Method, user equipment and network for performing a handover for user equipments in peer-to-peer communication mode, to a cell whose link performance is a predefined value higher than that of the active cell
First Claim
1. A method to be performed by a UE (user equipment), comprising:
- detecting downlink signals of an active cell in which said UE is camping and adjacent cells to said active cell;
judging whether there exists a suitable cell whose link performance is a predefined value higher than that of said active cell for both said UE and an another UE, according to said detecting result;
sending a detection report message to a network system to start a judging procedure of said network system if there exists said suitable cell, and said judging procedure deciding whether said UE and said another UE in P2P (peer to peer) communication can handover into said suitable cell to continue communication in P2P communication mode,wherein said detection report message comprises a first predefined threshold relating to a lower limit value at which a link satisfies a quality of service requirement and a second threshold relating to a condition in which an adjacent cell is used as a candidate cell, and wherein said UE and said another UE each transmits a candidate cell set comprising at least one candidate cell to said network system and said network system determines if a common candidate cell exists in said candidate cell sets, and upon detection of said common candidate cell, said network system instructs said UE and said another UE to perform a handover.
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Accused Products
Abstract
A method to be executed by a UE (user equipment) is proposed, for said UE in P2P communication mode to perform cell handover, comprising steps of: detecting downlink signals of the active cell in which said UE is camping and its adjacent cells (S205); judging whether there exists a suitable cell whose link performance is a predefined value higher than that of said active cell (S209), according to the detecting result; sending a detection report message to a network system (S210) to start a judging procedure of said network system if there exists said suitable cell, and said judging procedure deciding whether said UE and another UE in P2P communication can handover into said suitable cell to continue P2P communication.
40 Citations
20 Claims
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1. A method to be performed by a UE (user equipment), comprising:
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detecting downlink signals of an active cell in which said UE is camping and adjacent cells to said active cell; judging whether there exists a suitable cell whose link performance is a predefined value higher than that of said active cell for both said UE and an another UE, according to said detecting result; sending a detection report message to a network system to start a judging procedure of said network system if there exists said suitable cell, and said judging procedure deciding whether said UE and said another UE in P2P (peer to peer) communication can handover into said suitable cell to continue communication in P2P communication mode, wherein said detection report message comprises a first predefined threshold relating to a lower limit value at which a link satisfies a quality of service requirement and a second threshold relating to a condition in which an adjacent cell is used as a candidate cell, and wherein said UE and said another UE each transmits a candidate cell set comprising at least one candidate cell to said network system and said network system determines if a common candidate cell exists in said candidate cell sets, and upon detection of said common candidate cell, said network system instructs said UE and said another UE to perform a handover. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method to be performed by a network system, for a first and a second user equipment (UE) in P2P (peer to peer) communication mode to perform cell handover, comprising:
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receiving a detection report message from one of said first and second UEs, indicating that said one UE detects there exists a suitable cell in adjacent cells of an active cell, where a link performance of said suitable cell is a predefined value higher than that of said active cell; and
starting a judging procedure to decide whether said first and second UEs can handover into said suitable cell and continue traffic communication between said first and second UE using a P2P communication mode,wherein said detection report message comprises a first predefined threshold relating to a lower limit value at which a link satisfies a quality of service requirement and a second threshold relating to a condition in which an adjacent cell is used as a candidate cell, and wherein said UE and said another UE each transmits a candidate cell set comprising at least one candidate cell to said network system and said network system determines if a common candidate cell exists in said two candidate cell sets, and upon detection of said common candidate cell, said network system instructs said UE and said another UE to perform a handover. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A UE (user equipment), comprising:
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a detecting unit, for detecting downlink signals of said UE in an active cell and adjacent cells to the active cell;
a judging unit, for judging whether there exists a suitable cell whose link performance is a predefined value higher than that of said active cell, according to the detection result; anda sending unit, for sending a detection report message to a network system to start a judging procedure of said network system when there exists said suitable cell, wherein said judging procedure decides whether said UE and another UE in P2P (peer to peer) communication can perform a handover into said suitable cell while maintaining communication in P2P communication mode, wherein said detection report message comprises a first predefined threshold relating to a lower limit value at which a link satisfies a quality of service requirement and a second threshold relating to a condition in which an adjacent cell is used as a candidate cell, and wherein said UE and said another UE each transmits a candidate cell set comprising at least one candidate cell to said network system and said network system determines if a common candidate cell exists in said candidate cell sets, and upon detection of said common candidate cell, said network system instructs said UE and said another UE to perform a handover. - View Dependent Claims (15)
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16. A network system, comprising:
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a receiving unit, for receiving a detection report message from any user equipment (UE) of two UEs, said detection report message indicating that said UE detects there exists a suitable cell in said adjacent cells of an active cell, and a link performance of said suitable cell is a predefined value higher than that of said active cell; a judging unit, for starting a judging procedure to decide whether said two UEs can simultaneously handover into said suitable cell to continue P2P (peer to peer) communication, wherein said judging unit is for judging whether said link performance of another UE of said two UEs in said suitable cell can meet a requirement for communication quality, wherein said detection report message comprises a first predefined threshold relating to a lower limit value at which a link satisfies a quality of service requirement and a second threshold relating to a condition in which an adjacent cell is used as a candidate cell, and wherein said UE and said another UE each transmits a candidate cell set comprising at least one candidate cell to said network system and said network system determines if a common candidate cell exists in said two candidate cell sets, and upon detection of said common candidate cell said network system instructs said UE and said another UE to perform a handover. - View Dependent Claims (17, 18, 19, 20)
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Specification