Establishing simultaneous radio connection between a user equipment and two eNodeBs
First Claim
1. A radio communication system comprising:
- a first eNB (eNodeB) that operates a first cell;
a second eNB that operates a second cell, anda radio terminal capable of aggregating the first cell as a primary cell with the second cell as a secondary cell, whereinthe first eNB outputs, to the second eNB, a first request for the second eNB, wherein the first request is configured to request the second eNB to prepare radio resources for aggregating the first cell with the second cell by the radio terminal, while an established first radio connection between the first eNB and the radio terminal is maintained on the first cell,the second eNB outputs, to the first eNB, radio resource configuration information of the second cell, andthe first eNB transmits, to the radio terminal, an RRC Connection Reconfiguration message including at least the radio resource configuration information of the second cell, while the established first radio connection between the first eNB and the radio terminal is maintained, whereinthe first request includes at least E-RAB ID (E-UTRAN Radio Access Bearer Identity) which indicates an identity of an E-UTRAN radio access bearer, at least between the radio terminal and an S-GW via the second eNB, to be added, andthe radio resource configuration information of the second cell includes at leasta drb-identity (Data Radio Bearer Identity) which indicates an identity of a data radio bearer, between at least the radio terminal and the second eNB, mapped on the E-UTRAN radio access bearer indicated by the E-RAB ID, andan eps-BearerIdentity (Evolved Packet System Bearer Identity) which indicates an identity of an EPS-bearer mapped on the E-UTRAN radio access bearer indicated by the E-RAB ID.
1 Assignment
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Accused Products
Abstract
A first radio station (1) requests or instructs a second radio station (2) to prepare for communication with a radio terminal (3) on a second cell (20) while a first radio connection on a first cell (10) with the radio terminal (3) is established. Further, the first radio station (1) instructs the radio terminal (3) or the second radio station (2) to establish a second radio connection on the second cell (20) with the radio terminal (3) while maintaining the radio connection on the first cell (10) with the radio terminal (3). It is thus for example possible to enable a single radio terminal to establish radio connections with cells of a plurality of radio stations, in order to achieve carrier aggregation of cells operated by different radio stations.
20 Citations
35 Claims
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1. A radio communication system comprising:
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a first eNB (eNodeB) that operates a first cell; a second eNB that operates a second cell, and a radio terminal capable of aggregating the first cell as a primary cell with the second cell as a secondary cell, wherein the first eNB outputs, to the second eNB, a first request for the second eNB, wherein the first request is configured to request the second eNB to prepare radio resources for aggregating the first cell with the second cell by the radio terminal, while an established first radio connection between the first eNB and the radio terminal is maintained on the first cell, the second eNB outputs, to the first eNB, radio resource configuration information of the second cell, and the first eNB transmits, to the radio terminal, an RRC Connection Reconfiguration message including at least the radio resource configuration information of the second cell, while the established first radio connection between the first eNB and the radio terminal is maintained, wherein the first request includes at least E-RAB ID (E-UTRAN Radio Access Bearer Identity) which indicates an identity of an E-UTRAN radio access bearer, at least between the radio terminal and an S-GW via the second eNB, to be added, and the radio resource configuration information of the second cell includes at least a drb-identity (Data Radio Bearer Identity) which indicates an identity of a data radio bearer, between at least the radio terminal and the second eNB, mapped on the E-UTRAN radio access bearer indicated by the E-RAB ID, and an eps-BearerIdentity (Evolved Packet System Bearer Identity) which indicates an identity of an EPS-bearer mapped on the E-UTRAN radio access bearer indicated by the E-RAB ID. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A first eNB (eNodeB) that operates a first cell, the first eNB comprising:
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an interface; and at least one hardware processor configured; to output a first request for a second eNB that operates a second cell via the interface, wherein the first request is configured to request the second eNB to prepare radio resources for aggregating the first cell with the second cell by a radio terminal, while an established first radio connection between the first eNB and the radio terminal is maintained on the first cell; to receive, from the second eNB via the interface, radio resource configuration information of the second cell; and to transmit, to the radio terminal, an RRC Connection Reconfiguration message including at least the radio resource configuration information of the second cell while the established first radio connection between the radio terminal and the first eNB is maintained, wherein the first request includes at least E-RAB ID (E-UTRAN Radio Access Bearer Identity) which indicates an identity of an E-UTRAN radio access bearer, at least between the radio terminal and an S-GW via the second eNB, to be added, and the radio resource configuration information of the second cell includes at least a drb-identity (Data Radio Bearer Identity) which indicates an identity of a data radio bearer, between at least the radio terminal and the second eNB, mapped on the E-UTRAN radio access bearer indicated by the E-RAB ID, and an eps-BearerIdentity (Evolved Packet System Bearer Identity) which indicates an identity of an EPS-bearer mapped on the E-UTRAN radio access bearer indicated by the E-RAB ID. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A second eNB (eNodeB) that operates a second cell, the second eNB comprising:
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an interface; and at least one hardware processor configured; to receive, from a first eNB that operates a first cell, a first request for the second eNB via the interface, wherein the first request is configured to request the second eNB to prepare radio resources for aggregating the first cell with the second cell by a radio terminal, while an established first radio connection between the first eNB and the radio terminal is maintained on the first cell; and to output, to the first eNB via the interface, radio resource configuration information of the second cell, wherein the first eNB is configured to transmit, to the radio terminal, an RRC Connection Reconfiguration message including at least the radio resource configuration information of the second cell while the established first radio connection between the radio terminal and the first eNB is maintained, wherein the first request includes at least E-RAB ID (E-UTRAN Radio Access Bearer Identity) which indicates an identity of an E-UTRAN radio access bearer, at least between the radio terminal and an S-GW via the second eNB, to be added, and the radio resource configuration information of the second cell includes at least a drb-identity (Data Radio Bearer Identity) which indicates an identity of a data radio bearer, between at least the radio terminal and the second eNB, mapped on the E-UTRAN radio access bearer indicated by the E-RAB ID, and an eps-BearerIdentity (Evolved Packet System Bearer Identity) which indicates an identity of an EPS-bearer mapped on the E-UTRAN radio access bearer indicated by the E-RAB ID. - View Dependent Claims (19, 20, 21, 22)
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23. A radio terminal comprising:
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a receiver; and at least one hardware processor configured; to establish a first radio connection between a first eNB (eNodeB) and the radio terminal on a first cell operated by the first eNB; to control the receiver to receive an RRC Connection Reconfiguration message from the first eNB, wherein the RRC Connection Reconfiguration message includes radio resource configuration information of a second cell operated by a second eNB; to add the second cell as a secondary cell based on the radio resource configuration information of the second cell while the established first radio connection is maintained on the first cell; and to perform aggregating the first cell, operated by the first eNB, as a primary cell with the second cell, operated by the second eNB, as the secondary cell, wherein the radio resource configuration information of the second cell includes at least a drb-identity (Data Radio Bearer Identity) which indicates an identity of a data radio bearer between at least the radio terminal and the second eNB, and an eps-BearerIdentity (Evolved Packet System Bearer Identity) which indicates an identity of an EPS-bearer mapped on the data radio bearer; and
whereinthe radio resource configuration information of the second cell is sent from the second eNB to the first eNB via an interface in response to a first request from the first eNB via the interface, wherein the first request, for preparing radio resources by the second eNB for the radio terminal on the second cell, includes at least E-RAB ID (E-UTRAN Radio Access Bearer Identity) which indicates an identity of an E-UTRAN radio access bearer, at least between the radio terminal and an S-GW via the second eNB, to be added. - View Dependent Claims (24)
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25. A communication control method in a first eNB (eNodeB) that operates a first cell, the method comprising:
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outputting, via an interface, a first request for a second eNB that operates a second cell, wherein the first request is configured to request the second eNB to prepare radio resources for aggregating the first cell with the second cell by a radio terminal, while an established first radio connection between the first eNB and the radio terminal is maintained on the first cell; receiving, from the second eNB via the interface, radio resource configuration information of the second cell; and transmitting, to the radio terminal, an RRC Connection Reconfiguration message including at least the radio resource configuration information of the second cell while the established first radio connection between the radio terminal and the first eNB is maintained, wherein the first request includes at least E-RAB ID (E-UTRAN Radio Access Bearer Identity) which indicates an identity of an E-UTRAN radio access bearer, at least between the radio terminal and an S-GW via the second eNB, to be added, and the radio resource configuration information of the second cell includes at least a drb-identity (Data Radio Bearer Identity) which indicates an identity of a data radio bearer, between at least the radio terminal and the second eNB, mapped on the E-UTRAN radio access bearer indicated by the E-RAB ID, and an eps-BearerIdentity (Evolved Packet System Bearer Identity) which indicates an identity of an EPS-bearer mapped on the E-UTRAN radio access bearer indicated by the E-RAB ID. - View Dependent Claims (26, 27, 28)
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29. A communication control method in a second eNB (eNodeB) that operates a second cell, the method comprising:
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receiving, from a first eNB that operates a first cell, a first request for the second eNB via an interface, wherein the first request is configured to request the second eNB to prepare radio resources for aggregating the first cell with the second cell by a radio terminal, while an established first radio connection between the first eNB and the radio terminal is maintained on the first cell; and outputting, to the first eNB via the interface, radio resource configuration information of the second cell, wherein the first eNB is configured to transmit, to the radio terminal, an RRC Connection Reconfiguration message including at least the radio resource configuration information of the second cell while the established first radio connection between the radio terminal and the first eNB is maintained, wherein the first request includes at least E-RAB ID (E-UTRAN Radio Access Bearer Identity) which indicates an identity of an E-UTRAN radio access bearer, at least between the radio terminal and an S-GW via the second eNB, to be added, and the radio resource configuration information of the second cell includes at least a drb-identity (Data Radio Bearer Identity) which indicates an identity of a data radio bearer, between at least the radio terminal and the second eNB, mapped on the E-UTRAN radio access bearer indicated by the E-RAB ID, and an eps-BearerIdentity (Evolved Packet System Bearer Identity) which indicates an identity of an EPS-bearer mapped on the E-UTRAN radio access bearer indicated by the E-RAB ID. - View Dependent Claims (30, 31)
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32. A communication control method in a radio terminal, the method comprising:
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establishing a first radio connection between a first eNB (eNodeB) and the radio terminal on a first cell operated by the first eNB; controlling a receiver included in the radio terminal to receive an RRC Connection Reconfiguration message from the first eNB, wherein the RRC Connection Reconfiguration message includes radio resource configuration information of a second cell operated by a second eNB; adding the second cell as a secondary cell based on the radio resource configuration information of the second cell while the established first radio connection is maintained on the first cell; and performing aggregating the first cell, operated by the first eNB, as a primary cell with the second cell, operated by the second eNB, as the secondary cell, wherein the radio resource configuration information of the second cell includes at least a drb-identity (Data Radio Bearer Identity) which indicates an identity of a data radio bearer between at least the radio terminal and the second eNB, and an eps-BearerIdentity (Evolved Packet System Bearer Identity) which indicates an identity of an EPS-bearer mapped on the data radio bearer, and wherein the radio resource configuration information of the second cell is sent from the second eNB to the first eNB via an interface in response to a first request from the first eNB via the interface, wherein the first request, for preparing radio resources by the second eNB for the radio terminal on the second cell, includes at least E-RAB ID (E-UTRAN Radio Access Bearer Identity) which indicates an identity of an E-UTRAN radio access bearer, at least between the radio terminal and an S-GW via the second eNB, to be added.
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33. A non-transitory computer readable medium that stores a program for causing a computer to perform a communication control method in a first eNB (eNodeB) operating a first cell, the communication control method comprising:
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outputting, via an interface, a first request for a second eNB that operates a second cell, wherein the first request is configured to request the second eNB to prepare radio resources for aggregating the first cell with the second cell by a radio terminal, while an established first radio connection between the first eNB and the radio terminal is maintained on the first cell; receiving, from the second eNB via the interface, radio resource configuration information of the second cell; and transmitting, to the radio terminal, an RRC Connection Reconfiguration message including at least the radio resource configuration information of the second cell while the established first radio connection between the radio terminal and the first eNB is maintained, wherein the first request includes at least E-RAB ID (E-UTRAN Radio Access Bearer Identity) which indicates an identity of an E-UTRAN radio access bearer, at least between the radio terminal and an S-GW via the second eNB, to be added, and the radio resource configuration information of the second cell includes at least a drb-identity (Data Radio Bearer Identity) which indicates an identity of a data radio bearer, between at least the radio terminal and the second eNB, mapped on the E-UTRAN radio access bearer indicated by the E-RAB ID, and an eps-BearerIdentity (Evolved Packet System Bearer Identity) which indicates an identity of an EPS-bearer mapped on the E-UTRAN radio access bearer indicated by the E-RAB ID.
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34. A non-transitory computer readable medium that stores a program for causing a computer to perform a communication control method in a second eNB (eNodeB) operating a second cell, the communication control method comprising:
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receiving, from a first eNB that operates a first cell, a first request for the second eNB via an interface, wherein the first request is configured to request the second eNB to prepare radio resources for aggregating the first cell with the second cell by a radio terminal, while an established first radio connection between the first eNB and the radio terminal is maintained on the first cell; and outputting, to the first eNB via the interface, radio resource configuration information of the second cell, wherein the first eNB is configured to transmit, to the radio terminal, an RRC Connection Reconfiguration message including at least the radio resource configuration information of the second cell while the established first radio connection between the radio terminal and the first eNB is maintained, wherein the first request includes at least E-RAB ID (E-UTRAN Radio Access Bearer Identity) which indicates an identity of an E-UTRAN radio access bearer, at least between the radio terminal and an S-GW via the second eNB, to be added, and the radio resource configuration information of the second cell includes at least a drb-identity (Data Radio Bearer Identity) which indicates an identity of a data radio bearer, between at least the radio terminal and the second eNB, mapped on the E-UTRAN radio access bearer indicated by the E-RAB ID, and an eps-BearerIdentity (Evolved Packet System Bearer Identity) which indicates an identity of an EPS-bearer mapped on the E-UTRAN radio access bearer indicated by the E-RAB ID.
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35. A non-transitory computer readable medium that stores a program for causing a computer to perform a communication control method in a radio terminal, the communication control method comprising:
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establishing a first radio connection between a first eNB (eNodeB) and the radio terminal on a first cell operated by the first eNB; controlling a receiver included in the radio terminal to receive an RRC Connection Reconfiguration message from the first eNB, wherein the RRC Connection Reconfiguration message includes radio resource configuration information of a second cell operated by a second eNB; adding the second cell as a secondary cell based on the radio resource configuration information of the second cell while the established first radio connection is maintained on the first cell; and performing aggregating the first cell, operated by the first eNB, as a primary cell with the second cell, operated by the second eNB, as the secondary cell, wherein the radio resource configuration information of the second cell includes at least a drb-identity (Data Radio Bearer Identity) which indicates an identity of a data radio bearer between at least the radio terminal and the second eNB, and an eps-BearerIdentity (Evolved Packet System Bearer Identity) which indicates an identity of an EPS-bearer mapped on the data radio bearer, and wherein the radio resource configuration information of the second cell is sent from the second eNB to the first eNB via an interface in response to a first request from the first eNB via the interface, wherein the first request, for preparing radio resources by the second eNB for the radio terminal on the second cell, includes at least E-RAB ID (E-UTRAN Radio Access Bearer Identity) which indicates an identity of an E-UTRAN radio access bearer, at least between the radio terminal and an S-GW via the second eNB, to be added.
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Specification