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WO2015100590A1 - Procédé de transmission de données, équipement utilisateur et enb - Google Patents

Procédé de transmission de données, équipement utilisateur et enb Download PDF

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Publication number
WO2015100590A1
WO2015100590A1 PCT/CN2013/091050 CN2013091050W WO2015100590A1 WO 2015100590 A1 WO2015100590 A1 WO 2015100590A1 CN 2013091050 W CN2013091050 W CN 2013091050W WO 2015100590 A1 WO2015100590 A1 WO 2015100590A1
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WO
WIPO (PCT)
Prior art keywords
drb
bearer
eps
penb
data stream
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/CN2013/091050
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English (en)
Chinese (zh)
Inventor
黄敏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201380003258.0A priority Critical patent/CN103875275A/zh
Priority to PCT/CN2013/091050 priority patent/WO2015100590A1/fr
Publication of WO2015100590A1 publication Critical patent/WO2015100590A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H04W28/082—Load balancing or load distribution among bearers or channels

Definitions

  • the embodiments of the present invention relate to the field of communications, and in particular, to a data transmission method, a user equipment, and a base station. Background technique
  • Carrier Aggregation (CA) technology is a user equipment (UE) that simultaneously sends and receives data from different cells (Cell).
  • the hetero-site CA (Inter-eNB CA) refers to two Cell points used for CA. It belongs to different evolved base stations (evolved NodeBs, eNBs). Different-site CA technology can bring higher throughput to users, improve user experience, and improve network resource utilization. Based on the above advantages, hetero-site CA technology has become a hot topic in current research.
  • the traffic is usually split at the Internet Protocol (IP) layer, and the complete L1 and L2 protocol stacks are available in the primary eNB (PeNB) and the secondary eNB (SeNB). This means that each of the primary base station and the secondary base station needs to establish a respective Data Radio Bearer (DRB).
  • IP Internet Protocol
  • PeNB primary eNB
  • SeNB secondary eNB
  • DRB Data Radio Bearer
  • the implementation of the current carrier aggregation scheme for example, the 3rd Generation Partnership Project (3GPP)
  • 3GPP 3rd Generation Partnership Project
  • the English translation of the evolved packet network bearer is Evolved Packet System-Bearer, and the cartridge is written as EPS-Bearer.
  • EPS-Bearer can also be called as an evolved packet system bearer.
  • EPS-Bearer can also be called as an evolved packet system bearer.
  • the data traffic on one of the EPS-Bearers is 4, the data flow with large traffic flows to the data traffic through the correspondence between the EPS-Bearer and the DRB.
  • the EPS-Bearer corresponds to the base station to which the DRB points, so that the load of the base station pointed to by the DRB is heavy, causing congestion of the base station. Summary of the invention
  • the embodiments of the present invention provide a data transmission method and a user equipment, which are used to solve the problem of base station congestion caused by overweight load of a base station existing in the prior art.
  • an embodiment of the present invention provides a data transmission method, including: The user equipment UE receives the secondary configuration information sent by the primary base station PeNB, where the secondary configuration information includes information about the second data radio bearer DRB allocated by the secondary base station SeNB to the UE in the secondary cell SCell, where the SeNB manages the SCell,
  • the SCell is a secondary cell of the UE;
  • the UE is bound to the first evolved packet network bearer EPS-Bearer and the second DRB, where the first EPS-Bearer is bound to the first DRB before being bound to the second DRB,
  • the first DRB is a data radio bearer allocated by the PeNB to the UE in the primary cell PCell, the PeNB manages the PCell, and the PCell is a primary cell of the UE;
  • the UE transmits a data stream using a second DRB bound to the first EPS-Bearer.
  • the method before the UE binds the first EPS-Bearer and the second DRB, the method further includes:
  • the UE binds the first EPS-Bearer to the first DRB.
  • the receiving, by the UE, the secondary configuration information that is sent by the PeNB includes:
  • Radio resource control protocol RRC reconfiguration message sent by the PeNB, where the RRC reconfiguration message carries a radio bearer identifier RB ID of the second DRB and an identifier ID of the first EPS-Bearer, where the RRC reconfiguration
  • the message also carries a fully configured Full Config parameter, where the Full Config parameter is used to indicate that the UE binds the first EPS-Bearer and the second DRB;
  • Binding by the UE, the first EPS-Bearer and the second DRB, specifically:
  • the UE After obtaining the Full Config parameter in the RRC reconfiguration message, the UE establishes a mapping relationship between the ID of the first EPS-Bearer and the RB ID of the second DRB in the non-access NAS layer.
  • the UE is used to be bound to the first EPS-Bearer
  • the second DRB transmits the data stream, including:
  • the UE When the SeNB sends the first downlink data stream by using the second DRB, the UE receives the first downlink data stream sent by the SeNB by using the second DRB;
  • the method further includes:
  • the UE When the UE receives the first downlink data stream sent by the SeNB by using the second DRB, If the PeNB sends the second downlink data stream by using the third DRB, the UE receives the second downlink data stream sent by the PeNB by using the third DRB, and the third DRB is bound to the second EPS-Bearer.
  • the third DRB is a data radio bearer allocated by the PeNB to the UE in the PCell, where the first downlink data stream and the second downlink data stream are a unified control node SRC to the slave service gateway SGW.
  • the received data stream is obtained by offloading, or the first downlink data stream and the second downlink data stream are obtained by the PeNB to offload the data stream received from the SGW.
  • the data stream is an uplink data stream that the UE needs to send And the using, by the UE, the second DRB to transmit the data stream that is bound to the first EPS-Bearer, including: determining, by the first EPS-Bearer, the second binding with the first EPS-Bearer DRB;
  • the second The DRB is established by the SeNB for the UE in the SCell, and the information of the second DRB is acquired by the PeNB from the SeNB and carried in the secondary configuration information and sent to the UE.
  • the first EPS-Bearer is a default evolved packet network bearer Default EPS-Bearer, or the dedicated evolved packet network bearer Dedicated EPS-Bearer.
  • the first EPS-Bearer is an Assisting Evolved Packet Network bearer Assisting EPS-Bearer;
  • the Assisting EPS-Bearer is triggered by the mobility management entity MME, or triggered by the PGW in the core network, or triggered by the UE to establish the EPS-Bearer.
  • an embodiment of the present invention provides a data transmission method, including:
  • the primary base station PeNB acquires information of the second data radio bearer DRB allocated by the secondary base station SeNB for the user equipment UE in the secondary cell SCell, where the SeNB manages the SCell, and the SCell is a secondary cell of the UE;
  • the PeNB sends the secondary configuration information to the UE, where the secondary configuration information includes information about the second DRB;
  • the second DRB is configured to be bound to the first evolved packet network bearer EPS-Bearer, and used to transmit a data stream between the UE and the SeNB.
  • the primary base station PeNB acquires information about the second data radio bearer DRB allocated by the secondary base station SeNB for the user equipment UE in the secondary cell SCell.
  • the PeNB allocates a first DRB to the UE in the primary cell PCell, the PeNB manages the PCell, and the PCell is a primary cell of the UE;
  • the PeNB sends the primary configuration information to the UE, where the primary configuration information includes: information about the first DRB;
  • the first DRB is configured to be bound to the first EPS-Bearer, and used to transmit a data stream between the UE and the PeNB.
  • the auxiliary configuration information is used to indicate that the UE cancels the first EPS-Bearer Binding with the first DRB, and binding the first EPS-Bearer and the second DRB.
  • the information about the second data radio bearer (DRB) allocated by the SeNB to the user equipment UE in the secondary cell SCell is obtained by the primary base station, and the information includes:
  • the PeNB receives the information of the second DRB that is sent by the unified control node SRC, and the information of the second DRB is sent by the SeNB to the SRC.
  • the information of the second DRB is a radio bearer identifier RB ID of the second DRB;
  • the secondary configuration information is a radio resource control protocol RRC reconfiguration message;
  • the sending, by the PeNB, the secondary configuration information to the UE includes:
  • the RRC reconfiguration message Sending, by the PeNB, the RRC reconfiguration message, where the RRC reconfiguration message carries a second The RB ID of the DRB and the identifier ID of the first EPS-Bearer, the RRC reconfiguration message further carries a fully configured Full Config parameter, where the Full Config parameter is used to indicate that the UE binds the first EPS-Bearer and the second DRB .
  • the PeNB is After the UE sends the secondary configuration information, the method further includes:
  • the PeNB offloads the data stream into a first downlink data stream and a second downlink data stream; the PeNB sends the first downlink data stream to the UE by using the SeNB, where the SeNB Transmitting the bearer of the first downlink data stream with the UE as the second DRB; the PeNB sending the second downlink data stream to the UE by using a third DRB, where the third DRB is The data radio bearer allocated by the PeNB to the UE in the PCell.
  • the embodiment of the present invention further provides a user equipment, including: a first unit, a second unit, and a third unit, where
  • the first unit is configured to receive the secondary configuration information sent by the primary base station PeNB, where the secondary configuration information includes information about the second data radio bearer DRB allocated by the secondary base station SeNB to the UE in the secondary cell SCell, where the SeNB manages the SCell, the SCell is a secondary cell of the UE;
  • the second unit is configured to bind the first evolved packet network bearer EPS-Bearer and the second DRB, where the first EPS-Bearer is bound to the first DRB before being bound to the second DRB,
  • the first DRB is a data radio bearer allocated by the PeNB to the UE in the primary cell PCell, the PeNB manages the PCell, and the PCell is a primary cell of the UE;
  • the third unit is configured to transmit the data stream using the second DRB bound to the first EPS-Bearer.
  • the embodiment of the present invention further provides a base station, where the base station is a primary base station PeNB, and includes: a first unit and a second unit, where
  • the first unit is configured to acquire information about a second data radio bearer DRB allocated by the SeNB in the secondary cell SCell to the user equipment UE, where the SeNB manages the SCell, and the SCell is a secondary cell of the UE;
  • the second unit is configured to send the secondary configuration information to the UE, where the secondary configuration information includes information about the second DRB;
  • the second DRB is used by the UE to bind the first evolved packet network bearer.
  • the EPS-Bearer and the second DRB are configured to transmit a data stream according to the second DRB and the SeNB.
  • the UE first receives the secondary configuration information sent by the PeNB, where the secondary configuration information includes the second DRB allocated by the SeNB to the UE in the secondary cell, and then the UE binds the first EPS-Bearer and the second DRB.
  • the first EPS-Bearer is bound to the first DRB before being bound to the second DRB.
  • the UE transmits data by using the second DRB bound to the first EPS-Bearer. flow.
  • the first EPS-Bearer is bound to the second DRB, and the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, because the second DRB is the data radio bearer allocated by the SeNB to the UE in the SCell. Therefore, in the embodiment of the present invention, the first EPS-Bearer still establishes a corresponding relationship with the DRB, but corresponding to different time segments, the first EPS-Bearer may be bound to a different DRB, for example, the UE is receiving.
  • the first EPS-Bearer is bound to the first DRB before the secondary configuration information, but after the secondary configuration information is received, the first EPS-Bearer is bound to the second DRB, and the UE is visible after receiving the secondary configuration information in the embodiment of the present invention.
  • the first EPS-Bearer may be re-bound, so that the binding of the first EPS-Bearer and the first DRB may be changed to the binding of the first EPS-Bearer and the second DRB, and the binding relationship may be changed.
  • the data stream is transmitted. Since the UE can bind the first EPS-Bearer and different DRBs in different time periods, it can flexibly select which DRB to use to transmit data streams, satisfy load balancing between different sites, and improve user throughput. Rate and resource utilization. DRAWINGS
  • FIG. 1 is a schematic block diagram of a data transmission method according to an embodiment of the present invention
  • FIG. 2 is a schematic block diagram of another data transmission method according to an embodiment of the present invention
  • FIG. 4 is a schematic block diagram of another data transmission method according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of an application scenario in a data transmission method according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a component of a UE according to an embodiment of the present disclosure
  • FIG. 7 is a schematic structural diagram of a PeNB according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of another PeNB according to an embodiment of the present disclosure
  • FIG. 7 is a schematic structural diagram of another PeNB according to an embodiment of the present invention
  • FIG. 8 is a schematic structural diagram of another UE according to an embodiment of the present disclosure
  • FIG. 9 is a schematic structural diagram of another PeNB according to an embodiment of the present disclosure. detailed description
  • the embodiments of the present invention provide a data transmission method and a user equipment, which are used to solve the problem of base station congestion caused by overweight load of a base station existing in the prior art.
  • An embodiment of the data transmission method of the present invention is applicable to carrier aggregation (CA) of a user equipment (UE), where the method may include: receiving, by the UE, a primary base station (Primary eNB, PeNB) The secondary configuration information, where the secondary configuration information includes information of a second data radio bearer (DRB) allocated by the secondary eNB (Secondary eNB, SeNB) for the UE in the secondary cell (SCell), and the SeNB manages
  • DRB second data radio bearer allocated by the secondary eNB
  • SeNB secondary cell
  • the SCell is a secondary cell of the UE; the UE is bound to the first Evolved Packet System-Bearer (EPS-Bearer) and the second DRB, where the first EPS-Bearer is bound to the second DRB.
  • EPS-Bearer Evolved Packet System-Bearer
  • the first DRB is a data radio bearer allocated by the PeNB for the UE in the primary cell (PCell), the PeNB manages the PCell, and the PCell is the primary cell of the UE; the UE is tied to the first EPS-Bearer
  • the determined second DRB transmits the data stream.
  • another embodiment of the data transmission method of the present invention may include: 101.
  • a UE receives secondary configuration information sent by a PeNB.
  • the secondary configuration information includes information about the second DRB allocated by the SeNB to the UE in the SCell.
  • the UE is attached to the PCell of the PeNB, and a communication connection is established between the UE and the PeNB.
  • the SeNB is the UE in the SCell.
  • the DRB allocated by the SeNB to the UE is referred to as a “second data radio bearer”.
  • the information of the second data radio bearer may be acquired by the PeNB, and the PeNB sends the information of the second data radio bearer to the UE in the manner of the secondary configuration information. In the subsequent embodiments, for convenience of description, it may also be referred to as "second DRB".
  • the SeNB allocates a radio bearer identity (RB ID) to the second DRB allocated to the UE in the SCell, and configures all the parameters of the LI and L2 protocol stacks of the second DRB.
  • RB ID radio bearer identity
  • the PeNB sends the secondary configuration information to the UE, which is used to indicate that the UE is bound to the EPS-Bearer and the DRB, and the PD is bound to the DRB by using the secondary configuration information that is sent by the PeNB.
  • the PeNB indicates that the UE sets the EPS-Bearer and the second DRB as an example. If only one EPS-Bearer exists, the secondary configuration information sent by the PeNB to the UE may not carry the EPS-Bearer indicating whether the UE will use the second DRB. Binding, of course, the PeNB may also indicate which EPS-Bearer is bound by the UE to the second DRB by using the sent secondary configuration information.
  • the PeNB may send the secondary configuration information to the UE in multiple manners, for example, may be sent by the PeNB through a Radio Resource Control (RRC) reconfiguration message sent by the UE, and carried in the RRC reconfiguration message. All configuration parameters of the second DRB and the RB ID.
  • RRC reconfiguration message may also carry an EPS-Bearer to be bound. Specifically, the EPS-Bearer identifier (Identity, ID) may be used.
  • the UE binds the first EPS-Bearer and the second DRB.
  • the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, and the first DRB is a data radio bearer allocated by the PeNB for the UE in the PCell, the PeNB manages the PCell, and the PCell is the primary cell of the UE. .
  • the PeNB when the PeNB determines to add the SCell to the UE and acquires the second DRB allocated by the SeNB to the UE in the SCell, the PeNB sends the secondary configuration information to the UE, and the UE may obtain the The second DRB allocated by the SeNB to the UE in the SCell, and the first EPS-Bearer and the acquired second DRB are bound according to the indication of the PeNB, and the secondary configuration information sent by the PeNB further carries the EPS-Bearer ID.
  • the EPS-Bearer and the second DRB corresponding to the EPS-Bearer ID need to be bound.
  • the first EPS-Bearer that needs to be re-bound is taken as an example for description.
  • the first EPS-Bearer is bound to the first DRB before the first EPS-Bearer is bound to the second DRB, according to the explicit provisions in the 3GPP: EPS-Bearer and DRB are corresponding. of. That is to say, in the embodiment of the present invention, the first EPS-Bearer performs "rebinding" in the step 102, or is called “secondary binding". In the embodiment of the present invention, the first EPS is changed.
  • the mapping relationship between the Bearer and the first DRB that is, the existing binding between the first EPS-Bearer and the first DRB is released, but the first EPS-Bearer and the second DRB are bound, that is, the UE establishes the first A mapping relationship between an EPS-Bearer and a second DRB.
  • the first EPS-Bearer still establishes a corresponding relationship with the DRB, but corresponding to different time segments, the first EPS-Bearer may be bound to different DRBs, for example, the UE receives the auxiliary The first EPS-Bearer is bound to the first DRB before the configuration information, but the first EPS-Bearer is bound to the second DRB after receiving the secondary configuration information.
  • the EPS-Bearer and the DRB are correspondingly-corresponding, and there is a certain and unique binding relationship between the EPS-Bearer and the DRB, and the traffic flow with a large traffic volume flows to the DRB.
  • the base station When the base station is pointed to, the base station corresponding to the DRB with large data traffic is relatively congested. Therefore, the prior art cannot perform flexible traffic distribution management for each base station, and load balancing between different sites cannot be achieved, and the user throughput rate is low.
  • the first EPS-Bearer has been associated with a certain DRB (for example, DRB1), before the PeNB sends the secondary configuration information to the UE (the secondary configuration information includes the information that the SeNB allocates the DRB2 to the UE in the SCell).
  • the UE may change the binding relationship between the first EPS-Bearer and the DRB1, that is, the UE releases the binding of the first EPS-Bearer and the DRB1, and the binding is performed.
  • the first EPS-Bearer and the DRB2 are changed, so that the mapping relationship between the first EPS-Bearer and the DRB1 is changed, and the mapping relationship between the first EPS-Bearer and the DRB2 is re-established, and the data flow can follow the newly established mapping relationship.
  • Forwarding data thereby changing the base station transmission data stream corresponding to the original DRB1 to the data stream transmitted by the base station corresponding to the DRB2, thereby improving the flexibility of data stream offloading, satisfying load balancing between different stations, and improving user throughput. Rate and resource utilization.
  • step 102 UE binds the first Before the EPS-Bearer and the second DRB, the following steps may also be included:
  • the UE receives the primary configuration information sent by the PeNB, where the primary configuration information includes the information of the first DRB;
  • the UE binds the first EPS-Bearer to the first DRB.
  • the UE After receiving the primary configuration message sent by the PeNB, the UE extracts the information of the first DRB from the primary configuration message, and then the UE binds the first EPS-Bearer and the first DRB, thus implementing the first EPS- The initial binding of Bearer to the first DRB. It can be seen that if the PeNB allocates the first DRB to the UE in the PCell, and the UE establishes a binding relationship between the first EPS-Bearer and the first DRB, but by step 102, the UE may release the first EPS-Bearer and the first Binding of a DRB, and binding the first EPS-Bearer and the second DRB.
  • the binding of the first EPS-Bearer and the second DRB is a re-established binding, because the UE establishes an initial binding between the first EPS-Bearer and the first DRB allocated to it in the PCell, and rebinds
  • the binding between the first EPS-Bearer and the second DRB is established, and the remapping of the binding relationship can change the flow of data, improve the flexibility of data stream transmission, and satisfy load balancing between different sites. .
  • the UE binds the first EPS-Bearer and the second DRB in step 102, and if the first EPS-Bearer is bound to other DRBs before performing the step, the step 102 is Execution will inevitably cause the binding between the first EPS-Bearer and other DRBs to be released, because according to the current 3GPP regulations, EPS-Bearer and DRB are still - corresponding, different from the prior art, this In the embodiment of the invention, the first EPS-Bearer and the plurality of DRBs are still corresponding to each time period.
  • first EPS-Bearer and “second EPS-Bearer” may be adopted to distinguish that two different evolved packet network bearers ( EPS-Bearer), in the embodiment of the present invention, for convenience of description, the first evolved packet network bearer may be referred to as a "first EPS-Bearer", and a “second evolved packet network bearer” may be referred to as "a second evolved packet network bearer” cartridge.
  • the second EPS-Bearer The second EPS-Bearer”.
  • the first EPS-Bearer in order to explain that the first EPS-Bearer has established a mapping relationship with a certain DRB before being re-bound with the second DRB, it will be the first and the first before step 102.
  • the DRB bound by the DRB is called a "first DRB" to distinguish it from the second DRB allocated by the SeNB to the UE in the SCell.
  • the first EPS-Bearer can be Default EPS-Bearer, or Dedicated EPS-Bearer.
  • the first EPS-Bearer can be Default EPS-Bearer, or Dedicated EPS-Bearer.
  • an EPS-Bearer needs to be established. For example, only one EPS-Bearer is established in the UE, assuming that the EPS-Bearer established in the UE is the second EPS-Bearer, and the second EPS The Bearer is bound to the third DRB.
  • the third DRB is the data radio bearer allocated by the PeNB to the UE in the PCell.
  • the UE needs to re-establish an EPS-Bearer.
  • the re-established EPS-Bearer is defined in the embodiment of the present invention.
  • the first EPS-Bearer may specifically be an Assisting EPS-Bearer.
  • the Assisting EPS-Bearer can be established in the following three ways:
  • Assisting EPS-Bearer is triggered by the Mobility Management Entity (MME), or triggered by the PGW in the core network, or triggered by the UE.
  • MME Mobility Management Entity
  • step 102 UE binds the first
  • the method may further include: triggering establishment of the first EPS-Bearer when there is service data to be transmitted. That is to say, the first EPS-Bearer can be triggered by the UE to establish an EPS-Bearer when there is service data transmission.
  • the step 101 the UE receives the secondary configuration information sent by the PeNB, and specifically includes:
  • the UE receives the RRC reconfiguration message sent by the PeNB, where the RRC reconfiguration message carries the RB ID of the second DRB and the ID of the first EPS-Bearer, and the RRC reconfiguration message also carries the Full Config parameter, Full
  • the Config parameter is used to indicate that the UE is bound to the first EPS-Bearer and the second DRB, and the specific PeNB may set the value of the Full Config parameter to true (True).
  • the UE may pass the Full.
  • the value of the Config parameter is True. It is known that the first EPS-Bearer and the second DRB need to be bound.
  • the step 102, the UE binding the first EPS-Bearer and the second DRB may include: after the UE obtains the Full Config parameter in the RRC reconfiguration message, the non-access stratum (NAS) A mapping relationship between the ID of the first EPS-Bearer and the RB ID of the second DRB is established in the layer.
  • NAS non-access stratum
  • Full Config If the value of Full Config is True, the UE needs to re-configure the parameters. When the value of Full Config is False, it means to modify some parameter configurations.
  • the UE can re-bind the first EPS-Bearer and the second DRB to achieve the purpose of using the SeNB to share the data flow in the PeNB, thereby implementing dynamic adjustment of the data flow.
  • the UE transmits a data stream by using a second DRB that is bound to the first EPS-Bearer.
  • the second DRB may be used to transmit the data stream, because the second DRB is a data radio bearer allocated by the SeNB for the UE in the SCell. Therefore, in the step 103, the UE uses the second DRB to transmit the data stream, which means that the SeNB can be used to transmit the data stream, so that the SeNB can share the data traffic in the PeNB, thereby implementing flexible management of data offloading.
  • step 103 UE is used with the first
  • the second DRB transmission data stream bound by the EPS-Bearer includes:
  • the UE When the SeNB sends the first downlink data stream by using the second DRB, the UE receives the first downlink data stream sent by the SeNB by using the second DRB.
  • the UE receives the first downlink data stream sent by the SeNB by using the second DRB
  • the PeNB sends the second downlink data stream by using the third DRB
  • the UE receives the second downlink data stream sent by the PeNB by using the third DRB, and the third DRB.
  • the third DRB is a data radio bearer allocated by the PeNB for the UE in the PCell;
  • the first downlink data stream and the second downlink data stream are obtained by using a single RAN controller (SRC) to offload the data stream received from the Serving GateWay (SGW), or the first downlink data.
  • the stream and the second downlink data stream are obtained by the PeNB offloading the data stream received from the SGW.
  • two EPS-Bearers are established in the UE, namely a first EPS-Bearer and a second EPS-Bearer, wherein the second EPS-Bearer is bound to the third DRB, and the first EPS-Bearer Bind to the second DRB.
  • the first downlink data stream and the second downlink data stream may be obtained by the SRC to offload the data stream received from the SGW, that is, the SRC is used as a split point, and the SRC is configured to receive the data stream from the SGW, and offload the received data stream, and Sending, by the PeNB and the SeNB, the received data stream is separately distributed.
  • the SRC receives the data stream from the SGW and divides the traffic into the first downlink data stream and the second downlink data stream. And transmitting the first downlink data stream to the SeNB, and transmitting the second downlink data stream to the PeNB, so that the UE can receive the first downlink data stream from the SeNB through the second DRB, and receive the first downlink data stream from the PeNB by using the third DRB. Second Row data stream.
  • the first downlink data stream and the second downlink data stream may be obtained by the PeNB to offload the data stream received from the SGW, that is, the PeNB is used as a split point, and when the SGW sends the data stream, the PeNB receives the data stream from the SGW and The first downlink data stream and the second downlink data stream are offloaded, and the first downlink data stream is sent to the SeNB, so the UE can receive the first downlink data stream from the SeNB through the second DRB, and pass the third DRB from the third DRB.
  • the PeNB receives the second downlink data stream.
  • the SRC is taken as a split point as an example, if the split point (SRC) receives the data flow from the SGW.
  • the splitting point may divide the data stream received from the SGW into the first downlink data stream and the second downlink data stream, and then the SRC distributes the first downlink data stream to the SeNB, and distributes the second downlink data stream to the PeNB.
  • the second EPS-Bearer is bound to the third DRB, so the UE can receive the second downlink data stream by using the third DRB. Because the first EPS-Bearer is bound to the second DRB, the UE can receive the second DRB. To the first downstream data stream.
  • the data flow described in step 103 is an uplink data flow that the UE needs to send, and the step 103 uses the second DRB that is bound to the first EPS-Bearer to transmit the data flow.
  • the UE determines the second DRB that is bound to the first EPS-Bearer by using the first EPS-Bearer; the UE sends the uplink data stream that needs to be sent to the SeNB through the second DRB, and the SeNB sends the uplink data stream that needs to be sent to the SRC or SGW.
  • the second DRB that is bound to the first EPS-Bearer may be sent to the SeNB.
  • the first EPS-Bearer is mapped to the second DRB, and the uplink data stream to be transmitted can be forwarded to the SeNB according to the newly established mapping relationship, and sent by the SeNB to the SRC or Specifically, if the SRC is used as the offloading point, the UE may send the uplink data stream to the SeNB through the second DRB, and the SeNB may send the uplink data stream to the SRC.
  • the SeNB may also receive the uplink data stream sent by the UE through the second DRB.
  • the SRC can be set according to the application scenario. It is only explained here. If the mapping relationship between the first EPS-Bearer and the first DRB is fixed according to the prior art, the uplink data stream to be transmitted can only follow the original mapping relationship (the first EPS-Bearer and the first DRB). The mapping relationship is forwarded to the PeNB, and is sent by the PeNB to the SRC or the SGW. If the traffic of the uplink data stream is large, the method of using the PeNB to send the uplink data stream may cause the network load of the PeNB to be relatively large.
  • the first EPS-Bearer and the second DRB are bound to change the flow direction of the uplink data stream, and the uplink data stream can be forwarded by the SeNB, thereby improving the flexibility of data stream offloading, meeting load balancing between different sites, and improving User throughput and resource utilization.
  • the UE first receives the secondary configuration information sent by the PeNB, where the secondary configuration information includes the second DRB allocated by the SeNB for the UE in the SCell, and then the UE binds the first EPS-Bearer and the second DRB. And the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, and after binding the first EPS-Bearer and the second DRB, the UE uses the second DRB transmission bound to the first EPS-Bearer. data flow.
  • the first EPS-Bearer is bound to the second DRB, and the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, because the second DRB is the data radio bearer allocated by the SeNB to the UE in the SCell. Therefore, in the embodiment of the present invention, the first EPS-Bearer still establishes a corresponding relationship with the DRB, but corresponding to different time segments, the first EPS-Bearer may be bound to a different DRB, for example, the UE is receiving.
  • the first EPS-Bearer is bound to the first DRB before the secondary configuration information, but after the secondary configuration information is received, the first EPS-Bearer is bound to the second DRB, and the UE is visible after receiving the secondary configuration information in the embodiment of the present invention.
  • the first EPS-Bearer may be re-bound, so that the binding of the first EPS-Bearer and the first DRB may be changed to the binding of the first EPS-Bearer and the second DRB, and the binding relationship may be changed.
  • the data stream is transmitted. Since the UE can bind the first EPS-Bearer and different DRBs in different time periods, it can flexibly select which DRB to use to transmit data streams, satisfy load balancing between different sites, and improve user throughput. Rate and resource utilization.
  • the above embodiment describes the data transmission method from the UE side.
  • the data transmission method is described in detail from the PeNB side. Referring to the method shown in FIG. 2, the method may include the following steps:
  • the PeNB acquires information about the second DRB allocated by the SeNB to the UE in the SCell.
  • the SeNB manages the SCell, and the SCell is a secondary cell of the UE.
  • the UE is attached to the PCell of the PeNB, and a communication connection is established between the UE and the PeNB.
  • the SeNB allocates a second DRB to the UE in the SCell, and the SeNB is the UE. After the second DRB is allocated, the PeNB may acquire the second DRB.
  • step 201 the PeNB acquires the SeNB.
  • the following steps may be further included:
  • the PeNB allocates a first DRB to the UE in the PCell, where the PeNB manages the PCell, and the PCell is the primary cell of the UE;
  • the PeNB sends the primary configuration information to the UE, where the primary configuration information includes: information of the first DRB, where the first DRB is used for binding with the first EPS-Bearer, and is used for transmitting data streams between the UE and the PeNB.
  • the UE binds the first EPS-Bearer and the first DRB, and the first DRB is a data radio bearer allocated by the PeNB to the UE in the PCell, so the UE may A data stream is transmitted between the first DRB and the PeNB.
  • the step 201PeNB acquires the information about the second DRB allocated by the SeNB to the UE in the SCell, and may include the following information: the PeNB receives the information of the second DRB sent by the SeNB; or, the PeNB receives the information sent by the SRC. Information of the second DRB, where the information of the second DRB is sent by the SeNB to the SRC.
  • the SeNB sends the information to the PeNB through the communication connection between the SeNB and the PeNB.
  • the SRC establishes a communication connection with the PeNB and the SeNB respectively, and after the SeNB allocates the information of the second DRB to the UE, the SeNB passes the SeNB.
  • the communication connection with the SRC is sent to the SRC, and then sent by the SRC to the PeNB through the communication connection between the SRC and the PeNB.
  • the PeNB sends the secondary configuration information to the UE.
  • the secondary configuration information includes the information of the second DRB, and the second DRB is used for binding with the first EPS-Bearer, and is used for transmitting the data flow between the UE and the SeNB.
  • the PeNB after the PeNB acquires the information of the second DRB from the SeNB, the PeNB generates the secondary configuration information according to the information of the second DRB, and carries the second DRB in the secondary configuration information, and sends the information to the UE.
  • the PeNB sends the secondary configuration information to the UE, which is used to indicate that the UE is bound to the EPS-Bearer and the DRB, and the PD is bound to the DRB by using the secondary configuration information that is sent by the PeNB.
  • the SeNB shares the data flow on the PeNB, and the PeNB acquires the second DRB allocated by the SeNB to the UE. If only one EPS-Bearer exists, the PeNB
  • the secondary configuration information sent by the UE may not carry the indication that the UE binds the second DRB with which EPS-Bearer.
  • the PeNB may also indicate, by using the sent secondary configuration information, which EPS-Bearer is bound to the second DRB.
  • the PeNB may send the secondary configuration information to the UE in multiple manners, for example, may be sent by the PeNB by using an RRC reconfiguration message sent by the UE, and the RRC reconfiguration message carries all the configuration parameters and the RB ID of the second DRB.
  • the RRC reconfiguration message may also carry an EPS-Bearer that needs to be bound. Specifically, it may be represented by an EPS-Bearer ID.
  • the secondary configuration information is used to instruct the UE to release the binding of the first EPS-Bearer and the first DRB, and bind the first EPS-Bearer and the second DRB, and the UE binds the first EPS according to the indication of the PeNB.
  • - Bearer and the second DRB as described in detail in the foregoing embodiment, the description of the data transmission method performed on the UE side.
  • the information of the second DRB may be the RB ID of the second DRB
  • the secondary configuration information is the RRC reconfiguration message
  • the PeNB sends the secondary configuration information to the UE, including:
  • the PeNB sends an RRC reconfiguration message, where the RRC reconfiguration message carries the RB ID of the second DRB and the ID of the first EPS-Bearer, and the RRC reconfiguration message also carries the Full Config parameter, where the Full Config parameter is used to indicate the UE binding.
  • the UE After the UE receives the RRC reconfiguration message, the UE can know that the first EPS-Bearer and the second DRB need to be bound by using the value of the Full Config parameter to be True. In this case, after obtaining the Full Config parameter in the RRC reconfiguration message, the UE establishes a mapping relationship between the ID of the first EPS-Bearer and the RB ID of the second DRB in the NAS layer.
  • the method may further include:
  • the PeNB receives the data stream sent by the SGW;
  • the PeNB offloads the data stream into the first downlink data stream and the second downlink data stream;
  • the PeNB sends the first downlink data stream to the UE via the SeNB, where the bearer that transmits the first downlink data stream between the SeNB and the UE is the second DRB;
  • the PeNB sends a second downlink data stream to the UE through the third DRB, where the third DRB is a data radio bearer allocated by the PeNB to the UE in the PCell.
  • two EPS-Bearers are established in the UE, which are a first EPS-Bearer and a second EPS-Bearer, respectively, where the second EPS-Bearer is bound to the third DRB, the first The EPS-Bearer is bound to the second DRB.
  • the first downlink data stream and the second downlink data stream may be obtained by the PeNB to offload the data stream received from the SGW, that is, the PeNB is used as a split point, and when the SGW sends the data stream, the PeNB receives the data stream from the SGW and divides the data into The first downlink data stream and the second downlink data stream are sent to the SeNB, so the UE can receive the first downlink data stream from the SeNB through the second DRB, and receive the first downlink data stream from the PeNB through the third DRB. Go to the second downstream data stream.
  • the PeNB after the PeNB acquires the information of the second DRB, the PeNB sends the secondary configuration information to the UE, where the secondary configuration information includes the second DRB allocated by the SeNB to the UE in the secondary cell, and the UE is bound.
  • the secondary configuration information includes the second DRB allocated by the SeNB to the UE in the secondary cell, and the UE is bound.
  • a first EPS-Bearer and a second DRB and the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, and after binding the first EPS-Bearer and the second DRB, the UE uses the first EPS - The second DRB transport stream bound by Bearer.
  • the first EPS-Bearer is bound to the second DRB, and the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, because the second DRB is the data radio bearer allocated by the SeNB to the UE in the SCell. Therefore, in the embodiment of the present invention, the first EPS-Bearer still establishes a corresponding relationship with the DRB, but corresponding to different time segments, the first EPS-Bearer may be bound to different DRBs, for example, the UE is receiving.
  • the first EPS-Bearer is bound to the first DRB before the secondary configuration information, but after the secondary configuration information is received, the first EPS-Bearer is bound to the second DRB, and the UE may receive the secondary configuration information after receiving the secondary configuration information in the embodiment of the present invention.
  • the first EPS-Bearer is re-bound, so that the binding of the first EPS-Bearer and the first DRB can be changed to the binding of the first EPS-Bearer and the second DRB, and the binding relationship can be established by changing the binding relationship.
  • the UE can use the second DRB bound to the first EPS-Bearer to transmit the data stream, and the UE can use the second DRB to transmit the data stream, thereby implementing UE and SeNB
  • the data stream is transmitted. Since the UE can bind the first EPS-Bearer and different DRBs in different time periods, it can flexibly select which DRB to use to transmit the data stream, meet the load balancing between different sites, and improve the user throughput. And resource utilization.
  • the two EPS-Bearers are respectively set up in the UE, which are the first EPS-Bearer and the second EPS-Bearer respectively, as shown in the left part of FIG. 3, which is a downlink data stream transmission before performing the traffic aggregation method of the carrier aggregation of the present invention.
  • the first EPS-Bearer is initially bound to the first DRB
  • the second EPS-Bearer is bound to the third DRB.
  • the downlink data stream includes: a first downlink data stream and a second downlink data stream, where Do not send to the UE through the second EPS-Bearer and the first EPS-Bearer.
  • FIG. 3 a schematic diagram of downlink data flow transmission after performing the traffic aggregation method of the carrier aggregation method, wherein the first EPS-Bearer and the second DRB are re-bound, after the SCell is added,
  • the DRB in the terminal still maintains - corresponding to the EPS-Bearer, but the correspondence changes, and the second DRB is the DRB allocated by the SeNB for the UE in the SCell, and the second EPS-Bearer and the third data radio bearer are bound.
  • the downlink data stream includes a first downlink data stream and a second downlink data stream, and then the first downlink data stream is sent to the SeNB through the second DRB, and the second downlink data stream is sent to the PeNB through the third DRB, and then the first downlink data stream is respectively sent to the PeNB.
  • the second downlink data stream and the first downlink data stream are sent to an interface between a modem and a terminal equipment (TE, Terminal Equipment), where the interface aggregates the first downlink data stream and the second downlink data stream, and then Output the downstream data stream.
  • TE Terminal Equipment
  • the data transmission method provided by another embodiment of the present invention may include the following steps:
  • the SRC establishes from the SRC to
  • the second DRB is a DRB allocated by the SeNB to the UE in the SCell, and the first EPS-Bearer is bound to the first DRB before being bound to the second DRB.
  • the SRC establishes a data channel from the SRC to the SCell, where the SRC is a logical function entity, which can be deployed in the PeNB or deployed as a separate network element, which is not limited herein.
  • the data channel established by the SRC may be a GPRS Tunneling Protocol User Plane (GTPU) tunnel or a Generic Route Encapsulation (GRE) tunnel, which is understandable.
  • GTPU GPRS Tunneling Protocol User Plane
  • GRE Generic Route Encapsulation
  • the SRC establishes a data channel from the SRC to the SCell, and may also be another transmission channel. As long as it can meet the PeNB, the SeNB, the SGW, and the Packet Data Network Gateway (PGW), the data stream can be transmitted.
  • PGW Packet Data Network Gateway
  • the SRC links the data channel to the second DRB.
  • the SRC needs to link the data channel to the second DRB in order to enable the data stream that is distributed to the SeNB by the SRC to be transmitted.
  • the EPS-Bearer is used to describe the end-to-end bearer from the UE to the PGW.
  • the first EPS-Bearer is specifically Slbearer, so the data channel can be linked with the Slbearer to achieve the data channel and the first EPS-Bearer link.
  • step 402SRC links the data channel with the second DRB
  • steps 403 to 405 may be performed, and the steps 406 and 407 may be performed, and the specific execution process may be determined by a specific application scenario.
  • the SRC receives the downlink data stream sent by the SGW.
  • the SGW sends a downlink data stream to the SRC, so that the SRC can obtain the downlink data stream.
  • the SRC divides the received data stream into a first downlink data stream and a second downlink data stream.
  • the SRC after the SRC receives the data stream, the SRC is split into the first downlink data stream and the second downlink data stream.
  • the SRC may change according to the load information of the network, and the connection status of the UE. Changes such as changes are made to determine how to offload to adjust the distribution of data streams in PCell and SCell.
  • the SRC sends the first downlink data stream and the second downlink data stream to the SeNB and the PeNB, respectively.
  • the SRC determines the data traffic of the first downlink data stream and the data traffic of the second downlink data stream according to the split ratio, and then sends the first downlink data stream to the SeNB by using the foregoing established data channel, and The second downlink data stream is sent to the PeNB, thereby realizing the re-adjustment of the distribution of the data stream in the PCell and the SCell.
  • the UE re-binds the first EPS-Bearer and the second DRB, and changes the binding relationship between the first EPS-Bearer and the DRB, and the SRC establishes a data channel from the SRC to the SCell, so the SRC
  • the first downlink data stream sent to the SeNB can be sent to the UE through the second DRB. Therefore, in the embodiment of the present invention, the first EPS-Bearer and the second DRB may be re-bound, so that the data stream sent by the SRC can be flexibly split into the first downlink data stream and the second downlink data stream, and then sent to the SeNB and respectively.
  • the flexibility of data stream offloading can be improved, load balancing between different sites can be satisfied, and user throughput and resource utilization can be improved.
  • the SRC receives the first uplink data stream sent by the SeNB by using the foregoing data channel.
  • the UE may send the first uplink data stream to be transmitted to the SeNB by using the second DRB, and after receiving the first uplink data stream, the SeNB receives the first uplink data stream.
  • the SRC receives the data through the data channel from the SRC to the SCell An upstream data stream.
  • the SRC sends the first uplink data stream to the SGW.
  • the SRC after receiving the first uplink data stream forwarded by the SeNB, the SRC sends the first uplink data stream to the SGW, thereby realizing that the uplink data stream is adjusted from being transmitted through the PCell to being transmitted through the SCell. Reduces the network load of PCell, but achieves flexible data offloading.
  • the UE re-binds the first EPS-Bearer and the second DRB, and changes the binding relationship of the first EPS-Bearer, so the SRC can receive the first uplink data stream sent by the UE from the SeNB.
  • the transmission mode in which the first uplink data stream is sent to the SRC through the PeNB is changed. Therefore, in the embodiment of the present invention, by rebinding the first EPS-Bearer and the second DRB, the flexibility of data stream offloading can be improved, load balancing between different sites can be satisfied, and user throughput and resource utilization rate can be improved.
  • the first evolved packet network bearer may specifically be Assisting
  • the bearer is divided into Default EPS-Bearer and Dedicated EPS-Bearer in the 3GPP standard.
  • Dedicated EPS-Bearer can only transmit specific data streams. Which data streams are determined by Traffic Flow Templete (TFT). The role of TFT is to map the determined data stream to the determined bearer. Default EPS-Bearer does not have a corresponding TFT, it can pass any data stream. If a data stream cannot find the corresponding Dedicated EPS-Bearer according to the TFT, it uses the Default EPS-Bearer to transmit. There is only one Default EPS-Bearer, which is established when the UE is attached, and the others are Dedicated EPS-Bearer.
  • TFT Traffic Flow Templete
  • the Assisting EPS-Bearer established when the UE is attached may be regarded as the second Default EPS-Bearer, or may be regarded as the Dedicated EPS-Bearer. If you look at the second Default EPS-Bearer, follow the existing process, you can trigger the establishment by the MME, just like The establishment of Default EPS-Bearer is the same. If Assisting EPS-Bearer is understood as Dedicated EPS-Bearer, it can be triggered by the terminal or by the core network (PCRF or PDNGW).
  • PCRF core network
  • Assisting EPS-Bearer is considered to be the second Default EPS-Bearer, then no TFT and related parameters need to be set for the Assisting EPS-Bearer.
  • a certain data stream cannot find the corresponding Dedicated EPS-Bearer, you can select one of the Assisting EPS-Bearer and Default EPS-Bearer for the data stream.
  • Assisting EPS-bearer is regarded as Dedicated EPS-Bearer, since Assisting does not know which data streams are transmitted on it when establishing, so to avoid the influence on other DedicatedEPS-bearers, the relevant parameters in TFT can be set as follows:
  • the Assisting EPS-Bearer becomes a dummy bearer, that is, no data is allocated to the bearer on the PDNGW or UE side.
  • a service data transmission without Dedicated EPS-Bearer For a service data transmission without Dedicated EPS-Bearer, trigger a Dedicated EPS-Bearer and treat the Dedicated EPS-Bearer as Assisting EPS-Bearer; if there is new service data stream and Dedicated EPS-Bearer already exists At the same time, the data stream can be merged into the existing Dedicated EPS-Bearer according to Quality of Service (QoS), and the TFT is updated. According to the bearer establishment mode, the data stream will be mainly transmitted in the Assisting EPS-Bearer.
  • QoS Quality of Service
  • FIG. 5 is a schematic diagram of an application scenario in a data transmission method according to an embodiment of the present invention.
  • the method is to establish an Assisting EPS-Bearer. If the UE originally has two or more EPS-Bearers, the Assisting EPS-Bearer may not be established. If the SCell is added at this time, since there is a complete protocol stack in the SeNB, this is This means that at least one DRB is established in the SCell. According to the correspondence between the EPS-Bearer and the DRB, these DRBs need to have an EPS-Bearer corresponding to them.
  • EPS-Bearer is an end-to-end bearer from the UE to the PGW.
  • the EPS-Bearer can be implemented by DRB, SI Bearer (E-RAB), and S5/S8 Bearer.
  • E-RAB SI Bearer
  • S5/S8 Bearer Specifically, the Default EPS-Bearer is implemented by the DRB3, E-RAB3, and S5/S8 Bearer segments, and the Assisting EPS-Bearer is implemented by the DRB1, E-RAB 1, and S5/S8 Bearer segments.
  • the Assisting EPS-Bearer refers to the foregoing.
  • the first EPS-Bearer, Default EPS-Bearer in the embodiment refers to the second EPS-Bearer in the foregoing embodiment.
  • the Assisting EPS-Bearer and the DRB1 are bound.
  • the PeNB sends the secondary configuration information to the UE, including the information of the DRB2, where the DRB is the DRB added by the SeNB to the UE in the SCell, and then the UE Bind DRB2 and Assisting EPS-Bearer to re-establish the mapping between Assisting EPS-Bearer and DRB2.
  • the data transmission method provided by the embodiment of the present invention is described in the following application scenario.
  • the data transmission method may include the following steps:
  • the data streams transmitted on the two EPS-Bearers are transmitted through the PeNB, the Assisting EPS-Bearer is bound to the DRB1, and the Default EPS-Bearer is bound to the DRB3.
  • the DRB1 refers to the foregoing embodiment.
  • the first DRB, DRB3 refers to the third DRB in the foregoing embodiment.
  • the service data stream is transmitted on the Default EPS-Bearer, and the Assisting EPS-Bearer is idle. That is, the data stream is transmitted in the DRB3, and the DRB1 is idle.
  • the UE receives the DRB2 (the DRB2 is the newly established DRB) allocated by the SeNB for the UE in the SCell, and then the UE binds the DRB2 and the Assisting EPS-Bearer.
  • the specific approach can be:
  • the SeNB allocates the RB ID of the DRB2 to the UE in the SCell, and configures all parameters of the L1 and L2 protocol stacks of the DRB2, and delivers the configuration parameters to the PeNB.
  • the PeNB carries the DRB2 in the RRC reconfiguration message to the UE.
  • the RRC reconfiguration message carries all the parameters of the DRB2, the RB ID, and the EPS-Bearer ID of the Assisting EPS-Bearer, and sets the Full Config parameter to Tme.
  • the UE After receiving the RRC reconfiguration message, the UE will bind the RB ID (DRB2) and the EPS-Bearer ID (Assisting EPS-Bearer) if the value of the Full Config parameter in the RRC reconfiguration message is True.
  • the original DRB (DRBl) corresponding to the EPS-Bearer ID is replaced with DRB2.
  • the EPS-bearer and the DRB still satisfy the mapping relationship, which is better compatible with the EPS-bearer in the prior art. DRB Between - the design of the mapping.
  • adding and suppressing the DRB in the RRC Connection Reconfiguration message may be as follows:
  • drb-Identity is the DRB ID assigned by SCell (ie DRB2)
  • eps-Bearerldentity is filled in the ID of Assisting EPS-Bearer
  • the code segment used by the UE to bind the first EPS-Bearer and the second DRB may be as follows:
  • the SRC establishes a data channel from the SRC to the SCell and links the data channel with the second DRB. In this way, the data stream transmitted in the Assisting EPS-Bearer can be sent to the UE through the SCell.
  • the data channel between the established SRC and the SCell may be a GTPU tunnel, a GRE tunnel, or other data channel.
  • the data channel may be a GTPU tunnel.
  • the service data stream is transmitted on the Default EPS-Bearer, and the Assisting EPS-Bearer is idle, that is, the data stream is transmitted in the DRB3, and the DRB1 is idle. It can be understood that before the SCell is added, the service data stream can also be transmitted on the Assisting EPS-Bearer.
  • the Default EPS-Bearer is idle, that is, the data stream is transmitted in the DRB1, and the DRB3 is idle.
  • the UE has two EPS-Bearers, which are respectively the default evolved packet network bearers.
  • the default EPS-Bearer and the assisted evolved packet network bear the Assisting EPS-Bearer, where the Assisting EPS-Bearer refers to the third EPS-Bearer in the foregoing embodiment, and the Default EPS-Bearer refers to the first in the foregoing embodiment.
  • EPS-Bearer Before the SCell is added, the data streams transmitted on the two EPS-Bearers are transmitted through the PeNB, the Assisting EPS-Bearer and the DRB2 are bound, and the Default EPS-Bearer is bound to the DRB1.
  • the DRB2 refers to the foregoing in the foregoing embodiment.
  • the second DRB, DRB1 refers to the first DRB in the foregoing embodiment.
  • the service data stream is transmitted on the Default EPS-Bearer, and the Assisting EPS-Bearer is idle. That is, the data stream is transmitted in the DRB 1, and the DRB2 is idle.
  • the PeNB re-allocates all L1/L2 parameters of the original DRB1 and all L1/L2 parameters of the DRB2 in the RRC reconfiguration message sent to the UE; meanwhile, sets the EPS-bearer ID in the DRB1 to the Assisting EPS.
  • -Bearer ID sets the EPS-bearer ID in DRB 2 to Default EPS-Bearer ID, and set the Full-config parameter to Tme.
  • DRB1 is bound to Assisting EPS-Bearer and DRB2 is bound to Default EPS-Bearer.
  • the binding of the Assisting EPS-Bearer to the second RB is implemented.
  • the DRB1 and the DRB2 actually correspond to the PCell and the SCell, and the data flow corresponds to the Default EPS-Bearer.
  • the binding relationship between the EPS-Bearer and the DRB can be exchanged between the PCell or the SCell.
  • the upstream data stream only sends data streams from one path, the switching of the upstream data stream in the PCell or SCell can be realized by such switching.
  • a UE 600 may include: a first unit 601, a second unit 602, and a third unit 603, where
  • the first unit 601 is configured to receive the secondary configuration information sent by the primary base station PeNB, where the secondary configuration information includes information about the second data radio bearer DRB allocated by the secondary base station SeNB to the UE in the secondary cell SCell, where the SeNB management office An SCell, where the SCell is a secondary cell of the UE;
  • the second unit 602 is configured to bind the first evolved packet network bearer EPS-Bearer and the second DRB, where the first EPS-Bearer is bound to the first DRB before being bound to the second DRB.
  • the first DRB is a data radio bearer allocated by the PeNB to the UE in the primary cell PCell, the PeNB manages the PCell, and the PCell is a primary cell of the UE;
  • the third unit 603 is configured to transmit the data stream using the second DRB bound to the first EPS-Bearer.
  • the first unit 601 is further configured to: receive primary configuration information sent by the PeNB, where the primary configuration information includes information of the first DRB;
  • the second unit 602 is further configured to: bind the first EPS-Bearer and the first DRB.
  • the first unit 601 is specifically configured to: receive a radio resource control protocol RRC reconfiguration message sent by the PeNB, where the RRC reconfiguration message carries a radio bearer identifier RB of the second DRB. An ID and an identifier of the first EPS-Bearer, the RRC reconfiguration message further carrying a full configuration Full Config parameter, where the Full Config parameter is used to indicate that the UE binds the first EPS-Bearer and the second DRB;
  • the second unit 602 is specifically configured to: when the RRC reconfiguration message is obtained, Full Config After the parameter, the mapping relationship between the ID of the first EPS-Bearer and the RB ID of the second DRB is established in the non-access NAS layer.
  • the third unit 603 when the SeNB sends the first downlink data stream by using the second DRB, the third unit 603 is specifically configured to: receive, by using the second DRB, the SeNB, First downlink data stream;
  • the third unit 603 is further configured to: when the UE receives the first downlink data stream sent by the SeNB by using the second DRB, if the PeNB sends the second downlink data stream by using the third DRB, Receiving, by the third DRB, the second downlink data stream that is sent by the PeNB, where the third DRB is bound to the second EPS-Bearer, and the third DRB is that the PeNB is the UE in the PCell. Allocated data radio bearer;
  • the first downlink data stream and the second downlink data stream are obtained by the unified control node SRC offloading the data stream received from the serving gateway SGW, or the first downlink data stream and the first The two downlink data flows are obtained by the PeNB offloading the data stream received from the SGW.
  • the data stream is an uplink data stream that the UE needs to send
  • the third unit 603 is specifically configured to: determine, by the first EPS-Bearer, the first EPS- The second DRB to which the bearer is bound is sent to the SeNB by the second DRB, and the uplink data stream that needs to be sent is sent by the SeNB to the SRC or the SGW.
  • the second DRB received by the first unit 601 is established by the SeNB in the SCell for the UE, and the information of the second DRB is used by the PeNB. Obtained from the SeNB and carried in the secondary configuration information and sent to the UE.
  • the first EPS-Bearer used by the second unit 602 is a default evolved packet network bearer Default EPS-Bearer, or a dedicated evolved packet network bearer Dedicated EPS-Bearer.
  • the first EPS-Bearer used by the second unit 602 is an assisted evolved packet network bearer Assisting EPS-Bearer;
  • the Assisting EPS-Bearer is triggered by the mobility management entity MME, or triggered by the PGW in the core network, or triggered by the UE to establish the EPS-Bearer.
  • the first unit receives the secondary configuration sent by the PeNB.
  • Information the secondary configuration information includes a second DRB allocated by the SeNB for the UE in the secondary cell, and then the second unit is bound to the first EPS-Bearer and the second DRB, and the first EPS-Bearer is bound to the second DRB.
  • the third unit Before being bound to the first DRB, after binding the first EPS-Bearer and the second DRB, the third unit transmits the data stream using the second DRB bound to the first EPS-Bearer.
  • the first EPS-Bearer is bound to the second DRB, and the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, because the second DRB is the data radio bearer allocated by the SeNB to the UE in the SCell. Therefore, in the embodiment of the present invention, the first EPS-Bearer still establishes a corresponding relationship with the DRB, but corresponding to different time segments, the first EPS-Bearer may be bound to different DRBs, for example, the UE is receiving.
  • the first EPS-Bearer is bound to the first DRB before the secondary configuration information, but after the secondary configuration information is received, the first EPS-Bearer is bound to the second DRB, and the UE is visible after receiving the secondary configuration information in the embodiment of the present invention.
  • the first EPS-Bearer may be re-bound, so that the binding of the first EPS-Bearer and the first DRB may be changed to the binding of the first EPS-Bearer and the second DRB, and the binding relationship may be changed.
  • the data stream is transmitted between the UE and the SeNB, because the UE can The first binding EPS-Bearer different DRB at different time periods, it is possible to use DRB to which the transport stream flexible options to meet different load balancing across the site, user throughput and improve resource utilization.
  • a PeNB 700 may include: a first unit 701 and a second unit 702, where
  • the first unit 701 is configured to acquire information about a second data radio bearer DRB allocated by the SeNB in the secondary cell SCell for the user equipment UE, where the SeNB manages the SCell, and the SCell is a secondary cell of the UE;
  • the second unit 702 is configured to send secondary configuration information to the UE, where the secondary configuration information includes information of the second DRB.
  • the second DRB is used by the UE to bind the first evolved packet network bearer EPS-Bearer and the second DRB to transmit a data stream according to the second DRB and the SeNB.
  • the PeNB 700 further includes: a third unit 703, where The third unit 703 is configured to: after the acquiring, the information about the second data radio bearer DRB allocated by the secondary base station SeNB for the user equipment UE in the secondary cell SCell, the first unit is allocated to the UE in the primary cell PCell.
  • a DRB the PeNB manages the PCell, and the PCell is a primary cell of the UE;
  • the second unit 702 is further configured to: send the primary configuration information to the UE, where the primary configuration information includes: information about the first DRB;
  • the first DRB is used by the UE to bind the first EPS-Bearer and the first DRB before binding the first EPS-Bearer and the second DRB.
  • the secondary configuration information sent by the second unit 702 is used to instruct the UE to release the binding of the first EPS-Bearer and the first DRB, and bind the binding The first EPS-Bearer and the second DRB are described.
  • the first unit 701 is specifically configured to: receive information about the second DRB sent by the SeNB; or receive information about the second DRB sent by the unified control node SRC, The information of the second DRB is sent by the SeNB to the SRC.
  • the information of the second DRB is a radio bearer identifier RB ID of the second DRB;
  • the secondary configuration information is a radio resource control protocol RRC reconfiguration message;
  • the RRC reconfiguration message is sent, where the RRC reconfiguration message carries the RB ID of the second DRB and the identifier of the first EPS-Bearer, and the RRC reconfiguration message also carries the fully configured Full Config parameter.
  • the Full Config parameter is used to instruct the UE to bind the first EPS-Bearer and the second DRB.
  • the PeNB 700 further includes: a fourth unit 704 and a fifth unit 705, where
  • the fourth unit 704 is configured to: after the second unit sends the secondary configuration information to the UE, receive the data stream sent by the SGW;
  • the fifth unit 705 is configured to: offload the data stream into a first downlink data stream and a second downlink data stream;
  • the second unit 702 is further configured to send the first downlink data stream to the UE by using the SeNB, where the SeNB and the UE transmit the first downlink data stream. Carrying the second DRB;
  • the second unit 702 is further configured to: send the second downlink to the UE by using a third DRB a data stream, where the third DRB is a data radio bearer allocated by the PeNB to the UE in the PCell.
  • the first unit acquires the information of the second DRB, and the second unit sends the secondary configuration information to the UE, where the secondary configuration information includes the second DRB allocated by the SeNB to the UE in the secondary cell, and the UE Binding the first EPS-Bearer and the second DRB, and the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, and after binding the first EPS-Bearer and the second DRB, the UE uses and An EPS-Bearer-bound second DRB transport stream.
  • the first EPS-Bearer is bound to the second DRB, and the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, because the second DRB is the data radio bearer allocated by the SeNB to the UE in the SCell. Therefore, in the embodiment of the present invention, the first EPS-Bearer still establishes a corresponding relationship with the DRB, but corresponding to different time segments, the first EPS-Bearer may be bound to different DRBs, for example, the UE is receiving.
  • the first EPS-Bearer is bound to the first DRB before the secondary configuration information, but after the secondary configuration information is received, the first EPS-Bearer is bound to the second DRB, and the UE is visible after receiving the secondary configuration information in the embodiment of the present invention.
  • the first EPS-Bearer may be re-bound, so that the binding of the first EPS-Bearer and the first DRB may be changed to the binding of the first EPS-Bearer and the second DRB, and the binding relationship may be changed.
  • the data stream is transmitted. Since the UE can bind the first EPS-Bearer and different DRBs in different time periods, it can flexibly select which DRB to use to transmit the data stream, meet the load balancing between different sites, and improve user throughput. Rate and resource utilization.
  • the embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium stores a program, and the program execution includes some or all of the arrangements described in the foregoing method embodiments.
  • the user equipment 800 includes:
  • the input device 801, the output device 802, the processor 803, and the memory 804 (wherein the number of processors 803 in the user device 800 may be one or more, and one processor in Fig. 8 is taken as an example).
  • the input device 801, the output device 802, the processor 803, and the memory 804 may be connected by a bus or other means, wherein the bus connection is taken as an example in FIG.
  • the memory 804 is used to store instructions and data.
  • the processor 803 is configured to perform the following steps:
  • the secondary configuration information includes information about a second data radio bearer DRB allocated by the secondary base station SeNB to the UE in the secondary cell SCell, where the SeNB manages the SCell, the SCell is a secondary cell of the UE;
  • the PeNB manages the PCell, and the PCell is a primary cell of the UE;
  • a data stream is transmitted by the output device using a second DRB bound to the first EPS-Bearer.
  • the processor 803 is further configured to: perform, after binding the first EPS-Bearer and the second DRB, receive, by using the input device, a primary configuration sent by the PeNB Information, the primary configuration information includes information of the first DRB, and the first EPS-Bearer is bound to the first DRB.
  • the processor 803 is specifically configured to: receive, by using the input device, a radio resource control protocol RRC reconfiguration message sent by the PeNB, where the RRC reconfiguration message carries a radio bearer identifier RB ID of the second DRB and an identifier ID of the first EPS-Bearer, where the RRC reconfiguration message further carries a fully configured Full Config parameter, where the Full Config parameter is used to indicate that the UE is bound to the first EPS- Bearer and second DRB;
  • the mapping relationship between the ID of the first EPS-Bearer and the RB ID of the second DRB is established in the non-access NAS layer.
  • the processor 803 is specifically configured to: when the SeNB sends the first downlink data stream by using the second DRB, using the input device to pass the Receiving, by the second DRB, the first downlink data stream sent by the SeNB;
  • the UE receives the first downlink data stream sent by the SeNB by using the second DRB, if the PeNB sends the second downlink data stream by using the third DRB, using the input device to pass the third DRB. And receiving, by the PeNB, a second downlink data stream, where the third DRB is bound to a second EPS-Bearer, where the third DRB is a data radio bearer allocated by the PeNB to the UE in the PCell;
  • the first downlink data stream and the second downlink data stream are obtained by the unified control node SRC offloading the data stream received from the serving gateway SGW, or the first downlink data stream and the first
  • the two downlink data flows are obtained by the PeNB offloading the data stream received from the SGW.
  • the processor 803 is specifically configured to: perform, by using the first EPS-Bearer, a second DRB that is bound to the first EPS-Bearer; The device sends the uplink data stream that needs to be sent to the SeNB by using the second DRB, and the SeNB sends the uplink data stream that needs to be sent to the SRC or the SGW.
  • the second DRB stored by the memory 804 is established by the SeNB for the UE in the SCell, and information of the second DRB is used by the PeNB from the The SeNB acquires and carries the information in the secondary configuration information and sends the information to the UE.
  • the first EPS-Bearer stored in the memory 804 is a default evolved packet network bearer Default EPS-Bearer, or a dedicated evolved packet network bearer Dedicated EPS-Bearer.
  • the first EPS-Bearer stored by the memory 804 is an assisted evolved packet network bearer Assisting EPS-Bearer;
  • the Assisting EPS-Bearer is triggered by the mobility management entity MME, or triggered by the PGW in the core network, or triggered by the UE to establish the EPS-Bearer.
  • the PeNB 900 includes:
  • the input device 901, the output device 902, the processor 903, and the memory 904 (wherein the number of processors 903 in the PeNB 900 may be one or more, and one processor in FIG. 9 is taken as an example).
  • the input device 901, the output device 902, the processor 903, and the memory 904 may be connected by a bus or other means, wherein the bus connection is taken as an example in FIG.
  • the memory 904 is configured to store instructions and data.
  • the processor 903 is configured to perform the following steps:
  • the second DRB is used by the UE to bind the first evolved packet network bearer EPS-Bearer and the second DRB to transmit a data stream according to the second DRB and the SeNB.
  • the processor 903 is further configured to: obtain the second data radio bearer DRB allocated by the secondary base station SeNB for the user equipment UE in the secondary cell SCell, in the primary cell PCell Allocating a first DRB to the UE, the PeNB managing the PCell, where the PCell is a primary cell of the UE;
  • the output device And sending, by the output device, the primary configuration information to the UE, where the primary configuration information includes: information about the first DRB;
  • the first DRB is used by the UE to bind the first EPS-Bearer and the first DRB before binding the first EPS-Bearer and the second DRB.
  • the processor 903 is specifically configured to: receive, by the input device, information about the second DRB sent by the SeNB; or receive a unified by using the input device. And controlling information about the second data radio bearer sent by the node SRC, where the second data radio bearer is sent by the SeNB to the SRC.
  • the information of the second DRB that is stored by the memory 904 is a radio bearer identifier RB ID of the second DRB, and the secondary configuration information is a radio resource control protocol RRC reconfiguration message.
  • the processor 903 is specifically configured to perform the following steps:
  • the RRC reconfiguration message is sent by the output device, where the RRC reconfiguration message carries the RB ID of the second DRB and the identifier of the first EPS-Bearer, and the RRC reconfiguration message also carries the fully configured Full Config parameter.
  • the Full Config parameter is used to indicate that the UE binds the first EPS-Bearer and the second DRB.
  • the processor 903 is further configured to: after transmitting the secondary configuration information to the UE, the PeNB receives the data stream sent by the SGW;

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de transmission de données, un équipement utilisateur (UE) et un nœud B évolué (eNB), le procédé de transmission de données consistant : en la réception par un UE des informations de configuration secondaire envoyées par un PeNB, les informations de configuration secondaire comprenant des informations de second DRB attribué pour l'UE par un SeNB dans une SCell, le SeNB gérant la SCell, et la SCell étant une cellule secondaire de l'UE; en l'association par l'UE d'un premier support EPS à un second DRB, le premier support EPS étant associé à un premier DRB avant d'être associé au second DRB, le premier DRB étant un support radio de données attribué pour l'UE par le PeNB dans la PCell, le PeNB gérant la PCell, et la PCell étant une cellule primaire de l'UE; et en la transmission par l'UE des flux de données à l'aide du second DRB associé au premier support EPS.
PCT/CN2013/091050 2013-12-31 2013-12-31 Procédé de transmission de données, équipement utilisateur et enb Ceased WO2015100590A1 (fr)

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