Abstract
The present invention provides a method for reconfiguring an aggregated cell which includes that: a network side device judges whether the aggregated cell of a user equipment (UE) needs to be changed in the cell set in which the carriers can be aggregated; when the judgment result is that the change is needed the network side device transmits a radio resource control (RRC) connection reconfiguration message to the UE and the RRC connection reconfiguration message carries the change information of the aggregated cell of the UE; the UE receives the RRC connection reconfiguration message and reconfigures the aggregated cell according to the RRC connection reconfiguration message. In the present invention for the LTE-A system when the aggregated cell of UE which supports the carrier aggregation changes within the same cell set in which the carriers can be aggregated the aggregated cell of the UE can be reconfigured; and the same access stratum (AS) key is used to perform the security processing procedure for the data which enables the uninterrupted transmission for the data.
Technologies
Mobility and handover
Product
Use Cases
Wireless communication
Services
Claim
1. A method for reconfiguring aggregated cell, comprising:
a network side device judges whether the aggregated cell of a user equipment (UE) needs to be changed in the cell set in which the carriers can be aggregated;
when the judgment result is that the change is needed, the network side device transmits a radio resource control (RRC) connection reconfiguration message to the UE, and the RRC connection reconfiguration message carries the change information of the aggregated cell of the UE;
the UE receives the RRC connection reconfiguration message, and reconfigures the aggregated cell according to the RRC connection reconfiguration message; wherein
the aggregated cell of the UE changes in the cell set in which the carriers can be aggregated, comprising one or several of the following contents:
the main serving cell of the UE changes in the cell set in which the carriers can be aggregated; the serving cell of the UE changes in the cell set in which the carriers can be aggregated; the anchor cell of the UE changes in the cell set in which the carriers can be aggregated; all or part of aggregated cells of the UE change in the cell set in which the carriers can be aggregated.
2. The method according to claim 1, wherein all or part of aggregated cells of the UE change in the cell set in which the carriers can be aggregated, comprising one or several of the following contents: adding one or more new cells to the aggregated cell of the UE; deleting one or more cells from the aggregated cell of the UE; changing configuration information of all or part of cells comprised in the aggregated cell of the UE.
3. The method according to claim 1, wherein, the network side device judges whether the aggregated cell of a UE needs to be changed in the cell set in which the carriers can be aggregated, comprising:
the network side device judges whether the aggregated cell of UE needs to be changed in the cell set in which the carriers can be aggregated according to measurement report of the UE; or,
the network side device judges whether the aggregated cell of a UE needs to be changed in the cell set in which the carriers can be aggregated according to the load of each cell in the cell set in which the carriers can be aggregated; or,
the network side device judges whether the aggregated cell of a UE needs to be changed in the cell set in which the carriers can be aggregated according to service requirements of UE.
4. The method according to claim 1, wherein the change information of the aggregated cell of the UE, comprising one or several of the following contents:
the corresponding frequency information or frequency information index of the changed aggregated cell; the corresponding carrier configuration information of the changed aggregated cell; the corresponding frequency configuration information of the changed aggregated cell; the corresponding system information of the changed aggregated cell; the corresponding carrier identifier of the changed aggregated cell; the corresponding cell identifier of the changed aggregated cell; identifier information of the changed serving cell and/or main serving cell.
5. The method according to claim 4, wherein the corresponding cell identifier of the changed aggregated cell, comprising one or several of the following contents:
the corresponding physical layer cell ID of the aggregated cell; the corresponding E-UTRAN cell global ID of the aggregated cell; the corresponding cell ID of the aggregated cell.
6. The method according to claim 1, wherein the change information of aggregated cell of the UE, further comprising:
the corresponding MAC layer reconfiguration information and/or physical layer reconfiguration information of the changed aggregated cell.
7. The method according to claim 6, wherein when the change information of the aggregated cell of the UE carries the corresponding MAC layer reconfiguration information and/or physical layer reconfiguration information of the changed aggregated cell,
after the network side device transmits RRC connection reconfiguration message to the UE, further comprising:
the UE reconfigures MAC layer entity and/or physical layer entity, according to MAC layer reconfiguration information and/or physical layer reconfiguration information in the RRC connection reconfiguration information.
8. The method according to claim 1, wherein the network side device transmits RRC connection reconfiguration message to the UE, further comprising:
the network side device transmits RRC connection reconfiguration message, which carries change information of aggregated cell of LIE instead of carrying mobility control information and security configuration information to the UE.
9. The method according to claim 8, wherein after the network the device transmits RRC connection reconfiguration message, which carries change information of aggregated cell of UE instead of carrying mobility control information and security configuration information to the UE, further comprising:
the UE uses AS key which is used before receiving the RRC connection configuration message for security handling, and transmits reconfiguration complete message to the network side device, to enable the uninterrupted transmission for the data.
10. The method according to claim 9, wherein the UE uses the AS key which is used before receiving the RRC connection configuration message for security handling, comprising one or several of the following contents:
the UE uses KUPenc key in AS key which is used before receiving the RRC connection configuration message for data encryption and decryption;
the UE uses KRRCint key in AS key which is used before receiving the RRC connection configuration message for integrity protection and verification of RRC signalling;
the UE uses KRRCenc key in AS key which is used before receiving the RRC connection configuration message for RRC signalling encryption and decryption.
11. The method according to claim 1, wherein after reconfigures the aggregated cell according to the RRC connection reconfiguration message, further comprising:
the UE judges whether to perform random access procedure; when the judgment result is positive, performing random access procedure; when the judgment result is negative, omitting random access procedure.
12. The method according to claim 11, wherein before the network side device transmits RRC connection reconfiguration message to the UE, further comprising:
the network side device judges whether the UE needs to perform random access procedure, and transmits RRC connection reconfiguration message which carries random access instruction information to the UE; the random access instruction information is used for indicating UE whether to perform random access procedure.
13. The method according to claim 12, wherein after the network side device judges whether the UE needs to perform random access procedure, further comprising:
when the judgment result is positive, the network side device assigns preamble which is used for performing random access by the UE, and transmits the identifier information of preamble to the UE via RRC connection reconfiguration messages.
14. The method according to claim 12 or 13, wherein the UE judges whether to perform random access procedure, further comprising:
the UE judges whether to start random access procedure, according to the RRC connection reconfiguration message carrying random access instruction information or not.
15. The method according to claim 1, wherein reconfigures the aggregated cell according to the RRC connection reconfiguration message, comprising one or several of the following contents:
the UE configures the corresponding MAC layer entity and/or physical layer entity for the cell which is added to the aggregated cell;
the UE deletes or reconfigures the corresponding MAC layer entity and/or physical layer entity of the cell which is deleted from original aggregated cell;
the UE reconfigures the corresponding MAC layer entity and/or physical layer entity for the cell which is still used in original aggregated cell.
16. A network side device, comprising:
a judging module, configured to judge whether the aggregated cell of a UE needs to be changed in the cell set in which the carriers can be aggregated, the aggregated cell of the UE changes in the cell set in which the carriers can be aggregated, comprising one or several of the following contents: the main serving cell of the UE changes in the cell set in which the carriers can be aggregated; the serving cell of the UE changes in the cell set in which the carriers can be aggregated; the anchor cell of the UE changes in the cell set in which the carriers can be aggregated; all or part of aggregated cells of the UE change in the cell set in which the carriers can be aggregated;
a sending module, configured to transmit RRC connection reconfiguration message to the UE when the judgment result of the judging module is that the aggregated cell of the UE needs to be changed in the cell set in which the carriers can be aggregated, and the RRC connection reconfiguration message carries the change information of the aggregated cell of the UE; so that the UE reconfigures aggregated cell according to RRC connection reconfiguration message.
17. The network side device according to claim 16, wherein,
the judging module is specifically configured to,
judge whether the aggregated cell of the UE needs to be changed in the cell set in which the carriers can be aggregated according to the measurement report of UE;
judge whether the aggregated cell of the UE needs to be changed in the cell set in which the carriers can be aggregated according to the load of each cell in the cell set in which the carriers can be aggregated;
judge whether the aggregated cell of the UE needs to be changed in the cell set in which the carriers can be aggregated according to the service requirements of UE.
18. The network side device according to claim 16, wherein
the sending module is further configured to, transmit the RRC connection reconfiguration message, which carries the corresponding MAC layer reconfiguration information and/or physical layer reconfiguration information of the changed aggregated cell, to the UE, so that the UE reconfigures MAC layer entity and/or physical layer entity according to MAC layer reconfiguration information and/or physical layer reconfiguration information in the RRC connection reconfiguration message.
19. The network side device according to claim 16, wherein
the sending module is further configured to, transmit RRC connection reconfiguration message, which carries change information of aggregated cell of UE instead of carrying mobility control information and security configuration information, to the UE; so that the UE uses AS key which is used before receiving the RRC connection configuration message for security handling.
20. The network side device according to claim 16, wherein
the judging module is further configured to, judge whether the UE needs to perform random access procedure;
the sending module is further configured to, transmit RRC connection reconfiguration message, which carries random access instruction information, to the UE; the random access instruction information is used for indicating UE whether to perform random access procedure.
21. The network side device according to claim 20, wherein
the sending module is further configured to, when the judgment result of the judging module is positive, assign preamble which is used for performing random access procedure by the UE, and transmit the identifier information of preamble to the UE via the RRC connection reconfiguration messages.
22. A user equipment UE, comprising:
a receiving module, configured to receive RRC connection reconfiguration message from the network side device when network side device judging that the aggregated cell of the UE needs to be changed in the cell set in which the carriers can be aggregated; and the RRC connection reconfiguration message carries change information of the aggregated cell of the UE, wherein the aggregated cell of the UE changes in the cell set in which the carriers can be aggregated, comprising one or several of the following contents: the main serving cell of the UE changes in the cell set in which the carriers can be aggregated; the serving cell of the UE changes in the cell set in which the carriers can be aggregated; the anchor cell of the UE changes in the cell set in which the carriers can be aggregated; all or part of aggregated cells of the UE change in the cell set in which the carriers can be aggregated;
a processing module, configured to reconfigure aggregated cell according to RRC connection reconfiguration message which is received by the receiving module.
23. The UE according to claim 22, wherein, change information of the aggregated cell of said UE, comprising: the corresponding MAC layer reconfiguration information and/or physical layer reconfiguration information of the changed aggregated cell;
when the change information of the aggregated cell of the UE carries the corresponding MAC layer reconfiguration information and/or physical layer reconfiguration information of the aggregated changed cell,
the processing module is further configured to reconfigure MAC layer entity and/or physical layer entity, according to MAC layer reconfiguration information and/or physical layer reconfiguration information in the RRC connection reconfiguration message.
24. The UE according to claim 22, wherein when the network side device transmits RRC connection reconfiguration message, which carries change information of aggregated cell of UE instead of carrying mobility control information and of security configuration information, to the UE,
the processing module is further configured to, use AS key which is used before receiving the RRC connection configuration message for security handling, and transmit reconfiguration complete message to the network side device, to enable the uninterrupted transmission for the data;
and the processing module is specifically configured to,
use KUPenc key in AS key which is used before receiving the RRC connection configuration message for data encryption and decryption;
use KRRCint key in AS key which is used before receiving the RRC connection configuration message for integrity protection and verification of RRC signalling;
use KRRCenc key in AS key which is used before receiving the RRC connection configuration message for RRC signalling encryption and decryption.
25. The UE according to claim 22, wherein further comprising:
a judging module, configured to judge whether to start random access procedure; when the judgment result is positive, performing random access procedure; when the judgment result is negative, omitting random access procedure; and
judge whether to start random access procedure, according to the RRC connection reconfiguration message carrying random access instruction information or not.
26. The UE according to claim 22, wherein
the processing module is specifically configured to perform one or several of the following contents:
configuring the corresponding MAC layer entity and/or physical layer entity for the new added aggregated cell;
deleting or reconfiguring the corresponding MAC layer entity and/or physical layer entity of the cell which is deleted from original aggregated cell;
reconfiguring the corresponding MAC layer entity and/or physical layer entity for the cell which is still used in original aggregated cell.
27. A system for reconfiguring aggregated cell, comprising:
a network side device, configured to judge whether the aggregated cell of UE needs to be changed in the cell set in which the carriers can be aggregated; when the judgment result is need to change, transmitting RRC connection reconfiguration message to the UE, the RRC connection reconfiguration message carrying the change information of the aggregated cell of the UE, wherein the aggregated cell of the UE changes in the cell set in which the carriers can be aggregated, comprising one or several of the following contents: the main serving cell of the UE changes in the cell set in which the carriers can be aggregated; the serving cell of the UE changes in the cell set in which the carriers can be aggregated; the anchor cell of the UE changes in the cell set in which the carriers can be aggregated; all or part of aggregated cells of the UE change in the cell set in which the carriers can be aggregated;
a UE, configured to receive the RRC connection reconfiguration message, and reconfigure the aggregated cell according to the RRC connection reconfiguration message.
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Note:
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.