base station, being adapted to:
- signal a pattern of signature sequences, to be used for reporting out of coverage, to a user equipment:
- receive the pattern of signature sequences from the user equipment on a random access channel (RACH);
- and
- determine in response to the received pattern of signature sequences that the user equipment is out of coverage.
A method, for use in a radio base station, comprising the steps of:
- receiving downlink measurement reports from a user equipment;
- determining when one or more downlink reported measurements from the user equipment are at their minimum reportable levels;
- and
- proactively assigning uplink radio resources or scheduling grants to the user equipment for the user equipment to use in the event that it requires to report an out of coverage condition.
A radio base station, being adapted to:
- receive downlink measurement reports from a user equipment;
- determine when one or more downlink reported measurements from the user equipment are at their minimum reportable levels;
- and
- proactively assign uplink radio resources or scheduling grants to the user equipment for the user equipment to use in the event that it requires to report an out of coverage condition.
A method, for use in a radio base station, wherein the method comprises the steps of:
- signalling a plurality of patterns of signature sequences to a user equipment, each pattern of signature sequences being associated with a respective critical condition relating to operation of the user equipment;
- receiving one of the patterns of signature sequences from the user equipment on a random access channel (RACH);
- and
- determining in response to the received pattern of signature sequences that the user equipment is in the critical condition associated with the received pattern.
A radio base station, being adapted to:
- signal a plurality of patterns of signature sequences to a user equipment, each pattern of signature sequences being associated with a respective critical condition relating to operation of the user equipment;
- receive one of the patterns of signature sequences from the user equipment on a random access channel (RACH);
- and
- determine in response to the received pattern of signature sequences that the user equipment is in the critical condition associated with the received pattern.
A method, for use in a user equipment, wherein the method comprises the steps of:
- receiving from a radio base station a plurality of patterns of signature sequences, each pattern of signature sequences being associated with a respective critical condition relating to operation of the user equipment;
- determining that one of said critical conditions applies;
- and
- transmitting one of the patterns of signature sequences, associated with the critical condition, on a random access channel (RACH).
A user equipment, adapted to:
- receive from a radio base station a plurality of patterns of signature sequences, each pattern of signature sequences being associated with a respective critical condition relating to operation of the user equipment;
- determine that one of said critical conditions applies;
- and
- transmit one of the patterns of signature sequences, associated with the critical condition, on a random access channel (RACH).
Dependencies are inferred from the claim text.