WO2015089791A1

WO2015089791A1 - Method, device and system for realizing carrier aggregation

Info

Publication number: WO2015089791A1
Application number: PCT/CN2013/089967
Authority: WO
Inventors: 黄敏
Original assignee: 华为技术有限公司
Priority date: 2013-12-19
Filing date: 2013-12-19
Publication date: 2015-06-25
Also published as: CN104054388B; CN104054388A

Abstract

A method, device and system for realizing carrier aggregation. The method comprises the following steps: according to a neighbour cell measurement report reported by a user equipment (UE), acquiring, by a primary eNB (PeNB), a secondary cell (SCell), the SCell being a cell added by the PeNB for a UE to conduct carrier aggregation (CA) between the PeNB and a secondary eNB (SeNB); sending to the SeNB, by the PeNB, a secondary cell adding request message, so that the SeNB allocates a corresponding air interface resource according to an evolved packet system bearer (EPS-Bearer) which is carried in the secondary cell adding request message and migrated to the SCell; receiving, by the PeNB, a secondary cell adding response message sent by the SeNB; sending to the UE, by the PeNB, a radio resource control (RRC) reconfiguration message, so that the UE establishes a data radio bearer (DRB) of the UE and the SeNB according to the air interface resource; and sending to a uniform control node (SRC), by the PeNB, a secondary cell activation message, so that the UE conducts CA between eNBs using the primary cell (PCell) and the SCell.

Description

Method, device and system for implementing carrier aggregation

Technical field

The embodiments of the present invention relate to the field of communications, and in particular, to a method, device, and system for implementing carrier aggregation. Background technique

Carrier Aggregation (CA) refers to two evolved NodeBs (eNBs) that are used to make two small cells (the primary cell and the secondary cell) of the CA. As CA technology can bring higher throughput, improve user experience, and improve network resource utilization, inter-base station CA technology has become a hot topic in current research.

For the inter-base station CA technology, the Internet Protocol (IP) layer is usually used for offloading, and the complete L1 and L2 protocol stacks are available in the primary eNB (PeNB) and the secondary eNB (SeNB). It means that different data radio bearers (DRBs) need to be established in the primary station and the secondary station respectively, and the degree of coupling between the stations is low, and it is not sensitive to delay.

In the research of inter-base station CA of the 3rd Generation Partnership Project (3GPP) Rel-12, there are two main methods for shunting in the IP layer: One is to place the shunt point on the service gateway. (Serving GateWay, SGW), the other is to place the split point in the PeNB.

At present, for the inter-eNB CA scheme of the IP layer offload, the split point is placed on the PeNB or the SGW, and the dynamic splitting cannot be performed. For the inter-base station CA, how to add or delete the slave cell under the premise of flexible dynamic offloading A problem that has received much attention. Summary of the invention

The embodiments of the present invention provide a method, a device, and a system for implementing carrier aggregation, which can implement addition or deletion of a cell under the premise of dynamic offloading.

In a first aspect, an embodiment of the present invention provides a method for implementing carrier aggregation, including:

According to the neighboring cell measurement report reported by the user equipment UE, the primary station PeNB acquires the secondary cell SCell, and the SCell is the PeNB for the UE, and performs the inter-base station CA of the PeNB and the secondary station SeNB. And the added cell, where the SeNB manages the SCell, the UE is attached to the primary cell PCell, the PCell is managed by the PeNB, and the PeNB and the SeNB are respectively controlled with the RAN side of the radio access network. Node SRC is connected;

The PeNB sends a secondary cell addition request message to the SeNB, so that the SeNB allocates a corresponding air interface resource according to the evolved packet system bearer EPS-Bearer that is carried in the cell increase request message and migrates to the SCell, where The EPS-Bearer that is migrated to the SCell belongs to an EPS-Bearer established for the UE in the PCell;

Receiving, by the PeNB, a slave cell increase response message, where the slave cell add response message carries the air interface resource;

The PeNB sends a radio resource control protocol RRC reconfiguration message to the UE, where the RRC reconfiguration message carries the air interface resource, so that the UE establishes data of the UE and the SeNB according to the air interface resource. Radio bearer DRB, the DRB corresponding to the EPS-Bearer migrating to the SCell;

The PeNB sends a secondary cell activation message to the SRC, so that the UE performs the inter-base station CA by using the PCell and the SCell.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the EPS-Bearer that is migrated to the SCell includes:

The PeNB determines an EPS-Bearer that is migrated to the SCell.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the PeNB sends a secondary cell increase request message to the SeNB, so that the SeNB And allocating the corresponding air interface resource by the EPS-Bearer, which is carried in the egress packet to be migrated to the SCell, and the corresponding air interface resource, including:

Transmitting, by the SeNB, a cell addition request message to the SeNB, by using the SRC, to enable the SeNB to allocate corresponding air interface resources according to the EPS-Bearer that is carried in the cell addition request message and migrated to the SCell. The EPS-Bearer that is migrated to the SCell is determined by the PeNB or determined by the SRC;

Receiving, by the PeNB, the slave cell increase response message sent by the SeNB, where

And receiving, by the SeNB, a slave cell increase response message sent by the SeNB, where the slave cell add response message carries the air interface resource.

In combination with the first aspect or the first possible or second possible implementation of the first aspect, at the first In a third possible implementation manner, the the cell addition request message further includes at least one of the following parameters: a security algorithm, a cell radio network temporary identifier C-RNTI, a system message, a primary cell load information, and a user. Device capability information, bearer related information Bearer Related Info, security key Security Key, service provision description identifier SPID.

With reference to the first aspect or the first possible or the second possible or the third possible implementation manner of the first aspect, in the fourth possible implementation manner of the first aspect, the air interface resource includes: L1, L2 Configuration parameters of the protocol stack.

In a second aspect, the embodiment of the present invention further provides a method for implementing carrier aggregation, including: receiving, by a station SeNB, a slave cell addition request message, where the slave cell increase request message carries an evolved packet system that migrates to a slave cell SCell to carry an EPS -Bearer, the EPS-Bearer migrating to the SCell belongs to an EPS-Bearer established for the user equipment UE in the primary cell PCell, and the SCell is the primary station PeNB performing the CA between the PeNB and the SeNB base station for the UE An increased cell, the SCell is obtained by the PeNB according to a neighboring cell measurement report reported by the UE, where the SeNB manages the SCell, the PeNB manages the PCell, and the UE is attached to the PCell. The PeNB and the SeNB are respectively connected to the radio access network RAN side unified control node SRC; the SeNB allocates corresponding air interface resources to the EPS-Bearer that is migrated to the SCell; the SeNB establishes a data channel with the SRC The data channel corresponds to the EPS-Bearer that is migrated to the SCell;

The SeNB sends a secondary cell add response message to the PeNB, where the secondary cell add response message carries the air interface resource, so that the PeNB sends a radio resource control protocol RRC reconfiguration message to the UE, where the RRC The reconfiguration message carries the air interface resource, so that the UE establishes a data radio bearer DRB of the UE and the SeNB according to the air interface resource resource, and the DRB and the EPS-Bearer that migrates to the SCell Correspondingly, after the configuration is successful, the PeNB sends a secondary cell activation message to the SRC, so that the UE performs the inter-base station CA by using the PCell and the SCell.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the receiving, by the SeNB, the receiving a request message from the cell includes:

Receiving, by the SeNB, a secondary cell addition request message sent by the PeNB;

Or, the SeNB receives a secondary cell addition request message sent by the PeNB via the SRC. In combination with the second aspect or the first possible implementation of the second aspect, the second aspect of the second aspect In a possible implementation manner, the SeNB sends a secondary cell add response message to the PeNB, where: the SeNB sends a secondary cell add response message to the PeNB via the SRC.

With reference to the second aspect, or the first possible or the second possible implementation manner of the second aspect, in the third possible implementation manner of the second aspect, the the secondary cell addition request message further includes at least one of the following parameters A: selecting a security algorithm, a cell radio network temporary identifier C-RNTI, a system message, a primary cell load information, a user equipment capability information, a bearer association information, a security key, and a service providing description identifier SPID.

With reference to the second aspect or the first possible or the second possible or the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, The method includes: an identity code of the data channel, and an internet protocol IP address of the SRC.

With reference to the second aspect or the first possible or the second possible or the third possible or the fourth possible implementation manner of the second aspect, in the fifth possible implementation manner of the second aspect, the air interface resource Including: Ll, L2 protocol stack configuration parameters;

The data channel is a general packet radio service GPRS tunneling protocol user plane GTPU tunnel; the identity code of the data channel is a tunnel endpoint identifier TEID.

In a third aspect, an embodiment of the present invention further provides a method for implementing carrier aggregation, including: a unified control node SRC establishing a data channel between the SRC and a secondary station SeNB, and the data channel and an evolution to the secondary cell SCell A packet-type network carrying EPS-Bearer - correspondingly, the EPS-Bearer migrating to the SCell belongs to an EPS-Bearer established for the user equipment UE in the primary cell PCell, wherein the SCell is managed by the SeNB, and the PCell is managed by the primary The PeNB manages, the PeNB and the SeNB are respectively connected to the SRC, and the UE is attached to the PCell; the SRC receives a secondary cell activation message sent by the PeNB, to implement the SRC to use the PCell. And the SCell performs inter-base station CA for the UE.

With reference to the third aspect, in a first possible implementation manner of the third aspect, before the SRC establishes a data channel between the SRC and the slave station SeNB, the method further includes:

The SRC determines an EPS-Bearer that is migrated to the SCell.

With the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, before the SRC establishes a data channel between the SRC and the slave SeNB, Includes:

The SRC forwards the cell addition request message sent by the PeNB to the SeNB; The SRC forwards the slave cell addition response message sent by the SeNB to the PeNB. With reference to the third aspect or the first possible or the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the SRC establishes a data channel between the SRC and the SeNB , including:

The SRC establishes a data channel between the SRC and the SeNB under the trigger of the PeNB; or, the SRC establishes a data channel between the SRC and the SeNB under the trigger of the SeNB.

In conjunction with the third aspect or the first possible or the second possible or the third possible implementation of the third aspect, in a fourth possible implementation of the third aspect,

The data channel is a general packet radio service GPRS tunneling protocol user plane GTPU tunnel, and the identity code of the data channel is a tunnel end identifier TEID.

With reference to the third aspect or the first possible or the second possible or the third possible or the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the SRC receiving After the slave cell activation message sent by the PeNB, the method further includes: sending, by the SRC, the downlink data stream to the SeNB by using the data channel.

In a fourth aspect, the embodiment of the present invention further provides a method for implementing carrier aggregation, including: according to a neighboring cell measurement report reported by a user equipment UE, the primary station PeNB determines to delete the cell SCell, and the SCell is used by the UE. The PeNB and the secondary station SeNB perform a cell of the inter-base station CA, where the SeNB manages the SCell, and the UE is attached to the primary cell PCell,

The PCell is managed by the PeNB, and the PeNB and the SeNB are respectively connected to the unified control node SRC;

Sending, by the PeNB, a first slave cell deletion request message to the SRC, to enable the SRC to stop sending a downlink data stream by using the SeNB;

After receiving the first slave cell deletion response message sent by the SRC, the PeNB sends a radio resource control protocol RRC reconfiguration message to the UE, so that the UE stops using the SCell to send an uplink data stream.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, after the PeNB sends the radio resource control protocol RRC reconfiguration message to the UE, the method further includes:

Sending, by the PeNB, a second slave cell deletion request message to the SeNB, so that the SeNB The air interface resource allocated by the EPS-Bearer according to the evolved packet system migrated to the SCell is released. With the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the sending, by the PeNB, the second secondary cell deletion request message to the SeNB includes:

The PeNB sends a second slave cell deletion request message to the SeNB via the SRC. In a fifth aspect, the embodiment of the present invention further provides a method for implementing carrier aggregation, including: receiving, by a radio access network RAN, a unified control node SRC, a first slave cell deletion request message sent by a primary station PeNB, where the PeNB and the slave station The SeNB is respectively connected to the SRC;

And the SRC stops sending the downlink data stream to the SeNB according to the received first slave cell deletion request message.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, after the SRC stops sending the downlink data stream to the SeNB according to the received first cell deletion request message, the SRC further includes:

The SRC sends a first secondary cell deletion response message to the PeNB.

With the fifth aspect or the first possible implementation manner of the fifth aspect, in a second possible implementation manner of the fifth aspect, the SRC stops the information according to the received first cell deletion request message After the SeNB sends the downlink data stream, the method further includes:

And sending, by the SRC, the second slave cell deletion request message to the SeNB, so that the SeNB releases the air interface resource allocated by the EPS-Bearer according to the evolved packet system migrated to the SCell.

In a sixth aspect, the embodiment of the present invention further provides a primary station PeNB, including:

And an acquiring unit, configured to acquire, according to the neighboring cell measurement report reported by the user equipment UE, the cell SCell, where the SCell is a cell that is added by the PeNB for the UE to perform inter-base station CA of the PeNB and the slave station SeNB, where The SeNB manages the SCell, the UE is attached to the primary cell PCell, the PCell is managed by the PeNB, and the PeNB and the SeNB are respectively connected to the radio access network RAN side unified control node SRC;

a first sending unit, configured to send a slave cell add request message to the SeNB, to enable the

The SeNB allocates corresponding air interface resources according to the evolved packet system bearer EPS-Bearer that is migrated to the SCell, and the EPS-Bearer that belongs to the SCell belongs to the UE in the EPS-Bearer established by PCell;

a receiving unit, configured to receive a slave cell increase response message sent by the SeNB, where the slave cell add response message carries the air interface resource; a second sending unit, configured to send a radio resource control protocol RRC reconfiguration message to the UE, where the RRC reconfiguration message carries the air interface resource, so that the UE establishes the UE and the device according to the air interface resource. a data radio bearer DRB of the SeNB, where the DRB corresponds to the EPS-Bearer that is migrated to the SCell;

And a third sending unit, configured to send a slave cell activation message to the SRC, so that the UE performs the inter-base station CA by using the PCell and the SCell.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the PeNB further includes: a determining unit, configured to determine an EPS-Bearer that is migrated to the SCell.

In conjunction with the first aspect or the first possible implementation of the first aspect, in a second possible implementation of the first aspect,

The first sending unit is configured to send, by using the SRC, a cell addition request message to the SeNB, so that the SeNB migrates to the EPS-bearer according to the slave cell increase request message Allocating a corresponding air interface resource, where the EPS-Bearer migrating to the SCell is determined by the PeNB or determined by the SRC;

The receiving unit is configured to receive, by using the SRC, a secondary cell addition response message sent by the SeNB, where the secondary cell addition response message carries the air interface resource.

In a seventh aspect, the embodiment of the present invention further provides a slave station SeNB, including:

a receiving unit, configured to receive a slave cell addition request message, where the slave cell increase request message carries an EPS-bearer that is migrated to the evolved packet system of the slave cell SCell, where the EPS-Bearer migrated to the SCell belongs to the user equipment An EPS-Bearer established by the UE in the primary cell PCell, where the SCell is a cell that the primary station PeNB adds to the UE between the PeNB and the SeNB base station CA, and the SCell is measured by the PeNB according to the neighboring area reported by the UE. a cell obtained by reporting, wherein the SeNB manages the SCell, the PeNB manages the PCell, the UE is attached to the PCell, and the PeNB and the SeNB respectively control a node with a radio access network RAN side SRC connected;

An allocation unit, configured to allocate a corresponding air interface resource to the EPS-Bearer that is migrated to the SCell; a channel establishing unit, configured to establish a data channel with the SRC according to the air interface resource, where the data channel and the migration to the SCell EPS-Bearer - corresponding;

a sending unit, configured to send a slave cell add response message to the PeNB, where the slave cell add response message carries the air interface resource, so that the PeNB sends a radio resource control to the UE a protocol RRC reconfiguration message, where the RRC reconfiguration message carries the air interface resource, so that the UE establishes a data radio bearer DRB of the UE and the SeNB according to the air interface resource resource, the DRB and the The EPS-Bearer corresponding to the SCell is corresponding, and after the configuration is successful, the PeNB sends a secondary cell activation message to the SRC, so that the UE performs the inter-base station CA by using the PCell and the SCell.

With reference to the seventh aspect, in a first possible implementation manner of the seventh aspect, the receiving unit is configured to receive a secondary cell addition request message sent by the PeNB, or receive a slave sent by the PeNB by using the SRC. The cell adds a request message.

With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, in a second possible implementation manner of the seventh aspect, the sending unit is specifically configured to send a secondary cell to the PeNB by using the SRC. Increase the response message.

The eighth aspect, the embodiment of the present invention further provides a unified control node SRC, including: a channel establishing unit, configured to establish a data channel between the SRC and the slave station SeNB, where the data channel is migrated to the slave cell SCell. The evolved packet network carries an EPS-Bearer-correspondingly, the EPS-Bearer that is migrated to the SCell belongs to an EPS-Bearer established for the user equipment UE in the primary cell PCell, wherein the SCell is managed by the SeNB, and the PCell is The primary station PeNB manages, the PeNB and the SeNB are respectively connected to the SRC, and the UE is attached to the PCell; the first receiving unit is configured to receive a secondary cell activation message sent by the PeNB, by using the PCell And the SCell performs inter-base station CA for the UE.

With reference to the eighth aspect, in a first possible implementation manner of the eighth aspect, the SRC further includes: a determining unit, configured to determine an EPS-Bearer that is migrated to the SCell.

With reference to the eighth aspect, or the first possible implementation manner of the eighth aspect, in the second possible implementation manner of the eighth aspect, the SRC further includes:

a first sending unit, configured to forward a cell addition request message sent by the PeNB to the SeNB, and forward a cell increase response message sent by the SeNB to the PeNB.

With reference to the eighth aspect or the first possible or the second possible implementation manner of the eighth aspect, in a third possible implementation manner of the eighth aspect, the channel establishing unit is specifically used in the PeNB Establishing a data channel between the SRC and the SeNB under triggering; or establishing a data channel between the SRC and the SeNB under the trigger of the SeNB.

Combining the first or second possible or third possible reality of the eighth aspect or the eighth aspect In a fourth possible implementation manner of the eighth aspect, the SRC, further includes: a second receiving unit, configured to receive a downlink data stream sent by the serving gateway SGW/the public data network gateway PGW;

a second sending unit, configured to send the downlink data stream to the SeNB by using the data channel.

The ninth aspect, the embodiment of the present invention further provides another primary station PeNB, including:

And an acquiring unit, configured to determine, according to the neighboring cell measurement report reported by the user equipment, the cell to be deleted from the cell SCell, where the SCell is a cell in which the UE uses the PeNB and the slave station SeNB to perform inter-base station CA, where the SeNB manages The SCell, the UE is attached to the primary cell PCell, the PCell is managed by the PeNB, and the PeNB and the SeNB are respectively connected to the unified control node SRC;

a first sending unit, configured to send a first slave cell deletion request message to the SRC, to stop the SRC from sending a downlink data stream to the SeNB;

a receiving unit, configured to receive a first slave cell deletion response message sent by the SRC, where the second sending unit is configured to send, by the receiving unit, a first slave cell deletion response message sent by the SRC, to send the wireless message to the UE The resource control protocol RRC reconfigures the message to cause the UE to stop using the SCell to send an upstream data stream.

With reference to the ninth aspect, in a first possible implementation manner of the ninth aspect, the PeNB further includes:

And a third sending unit, configured to send a second secondary cell deletion request message to the SeNB, to enable the SeNB to release the air interface resource allocated by the EPS-Bearer according to the evolved packet system migrated to the SCell.

With reference to the first possible implementation manner of the ninth aspect, in a second possible implementation manner of the ninth aspect, the third sending unit is configured to send the second secondary cell to the SeNB by using the SRC. Delete the request message.

A tenth aspect, the embodiment of the present invention further provides another SRC, including: a receiving unit, configured to receive a first slave cell deletion request message sent by the primary station PeNB, where the PeNB and the slave station SeNB respectively Said SRC connected;

And a data flow control unit, configured to stop sending the downlink data flow to the SeNB according to the received first secondary cell deletion request message. With reference to the tenth aspect, in a first possible implementation manner of the tenth aspect, the SRC further includes:

And a first sending unit, configured to send, by the data flow control unit, the first secondary cell deletion response message to the PeNB, after stopping sending the downlink data flow to the SeNB according to the received first secondary cell deletion request message.

With reference to the tenth aspect or the first possible implementation manner of the tenth aspect, in the second possible implementation manner of the tenth aspect, the SRC further includes:

a second sending unit, configured to send, by the data flow control unit, a second secondary cell deletion request message to the SeNB after stopping sending the downlink data flow to the SeNB according to the received first secondary cell deletion request message, And causing the SeNB to release the air interface resource allocated by the EPS-Bearer according to the evolved packet system migrated to the SCell.

The eleventh aspect, the embodiment of the present invention further provides a carrier aggregation implementation system, including: the primary station PeNB according to any one of the sixth aspects, the secondary station SeNB according to any one of the seventh aspects The radio access network side unified control node SRC according to any one of the eighth aspect, wherein the PeNB and the SeNB are respectively connected to the SRC;

Or,

The primary station PeNB according to any one of the ninth aspects, the radio access network side unified control node SRC and the secondary station SeNB according to any one of the tenth aspects, wherein the PeNB and the SeNB respectively Connected to the SRC, the SeNB is configured to receive a second slave cell deletion request message sent by the PeNB or the SeNB, and release an air interface resource allocated by the EPS-Bearer according to the evolved packet system migrated to the SCell.

As can be seen from the above technical solutions, the embodiments of the present invention have the following advantages:

In the embodiment of the present invention, the PeNB acquires an SCell that is added by the UE to perform the inter-base station CA of the PeNB and the SeNB according to the neighboring cell measurement report reported by the UE, and then the PeNB sends a secondary cell addition request message to the SeNB, and the SeNB migrates to the SCell. The EPS-Bearer configures the air interface resource, and then the SeNB establishes a data channel with the SRC according to the allocated air interface resource. The PeNB obtains the air interface resource by receiving the received cell add response message, and the PeNB sends an RRC reconfiguration message to the UE, where the RRC re The configuration message carries the air interface resource, and the UE can establish the data radio bearer of the UE and the SeNB according to the air interface resource. Finally, the PeNB sends the slave cell activation message to the SRC, and the PeNB and the SeNB are respectively connected with the SRC, so the UE can use the PCell and the SCell performs inter-base station CA, thereby The process of adding the entire SCell is completed, so that the UE can implement carrier aggregation. In the embodiment of the present invention, a data channel is established between the SeNB and the SRC, so that the data stream transmitted by the PeNB can be shared by the SeNB, and the data stream is set in the SRC, and the data stream that does not need to be transmitted by the PeNB does not pass through the PeNB. Therefore, the problem of the loop on the PeNB is avoided, and the split point of the data stream does not need to be established in the SGW. Therefore, even if the signaling of the SCell is increased frequently, the core network is not transmitted, and the signaling load of the core network is avoided.

In the embodiment of the present invention, the PeNB acquires the SCell deleted by the UE from using the inter-base station CA of the PeNB and the SeNB according to the neighboring cell measurement report reported by the UE, and then the PeNB sends the first slave cell deletion request message to the SRC, and the SRC according to the The first slave cell deletion request message stops transmitting the downlink data stream to the SeNB, and the PeNB sends the RRC reconfiguration message to the UE. Then, the UE stops using the SCell to send the uplink data stream according to the RRC reconfiguration message, thereby completing the deletion process of the entire SCell. After the SCell is added in the embodiment of the present invention, the process of deleting the SCell is implemented correspondingly, and the scheme integrity of the SCell is implemented in the implementation method of the carrier aggregation. The split point of the data stream does not need to be established in the SGW. Therefore, even if the signaling of the SCell is deleted frequently, it does not pass through the core network, and the signaling load of the core network is not increased. DRAWINGS

FIG. 1 is a schematic structural diagram of an SRC-based Inter-eNB CA according to an embodiment of the present disclosure;

FIG. 1 is a schematic diagram of a composition structure of an Inter-eNB CA based on an SRC according to an embodiment of the present invention;

FIG. 1 is a structural diagram of another SRC-based Inter-eNB CA according to an embodiment of the present invention;

2 is a schematic block diagram of a method for implementing carrier aggregation according to an embodiment of the present invention; FIG. 3 is a schematic block diagram showing another method for implementing carrier aggregation according to an embodiment of the present invention;

4 is a schematic block diagram showing another method for implementing carrier aggregation according to an embodiment of the present invention;

FIG. 5 is a schematic block diagram of another method for implementing carrier aggregation according to an embodiment of the present disclosure; FIG. 6 is a schematic block diagram showing another method for implementing carrier aggregation according to an embodiment of the present disclosure;

FIG. 7 is a schematic block diagram showing another method for implementing carrier aggregation according to an embodiment of the present disclosure;

FIG. 8 is a schematic block diagram showing another method for implementing carrier aggregation according to an embodiment of the present disclosure;

FIG. 8 is a schematic block diagram of another method for implementing carrier aggregation according to an embodiment of the present disclosure;

FIG. 9 is a schematic block diagram showing another method for implementing carrier aggregation according to an embodiment of the present disclosure;

FIG. 10 is a schematic block diagram showing another method for implementing carrier aggregation according to an embodiment of the present disclosure;

FIG. 11 is a schematic block diagram showing another method for implementing carrier aggregation according to an embodiment of the present disclosure;

FIG. 12 is a schematic block diagram showing another method for implementing carrier aggregation according to an embodiment of the present disclosure;

FIG. 13 is a schematic block diagram showing another method for implementing carrier aggregation according to an embodiment of the present disclosure;

FIG. 14 is a schematic structural diagram of a PeNB according to an embodiment of the present disclosure;

FIG. 14 is a schematic structural diagram of another PeNB according to an embodiment of the present invention; FIG. 15 is a schematic structural diagram of a SeNB according to an embodiment of the present disclosure;

16-a is a schematic structural diagram of a structure of an SRC according to an embodiment of the present invention;

16-b is a schematic structural diagram of another SRC according to an embodiment of the present invention; FIG. 16-c is a schematic structural diagram of another SRC according to an embodiment of the present invention; FIG. 16-d is provided according to an embodiment of the present invention; FIG. 17-a is a schematic structural diagram of a PeNB according to an embodiment of the present invention;

Figure 17-b is a schematic structural diagram of another PeNB according to an embodiment of the present invention; Figure 18-a is a schematic structural diagram of another SRC according to an embodiment of the present invention; FIG. 18-c is a schematic structural diagram of another SRC according to an embodiment of the present invention; FIG. 19 is a schematic structural diagram of a system for implementing carrier aggregation according to an embodiment of the present disclosure;

20-a is a schematic structural diagram of another SRC according to an embodiment of the present invention;

20-b is a schematic structural diagram of another SRC according to an embodiment of the present invention;

FIG. 21 is a schematic structural diagram of another PeNB according to an embodiment of the present disclosure;

FIG. 22 is a schematic structural diagram of another SeNB according to an embodiment of the present disclosure;

FIG. 23 is a schematic structural diagram of another SRC according to an embodiment of the present invention. detailed description

The embodiment of the invention provides a method, a device and a system for implementing carrier aggregation, which can implement the addition or deletion of a secondary cell (SCell) in the case of dynamic offloading.

In order to make the object, the features and the advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly described in conjunction with the drawings in the embodiments of the present invention. The examples are only a part of the embodiments of the invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of the present invention.

The terms "first", "second" and the like in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a particular order or order. It is to be understood that the terms so used are interchangeable as appropriate, and are merely illustrative of the manner in which the objects of the same. Furthermore, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion so that a process, method, system, product, or device comprising a series of units is not necessarily limited to those elements, but may include not clear Other units listed or inherent to these processes, methods, products or equipment.

In the research of 3GPP inter-base station CA, there are two main methods for offloading in the IP layer: one is to place the split point on the SGW, and the other is to put the split point on the PeNB.

If the traffic point of the data stream is placed in the PeNB, all the data streams on the SeNB must first reach the PeNB, and then processed by the PeNB and then sent to each SeNB. In this way, for the backhaul of the PeNB, in addition to the traffic of the local station, it also needs to bear the round-trip data flow of the SeNB, which adds a great pressure to the Backhaul of the PeNB, so the split point is placed in the PeNB solution. Causes the loop to be caused by the problem. If the traffic offloading point is placed in the SGW, the one of the two bearers that are originally established on the PeNB can be switched to the SCell after the SCell is added. The specific implementation manner is as follows: The tunnel endpoint ID (TEID) of the S1UP is assigned, and the TEID and the IP address of the SeNB are notified to the SGW, and the SGW sends the downlink data in the bearer to the new TEID and IP address, that is, It is sent to the SeNB and then transmitted in the SCell. Since the SGW belongs to the network element in the core network (Core Network, CN), the method of placing the traffic point of the data stream on the CN needs to notify the CN every time the SCell is added or deleted, because the SCell is generally tiny. There are a large number of areas, so the addition and deletion of SCells will be frequent, which will result in a large amount of signaling sent to the CN, which contradicts the increase in signaling load in the current 3GPP inter-base station CA discussion. Therefore, the manner in which a large number of SCell signaling is sent to the CN may cause serious signaling load problems.

At present, for the inter-base station CA scheme of IP layer offloading, there is no flexible dynamic offloading on the PeNB or the SGW.

In the embodiment of the present invention, a flexible dynamic offloading can be implemented by deploying a single RAN Controller (SRC) network element on the radio access network (RAN) side.

For a detailed description of the structure relationship between the SRC and the PeNB and the SeNB in the embodiment of the present invention, refer to the schematic architecture of an SRC-based inter-base station carrier aggregation (Inter-eNB CA) as shown in FIG. 1-a. In Figure 1-a, the SRC is deployed on the RAN side, which can also be called the RAN side SRC. The PeNB and the SeNB are respectively connected to the SRC, and the SRC is respectively associated with the Mobility Management Entity (MME) and the SGW/Packet Data Network Gateway. (Packet Data Network Gateway, PGW) connection, wherein an S1-MME connection is established between the Single RAN Controller-Control Plane (SRC-CP) and the MME on the radio access network side, and the user plane of the control node is unified An S1-UP connection is established between the Single RAN Controller-User Plane, SRC-UP and the SGW/PGW, an H3 connection is established between the SRC-CP and the S-CP of the SeNB, and a P-CP between the SRC-CP and the PeNB is established. An H2 connection, an S1UP connection is established between the SRC-UP and the SeNB's Packet Data Convergence Protocol (PDCP) layer, and an S1UP connection is established between the SRC-UP and the PDCP layer of the PeNB. The SeNB includes a PDCP layer and a wireless Radio Link Control (RLC) protocol layer, Media Access Control (MAC) Layer and Physical (PHY) layer. Similarly, a PDCP layer, an RLC layer, a MAC layer, and a PHY layer are also deployed in the PeNB. In addition, an application (Application, APP), an operating system, and a 3GPP modem are included in a User Equipment (UE), where the operating system may specifically refer to multiple operating systems running in the UE, such as Android ( Android) system, etc., the Transmission Control Protocol (TCP) / User Data Protocol (UDP) layer and IP layer are deployed in the operating system, and non-access is deployed in the 3GPP modem (Non Access) Stratum, NAS) layer and Radio Link Control (RRC) layer, an RRC connection is established between the RRC layer in the 3GPP modem and the P-CP in the PeNB, and the PDCP layer is deployed in the 3GPP modem. There is a data stream #1 transmitted or received between the RLC layer, the MAC layer, the PHY layer, the PeNB and the 3GPP modem, and there is a data stream #2 transmitted or received between the SeNB and the 3GPP.

For a more detailed introduction to the structural relationship between the SRC and the PeNB and the SeNB, refer to the composition diagram of the SRC-based Inter-eNB CA shown in Figure 1-b, where the RAN side is deployed. An SRC is connected to the MME and the SGW/PGW, and the SRC is connected to the SeNB and the PeNB respectively. The SeNB and the PeNB are also respectively connected to the UE. See another SRC-based Inter as shown in Figure 1-c. - The composition of the eNB CA is a trunking diagram, in which an SRC is deployed on the RAN side, the SRC is connected to the MME, the SGW/PGW, and the SRC is respectively connected to the SeNB and the PeNB, and the SeNB and the PeNB are respectively connected to the UE, and the PeNB The SeNB is also connected to each other.

A new network element, that is, the SRC described in the embodiment of the present invention, is added between the Core Network (CN) and the evolved NodeB (eNB). The SRC is deployed on the RAN side, and the SRC is connected to the PeNB and the SeNB respectively, and the SRC is used as the split point of the data stream. Therefore, in the implementation method of the carrier aggregation provided by the embodiment of the present invention, the split point is not placed in the PeNB, and the data stream not transmitted by the PeNB is not required. It does not pass through the PeNB, and avoids the problem of the loop on the PeNb. Since the SRC is deployed as the split point on the RAN side, the split point is not placed on the SGW. Therefore, even if the signaling of the SCell is added or deleted frequently, it will not pass through the core network. The signaling sent to the CN is not increased.

The implementation methods of carrier aggregation based on PeNB, SeNB, and SRC are described in detail below. The SCell is a cell that the PeNB adds to the inter-base station CA of the PeNB and the SeNB for the UE. The SeNB manages the SCell, the UE is attached to the PCell, the PCell is managed by the PeNB, and the PeNB and the SeNB are respectively connected to the SRC.

2 is a method for implementing carrier aggregation according to an embodiment of the present invention, which may include: 201. The PeNB acquires the SCell according to the neighboring area measurement report reported by the UE.

The UE reports the neighboring cell measurement report to the PeNB through the neighboring cell measurement. If the PeNB determines that the SCell performing carrier aggregation is not the cell to which the PeNB belongs, the PeNB determines to perform the Inter-eNB CA, and the SCell is the target cell selected by the PeNB according to the neighboring cell measurement report. The SCell is managed by the SeNB.

202. The PeNB sends a secondary cell addition request message to the SeNB, so that the SeNB migrates to the SCell based on the evolved packet system bearer carried in the cell addition request message (Evolved Packet).

System-Bearer, EPS-Bearer) allocates the corresponding air interface resources.

Among them, the EPS-Bearer that is migrated to SCell belongs to the EPS-Bearer established for the UE in PCell. The UE can establish two or more EPS-Bearers in the PCell.

It can be determined by the PeNB that the EPS-Bearer EPS-Bearer that needs to be migrated to the SCell can carry the Evolved Packet System-Bearer Identity through the Evolved Packet System-Bearer Identity.

EPS-Bearer ID) to indicate. When the UE establishes more than two EPS-Bearers in the PCell,

The PeNB may determine to migrate one EPS-Bearer or two EPS-Bearers of the multiple EPS-Bearers to the SCell. The PeNB may determine the manner in which the EPS-Bearer is migrated to the SCell. For example, the PeNB may decide which one or which EPS-Bearers to migrate to the SCell according to the load information of the SCell, the service characteristic information of the UE, and the like. Optionally, the EPS-Bearer that is migrated to the SCell may also be determined by the SRC. For details, refer to the description of the SRC in the following embodiments.

After the PeNB determines that the EPS-Bearer is migrated to the SCell, the PeNB will determine the migrated

The EPS-Bearer is carried in the slave cell addition request message, and transmits a slave cell addition request message to the SeNB via the SRC. The request to increase the request message from the cell may specifically include determining the migrated

EPS-Bearer ID.

Optionally, the PeNB sends the cell addition request message directly to the SeNB.

After receiving the cell addition request message, the SeNB may obtain the EPS-Bearer that is migrated to the SCell by using the cell addition request message, and the SeNB configures the air interface resource for the EPS-Bearer that is migrated to the SCell, and the SeNB may carry the configured air interface resource. In the cell addition response message, it is sent to the PeNB via the SRC or directly to the PeNB.

203. The PeNB receives a secondary cell increase response message sent by the SeNB.

The SeNB is configured to carry the air interface resource configured by the EPS-Bearer that is migrated to the SCell.

The PeNB may directly receive the secondary cell addition response message transmitted from the SeNB. Optionally, the PeNB receives the secondary cell increase response message sent by the SeNB via the SRC.

204. The PeNB sends an RRC reconfiguration message to the UE.

The RRC reconfiguration message carries the air interface resource, so that the UE establishes a DRB between the UE and the SeNB according to the air interface resource, and the DRB corresponds to the EPS-Bearer that is migrated to the SCell.

After the PeNB obtains the air interface resource by adding the response message from the cell, the PeNB carries the configuration of the air interface resource in the RRC reconfiguration message and sends the message to the UE, so that the UE establishes the DRB of the UE and the SeNB according to the air interface resource, and the DRB and the DRB are migrated to the SCell. The EPS-Bearer corresponds to the data channel between the UE and the SeNB after the DRB is established between the UE and the SeNB and the DRB establishes a binding relationship with the EPS-Bearer.

205. The PeNB sends a secondary cell activation message to the SRC, so that the UE performs the inter-base station CA by using the PCell and the SCell.

After the PeNB sends the RRC reconfiguration to the UE successfully, the PeNB sends a secondary cell activation message to the SRC, and the data flow in the SCell can be activated. If the SRC receives the downlink data flow from the SGW/PGW, the SRC can pass the SRC and the SeNB. A good data channel is established between the downlink data stream and the SeNB, so that the UE can perform the inter-base station CA by using the PCell and the SCell.

The PeNB acquires an SCell that is added by the UE to perform the inter-base station CA of the PeNB and the SeNB according to the neighboring cell measurement report reported by the UE, and then the PeNB sends a request message for the addition of the cell to the SeNB, and the SeNB configures the air interface resource for the EPS-Bearer that is migrated to the SCell. The SeNB then establishes a data channel with the SRC according to the allocated air interface resource, and the PeNB obtains the air interface resource by using the received cell addition response message, and the PeNB sends an RRC reconfiguration message to the UE, where the RRC reconfiguration message carries the air interface resource. The UE can establish the data radio bearer of the UE and the SeNB according to the air interface resource. Finally, the PeNB sends the cell activation message to the SRC, and the UE can use the PCell and the SCell to perform the inter-base station CA, thereby completing the process of adding the entire SCell. The split point of the data stream establishes carrier aggregation in the case of SRC.

As shown in FIG. 3, the method for implementing carrier aggregation according to another embodiment of the present invention may include:

301. The SeNB receives a secondary cell addition request message.

The EPS-Bearer that is migrated to the SCell is carried in the cell-increment request message, and the EPS-Bearer that is migrated to the SCell is the EPS-Bearer that is established by the UE in the PCell. The SCell is added by the PeNB to the CA between the PeNB and the SeNB. Cell, SCell is based on the UE by the PeNB The cell obtained by reporting the neighboring area measurement report.

The SeNB directly receives the secondary cell addition request message sent by the PeNB.

Optionally, the SeNB receives the secondary cell addition request message sent by the SRC.

302. The SeNB allocates corresponding air interface resources to the EPS-Bearer that is migrated to the SCell.

After the SeNB receives the secondary cell addition request message, the SeNB may acquire the migration to the SCell.

EPS-Bearer, SeNB configures air interface resources for the EPS-Bearer that is migrated to the SCell. The air interface resources configured by the SeNB for the EPS-Bearer may include: configuration parameters of the LI and L2 protocol stacks.

303. The SeNB establishes a data channel with the SRC.

The data channel corresponds to the EPS-Bearer that migrates to SCell.

In the embodiment of the present invention, after the SeNB configures the air interface resource according to the EPS-Bearer that is migrated to the SCell, the SeNB establishes a data channel with the SRC, and the data channel corresponds to the EPS-Bearer of the SCell.

304. The SeNB sends a secondary cell addition response message to the PeNB.

The eNB sends the RRC reconfiguration message to the UE, and the RRC reconfiguration message carries the air interface resource, so that the UE establishes the DRB and DRB of the UE and the SeNB according to the air interface resource resource. The EPS-Bearer corresponding to the SCell is corresponding. After the configuration is successful, the PeNB sends a secondary cell activation message to the SRC, so that the UE performs the inter-base station CA by using the PCell and the SCell.

The SeNB may directly send a secondary cell addition response message to the PeNB, or the SeNB may send a secondary cell addition response message to the PeNB via the SRC.

As shown in FIG. 4, from the perspective of the SRC, an implementation method of carrier aggregation provided by an embodiment of the present invention may include:

401. The SRC establishes a data channel between the SRC and the slave SeNB.

The data channel is corresponding to the EPS-Bearer that is migrated to the SCell. The EPS-Bearer that is migrated to the SCell belongs to the EPS-Bearer established for the UE in the PCell, where the SCell is managed by the SeNB, the PCell is managed by the PeNB, and the PeNB and the SeNB respectively The SRC is connected, and the UE is attached to the PCell.

In the embodiment of the present invention, as shown in FIG. 1-b and FIG. 1-c, the SRC divides the connection between the SGW/PGW and the PeNB, the SeNB into two parts, and can modify the parameters therein. For example, in the process of establishing a user plane bearer, when the SRC receives the MME's radio access bearer setup request (E-RAB SETUP REQUEST) message, the SRC will set the radio access bearer setup request message. The carried IP address is modified to be replaced with the IP address of the SRC. The SRC modifies the TEID carried in the radio access bearer setup request message to the TEID of the data channel between the SRC and the SeNB established by the SRC, and then the modified radio is performed by the SRC. The access bearer setup request message is sent to the PeNB or the SeNB.

It should be noted that, in some embodiments of the present invention, before the step 401 SRC establishes a data channel between the SRC and the slave station SeNB, the embodiment of the present invention may further include the following steps: the SRC forwards the cell addition request message sent by the PeNB. The SeNB forwards the slave cell addition response message sent by the SeNB to the PeNB. That is to say, when the direct communication connection between the PeNB and the SeNB is not possible, the information forwarding function can be performed by the SRC, and the information between the PeNB and the SeNB is forwarded. For details, refer to the description in the foregoing embodiment.

It should be noted that, in some embodiments of the present invention, the SRC establishes a data channel between the SRC and the SeNB, and specifically includes: the SRC establishes a data channel between the SRC and the SeNB under the trigger of the PeNB; or, the SRC is in the SeNB. The data channel between the SRC and the SeNB is established under the trigger.

That is, in the embodiment of the present invention, the SRC establishes a data channel between the SRC and the SeNB, which may be triggered by the PeNB. Specifically, if the SRC receives the secondary cell addition request message sent by the PeNB, the SRC may be based on the secondary cell sent by the PeNB. The request message is added to trigger the establishment of the data channel between the SRC and the SeNB. Specifically, if the SRC receives the slave cell increase request response message sent by the SeNB, the SRC may trigger the establishment of the SRC and the SeNB according to the slave cell increase response message sent by the SeNB. Data channel between.

It should be noted that the SeNB establishes a data channel with the SRC, and the data channel between the SRC and the SeNB describes a data channel establishment process, that is, the SRC configures its own S1UP parameters and the SeNB configures its own S1UP parameters. After completion, the data channel between the SRC and the SeNB is established successfully.

Specifically, the data channel established by the SRC may be a General Packet Radio Service (GPRS) Tunneling Protocol Userplane (GTPU) tunnel, and the identity code of the data channel may specifically be a tunnel endpoint identifier ( Tunnel Endpoint ID, TEID).

402. The SRC receives the secondary cell activation message sent by the PeNB, so that the SRC uses the PCell and the SCell to perform the inter-base station CA for the UE.

In the embodiment of the present invention, after the eNB performs the RRC reconfiguration of the UE successfully, the PeNB sends a secondary cell activation message to the SRC, and the data flow in the SCell can be activated, if the SRC is from the SGW/PGW. After receiving the downlink data stream, the SRC can send the downlink data stream to the SeNB through the established data channel between the SRC and the SeNB, so that the UE can perform the inter-base station CA by using the PCell and the SCell.

It should be noted that, in some embodiments of the present invention, after receiving the cell activation message sent by the PeNB, the step 402SRC may further include the following steps:

The SRC receives the downlink data stream sent by the SGW/PGW;

The SRC sends the downlink data stream to the SeNB through the data channel.

That is to say, after the SCell addition process is completed, the SRC can forward the downlink data stream sent by the SGW/PGW to the SeNB, so that the UE uses the PCell and the SCell to perform the inter-base station CA.

To facilitate a better understanding and implementation of the foregoing solution of the embodiments of the present invention, the following application scenarios are used to specifically describe the added process of the SCell.

FIG. 5 is a schematic flowchart of another method for implementing carrier aggregation according to an embodiment of the present invention, and describes an increasing procedure of a SCell in a method for implementing carrier aggregation.

Before the SCell is added, all user plane bearers are established on the PCell. It is assumed that the UE has two EPS-Bearers, one EPS-Bearer is used for data transmission, and the other idle, idle EPS-Bearer is defined as the auxiliary evolved packet. Assisting EPS-Bearer.

S501. The UE reports the neighboring area measurement report to the PeNB.

The UE generates a neighboring area measurement report by using the neighboring area measurement, where the neighboring area measurement report includes a neighbor list.

S502. The PeNB sends a first slave cell increase request message to the SRC, that is, the first SCell Addition.

Request message.

The first secondary cell addition request message includes a Cell ID of the SCell to be added.

If the PeNB is to be a CA, the PeNB selects the target cell according to the acquired neighbor cell measurement report. If the selected target cell is not the cell to which the PeNB belongs, the PeNB needs to perform an Inter-eNB CA, and the target cell is an SCell that needs to be added for the Inter-eNB CA. . The PCell to which the UE is currently located, and the base station to which the SCell belongs is the SeNB.

The PeNB sends a first SCell Addition Request message to the SRC.

Optionally, the first SCell Addition Request message may carry parameters such as a Radio Resource Control Context (RRC Context) and a SIAP Context of the PCell. The RRC Context and S1AP Context parameters of the PCell can be mainly classified into two types. The first one is the parameters configured or measured by the PeNB itself, such as:

(1) Security: Selected Security Algorithm;

(2) C-RNTI;

(3) System Information: MIB, SIB1, SIB2;

(4) PCell Load Information.

Another type of parameter is the parameter passed from the MME. There are two ways to handle this type of parameter. One is provided by the PeNB, and the other is directly provided by the SRC. Such parameters can be:

(1) UE Capabilities;

(2) Bearer Related Info: QoS, AMBR, EPS-Bearer ID, etc.;

(3) Security Key;

(4) SPID.

S503. The SRC sends a second secondary cell addition request message, that is, a second SCell Addition Request message, to the SeNB.

After receiving the first SCell Addition Request message, the SRC can perform the following processing:

(1) The SRC determines the EPS-Bearer that needs to be migrated to the SCell;

The EPS-Bearer that is migrated to the SCell belongs to the EPS-Bearer established for the UE in the PCell. The SRC determines which EPS-Bearer in the EPS-Bearer established in the PCell will be migrated to the SCell according to the first SCell Addition Request message.

(2) The SRC establishes the SRC to the GTPU tunnel of the SeNB for the EPS-Bearer that is migrated to the SCell, and allocates the TEID and IP address of the local end;

If there are multiple EPS-Bearers that are migrated to the SCell, the SRC establishes a GTPU tunnel between the SRC and the SeNB for each EPS-Bearer, and assigns the TEID and IP address of the local end.

(3) the SRC constructs a second SCell Addition Request message sent to the SeNB;

The SRC repackages the first SCell Addition Request message into the second SCell Addition

The request message, the second SCell Addition Request message includes the EPS-Bearer information to be migrated to the SCell and/or the SRC to allocate the TEID and IP address of the local end to the EPS-Bearer that is migrated to the SCell.

SRC provides, then SRC will MME

(4) The SRC sends a second SCell Addition Request message to the SeNB.

S504: The SeNB sends a second secondary cell add response message, that is, a second SCell Addition Response message, to the SRC.

After receiving the second SCell Addition Request message sent by the SRC, the SeNB allocates air interface resources (for example, LI and L2 resources) to the EPS-Bearer that is migrated to the SCell, and allocates the TEID and IP address of the S1UP to the EPS-Bearer that is migrated to the SCell. .

The SeNB constructs a second SCell Addition Response message.

The second SCell Addition Response message includes the air interface resource configured as described above. The second SCell Addition Response message also needs to include related parameters (TEID and IP address) of the SI UP, and the parameters are used by the SeNB and the SRC. The channel is established. Optionally, in order for the SRC to perform more accurate traffic distribution, the SCell load information may be carried in the second SCell Addition Response message.

The SeNB sends a second SCell Addition Response message to the SRC.

S505: The SRC sends a first secondary cell add response message, that is, a first SCell Addition Response message, to the PeNB.

The air interface resource configured by the SeNB for the EPS-Bearer that is migrated to the SCell is obtained from the second SCell Addition Response message.

The SRC sends a first SCell Addition Response message to the PeNB, where the SeNB is an air interface resource configured by the SeNB for the EPS-Bearer that is migrated to the SCell.

A channel between the SRC and the SeNB, for example, an S1UP tunnel, is established by using the second SCell Addition Request message and the second SCell Addition Response message.

At the same time, the SRC needs to determine how the data stream is offloaded according to a certain algorithm. For example, in the idle EPS-bearer, there is no data stream transmission, so some data in the original Data Bearer can be divided into the idle EPS-bearer, and the data to be distributed is distributed to the SCell for transmission, which can be performed according to various factors. Dynamic shunting.

S506. The PeNB sends an RRC reconfiguration message to the UE.

After receiving the first SCell Addition Response message, the PeNB sends an RRC reconfiguration message to the UE, where the RRC reconfiguration message includes:

The SeNB is an air interface resource that is configured to be migrated to the EPS-EPS of the SCell, so that the UE establishes the DRB of the UE and the SeNB according to the air interface resource, and the DRB and the EPS-Bearer that is migrated to the SCell. Corresponding; and/or carrier information added for the UE.

S507. The PeNB sends a SCell Activation Start message to the SRC. After the RRC reconfiguration succeeds, the PeNB sends a SCell Activation Start message to the SRC, so that the UE performs the inter-base station CA by using the PCell and the SCell.

Optionally, the PeNB may determine that the EPS-Bearer needs to be migrated to the SCell, and the information about the EPS-Bearer that needs to be migrated to the SCell is sent to the SRC by using the first secondary cell addition request message.

After the SCELL addition process is completed, if the SRC receives the downlink data stream from the SGW/PGW, the SRC can send the downlink data stream to the SeNB through the established data channel.

FIG. 6 is a schematic flowchart of another method for implementing carrier aggregation according to an embodiment of the present invention, and describes another process for increasing the SCell in the method for implementing carrier aggregation, which may include:

5601. The UE reports a neighboring area measurement report to the PeNB.

The UE generates a neighboring area measurement report by using the neighboring area measurement, where the neighboring area measurement report includes a neighboring area list.

5602. The PeNB sends a SCell Addition Request message to the SeNB.

The SCell Addition Request message contains the Cell ID of the SCell to be added.

If the target cell selected by the PeNB for the CA from the neighboring cell measurement report belongs to the SeNB, that is, does not belong to the PeNB, the PeNB needs to perform an Inter-eNB CA, where the target cell is an SCell that needs to be added by the Inter-eNB CA, and the cell where the UE is currently located. PCell.

The PeNB sends a SCell Addition Request message to the SeNB.

In order to assist the SeNB in configuring the air interface resource, the SCell Addition Request message may also carry parameters such as the RRC Context and the S1AP Context of the PCell.

PCell's RRC Context, S1AP Context parameters are described in the previous section.

The PeNB decides to migrate to the EPS-Bearer in the SCell, and the EPS-Bearer that is migrated to the SCell belongs to the EPS-Bearer established for the UE in the PCell.

The information about the EPS-Bearer that needs to be migrated to the SCell is sent to the SeNB through the SCell Addition Request message. S603. The SeNB sends a SCell Addition Response message to the PeNB.

After the SeNB receives the SCell Addition Request message sent by the PeNB, the SeNB allocates the air interface resources (for example, L1 and L2 resources) to the EPS-Bearer that is migrated to the SCell, and allocates the TEID and IP address of the S1UP to the EPS-Bearer that is migrated to the SCell.

The SeNB constructs an SCell Addition Response message, which includes the air interface resources configured as described above. And sending an SCell Addition Response message to the PeNB.

5604. The PeNB sends an RRC reconfiguration message to the UE.

After receiving the SCell Addition Response message, the PeNB sends an RRC reconfiguration message to the UE.

S605: The SeNB sends a SCell Tunnel Setup Request message to the SRC.

The SeNB sends the TEID and IP address of the S1UP allocated to the EPS-Bearer of the SCell to the SRC through the SCell Tunnel Setup Request message.

S606. The SRC sends a SCCM Tunnel Setup Response message to the SeNB.

After receiving the SCell Tunnel Setup Request message, the SRC is migrated to the SCell.

The EPS-Bearer establishes a GTPU tunnel from the SRC to the SeNB, and allocates the TEID and IP address of the local end.

The above information is sent to the SeNB through the SCell Tunnel Setup Response message.

A GTPU tunnel between the SRC and the SeNB, such as an S1UP tunnel, is established through S605 and S606. The sequence of execution of steps S604 and S605 and S606 is not limited in the embodiment of the present invention. S607. The PeNB sends a SCell Activation Start message to the SRC.

After the RRC reconfiguration succeeds, the PeNB sends a SCell Activation Start message to the SRC, so that the UE performs the inter-base station CA by using the PCell and the SCell.

FIG. 7 is a schematic flowchart of another method for implementing carrier aggregation according to an embodiment of the present invention, and describes another process for increasing the SCell in the method for implementing carrier aggregation, which may include:

S701. The UE reports a neighboring area measurement report to the PeNB.

S702. The PeNB sends a SCell Addition Request message to the SeNB.

S703. The SeNB sends a SCell Addition Response message to the PeNB.

S704. The PeNB sends an RRC reconfiguration message to the UE.

S701-S704 is the same as S601~S604, and will not be described in detail here.

S705. The PeNB sends a Data Splitting Start message to the SRC.

After the RRC reconfiguration succeeds, the PeNB sends a Data Splitting Start message to the SRC, so that the UE performs the inter-base station CA by using the PCell and the SCell.

S706. The SRC sends a SCell Tunnel Setup Request message to the SeNB.

After receiving the Data Spliting Start message, the SRC is established for the EPS-Bearer migrated to the SCell. The SRC to the GTPU tunnel of the SeNB allocates the TEID and IP address of the local end.

The SRC will pass the TEID and IP address of the local end assigned to the EPS-Bearer that is migrated to the SCell.

The SCell Tunnel Setup Request message is sent to the SeNB.

S707. The SeNB sends a SCCM Tunnel Setup Response message to the SRC.

After receiving the SCell Tunnel Setup Request message, the SeNB is migrated to the SCell.

EPS-Bearer assigns the TEID and IP address of the SIUP. The TEID and IP address of the S1UP assigned to the EPS-Bearer that is migrated to the SCell are sent to the SRC through the SCell Tunnel Setup Response message.

A GTPU tunnel between the SRC and the SeNB, such as an S1UP tunnel, is established through S706 and S707. Optionally, in FIG. 5 or FIG. 6 , if there is an abnormal situation, after the SRC receives the SCell Activation Start message sent by the PeNB, and finds that the tunnel between the SRC and the SeNB is abnormal or not established, the process may go through steps S706 and S707. The GTPU tunnel between the SRC and the SeNB is re-established to perform inter-base station CA. Under the premise that the shunting point is located in the SRC, the SCell is added by the above method, so that the UE can use the PCell and the SCell to perform inter-base station CA to implement carrier aggregation. The split point of the data stream is established in the SRC. The data stream that does not need to be transmitted by the PeNB does not pass through the PeNB, so the problem of the loop loop on the PeNB is avoided, and the split point of the data stream does not need to be established in the SGW, so even if the SCell is added. The signaling is frequent and does not pass through the core network, avoiding increasing the signaling load of the core network.

The addition process of the SCell is described in the foregoing embodiments of the invention, and is provided by the embodiment of the present invention.

SCell's deletion process is explained.

Referring to FIG. 8-a, a method for implementing carrier aggregation according to another embodiment of the present invention may include:

801a. The PeNB determines to delete the SCell according to the neighboring area measurement report reported by the UE.

The SCell is a secondary cell in which the UE uses the PeNB and the SeNB to perform inter-base station CA, the SeNB manages the SCell, the UE is attached to the PCell, the PCell is managed by the PeNB, and the PeNB and the SeNB are respectively connected to the SRC.

It should be noted that, in the embodiment of the present invention, the foregoing embodiment details the process of adding the SRC. After the SCell is added to the UE, the UE may use the PeNB and the SeNB to perform inter-base station CA, when the neighboring area is reported according to the UE. The report finds that the SCell does not meet the CA requirements, and the PeNB determines Remove the SCell. Among them, the neighboring area list is included in the neighboring area measurement report.

802a, the PeNB sends a first slave cell deletion request message to the SRC.

After the PeNB determines that the SCell needs to be deleted, the cell ID of the SCell and the UE ID of the UE are carried in the first slave cell deletion request message and sent to the SRC, so that the SRC stops the data offloading by the SeNB (specifically, it may be stopped. The SeNB sends a downlink data stream).

803a: After receiving the first slave cell deletion response message sent by the SRC, the PeNB sends an RRC reconfiguration message to the UE.

The PeNB sends an RRC reconfiguration message to the UE, and the UE reconfigures the EPS-Bearer on the SCell to the DRB of the PeNB according to the received RRC reconfiguration message.

The PeNB determines, according to the neighboring cell measurement report reported by the UE, that the base station that will perform the PeNB and the SeNB

The SCell of the CA is deleted, and the first slave cell sends a request message to the SRC, so that the SRC stops the downlink data forwarding by the SeNB, and sends an RRC reconfiguration message to the UE, so that the UE stops sending the uplink data stream through the SeNB, thereby The SCell deletion process is completed, which ensures the integrity of the SCell solution for the implementation of carrier aggregation.

FIG. 8 is a method for implementing carrier aggregation according to another embodiment of the present invention, and describes how to delete a SCell from the perspective of an SRC.

801b. The SRC receives the first slave cell deletion request message sent by the PeNB.

802b, according to the received first slave cell deletion request message, the SRC stops sending the downlink data stream to the UE through the SeNB.

After receiving the first slave cell deletion request message, the SRC acquires the SCell to be deleted, and then the SRC stops sending the downlink data stream to the SeNB to which the SCell to be deleted belongs, that is, stops the downlink data forwarding.

After receiving the first slave cell deletion request message sent by the PeNB, the SRC stops sending the downlink data stream to the SeNB to which the SCell to be deleted belongs, and then the SRC sends a first slave cell deletion response message to the PeNB, so that the PeNB receives the first slave. After the cell delete response message, the PeNB can learn that the SRC has stopped transmitting the downlink data stream to the SeNB.

It should be noted that after the SRC stops sending the downlink data stream to the SeNB according to the received first slave cell deletion request message, the method may further include the following steps: the SRC sends a second slave cell deletion request message to the SeNB, so that the SeNB is released as The air interface resource allocated by the EPS-EPS of the SCell, and the receiving SeNB sends a second secondary cell deletion response message. To facilitate a better understanding and implementation of the above solution of the embodiment of the present invention, the deletion process of the SCell is specifically described below.

FIG. 9 is a schematic flowchart of a method for implementing another carrier aggregation according to an embodiment of the present invention, and describes a process for deleting a SCell in a method for implementing carrier aggregation, which may include:

First, the UE is in the Inter-eNB CA state, that is, the UE communicates with the PeNB and the SeNB at the same time.

S901: The UE reports a neighboring area measurement report to the PeNB.

S902. The PeNB sends a first slave cell deletion request message to the SRC, that is, the first SCell Delete.

Request message.

According to the neighboring area measurement report reported by the UE, the SCell does not meet the CA requirement, and the PeNB determines to delete the SCell; and sends a first SCell Delete Request message to the SRC, where the first SCell Delete Request message carries the Cell ID of the SCell and the UE of the UE. ID, etc.

S903. The SRC sends a first slave cell deletion response message to the PeNB, that is, the first SCell Delete.

Response message.

After receiving the first SCell Delete Request message, the SRC stops data forwarding by using the SeNB, and then sends a first SCell Delete Response message to the PeNB.

5904. The PeNB sends an RRC reconfiguration message to the UE.

After receiving the first SCell Delete Response message sent by the SRC, the PeNB sends an RRC reconfiguration message to the UE, deletes the SCell, and reconfigures the EPS-Bearer on the SCell to the DRB of the PeNB. So that the UE stops uplink data transmission through the SeNB.

S905: The SRC sends a second slave cell deletion request message, that is, a second SCell Delete Request message, to the SeNB.

The second SCell Delete Request message is used to enable the SeNB to release the air interface resource allocated to the EPS-Bearer of the SCell.

S906: The SeNB sends a second slave cell deletion response message, that is, a second SCell Delete Response message, to the SRC.

After releasing the air interface resource, the SeNB sends a second SCell Delete Response message to the SRC. Deleting by using the second SCell Delete Request message and the second SCell Delete Response message In addition to the tunnel between the SRC and the SeNB.

It should be noted that, in order to prevent the SeNB from releasing the air interface resource earlier than the RRC reconfiguration, the uplink data transmission fails. In the embodiment of the present invention, step S905 may be replaced by: the PeNB sends a second secondary cell deletion request message to the SeNB, and the step S906 may be replaced by: the SeNB feeds back the second secondary cell deletion response message, that is, the second SCell Delete Response message, to the PeNB. . Compared with the foregoing embodiment shown in FIG. 9, after the RRC reconfiguration, the second slave cell deletion request message may be sent by the PeNB to the SeNB, so that the SeNB initiates resource release, which has the embodiment shown in FIG. Better implementation results.

The PeNB first determines to delete the SCell according to the neighboring cell measurement report reported by the UE, and then the first slave cell delete request message sent by the PeNB to the SRC, the SRC may stop sending the downlink data flow through the SeNB, and then the PeNB sends the RRC reconfiguration message to the UE, then the PeNB sends the RRC reconfiguration message to the UE. The UE stops the sending of the uplink data stream by the SeNB according to the RRC reconfiguration message, thereby completing the deletion process of the entire SCell, and ensuring the scheme integrity of the SCell implementation method of the carrier aggregation implementation method. The split point of the data stream does not need to be established in the SGW. Therefore, even if the signaling of the SCell is deleted frequently, it does not pass through the core network, and the signaling load of the core network is not increased.

The foregoing embodiment mainly introduces an implementation manner of adding and deleting an SCell in the implementation method of the carrier aggregation provided by the embodiment of the present invention. Next, a method for dynamically adjusting a data flow in the implementation method of the carrier aggregation provided by the embodiment of the present invention is introduced. The example may include: the SRC receives the load information and the link quality information reported by the PeNB and/or the SeNB; the SRC adjusts the offload policy according to the load information and the link quality information; and the SRC carries the EPS-Bearer on the PCell and the SCell according to the foregoing splitting policy. The data stream is adjusted.

Referring to FIG. 10, a method for implementing carrier aggregation according to another embodiment of the present invention may include:

1001. The SRC receives load information and link quality information reported by the PeNB and/or the SeNB. In the embodiment of the present invention, the SRC is deployed on the RAN side, and the SRC is connected to the PeNB and the SeNB respectively. The PeNB sends its own load information and link quality information to the SRC, and the SeNB can also report its own load information and chain to the SRC. Road quality information. The load information may include: an air interface load, a central processing unit (CPU), a processing load, and a transmission load.

1002. The SRC adjusts the offload policy according to the foregoing load information and link quality information.

In the embodiment of the present invention, the SRC receives the load information and chain reported by the PeNB and/or the SeNB. After the path quality information, the SRC can adjust the traffic offloading policy according to the load condition of the PeNB and the SeNB and the link quality. The traffic splitting policy is that the SRC determines how to offload the data flow according to a preset algorithm.

The SRC adjusts the traffic distribution policy according to the load information and the link quality information of the PeNB and the SeNB collected by the SRC. Different implementation modes can be implemented in the actual application. If the PeNB and the SeNB report their own load information to the SRC, and the SRC obtains their load information and finds that the SCell site is idle, and the PCell site is busy, if only one EPS-Bearer bearer is established, the SRC can adjust the offload policy to The data stream is adjusted from the PCell to the SCell. If the PeNB and the SeNB report their link quality information to the SRC respectively, the SRC obtains the link quality information and finds that the link quality of the SCell site is better, and the link quality of the PCell site is better. Poorly, if only one EPS-Bearer bearer is established, the SRC can adjust the offloading policy to adjust the data flow from the PCell to the SCell. If the PeNB and the SeNB report their own load information to the SRC, the SRC obtains their load information. It is found that the SCell site is relatively idle, while the PCell site is busy, if there are two The EPS-Bearer bearer, EPS-Bearer 1 and EPS-Bearer2, respectively, can adjust the offloading strategy to split a part of the data in the EPS-Bearerl bearer onto the EPS-Bearer2, which is from EPS-Bearer2. Transfer the data stream that is split. The above is just an example of the adjustment of the traffic distribution policy. In practice, you can decide how to adjust the traffic distribution policy according to the application environment.

1003. The SRC adjusts the data flow carried by the EPS-Bearer on the PCell and the SCell according to the foregoing splitting policy.

In the embodiment of the present invention, after the SRC adjusts the traffic distribution policy according to the load information and the link quality information reported by the SeNB, the SRC adjusts the data flow carried by the EPS-Bearer on the PCell and the SCell according to the adjusted traffic distribution policy, where The SRC can adjust the data flow carried by the EPS-Bearer on the PCell and the SCell according to the different splitting policies set by the SRC. For example, as follows, the data flow carried by the EPS-Bearer on the PCell and the SCell may be adjusted according to the traffic distribution policy, and may specifically include at least one implementation manner of the following implementation manners:

Adjust the data flow carried on the EPS-Bearer to the idle station in the above PCell and the above SCell; or,

Adjusting the data flow carried on the EPS-Bearer to the site with good link quality in the above PCell and the above SCell; or The data stream carried on the EPS-Bearer is distributed from the PCell to a part of the data to the SCell.

It should be noted that, in step 1003, the SRC adjusts the data flow carried on the EPS-Bearer according to how the SRC adjusts the traffic off policy in the foregoing step 1002. Therefore, in the step 1003, the SRC adjusts the data flow carried on the EPS-Bearer. It is to be determined in a flexible manner according to a specific application scenario, and is merely illustrative and not limiting as to the present invention.

After the SSR adjusts the data stream carried by the EPS-Bearer on the PCell and the SCell according to the foregoing splitting policy, the SRC may further include the following steps:

The SRC sends a control message to the PeNB and/or the SeNB to adjust the QoS (Quality of Service) information of the PeNB and/or the SeNB.

The SRC sends control messages to the PeNB and the SeNB to transmit control signaling using the control channels established by the SRC and the PeNB and the SeNB. The SeNB controls the PeNB and the SeNB to adjust the QoS information.

In another embodiment of the present invention, after the step 1003SRC adjusts the data flow carried by the EPS-Bearer on the PCell and the SCell according to the foregoing splitting policy, the method may further include the following steps:

The SRC sends an RRC reconfiguration indication message to the PeNB, so that the PeNB receives the RRC reconfiguration indication message, adjusts the binding relationship between the EPS-Bearer and the DRB of the PeNB, and sends an RRC reconfiguration message to the UE. The binding relationship between the EPS-Bearer in the UE and the DRB of the PeNB is updated.

That is, when the PeNB adjusts the binding relationship between the EPS-Bearer and the DRB of the PeNB according to the RRC reconfiguration indication message sent by the SRC, and sends an RRC reconfiguration message to the UE, the UE also updates the EPS-Bearer and the PeNB. The binding relationship between the DRBs, and thus, if the uplink data stream sent by the UE, the distribution of the EPS-Bearer carrying the upstream data stream in the PCell and the SCell will be changed.

It can be seen from the foregoing embodiment that after receiving the load information and the link quality information reported by the PeNB and the SeNB, the SRC can adjust the offload policy according to the load information and the link quality information, and finally the SRC according to the adjusted offload policy to the EPS-Bearer The data flows carried on the PCell and the SCell are adjusted. If the downlink data stream is carried on the EPS-Bearer, the dynamic adjustment of the downlink data flow in the PCell and the SCell can be implemented to meet the downlink load balancing or select according to the link quality. Demand The EPS-Bearer carries the uplink data stream, which can dynamically adjust the uplink data stream in the PCell and SCell to meet the requirements of uplink load balancing and performance improvement.

To facilitate a better understanding and implementation of the above solution of the embodiments of the present invention, the following application scenarios are specifically illustrated.

FIG. 11 is a schematic flowchart of another method for implementing carrier aggregation according to an embodiment of the present invention, and describes a process for dynamically adjusting a downlink data flow in a method for implementing carrier aggregation, which may include:

It is assumed that the UE has only one EPS-Bearer bearer, and the inter-base station CA of the PeNB and the SeNB has been established in the UE.

S1101: The SeNB reports load information, link quality information, and the like to the SRC; the load information may be an air interface load, a CPU processing load, a transmission load, and the like;

51102. The PeNB reports load information, link quality information, and the like to the SRC. The load information may be an air interface load, a CPU processing load, a transmission load, and the like.

51103. The SRC collects related information of each eNB to adjust a traffic offloading policy, such as dividing the data flow into some idle stations, or dividing the data flow into some sites with good link quality, etc., according to the adjusted traffic distribution policy to the EPS- Bearer adjusts the data flow carried on PCell and SCell.

FIG. 12 is a schematic flowchart of another method for implementing carrier aggregation according to an embodiment of the present invention, and describes a process for dynamically adjusting a downlink data flow in a method for implementing carrier aggregation, which may include:

Assume that the UE has multiple EPS-Bearer bearers, and then the UE has two EPS-Bearer bearers.

(EPS-Bearerl and EPS-Bearer2 respectively) are explained as an example.

51201. The SeNB reports load information, link quality information, and the like to the SRC. The load information may be an air interface load, a CPU processing load, a transmission load, and the like.

51202. The PeNB reports load information, link quality information, and the like to the SRC. The load information may be an air interface load, a CPU processing load, a transmission load, and the like.

51203. The SRC collects related information of each eNB to adjust a traffic off policy, such as dividing the data flow into some idle stations, or dividing the data flow into some sites with good link quality, etc., according to the adjusted traffic distribution policy to the EPS- The Bearer adjusts the data flows carried on the PCell and the SCell. For example, the SRC can cross-transmit the data on two bearers according to the load information, the amount of data carried, and the like. For example, suppose the data traffic on EPS-Bearerl is large, but the PeNB load is higher. If the SRC is adjusted, the data stream on the EPS-Bearer 1 can be split to a part of the data stream and adjusted to the SeNB.

Optionally, if necessary, the SRC may send a control message to the PeNB or the SeNB to adjust the QoS information of each bearer.

FIG. 13 is a schematic flowchart of another method for implementing carrier aggregation according to an embodiment of the present invention, and describes a process for dynamically adjusting an uplink data stream in a method for implementing carrier aggregation, which may include:

Assume that the UE has multiple EPS-Bearer bearers, and then the UE has two EPS-Bearer bearers (EPS-Bearerl and EPS-Bearer2 respectively) as an example. The UE has two bearers transmitting data.

51301. The SeNB reports load information, link quality information, and the like to the SRC. The load information may be an air interface load, a CPU processing load, a transmission load, and the like.

51302. The PeNB reports load information, link quality information, and the like to the SRC. The load information may be an air interface load, a CPU processing load, a transmission load, and the like.

S1303, SRC can be adjusted according to the load information, the amount of data carried, etc.

Distribution in PCell or SCell.

S304: The SRC sends an RRC reconfiguration indication message to the PeNB.

After receiving the message, the PeNB re-binds the binding relationship between the EPS-Bearer ID and the DRB, and sends an RRC reconfiguration message to update the binding relationship in the UE. This update will result in redistribution of the upstream bearers in PCell and SCell.

Optionally, if necessary, the SRC may send a control message to the PeNB or the SeNB to adjust the QoS of each bearer.

The embodiment shown in Figures 11 through 13 gives an example of dynamically adjusting the distribution of data streams in a PCell or SCell. Through this dynamic adjustment, there are the following gains: Dynamic adjustment of the downlink data stream in PCell and SCell, meeting the requirements of downlink load balancing or selection according to link quality; dynamic adjustment of uplink data stream in PCell and SCell, satisfying uplink load Equilibrium and performance improvement requirements; further, due to the adjustment, the uplink data may be transmitted in different bearers and different cells, that is, the requirements of uplink and downlink separation are realized; in addition, in the embodiment of the present invention, for one user data The bearer can also implement the Inter-eNB CA function.

It should be noted that, for each of the foregoing method embodiments, for the description of the cartridge, all of them are expressed. It is a combination of actions, but it should be understood by those skilled in the art that the present invention is not limited by the order of the acts described, as some steps may be performed in other sequences or concurrently in accordance with the present invention. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and units involved are not necessarily required by the present invention.

In order to facilitate the better implementation of the above described embodiments of the embodiments of the present invention, related apparatus for implementing the above schemes are also provided below.

Referring to FIG. 14-a, a primary station PeNB 1400 according to an embodiment of the present invention may include: an obtaining unit 1401, a first sending unit 1402, a receiving unit 1403, a second sending unit 1404, and a third sending unit 1405. , among them,

The acquiring unit 1401 is configured to acquire an SCell according to the neighboring cell measurement report reported by the user equipment UE, where the SCell is a cell that is added by the PeNB for the UE to perform inter-base station CA of the PeNB and the secondary station SeNB, where The SeNB manages the SCell, the UE is attached to the primary cell PCell, the PCell is managed by the PeNB, and the PeNB and the SeNB are respectively connected to the unified control node SRC;

The first sending unit 1402 is configured to send a slave cell addition request message to the SeNB, so that the SeNB allocates, according to the evolved packet system bearer EPS-Bearer, that is migrated to the SCell carried in the slave cell increase request message. The air interface resource, wherein the EPS-Bearer migrating to the SCell belongs to an EPS-Bearer established by the UE in the PCell;

The receiving unit 1403 is configured to receive a secondary cell add response message sent by the SeNB, where the secondary cell add response message carries the air interface resource;

The second sending unit 1404 is configured to send a radio resource control protocol RRC reconfiguration message to the UE, where the RRC reconfiguration message carries the air interface resource, so that the UE establishes the UE according to the air interface resource. The data radio bearer DRB of the SeNB, where the DRB corresponds to the EPS-Bearer that migrates to the SCell;

The third sending unit 1405 is configured to send a slave cell activation message to the SRC, so that the UE performs the inter-base station CA by using the PCell and the SCell.

Referring to FIG. 14-b, in some embodiments of the present invention, the PeNB 1400 may further include: a determining unit 1406, configured to determine migration to the SCell, with respect to the PeNB 1400 as shown in FIG. 14-a. EPS-Bearer.

Optionally, the first sending unit 1402 is specifically configured to send, to the SeNB, by using the SRC. Adding a request message from the cell, so that the SeNB allocates a corresponding air interface resource according to the EPS-Bearer that is carried in the cell addition request message and migrates to the SCell, where the EPS-Bearer is migrated to the SCell Determining or determined by the SeNB;

Optionally, the receiving unit 1403 is configured to receive, by using the SRC, a slave cell add response message sent by the SeNB, where the slave cell add response message carries the air interface resource.

The PeNB acquires an SCell that is added by the UE to perform the inter-base station CA of the PeNB and the SeNB according to the neighboring cell measurement report reported by the UE, and then the PeNB sends a request message for the addition of the cell to the SeNB, and the SeNB configures the air interface resource for the EPS-Bearer that is migrated to the SCell. The SeNB then establishes a data channel with the SRC according to the allocated air interface resource, and the PeNB obtains the air interface resource by using the received cell addition response message, and the PeNB sends an RRC reconfiguration message to the UE, where the RRC reconfiguration message carries the air interface resource. The UE can establish the data radio bearer of the UE and the SeNB according to the air interface resource. Finally, the PeNB sends the cell activation message to the SRC, and the UE can use the PCell and the SCell to perform the inter-base station CA, thereby completing the process of adding the entire SCell. Carrier aggregation.

Referring to FIG. 15, a slave SeNB 1500 according to an embodiment of the present invention may include: a receiving unit 1501, an allocating unit 1502, a channel establishing unit 1503, and a sending unit 1504, where

The receiving unit 1501 is configured to receive a slave cell addition request message, where the slave cell increase request message carries an EPS-Bearer that migrates to the slave cell SCell, where the EPS-Bearer that is migrated to the SCell belongs to the UE in the primary cell PCell Established EPS-Bearer;

The allocating unit 1502 is configured to allocate a corresponding air interface resource to the EPS-Bearer that is migrated to the SCell.

a channel establishing unit 1503, configured to establish a data channel with the SRC, where the data channel corresponds to the EPS-Bearer that migrates to the SCell;

The sending unit 1504 is configured to send a slave cell add response message to the PeNB, where the slave cell add response message carries the air interface resource, so that the PeNB sends a radio resource control protocol RRC reconfiguration message to the UE, The RRC reconfiguration message carries the air interface resource, so that the UE establishes a data radio bearer DRB of the UE and the SeNB according to the air interface resource resource, and the DRB and the migration to the SCell The EPS-Bearer corresponds to, after the configuration is successful, the PeNB sends a secondary cell activation message to the SRC, so that the UE performs the inter-base station CA by using the PCell and the SCell. The receiving unit 1501 is configured to directly receive the secondary cell addition request message sent by the PeNB, or receive a secondary cell increase request message sent by using the SRC.

Optionally, the sending unit 1504 is specifically configured to send, by using the SRC, a small cell response message to the PeNB.

Referring to FIG. 16-a, a unified control node SRC1600 provided by the embodiment of the present invention may include: a channel establishing unit 1601, a first receiving unit 1602, where

The channel establishing unit 1601 is configured to establish a data channel between the SRC and the slave station SeNB, where the data channel corresponds to an EPS-Bearer that is migrated to the slave SCell, and the EPS-Bearer that is migrated to the SCell belongs to the user. EPS-Bearer established by the device UE in the primary cell PCell;

The first receiving unit 1602 is configured to receive a secondary cell activation message sent by the PeNB, and use the PCell and the SCell to perform an inter-base station CA for the UE.

Referring to FIG. 16-b, in some embodiments of the present invention, the SRC 1600 may further include: a determining unit 1603 for determining migration to the SCell, with respect to the SRC 1600 as shown in FIG. 16-a. EPS-Bearer.

As shown in Figure 16-c, in some embodiments of the present invention, the SRC 1600 may further include: a first sending unit 1604, configured to send the PeNB, with respect to the SRC 1600 as shown in Figure 16-a. The slave cell adds a request message to be forwarded (specifically, may be re-encapsulated and then forwarded) to the SeNB; and the cell-added response message sent by the SeNB is forwarded (specifically, may be re-encapsulated and then forwarded) to the PeNB. .

In some embodiments of the present invention, the channel establishing unit 1601 is specifically configured to establish a data channel between the SRC and the SeNB under the trigger of the PeNB, or establish the SRC and the trigger by the SeNB. Data channel between SeNBs.

Referring to FIG. 16-d, in some embodiments of the present invention, the SRC1600 may further include: SRC1600, as shown in FIG. 16-a.

a second receiving unit 1605, configured to receive a downlink data stream sent by the serving gateway SGW/public data network gateway PGW;

The second sending unit 1606 is configured to send the downlink data stream to the SeNB by using the data channel.

Referring to FIG. 17-a, a primary station PeNB 1700 according to an embodiment of the present invention may include: an obtaining unit 1701, a first sending unit 1702, a receiving unit 1703, and a second sending unit 1704. among them,

The obtaining unit 1701 is configured to determine to delete the SCell according to the neighboring area measurement report reported by the user equipment UE.

The first sending unit 1702 is configured to send a first slave cell deletion request message to the SRC, so that the SRC stops data splitting by using the SCell.

The receiving unit 1703 is configured to receive a first slave cell deletion response message sent by the SRC, where the second sending unit 1704 is configured to send an RRC reconfiguration message to the UE, so that the UE stops using the SCell to send an uplink. data flow.

Referring to FIG. 17-b, in some embodiments of the present invention, the PeNB 1700 may further include: a third sending unit 1705, for the PeNB 1700, as shown in FIG. The SeNB sends a second slave cell deletion request message, so that the SeNB releases the air interface resource allocated by the EPS-Bearer according to the evolved packet system migrated to the SCell.

Specifically, the third sending unit 1705 is specifically configured to send, by using the SRC, a second slave d, a zone delete request message to the SeNB.

As shown in FIG. 18-a, a unified control node SRC1800 provided by the embodiment of the present invention may include: a receiving unit 1801 and a data flow control unit 1802, where

The receiving unit 1801 is configured to receive a first slave cell deletion request message sent by the PeNB, where the PeNB and the slave station SeNB are respectively connected to the SRC;

The data flow control unit 1802 is configured to stop sending the downlink data flow to the UE through the SeNB according to the received first secondary cell deletion request message.

Referring to FIG. 18-b, in some embodiments of the present invention, the SRC1800 may further include: SRC1800, as shown in FIG. 18-a.

a first sending unit 1803, configured to send, by the data flow control unit, a first secondary cell deletion response message to the PeNB, after stopping sending the downlink data flow to the SeNB according to the received first secondary cell deletion request message. .

Referring to FIG. 18-c, in some embodiments of the present invention, the SRC1800 may further include: SRC1800, as shown in FIG. 18-a.

a second sending unit 1804, configured to send, by the data flow control unit, a second secondary cell deletion request message to the SeNB after stopping sending the downlink data flow to the SeNB according to the received first secondary cell deletion request message. So that the SeNB releases the evolution according to migration to the SCell The packet system carries the air interface resources allocated by the EPS-Bearer.

It can be seen that, after the SRC receives the first secondary cell deletion request message sent by the PeNB, the SRC can stop sending the downlink data flow to the SeNB to which the SCell belongs, thereby completing the SCell deletion process and implementing carrier aggregation release. The implementation of the carrier aggregation method is guaranteed to increase or delete the scheme integrity of the SCell. The split point of the data stream does not need to be established in the SGW. Therefore, even if the signaling of the SCell is deleted frequently, it will not pass through the core network, and the signaling load of the core network is avoided.

Referring to FIG. 19, a carrier aggregation implementation system 1900 according to an embodiment of the present invention may include: the PeNB 1400 according to any one of the foregoing, as shown in FIG. 14-a and FIG. 14-b, as described above. The SeNB 1500 according to any one of the preceding claims, wherein the SeNB 1600, as described in any one of the foregoing Figures 16-a, 16-b, 16-c, and 16-d, wherein the PeNB 1400 And the SeNB 1500 is connected to the SRC 1600, respectively.

The implementation system of the carrier aggregation provided by the embodiment of the present invention is similar to the implementation system of the carrier aggregation shown in FIG. 19, and may include:

The primary station PeNB as described in any of the foregoing Figures 17-a and 17-b, the wireless connection as described in any of the foregoing Figures 18-a, 18-b, and 18-c The network side unified control node SRC and the SeNB, wherein the PeNB and the SeNB are respectively connected to the SRC, and the SeNB is configured to receive a second slave cell deletion request message sent by the PeNB or the SeNB; The air interface resource allocated by the EPS-Bearer is carried according to the evolved packet system migrated to the SCell.

As shown in FIG. 20-a, an SRC2000 according to an embodiment of the present invention may include: a receiving unit 2001, a policy adjusting unit 2002, and a data stream adjusting unit 2003, where

The receiving unit 2001 is configured to receive load information and link quality information reported by the primary station PeNB and/or the secondary station SeNB;

a policy adjustment unit 2002, configured to adjust a traffic off policy according to the load information and link quality information;

a data flow adjustment unit 2003, configured to perform bearer on the evolved packet system according to the offloading policy

The EPS-Bearer adjusts the data stream carried by the carrier aggregation primary cell PCell and the carrier aggregation from the cell SCell.

In some embodiments of the present invention, the data flow adjustment unit 2003 is specifically configured to: adjust a data flow carried on the EPS-Bearer to an idle station in the PCell and the SCell; or, The data flow carried on the EPS-Bearer is adjusted to the PCell and the SCell medium chain a good quality site; or, a data stream carried on the EPS-Bearer is distributed from the PCell to a portion of the data stream to the SCell.

In some embodiments of the present invention, as shown in FIG. 20-b, the carrier aggregation management apparatus 2000 may further include: a sending unit 2004, configured to send a control message to the PeNB and/or the SeNB, so as to enable the The PeNB and/or the SeNB adjust respective quality of service QoS information.

In some embodiments of the present invention, the sending unit 2004 is configured to send a radio resource control protocol RRC reconfiguration indication message to the PeNB, so that after the PeNB receives the RRC reconfiguration indication message, adjust the EPS. a binding relationship between the Bearer and the data service bearer DRB of the PeNB, and sending an RRC reconfiguration message to the user equipment UE, to update the binding between the EPS-Bearer and the DRB of the PeNB in the UE Relationship.

After the receiving unit receives the load information and the link quality information reported by the PeNB and the SeNB, the policy adjustment unit may adjust the traffic off policy according to the load information and the link quality information, and finally the data flow adjusting unit is configured according to the adjusted The traffic splitting policy adjusts the data flows carried by the EPS-Bearer on the PCell and the SCell. If the downlink traffic is carried on the EPS-Bearer, the dynamic adjustment of the downlink data flow in the PCell and the SCell can be implemented to meet the downlink load balancing. Or, according to the requirements of the link quality selection; if the EPS-Bearer carries the uplink data stream, the dynamic adjustment of the uplink data stream in the PCell and the SCell can be implemented to meet the requirements of uplink load balancing and performance improvement.

It should be noted that the information interaction between the units of the foregoing apparatus, the execution process, and the like are based on the same concept as the method embodiment of the present invention, and the technical effects thereof are the same as those of the method embodiment of the present invention. The description in the foregoing method embodiments is invented, and details are not described herein again. The embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium stores a program, and the program executes some or all of the steps described in the foregoing method embodiments.

Next, another PeNB provided by the embodiment of the present invention is introduced. Referring to FIG. 21, the PeNB 2100 includes:

The input device 2101, the output device 2102, the processor 2103, and the memory 2104 (wherein the number of the processors 2103 in the PeNB 2100 may be one or more, and one processor in FIG. 21 is taken as an example). In some embodiments of the present invention, the input device 2101, the output device 2102, the processor 2103, and the memory 2104 may be connected by a bus or other means, wherein example.

The processor 2103 is configured to perform the following steps:

According to the neighboring cell measurement report reported by the user equipment UE, the primary station PeNB acquires the secondary cell, and the SCell is the cell that the PeNB adds to the base station CA of the PeNB and the secondary station SeNB for the UE, where the The SeNB manages the SCell, the UE is attached to the primary cell PCell, and the PCell is managed by the PeNB, and the PeNB and the SeNB are respectively connected to the radio access network RAN side unified control node SRC;

Transmitting, by the SeNB, a cell addition request message, to enable the SeNB to allocate a corresponding air interface resource according to the evolved packet system bearer EPS-Bearer that is carried in the cell increase request message and migrated to the SCell, where The EPS-Bearer that is migrated to the SCell belongs to the EPS-Bearer established for the UE in the PCell;

Receiving, by the SeNB, a slave cell increase response message, where the slave cell add response message carries the air interface resource;

Transmitting a radio resource control protocol RRC reconfiguration message to the UE, where the RRC reconfiguration message carries the air interface resource, so that the UE establishes a data radio bearer DRB of the UE and the SeNB according to the air interface resource. The DRB corresponds to the EPS-Bearer that migrates to the SCell;

And transmitting, by the SRC, a cell activation message, to enable the UE to perform inter-base station CA by using the PCell and the SCell.

In some embodiments of the present invention, the processor 2103 is specifically configured to perform the following steps: Determine an EPS-Bearer that is migrated to the SCell.

In some embodiments of the present invention, the processor 2103 is specifically configured to: send, by using the SRC, a secondary cell addition request message to the SeNB, to enable the SeNB to carry according to the secondary cell increase request message. The EPS-Bearer migrating to the SCell allocates a corresponding air interface resource, and the EPS-Bearer migrating to the SCell is determined by the PeNB or determined by the SRC;

And receiving, by the SRC, a slave cell increase response message sent by the SeNB, where the slave cell add response message carries the air interface resource.

In some embodiments of the present invention, the secondary cell addition request message stored by the memory 2104 further includes at least one of the following parameters: a security algorithm, a cell wireless network temporary identifier. C-RNTL system message, primary cell load information, user equipment capability information, bearer association information Bearer Related Info, security key Security Key, service provision description identifier SPID.

In some embodiments of the present invention, the air interface resource stored by the memory 2104 includes: L1, L2 protocol stack configuration parameters.

Next, another SeNB provided by the embodiment of the present invention is introduced. Referring to FIG. 22,

The SeNB 2200 includes:

The input device 2201, the output device 2202, the processor 2203, and the memory 2204 (wherein the number of the processors 2203 in the SeNB 2200 may be one or more, and one processor in Fig. 22 is taken as an example). In some embodiments of the present invention, the input device 2201, the output device 2202, the processor 2203, and the memory 2204 may be connected by a bus or other means, wherein the bus connection is taken as an example in FIG.

The processor 2203 is configured to perform the following steps:

Receiving a slave cell addition request message, where the slave cell addition request message carries an EPS-Bearer that is migrated to the evolved packet system of the cell SCell, and the EPS-Bearer that is migrated to the SCell belongs to the user equipment UE in the primary cell PCell An established EPS-Bearer, where the SCell is a cell that the primary station PeNB adds to the UE between the PeNB and the SeNB base station CA, and the SCell is obtained by the PeNB according to the neighboring area measurement report reported by the UE. The SeNB manages the SCell, the PeNB manages the PCell, the UE is attached to the PCell, and the PeNB and the SeNB are respectively connected to a radio access network RAN side unified control node SRC;

Allocating corresponding air interface resources to the EPS-Bearer that is migrated to the SCell;

Establishing a data channel with the SRC, where the data channel corresponds to the EPS-Bearer that migrates to the SCell;

And sending, by the PeNB, a slave cell increase response message, where the slave cell add response message carries the air interface resource, so that the PeNB sends a radio resource control protocol RRC reconfiguration message to the UE, where the RRC reconfiguration message is sent. Carrying the air interface resource, so that the UE establishes a data radio bearer DRB of the UE and the SeNB according to the air interface resource resource, where the DRB corresponds to the EPS-Bearer that migrates to the SCell, where After the configuration is successful, the PeNB sends a secondary cell activation message to the SRC, so that the UE performs the inter-base station CA by using the PCell and the SCell.

In some embodiments of the present invention, the processor 2203 is specifically configured to perform the following steps: Receiving a secondary cell addition request message sent by the PeNB;

Or, receiving a secondary cell addition request message sent by the PeNB via the SRC.

In some embodiments of the present invention, the processor 2203 is specifically configured to perform the step of: sending a secondary cell addition response message to the PeNB via the SRC.

In some embodiments of the present invention, the slave cell increase request message stored by the memory 2204 further includes at least one of the following parameters: a selection security algorithm, a cell radio network temporary identifier C-RNTL system message, a primary cell load information, User equipment capability information, bearer association information Bearer Related Info, security key Security Key, service provision description identifier SPID.

In some embodiments of the present invention, the slave cell addition response message stored by the memory 2204 further includes: an identity code of the data channel, and an internet protocol IP address of the SRC.

In some embodiments of the present invention, the air interface resource stored by the memory 2204 includes: configuration parameters of the L1, L2 protocol stack;

Next, another SRC provided by the embodiment of the present invention is introduced. Referring to FIG. 23, the SRC2300 includes:

The input device 2301, the output device 2302, the processor 2303, and the memory 2304 (wherein the number of processors 2303 in the PeNB 2300 may be one or more, and one processor in Fig. 23 is exemplified). In some embodiments of the present invention, the input device 2301, the output device 2302, the processor 2303, and the memory 2304 may be connected by a bus or other means, wherein the bus connection is taken as an example in FIG.

The processor 2303 is configured to perform the following steps:

Establishing a data channel between the SRC and the slave station SeNB, where the data channel corresponds to an EPS-Bearer that is migrated to the evolved packet network of the cell SCell, and the EPS-Bearer that is migrated to the SCell belongs to the user equipment. An EPS-Bearer established by the UE in the primary cell PCell, wherein the SCell is managed by the SeNB, the PCell is managed by the primary station PeNB, the PeNB and the SeNB are respectively connected to the SRC, and the UE is attached to the PCell;

Receiving a secondary cell activation message sent by the PeNB, so that the SRC uses the PCell and the SCell to perform an inter-base station CA for the UE.

In some embodiments of the present invention, the processor 2303 is further configured to perform the following steps: Before establishing the data channel between the SRC and the slave SeNB, determine the EPS-Bearer that is migrated to the SCell.

In some embodiments of the present invention, the processor 2303 is further configured to: perform the following steps: before the establishing a data channel between the SRC and the slave SeNB, forwarding, by the PeNB, a cell addition request message to the SeNB;

The SRC forwards the slave cell addition response message sent by the SeNB to the PeNB. In some embodiments of the present invention, the processor 2303 is specifically configured to: perform a data channel between the SRC and the SeNB under the trigger of the PeNB; or establish a setup under the trigger of the SeNB The data channel between the SRC and the SeNB. In some embodiments of the present invention, the data channel stored by the memory 2304 is a General Packet Radio Service GPRS Tunneling Protocol user plane GTPU tunnel, and the identity code of the data channel is a tunnel endpoint identifier TEID.

In some embodiments of the present invention, the processor 2303 is further configured to: after receiving the slave cell activation message sent by the PeNB, receive the downlink data stream sent by the serving gateway SGW/the public data network gateway PGW; The data channel sends the downlink data stream to the SeNB.

Next, another PeNB provided by the embodiment of the present invention is similar to the PeNB shown in FIG. 21, except that the execution function of the processor is as follows. The PeNB includes: an input device, an output device, and a processing. And a memory (wherein the number of processors in the PeNB may be one or more, specifically one processor may be taken as an example). In some embodiments of the present invention, the input device, the output device, the processor, and the memory may be connected by a bus or other means, wherein the bus connection may be specifically exemplified.

The processor is configured to perform the following steps:

And determining, by the neighboring cell measurement report reported by the user equipment UE, that the SCell is a cell that is used by the UE to perform inter-base station CA by using the PeNB and the secondary station SeNB, where the SeNB manages the SCell. The UE is attached to the primary cell PCell, the PCell is managed by the PeNB, and the PeNB and the SeNB are respectively connected to the unified control node SRC;

Sending a first slave cell deletion request message to the SRC, so that the SRC stops sending the downlink data stream by using the SeNB;

After receiving the first slave cell deletion response message sent by the SRC, sending the radio resource to the UE Controlling a protocol RRC reconfiguration message to cause the UE to stop using the SCell to send an upstream data stream.

In some embodiments of the present invention, the processor is further configured to: after the PeNB sends the radio resource control protocol RRC reconfiguration message to the UE, the method further includes:

And the PeNB sends a second slave cell deletion request message to the SeNB, so that the SeNB releases the air interface resource allocated by the EPS-Bearer according to the evolved packet system that is migrated to the SCell.

In some embodiments of the present invention, the processor is specifically configured to perform the following steps: the PeNB sends a second slave cell deletion request message to the SeNB by using the SRC.

Next, another SRC provided by the embodiment of the present invention is similar to the composition of the SRC shown in FIG. 23, except that the execution function of the processor is as follows. The SRC includes:

The input device, the output device, the processor, and the memory (wherein the number of processors in the SRC may be one or more, specifically, one processor may be exemplified). In some embodiments of the present invention, the input device, the output device, the processor, and the memory may be connected by a bus or other means, wherein, specifically, a bus connection may be taken as an example.

The processor is configured to perform the following steps:

Receiving a first slave cell deletion request message sent by the primary station PeNB, where the PeNB and the secondary station SeNB are respectively connected to the SRC;

And stopping sending the downlink data stream to the SeNB according to the received first slave cell deletion request message.

In some embodiments of the present invention, the processor is specifically configured to: perform the following steps: after sending the downlink data stream to the SeNB according to the received first slave cell deletion request message, sending the first slave to the PeNB Cell delete response message.

In some embodiments of the present invention, the processor is specifically configured to perform the following steps: after sending the downlink data stream to the SeNB according to the received first slave cell deletion request message, sending the second slave to the SeNB a cell deletion request message, so that the SeNB releases the air interface resource allocated by the EPS-Bearer according to the evolved packet system migrated to the SCell.

It should be noted that the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be The physical unit, that is, can be located in one place, or can be distributed to multiple network units. Some or all of the modules can be selected according to actual needs. The purpose of the solution of this embodiment. In addition, in the drawings of the apparatus embodiments provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and specifically may be implemented as one or more communication buses or signal lines. Those of ordinary skill in the art can understand and implement without any creative effort.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus necessary general hardware, and of course, through dedicated hardware, including an application specific integrated circuit, a dedicated CPU, a dedicated memory, Special components and so on. In general, functions performed by computer programs can be easily implemented with the corresponding hardware. Moreover, the specific hardware structure used to implement the same function can be various, such as analog circuits, digital circuits, or dedicated circuits. Circuits, etc. However, for the purposes of the present invention, software program implementation is a better implementation in more cases. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer. , U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., including a number of instructions to make a computer device ( The method described in various embodiments of the present invention may be a personal computer, a server, or a network device.

In the above, the above embodiments are only used to explain the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the above embodiments, it will be understood by those skilled in the art that: The technical solutions described in the above embodiments are modified, or equivalent to some of the technical features are included; and the modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

44

+

Claims

Rights request

1. A method for implementing carrier aggregation CA, which is characterized by including:

According to the neighbor cell measurement report reported by the user equipment UE, the master station PeNB obtains the slave cell SCell. The SCell is a cell added by the PeNB for the UE to perform inter-base station CA between the PeNB and the slave station SeNB, where the The SeNB manages the SCell, the UE is attached to the primary cell PCell, the PCell is managed by the PeNB, and the PeNB and the SeNB are respectively connected to the unified control node SRC on the RAN side of the radio access network;

The PeNB sends a secondary cell add request message to the SeNB, so that the SeNB allocates corresponding air interface resources according to the evolved packet system bearer EPS-Bearer that is migrated to the SCell carried in the secondary cell add request message, where , the EPS-Bearer migrated to the SCell belongs to the EPS-Bearer established for the UE in the PCell;

The PeNB receives the secondary cell addition response message sent by the SeNB, and the secondary cell addition response message carries the air interface resource;

The PeNB sends a radio resource control protocol RRC reconfiguration message to the UE, and the RRC reconfiguration message carries the air interface resource, so that the UE establishes data between the UE and the SeNB based on the air interface resource. Wireless bearer DRB, the DRB corresponds to the EPS-Bearer migrated to the SCell;

The PeNB sends a secondary cell activation message to the SRC, so that the UE uses the PCell and the SCell to perform inter-base station CA.

2. The method according to claim 1, characterized in that: the migration to the SCell

EPS-Bearer, including:

The PeNB determines the EPS-Bearer that migrates to the SCell.

3. The method according to claim 1 or 2, characterized in that the PeNB sends a secondary cell add request message to the SeNB, so that the SeNB migrates to the secondary cell according to the information carried in the secondary cell add request message. The evolved packet system of SCell carries EPS-Bearer and allocates corresponding air interface resources, including:

The PeNB sends a secondary cell add request message to the SeNB via the SRC, so that the SeNB allocates corresponding air interface resources according to the EPS-Bearer migrated to the SCell carried in the secondary cell add request message, so The EPS-Bearer migrated to the SCell is determined by the PeNB or determined by the SRC; The PeNB receives the secondary cell add response message sent by the SeNB, including: the PeNB receives the secondary cell add response message sent by the SeNB via the SRC, and the secondary cell add response message carries the air interface resource.

4. The method according to any one of claims 1 to 3, characterized in that the slave cell addition request message further includes at least one of the following parameters: selection security algorithm, cell wireless network temporary identifier C-RNTI , system information, primary cell load information, user equipment capability information, Bearer Related Info, Security Key, Service Provider Description Identifier SPID.

5. The method according to any one of claims 1 to 4, characterized in that the air interface resources include: configuration parameters of L1 and L2 protocol stacks.

6. A method for implementing carrier aggregation CA, which is characterized by including:

The secondary station SeNB receives a secondary cell add request message. The secondary cell add request message carries an evolved packet system bearer EPS-Bearer that is migrated to the secondary cell SCell. The EPS-Bearer that migrates to the SCell belongs to the user equipment UE. The EPS-Bearer established by the primary cell PCell. The SCell is a cell added by the primary station PeNB for the UE to perform CA between the PeNB and SeNB base stations. The SCell is generated by the PeNB according to the neighbor cell measurement report reported by the UE. The acquired cell, wherein the SeNB manages the SCell, the PeNB manages the PCell, the UE is attached to the PCell, and the PeNB and the SeNB are respectively connected to the unified control node SRC on the RAN side of the radio access network ; The SeNB allocates corresponding air interface resources to the EPS-Bearer that migrates to the SCell; the SeNB establishes a data channel with the SRC, and the data channel corresponds to the EPS-Bearer that migrates to the SCell;

The SeNB sends a secondary cell add response message to the PeNB, and the secondary cell add response message carries the air interface resource, so that the PeNB sends a radio resource control protocol RRC reconfiguration message to the UE, and the RRC The reconfiguration message carries the air interface resource, so that the UE establishes a data radio bearer DRB between the UE and the SeNB according to the air interface resource, and the DRB and the EPS-Bearer migrated to the SCell Correspondingly, after the configuration is successful, the PeNB sends a secondary cell activation message to the SRC, so that the UE uses the PCell and the SCell to perform inter-base station CA.

7. The method according to claim 6, characterized in that the secondary station SeNB receives a secondary cell addition request message, including:

The SeNB receives the secondary cell addition request message sent by the PeNB; Or, the SeNB receives the secondary cell addition request message sent by the PeNB via the SRC.

8. The method according to claim 6 or 7, characterized in that the SeNB sends a secondary cell add response message to the PeNB, including:

The SeNB sends a secondary cell add response message to the PeNB via the SRC.

9. The method according to any one of claims 6 to 8, characterized in that the slave cell addition request message further includes at least one of the following parameters: selection security algorithm, cell wireless network temporary identifier C-RNTI , system information, primary cell load information, user equipment capability information, Bearer Related Info, Security Key, Service Provider Description Identifier SPID.

10. The method according to any one of claims 6 to 9, characterized in that the adding a response message from the cell further includes: the identity code of the data channel and the Internet Protocol IP address of the SRC.

11. The method according to any one of claims 6 to 10, characterized in that the air interface resources include: configuration parameters of L1 and L2 protocol stacks;

The data channel is a General Packet Radio Service GPRS Tunnel Protocol User Plane GTPU tunnel; the identity code of the data channel is a tunnel endpoint identifier TEID.

12. A method for implementing carrier aggregation CA, which is characterized by including:

The unified control node SRC establishes a data channel between the SRC and the slave station SeNB. The data channel corresponds to the evolved packet network bearer EPS-Bearer migrated to the SCell. The EPS-Bearer migrated to the SCell Belongs to the EPS-Bearer established for the user equipment UE in the primary cell PCell, wherein the SCell is managed by the SeNB, the PCell is managed by the primary station PeNB, the PeNB and the SeNB are respectively connected to the SRC, The UE is attached to the PCell; the SRC receives the secondary cell activation message sent by the PeNB, so that the SRC uses the PCell and the SCell to perform inter-base station CA for the UE.

13. The method according to claim 12, characterized in that, before the SRC establishes the data channel between the SRC and the slave station SeNB, it further includes:

The SRC determines the EPS-Bearer migrated to the SCell.

14. The method according to claim 12 or 13, characterized in that before the SRC establishes the data channel between the SRC and the slave station SeNB, it further includes:

The SRC forwards the secondary cell add request message sent by the PeNB to the SeNB; the SRC forwards the secondary cell add response message sent by the SeNB to the PeNB.

15. The method according to any one of claims 12 to 14, characterized in that the SRC establishes a data channel between the SRC and the SeNB, including:

The SRC establishes the data channel between the SRC and the SeNB under the trigger of the PeNB; or, the SRC establishes the data channel between the SRC and the SeNB under the trigger of the SeNB.

16. The method according to any one of claims 12 to 15, characterized in that,

The data channel is a General Packet Radio Service GPRS Tunnel Protocol User Plane GTPU tunnel, and the identity code of the data channel is a tunnel endpoint identifier TEID.

17. The method according to any one of claims 12 to 16, characterized in that, after the SRC receives the secondary cell activation message sent by the PeNB, the method further includes: the SRC transmits the activation message to the cell through the data channel. The downlink data stream is sent to the SeNB.

18. A method for implementing carrier aggregation CA, which is characterized by including:

According to the neighbor cell measurement report reported by the user equipment UE, the primary station PeNB determines to delete the secondary cell SCell. The SCell is the cell in which the UE uses the PeNB and the secondary station SeNB to perform inter-base station CA, wherein the SeNB manages the SCell, the UE is attached to the primary cell PCell, the PCell is managed by the PeNB, and the PeNB and the SeNB are respectively connected to the unified control node SRC;

The PeNB sends a first secondary cell deletion request message to the SRC, so that the SRC stops sending downlink data flows through the SeNB;

After receiving the first slave cell deletion response message sent by the SRC, the PeNB sends a radio resource control protocol RRC reconfiguration message to the UE, so that the UE stops using the SCell to send uplink data streams.

19. The method according to claim 18, characterized in that, after the PeNB sends the radio resource control protocol RRC reconfiguration message to the UE, it further includes:

The PeNB sends a second secondary cell deletion request message to the SeNB, so that the SeNB releases the air interface resources allocated according to the Evolved Packet System bearer EPS-Bearer migrated to the SCell.

20. The method according to claim 19, wherein the PeNB sends a second secondary cell deletion request message to the SeNB, including:

The PeNB sends a second secondary cell deletion request message to the SeNB via the SRC.

21. A method for implementing carrier aggregation CA, which is characterized by including:

The unified control node SRC on the radio access network RAN side receives the first secondary cell deletion request message sent by the master station PeNB, and the PeNB and the slave station SeNB are respectively connected to the SRC;

The SRC stops sending downlink data flow to the SeNB according to the received first secondary cell deletion request message.

22. The method according to claim 21, characterized in that, after the SRC stops sending the downlink data stream to the SeNB according to the received first secondary cell deletion request message, the method further includes:

The SRC sends a first secondary cell deletion response message to the PeNB.

23. The method according to claim 21 or 22, characterized in that, after the SRC stops sending the downlink data stream to the SeNB according to the received first secondary cell deletion request message, it further includes:

The SRC sends a second secondary cell deletion request message to the SeNB, so that the SeNB releases the air interface resources allocated according to the Evolved Packet System Bearer EPS-Bearer migrated to the SCell.

24. A master station PeNB, characterized by: including:

The acquisition unit is configured to acquire the secondary cell SCell according to the neighbor cell measurement report reported by the user equipment UE. The SCell is a cell added by the PeNB for the UE to perform inter-base station CA between the PeNB and the secondary station SeNB, where The SeNB manages the SCell, the UE is attached to the primary cell PCell, the PCell is managed by the PeNB, and the PeNB and the SeNB are respectively connected to the unified control node SRC on the RAN side of the radio access network;

The first sending unit is configured to send a secondary cell add request message to the SeNB, so that the SeNB allocates the corresponding Evolved Packet System bearer EPS-Bearer that is migrated to the SCell according to the secondary cell add request message carried in the secondary cell add request message. Air interface resources, wherein the EPS-Bearer migrated to SCell belongs to the EPS-Bearer established for the UE in the PCell;

A receiving unit, configured to receive a secondary cell addition response message sent by the SeNB, where the secondary cell addition response message carries the air interface resource;

The second sending unit is configured to send a radio resource control protocol RRC reconfiguration message to the UE, where the RRC reconfiguration message carries the air interface resource, so that the UE establishes a connection between the UE and the UE based on the air interface resource. The data radio bearer DRB of the SeNB, the DRB corresponds to the EPS-Bearer migrated to the SCell; The third sending unit is configured to send a secondary cell activation message to the SRC, so that the UE uses the PCell and the SCell to perform inter-base station CA.

25. The PeNB according to claim 24, characterized in that the PeNB further includes: a determining unit configured to determine the EPS-Bearer to migrate to the SCell.

26. PeNB according to claim 24 or 25, characterized in that,

The first sending unit is specifically configured to send a secondary cell add request message to the SeNB via the SRC, so that the SeNB migrates to the SCell according to the EPS-Bearer carried in the secondary cell add request message. Allocate corresponding air interface resources, and the EPS-Bearer migrated to the SCell is determined by the PeNB or the SRC;

The receiving unit is specifically configured to receive a secondary cell addition response message sent by the SeNB via the SRC, where the secondary cell addition response message carries the air interface resource.

27. A slave station SeNB, characterized by including:

A receiving unit, configured to receive a secondary cell add request message, where the secondary cell add request message carries an evolved packet system bearer EPS-Bearer that is migrated to the SCell, and the EPS-Bearer that is migrated to the SCell belongs to the user equipment. The EPS-Bearer established by the UE in the primary cell PCell. The SCell is a cell added by the primary station PeNB for the UE to perform CA between the PeNB and SeNB base stations. The SCell is measured by the PeNB according to the neighboring cells reported by the UE. The cell obtained by reporting, wherein the SeNB manages the SCell, the PeNB manages the PCell, the UE is attached to the PCell, and the PeNB and the SeNB are unified control nodes on the radio access network RAN side respectively. SRC connected;

An allocation unit, configured to allocate corresponding air interface resources to the EPS-Bearer that migrates to the SCell; a channel establishment unit, used to establish a data channel with the SRC based on the air interface resources, and the data channel is connected to the EPS-Bearer that migrates to the SCell. EPS-Bearer - corresponding;

A sending unit configured to send a slave cell add response message to the PeNB, where the slave cell add response message carries the air interface resource, so that the PeNB sends a radio resource control protocol RRC reconfiguration message to the UE, so The RRC reconfiguration message carries the air interface resource, so that the UE establishes a data radio bearer DRB between the UE and the SeNB based on the air interface resource, and the DRB and the EPS migrated to the SCell -Bearer correspondence, after the configuration is successful, the PeNB sends a secondary cell activation message to the SRC, so that the UE uses the PCell and the SCell to perform inter-base station CA.

28. The SeNB according to claim 27, wherein the receiving unit is specifically configured to receive a request message for adding a secondary cell sent by the PeNB; or, receive a request message for adding a secondary cell sent by the PeNB via the SRC. .

29. The SeNB according to claim 27 or 28, wherein the sending unit is specifically configured to send a secondary cell addition response message to the PeNB via the SRC.

30. A unified control node SRC, characterized by including:

A channel establishment unit, configured to establish a data channel between the SRC and the slave station SeNB. The data channel corresponds to the evolved packet network bearer EPS-Bearer that is migrated to the SCell. The EPS that is migrated to the SCell -Bearer belongs to the EPS-Bearer established for the user equipment UE in the primary cell PCell, wherein the SCell is managed by the SeNB, the PCell is managed by the primary station PeNB, and the PeNB and the SeNB are respectively connected to the SRC, The UE is attached to the PCell; a first receiving unit is configured to receive the secondary cell activation message sent by the PeNB, and use the PCell and the SCell to perform inter-base station CA for the UE.

31. The SRC according to claim 30, characterized in that the SRC further includes: a determining unit used to determine the EPS-Bearer to be migrated to the SCell.

32. The SRC according to claim 30 or 31, characterized in that the SRC further includes:

The first sending unit is configured to forward the secondary cell addition request message sent by the PeNB to the SeNB; and forward the secondary cell addition response message sent by the SeNB to the PeNB.

33. The SRC according to any one of claims 30 to 32, characterized in that the channel establishment unit is specifically configured to establish a data channel between the SRC and SeNB under the trigger of the PeNB; or , establishing a data channel between the SRC and SeNB under the trigger of the SeNB.

34. The SRC according to any one of claims 30 to 33, characterized in that the SRC further includes:

The second receiving unit is used to receive the downlink data stream sent by the serving gateway SGW/public data network gateway PGW;

The second sending unit is configured to send the downlink data stream to the SeNB through the data channel.

35. A master station PeNB, characterized by including: The acquisition unit is configured to determine to delete the SCell from the cell based on the neighbor cell measurement report reported by the user equipment UE. The SCell is a cell in which the UE uses the PeNB and the slave station SeNB to perform inter-base station CA, wherein the SeNB manages The SCell and the UE are attached to the primary cell PCell, the PCell is managed by the PeNB, and the PeNB and the SeNB are respectively connected to the unified control node SRC;

The first sending unit is configured to send a first secondary cell deletion request message to the SRC, so that the SRC stops sending downlink data streams to the SeNB;

The receiving unit is configured to receive the first deletion response message from the cell sent by the SRC; the second sending unit is used to send the wireless deletion response message to the UE after the receiving unit receives the first deletion response message from the cell sent by the SRC. Resource Control Protocol RRC reconfiguration message, so that the UE stops using the SCell to send uplink data streams.

36. The PeNB according to claim 35, characterized in that, the PeNB further includes: a third sending unit, configured to send a second secondary cell deletion request message to the SeNB, so that the SeNB releases the The evolved packet system to the SCell carries the air interface resources allocated by the EPS-Bearer.

37. The PeNB according to claim 36, characterized in that the third sending unit is specifically configured to send a second secondary cell deletion request message to the SeNB via the SRC.

38. A radio access network side unified control node SRC, characterized in that it includes: a receiving unit, configured to receive the first secondary cell deletion request message sent by the master station PeNB, the PeNB and the slave station SeNB are respectively connected to the SRC connected;

A data flow control unit configured to stop sending downlink data flow to the SeNB according to the received first secondary cell deletion request message.

39. The SRC according to claim 38, characterized in that, the SRC further includes: a first sending unit, configured for the data flow control unit to stop sending data to the cell according to the received first deletion request message from the cell. After the SeNB sends the downlink data stream, it sends a first secondary cell deletion response message to the PeNB.

40. The SRC according to claim 38 or 39, characterized in that the SRC further includes:

The second sending unit is configured to send a second slave data flow to the SeNB after the data flow control unit stops sending the downlink data flow to the SeNB according to the received first slave cell deletion request message. The cell deletion request message is used to cause the SeNB to release the air interface resources allocated according to the Evolved Packet System bearer EPS-Bearer migrated to the SCell.

41. A carrier aggregation CA implementation system, characterized in that the system includes: the primary station PeNB as described in any one of claims 24 to 26; the primary station PeNB as described in any one of claims 27 to 29 From the station SeNB, the radio access network side unified control node SRC according to any one of claims 30 to 34, wherein the PeNB and the SeNB are respectively connected to the SRC; or,

The master station PeNB according to any one of claims 35 to 37, the unified control node SRC and the slave station SeNB according to any one of claims 38 to 40, wherein the PeNB and the SeNB are respectively with The SRC is connected, and the SeNB is configured to receive the second secondary cell deletion request message sent by the PeNB or the SeNB; release the air interface resources allocated according to the Evolved Packet System bearer EPS-Bearer migrated to the SCell.