CN111989949B - Data transmission method and device - Google Patents
Data transmission method and device Download PDFInfo
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- CN111989949B CN111989949B CN201880092575.7A CN201880092575A CN111989949B CN 111989949 B CN111989949 B CN 111989949B CN 201880092575 A CN201880092575 A CN 201880092575A CN 111989949 B CN111989949 B CN 111989949B
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Abstract
A data transmission method and device. In the switching process, the transmission data of the terminal is switched from a first transmission mode to a second transmission mode, wherein one transmission mode is that two access network devices, namely a first access network device and a second access network device (101), are connected simultaneously, and uplink data or downlink data are transmitted among the terminal, the first access network device and the second access network device, so that data transmission in a simultaneous connection switching mode is realized.
Description
Technical Field
The present invention relates to wireless communication technologies, and in particular, to a data transmission method and apparatus.
Background
In the existing handover process, a terminal and an access network device maintain a set of Protocol stacks at the same time, and also only correspond to a Packet Data Convergence Protocol (PDCP) entity. The terminal is connected with the source access network device, only maintains the protocol stack of the source access network device, and performs data transmission with the source access network device, or is connected with the target access network device, only maintains the protocol stack of the target access network device, and performs data transmission with the target access network device.
In a New Radio (NR) system, such as a 5G application, in order to reduce a handover delay, a New handover mode, that is, a Simultaneous Connectivity (simultaneousness Connectivity) handover mode is proposed, in which a terminal may be simultaneously connected to a source access network device and a target access network device, and a protocol stack of the source access network device and a protocol stack of the target access network device are maintained.
Therefore, it is desirable to provide a data transmission method for realizing data transmission in a simultaneous connection switching manner.
Disclosure of Invention
Aspects of the present invention provide a data transmission method and apparatus, which are used to implement data transmission in a simultaneous connection switching manner.
In one aspect of the present invention, a data transmission method is provided, including:
in the switching process, the transmission data of the terminal is switched from the first transmission mode to the second transmission mode.
In another aspect of the present invention, there is provided a data transmission apparatus, including:
and the switching unit is used for switching the transmission data of the terminal from the first transmission mode to the second transmission mode in the switching process.
As can be seen from the foregoing technical solutions, in the embodiment of the present invention, in the switching process, the transmission data of the terminal is switched from the first transmission mode to the second transmission mode, where one transmission mode is to simultaneously connect two access network devices, that is, the first access network device and the second access network device, and uplink data or downlink data is transmitted between the terminal, the first access network device, and the second access network device, so that data transmission in the simultaneous connection switching mode is achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without inventive labor.
Fig. 1 is a schematic flow chart of a data transmission method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a data transmission device according to another embodiment of the present invention
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Fig. 1 is a flowchart illustrating a data transmission method according to an embodiment of the present invention, as shown in fig. 1.
101. In the switching process, the transmission data of the terminal is switched from the first transmission mode to the second transmission mode.
The first transmission mode may be a transmission mode adopted for transmitting data when the terminal is connected with the first access network device, and the second transmission mode may be a transmission mode adopted for transmitting data when the terminal is connected with the first access network device and the second access network device at the same time.
The second access network device may be a single access network device, or may also be multiple access network devices, which is not particularly limited in this embodiment.
For example, if a plurality of second access network devices are included in the handover command (HO command), then the access network device with the strongest signal in the plurality of second access network devices may be selected for data transmission, or all the access network devices in the plurality of second access network devices may be directly selected for data transmission.
It should be noted that the Access Network device related in the present invention may be an Evolved NodeB (eNB) in an Evolved Universal Mobile telecommunications System terrestrial Radio Access Network (E-UTRAN), or may also be a gbb (G-nb) in a Next Generation Radio Access Network (NG-RAN), which is not particularly limited in this embodiment.
Optionally, in a possible implementation manner of this embodiment, the first access network device may be a source access network device, and the second access network device may be a target access network device, which is not particularly limited in this embodiment.
The core idea of the present invention is that in a Simultaneous Connectivity (simultaneity) switching manner, a terminal may simultaneously maintain a protocol stack with a source access network device and a protocol stack with a target access network device, and may switch transmission data of the terminal from a first transmission mode to a second transmission mode in a switching process, where one transmission mode is to simultaneously connect two access network devices, that is, a first access network device and a second access network device, and uplink data or downlink data is transmitted between the terminal, the first access network device and the second access network device, thereby implementing data transmission in the Simultaneous Connectivity switching manner.
Optionally, in a possible implementation manner of this embodiment, the data sending entity of the first transmission mode may include, but is not limited to, at least one of the following entities: the terminal, a protocol entity in the terminal, a first access network device, a protocol entity in the first access network device, a second access network device and a protocol entity in the second access network device; accordingly, the data sending entity of the second transmission mode may include, but is not limited to, at least one of the following entities: the terminal, the protocol entity in the terminal, the first access network device, the protocol entity in the first access network device, the second access network device, and the protocol entity in the second access network device are not particularly limited in this embodiment.
Optionally, in a possible implementation manner of this embodiment, the data receiving entity of the first transmission mode may include, but is not limited to, at least one of the following entities: the terminal, a protocol entity in the terminal, a first access network device, a protocol entity in the first access network device, a second access network device and a protocol entity in the second access network device; accordingly, the data receiving entity of the second transmission mode may include, but is not limited to, at least one of the following entities: the terminal, a protocol entity in the terminal, the first access network device, the protocol entity in the first access network device, the second access network device, and the protocol entity in the second access network device are not particularly limited in this embodiment.
Optionally, in a possible implementation manner of this embodiment, if the data receiving entity changes from the first access network device to the first access network device and/or the second access network device, the terminal may perform uplink data transmission with the first access network device, or may also perform uplink data transmission with the second access network device, which is not particularly limited in this embodiment.
In a specific implementation process, the terminal may specifically send first uplink data to the first access network device. At this time, the first access network device may send the first uplink data to the second access network device through an X2 interface or a first receiving protocol entity of the first access network device.
The first receiving Protocol entity of the first Access network device may include, but is not limited to, at least one of a Physical (PHY) layer Protocol entity, a Media Access Control (MAC) layer Protocol entity, a Radio Link Control (RLC) layer Protocol entity, and a Packet Data Convergence Protocol (PDCP) layer Protocol entity, which is not particularly limited in this embodiment.
For example, the first receiving protocol entities are, from bottom to top, a PHY layer protocol entity, a MAC layer protocol entity, an RLC layer protocol entity, and a PDCP layer protocol entity in sequence.
For example, the terminal may specifically send first uplink data to the first access network device. At this time, after the first access network device successfully receives the first uplink data, the first uplink data may be sent to the second access network device through an X2 interface.
Alternatively, for another example, the first receiving protocol entity is an RLC layer protocol entity, and the implementation scheme of the implementation procedure is described below. The terminal may specifically send first uplink data to the first access network device. At this time, the first access network device may send the first uplink data to the second access network device through an RLC layer protocol entity of the first access network device.
In another specific implementation process, the terminal may specifically send the first uplink data to the second access network device. At this time, the second access network device may send the first uplink data to the first access network device through an X2 interface or a first receiving protocol entity of the second access network device.
The second receiving Protocol entity of the second Access network device may include, but is not limited to, at least one of a Physical (PHY) layer Protocol entity, a Media Access Control (MAC) layer Protocol entity, a Radio Link Control (RLC) layer Protocol entity, and a Packet Data Convergence Protocol (PDCP) layer Protocol entity, which is not particularly limited in this embodiment.
For example, the second receiving protocol entities are, from bottom to top, a PHY layer protocol entity, a MAC layer protocol entity, an RLC layer protocol entity, and a PDCP layer protocol entity in sequence.
For example, the terminal may specifically send second uplink data to the second access network device. At this time, after the second access network device successfully receives the second uplink data, the second uplink data may be sent to the first access network device through an X2 interface.
Alternatively, for another example, the second receiving protocol entity is an RLC layer protocol entity, and the implementation scheme of the implementation procedure is described below. The terminal may specifically send the first uplink data to the second access network device. At this time, the second access network device may send the second uplink data to the first access network device through an RLC layer protocol entity of the second access network device.
In another specific implementation process, the terminal may specifically send first uplink data to the first access network device. At this time, the first uplink data is copied after the first receiving protocol entity of the first access network device successfully receives the first uplink data, and then the first receiving protocol entity of the first access network device may send the first uplink data to the upper receiving protocol entity of the first access network device and the second access network device, respectively.
The first receiving Protocol entity of the first Access network device may include, but is not limited to, at least one of a Physical (PHY) layer Protocol entity, a Media Access Control (MAC) layer Protocol entity, a Radio Link Control (RLC) layer Protocol entity, and a Packet Data Convergence Protocol (PDCP) layer Protocol entity, which is not particularly limited in this embodiment.
For example, the first receiving protocol entities are, from bottom to top, a PHY layer protocol entity, a MAC layer protocol entity, an RLC layer protocol entity, and a PDCP layer protocol entity in sequence.
For example, taking the first receiving protocol entity as an RLC layer protocol entity as an example, the following implementation scheme of the implementation procedure is described. The terminal may specifically send first uplink data to the first access network device. At this time, the RLC layer protocol entity of the first access network device copies the first uplink data after successfully receiving the first uplink data, and then the RLC layer protocol entity of the first access network device may respectively send the first uplink data to the PDCP layer protocol entity of the first access network device and the second access network device.
In another specific implementation process, the terminal may specifically send the first uplink data to the second access network device. At this time, after the second receiving protocol entity of the second access network device successfully receives the first uplink data, the first uplink data is copied, and then, the second receiving protocol entity of the second access network device may send the first uplink data to the upper receiving protocol entity of the second access network device and the first access network device, respectively.
The second receiving Protocol entity of the second Access network device may include, but is not limited to, at least one of a Physical (PHY) layer Protocol entity, a Media Access Control (MAC) layer Protocol entity, a Radio Link Control (RLC) layer Protocol entity, and a Packet Data Convergence Protocol (PDCP) layer Protocol entity, which is not particularly limited in this embodiment.
For example, the second receiving protocol entities are, from bottom to top, a PHY layer protocol entity, a MAC layer protocol entity, an RLC layer protocol entity, and a PDCP layer protocol entity in sequence.
For example, taking the second receiving protocol entity as an RLC layer protocol entity as an example, the following implementation of the implementation procedure is described. The terminal may specifically send the first uplink data to the second access network device. At this time, the RLC layer protocol entity of the second access network device copies the first uplink data after successfully receiving the first uplink data, and then the RLC layer protocol entity of the second access network device may respectively send the first uplink data to the PDCP layer protocol entity of the second access network device and the first access network device.
In another specific implementation process, the terminal may specifically send first uplink data to the first access network device and the second access network device, or may also send the first uplink data to the first access network device and send the second uplink data to the second access network device.
For example, the sending protocol entity of the terminal duplicates the first uplink data, and then the sending protocol entity of the terminal sends the first uplink data to an upper layer receiving protocol entity of the sending protocol entity of the terminal, and the upper layer receiving protocol entity of the sending protocol entity of the terminal sends the first uplink data to the first access network device and the second access network device, respectively.
It can be understood that the transmission of uplink data can also be further implemented in combination with the above specific implementation process.
In this implementation manner, the uplink data, that is, the first uplink data and the second uplink data, may be at least one of data that is not correctly sent by the terminal and data to be sent by the terminal, and this embodiment is not particularly limited by this comparison.
Optionally, in a possible implementation manner of this embodiment, if the data sending entity is changed from the first access network device to the first access network device and/or the second access network device, the terminal may perform downlink data transmission with the first access network device, or may also perform downlink data transmission with the second access network device, which is not particularly limited in this embodiment.
In a specific implementation process, the terminal may specifically receive first downlink data sent by the first access network device and the second access network device, or sent by the second access network device.
The first downlink data may be sent by the first access network device to the second access network device through an X2 interface or a first sending protocol entity of the first access network device, or may also be sent by the second access network device to the first access network device through an X2 interface or a second sending protocol entity of the second access network device, which is not particularly limited in this embodiment.
The first sending Protocol entity of the first Access network device may include, but is not limited to, at least one of a Physical (PHY) layer Protocol entity, a Media Access Control (MAC) layer Protocol entity, a Radio Link Control (RLC) layer Protocol entity, and a Packet Data Convergence Protocol (PDCP) layer Protocol entity, which is not particularly limited in this embodiment.
For example, the first sending protocol entities are, from bottom to top, a PHY layer protocol entity, a MAC layer protocol entity, an RLC layer protocol entity, and a PDCP layer protocol entity in sequence.
The second sending Protocol entity of the second Access network device may include, but is not limited to, at least one of a Physical (PHY) layer Protocol entity, a Media Access Control (MAC) layer Protocol entity, a Radio Link Control (RLC) layer Protocol entity, and a Packet Data Convergence Protocol (PDCP) layer Protocol entity, which is not particularly limited in this embodiment.
For example, the second sending protocol entities are, from bottom to top, a PHY layer protocol entity, a MAC layer protocol entity, an RLC layer protocol entity, and a PDCP layer protocol entity in sequence.
In another specific implementation process, the terminal may specifically receive the first downlink data sent by the first access device and the second access network device, where the first downlink data may be a lower layer sending protocol entity of a first sending protocol entity of the first access network device and is copied and sent to the first access network device and the second access network device by the first access network device through the first sending protocol entity of the first access network device, or may also be a lower layer sending protocol entity of a second sending protocol entity of the second access network device and is copied and sent to the second access network device and the first access network device by the second access network device through the second sending protocol entity of the second access network device, which is not particularly limited in this embodiment.
For example, taking the first sending protocol entity as an RLC layer protocol entity as an example, the following implementation scheme of the implementation procedure is described. The first access network device may specifically copy the first downlink data through an RLC layer protocol entity of the first access network device, and send the copied first downlink data to an MAC layer protocol entity of the first access network device and the second access network device, where the first downlink data is sent to the terminal by the first access device and the second access network device.
Alternatively, for another example, the second sending protocol entity is an RLC layer protocol entity, and the implementation scheme of the implementation procedure is described below. The second access network device may specifically copy the first downlink data through an RLC layer protocol entity of the second access network device, and send the copied first downlink data to the MAC layer protocol entity of the second access network device and the first access network device, where the first downlink data is sent to the terminal by the first access device and the second access network device.
In another specific implementation process, the terminal may specifically receive first downlink data sent by the first access network device, and receive second downlink data sent by the second access network device.
It can be understood that the transmission of the downlink data can also be further implemented in combination with the above specific implementation process.
In this implementation manner, the downlink data, that is, the first downlink data and the second downlink data, may be at least one of data that is not correctly received by the terminal and data to be received by the terminal, and this embodiment is not particularly limited to this.
In the two implementation manners, the first uplink data and/or the second uplink data and/or the first downlink data and/or the second downlink data may be specifically transmitted through a designated bearer.
The specified bearer may include, but is not limited to, at least one path of a Master Cell Group (MCG) bearer (bearer), a Secondary Cell Group (SCG) bearer (bearer), an MCG split bearer (split bearer), and an SCG split bearer (split bearer), which is not particularly limited in this embodiment.
Optionally, in a possible implementation manner of this embodiment, the trigger condition of the handover may include, but is not limited to, a time trigger condition and/or an event trigger condition, which is not particularly limited in this embodiment.
In a specific implementation process, the time trigger condition may include, but is not limited to, a timer, and this embodiment does not particularly limit this.
For example, after receiving a handover request ack, the first access network device may start a timer, and after the timer expires, may start transmission of uplink data or downlink data.
In another specific implementation process, the event trigger condition may include, but is not limited to, indication information, which is not particularly limited in this embodiment.
Specifically, the indication information may include, but is not limited to, signaling indication information and/or user plane indication information, which is not particularly limited in this embodiment.
For example, the sending end of the signaling indication information may include at least one of a terminal, a first access network device, a second access network device, and a core network device, which is not particularly limited in this embodiment; the receiving end of the signaling indication information may include at least one of a terminal, a first access network device, a second access network device, and a core network device, which is not particularly limited in this embodiment.
The Core Network device may be a Mobility Management device, and specifically may be an Access and Mobility Management Function (AMF) in a 5G Core Network, that is, a Next Generation Core Network (NGCN), or may also be a Mobility Management Entity (MME) in an Evolved Packet Core (EPC), that is, a 4G Core Network, which is not particularly limited in this embodiment.
For another example, the signaling indication information may be Radio Resource Control (RRC) signaling, such as a handover command (HO command), RRC reconfiguration, or other new signaling, or may also be X2-AP signaling, such as a handover request acknowledgement (handover request ack), a Sequence Number (SN) STATUS transfer (STATUS transfer), or other new signaling, or may also be S1-AP signaling, which is not particularly limited in this embodiment.
Alternatively, for another example, the user plane indication information may be indication information carried in a packet header of a data packet, such as an RRC packet header, a PDCP packet header, an RLC packet header, or a MAC packet header.
Further, in the implementation process, the indication information may be further used to indicate which implementation process in the previous implementation manner is adopted for the transmission path of the first uplink data and/or the second uplink data and/or the first downlink data and/or the second downlink data.
In this embodiment, in the switching process, the transmission data of the terminal is switched from the first transmission mode to the second transmission mode, where one transmission mode is to simultaneously connect two access network devices, that is, a first access network device and a second access network device, and uplink data or downlink data is transmitted between the terminal, the first access network device, and the second access network device, so that data transmission in the simultaneous connection switching mode is realized.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
Fig. 2 is a schematic structural diagram of a data transmission apparatus according to another embodiment of the present invention, as shown in fig. 2. The data transmission apparatus of the present embodiment may include a switching unit 21, which may be configured to switch the transmission data of the terminal from the first transmission mode to the second transmission mode during the switching process.
The first transmission mode may be a transmission mode adopted for transmitting data when the terminal is connected with the first access network device, and the second transmission mode may be a transmission mode adopted for transmitting data when the terminal is connected with the first access network device and the second access network device at the same time.
The second access network device may be a single access network device, or may also be multiple access network devices, which is not particularly limited in this embodiment.
For example, if a plurality of second access network devices are included in the handover command (HO command), then the access network device with the strongest signal in the plurality of second access network devices may be selected for data transmission, or all the access network devices in the plurality of second access network devices may be directly selected for data transmission.
It should be noted that the Access Network device related in the present invention may be an Evolved NodeB (eNB) in an Evolved Universal Mobile telecommunications System terrestrial Radio Access Network (E-UTRAN), or may also be a gbb (G-nb) in a Next Generation Radio Access Network (NG-RAN), which is not particularly limited in this embodiment.
Optionally, in a possible implementation manner of this embodiment, the first access network device may be a source access network device, and the second access network device may be a target access network device, which is not particularly limited in this embodiment.
The core idea of the present invention is that in a Simultaneous Connectivity (simultaneity) switching manner, a terminal may simultaneously maintain a protocol stack with a source access network device and a protocol stack with a target access network device, and may switch transmission data of the terminal from a first transmission mode to a second transmission mode in a switching process, where one transmission mode is to simultaneously connect two access network devices, that is, a first access network device and a second access network device, and uplink data or downlink data is transmitted between the terminal, the first access network device and the second access network device, thereby implementing data transmission in the Simultaneous Connectivity switching manner.
Optionally, in a possible implementation manner of this embodiment, the data sending entity of the first transmission mode may include, but is not limited to, at least one of the following entities: the terminal, a protocol entity in the terminal, a first access network device, a protocol entity in the first access network device, a second access network device and a protocol entity in the second access network device; accordingly, the data sending entity of the second transmission mode may include, but is not limited to, at least one of the following entities: the terminal, the protocol entity in the terminal, the first access network device, the protocol entity in the first access network device, the second access network device, and the protocol entity in the second access network device are not particularly limited in this embodiment.
Optionally, in a possible implementation manner of this embodiment, the data receiving entity of the first transmission mode may include, but is not limited to, at least one of the following entities: the terminal, a protocol entity in the terminal, a first access network device, a protocol entity in the first access network device, a second access network device and a protocol entity in the second access network device; accordingly, the data receiving entity of the second transmission mode may include, but is not limited to, at least one of the following entities: the terminal, a protocol entity in the terminal, the first access network device, the protocol entity in the first access network device, the second access network device, and the protocol entity in the second access network device are not particularly limited in this embodiment.
Optionally, in a possible implementation manner of this embodiment, if the data receiving entity is changed from the first access network device to the first access network device and/or the second access network device, the data transmission device may perform uplink data transmission.
In a specific implementation process, if the data transmission device is the terminal, the switching unit 21 may be further configured to
Sending first uplink data to the first access network device, so that the first access network device sends the first uplink data to the second access network device through an X2 interface or a first receiving protocol entity of the first access network device; and/or
Sending first uplink data to the second access network device, so that the second access network device sends the first uplink data to the first access network device through an X2 interface or a first receiving protocol entity of the second access network device; and/or
Sending first uplink data to the first access network device, so that a first receiving protocol entity of the first access network device copies the first uplink data after successfully receiving the first uplink data, and the first receiving protocol entity of the first access network device sends the first uplink data to an upper layer receiving protocol entity of the first access network device and the second access network device respectively; and/or
Sending first uplink data to the second access network device, so that a second receiving protocol entity of the second access network device copies the first uplink data after successfully receiving the first uplink data, and the second receiving protocol entity of the second access network device sends the first uplink data to an upper layer receiving protocol entity of a second receiving protocol entity of the second access network device and the first access network device respectively; and/or
And respectively sending first uplink data to the first access network device and the second access network device, or sending first uplink data to the first access network device and sending second uplink data to the second access network device.
In another specific implementation process, if the data transmission device is the first access network device, the switching unit 21 may be further configured to use the data transmission device as the first access network device
Receiving first uplink data sent by the terminal, and sending the first uplink data to the second access network device through an X2 interface or a first sending protocol entity of the first access network device; and/or
Receiving first uplink data sent by the terminal, copying the first uplink data after a first receiving protocol entity of the first access network device successfully receives the first uplink data, and sending the first uplink data to an upper layer receiving protocol entity of the first access network device and the second access network device by the first receiving protocol entity of the first access network device respectively; and/or
And the second access network equipment receives the first uplink data sent by the terminal or receives the first uplink data sent by the terminal, and the second uplink data sent by the terminal is received by the second access network equipment.
In another specific implementation process, if the data transmission device is the second access network device, the switching unit 21 may be further configured to use the second access network device as the data transmission device
Receiving first uplink data sent by the terminal, and sending the first uplink data to the first access network device through an X2 interface or a second sending protocol entity of the second access network device; and/or
Receiving first uplink data sent by the terminal, copying the first uplink data after a second receiving protocol entity of the second access network device successfully receives the first uplink data, and sending the first uplink data to an upper receiving protocol entity of a second receiving protocol entity of the second access network device and the first access network device by the second receiving protocol entity of the second access network device respectively; and/or
And the first access network equipment receives first uplink data sent by the terminal or receives second uplink data sent by the terminal, wherein the first uplink data sent by the terminal is received by the first access network equipment.
In this implementation manner, the uplink data, that is, the first uplink data and the second uplink data, may be at least one of data that is not correctly sent by the terminal and data to be sent by the terminal, and this embodiment is not particularly limited by this comparison.
The first receiving Protocol entity of the first Access network device may include, but is not limited to, at least one of a Physical (PHY) layer Protocol entity, a Media Access Control (MAC) layer Protocol entity, a Radio Link Control (RLC) layer Protocol entity, and a Packet Data Convergence Protocol (PDCP) layer Protocol entity, which is not particularly limited in this embodiment.
The second receiving Protocol entity of the second Access network device may include, but is not limited to, at least one of a Physical (PHY) layer Protocol entity, a Media Access Control (MAC) layer Protocol entity, a Radio Link Control (RLC) layer Protocol entity, and a Packet Data Convergence Protocol (PDCP) layer Protocol entity, which is not particularly limited in this embodiment.
Optionally, in a possible implementation manner of this embodiment, if the data sending entity is changed from the first access network device to the first access network device and/or the second access network device, the data transmission apparatus may perform downlink data transmission.
In a specific implementation process, if the data transmission device is the terminal, the switching unit 21 may be further configured to
Receiving first downlink data sent by the first access network device and the second access network device, or sent by the second access network device, where the first downlink data is sent by the first access network device to the second access network device through an X2 interface or a first sending protocol entity of the first access network device, or sent by the second access network device to the first access network device through an X2 interface or a second sending protocol entity of the second access network device; and/or
Receiving the first downlink data sent by the first access device and the second access network device, where the first downlink data is sent to the lower layer sending protocol entity of the first access network device and the second access network device after being copied by the first access network device through the first sending protocol entity of the first access network device, or sent to the lower layer sending protocol entity of the second access network device and the first access network device after being copied by the second access network device through the second sending protocol entity of the second access network device; and/or
And receiving first downlink data sent by the first access network equipment, and receiving second downlink data sent by the second access network equipment.
In another specific implementation process, if the data transmission device is the first access network device, the switching unit 21 may be further configured to use the data transmission device as the first access network device
Sending the first downlink data to the second access network device through an X2 interface or a first sending protocol entity of the first access network device, where the first downlink data is sent to the terminal by the first access network device and the second access network device, or by the second access network device; and/or
Copying the first downlink data through a first sending protocol entity of the first access network equipment, and sending the copied first downlink data to a lower layer sending protocol entity of the first access network equipment and second access network equipment, and sending the first downlink data to the terminal through the first access equipment and the second access network equipment; and/or
And sending first downlink data to the terminal, and sending second downlink data to the terminal by the second access network equipment.
In another specific implementation process, if the data transmission device is the second access network device, the switching unit 21 may be further configured to use the second access network device as the data transmission device
Sending first downlink data to the first access network device through an X2 interface or a second sending protocol entity of the second access network device, where the first downlink data is sent to the terminal by the first access network device and the second access network device, or by the first access network device; and/or
Copying the first downlink data through a second sending protocol entity of the second access network device, and sending the copied first downlink data to a lower layer sending protocol entity of the second access network device and the first access network device, and sending the first downlink data to the terminal through the first access device and the second access network device; and/or
And sending second downlink data to the terminal, wherein the first downlink data is sent to the terminal by the first access network equipment.
The first sending Protocol entity of the first Access network device may include, but is not limited to, at least one of a Physical (PHY) layer Protocol entity, a Media Access Control (MAC) layer Protocol entity, a Radio Link Control (RLC) layer Protocol entity, and a Packet Data Convergence Protocol (PDCP) layer Protocol entity, which is not particularly limited in this embodiment.
The second sending Protocol entity of the second Access network device may include, but is not limited to, at least one of a Physical (PHY) layer Protocol entity, a Media Access Control (MAC) layer Protocol entity, a Radio Link Control (RLC) layer Protocol entity, and a Packet Data Convergence Protocol (PDCP) layer Protocol entity, which is not particularly limited in this embodiment.
In this implementation manner, the downlink data, that is, the first downlink data and the second downlink data, may be at least one of data that is not correctly received by the terminal and data to be received by the terminal, and in contrast to the above two implementation manners, in this embodiment, the first uplink data and/or the second uplink data and/or the first downlink data and/or the second downlink data may be specifically transmitted through a designated bearer.
The specified bearer may include, but is not limited to, at least one path of a Master Cell Group (MCG) bearer (bearer), a Secondary Cell Group (SCG) bearer (bearer), an MCG split bearer (split bearer), and an SCG split bearer (split bearer), which is not particularly limited in this embodiment.
Optionally, in a possible implementation manner of this embodiment, the trigger condition of the handover may include, but is not limited to, a time trigger condition and/or an event trigger condition, which is not particularly limited in this embodiment.
In a specific implementation process, the time trigger condition may include, but is not limited to, a timer, and this embodiment does not particularly limit this.
In another specific implementation process, the event trigger condition may include, but is not limited to, indication information, which is not particularly limited in this embodiment.
Specifically, the indication information may include, but is not limited to, signaling indication information and/or user plane indication information, which is not particularly limited in this embodiment.
Further, in the implementation process, the indication information may be further used to indicate which implementation process in the previous implementation manner is adopted for the transmission path of the first uplink data and/or the second uplink data and/or the first downlink data and/or the second downlink data.
It should be noted that the method in the embodiment corresponding to fig. 1 may be implemented by the data transmission device provided in this embodiment. For a detailed description, reference may be made to relevant contents in the embodiment corresponding to fig. 1, and details are not described here.
In this embodiment, in the switching process, the switching unit switches the transmission data of the terminal from the first transmission mode to the second transmission mode, where one transmission mode is to connect two access network devices, that is, the first access network device and the second access network device, and the terminal, the first access network device, and the second access network device transmit uplink data or downlink data, so as to implement data transmission in the simultaneous connection switching mode.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (16)
1. A method for transmitting data, comprising:
in the switching process, the transmission data of the terminal is switched from the first transmission mode to the second transmission mode,
the first transmission mode is a transmission mode adopted by data transmission when the terminal is connected with first access network equipment; the second transmission mode is a transmission mode adopted by the terminal to transmit data when the terminal is connected with the first access network equipment and the second access network equipment simultaneously,
wherein the content of the first and second substances,
when the terminal is a data sending entity, if the data receiving entity changes from the first access network device to the first access network device and the second access network device or to the second access network device, the method further includes:
the terminal sends first uplink data to the first access network device, so that the first access network device sends the first uplink data to the second access network device through an X2 interface or a first receiving protocol entity of the first access network device; or
The terminal sends first uplink data to the second access network device, so that the second access network device sends the first uplink data to the first access network device through an X2 interface or a first receiving protocol entity of the second access network device; or
The terminal sends first uplink data to the first access network device, so that the first uplink data is copied after a first receiving protocol entity of the first access network device successfully receives the first uplink data, and the first receiving protocol entity of the first access network device sends the first uplink data to an upper layer receiving protocol entity of the first access network device and the second access network device respectively; or
The terminal sends first uplink data to the second access network device, so that a second receiving protocol entity of the second access network device copies the first uplink data after successfully receiving the first uplink data, and the second receiving protocol entity of the second access network device sends the first uplink data to an upper receiving protocol entity of a second receiving protocol entity of the second access network device and the first access network device respectively; or
The terminal respectively sends first uplink data to the first access network device and the second access network device, or sends first uplink data to the first access network device and sends second uplink data to the second access network device, or
Wherein the content of the first and second substances,
when the terminal is the data receiving entity, if the data sending entity changes from the first access network device to the first access network device and the second access network device or to the second access network device, the method further includes:
the terminal receives first downlink data sent by the first access network device and the second access network device, or sent by the second access network device, where the first downlink data is sent to the second access network device by the first access network device through an X2 interface or a first sending protocol entity of the first access network device, or sent to the first access network device by the second access network device through an X2 interface or a second sending protocol entity of the second access network device; or
The terminal receives the first downlink data sent by the first access device and the second access network device, wherein the first downlink data is sent to the first access network device through a first sending protocol entity of the first access network device, the first downlink data is copied and sent to a lower layer sending protocol entity of the first access network device and the second access network device, or the second access network device copies the first downlink data through a second sending protocol entity of the second access network device and sent to a lower layer sending protocol entity of the second access network device and the first access network device; or
The terminal receives first downlink data sent by the first access network equipment and second downlink data sent by the second access network equipment,
wherein the trigger condition for the handover comprises a time trigger condition comprising a timer,
wherein, in the switching process, switching the transmission data of the terminal from the first transmission mode to the second transmission mode comprises:
after the first access network equipment receives the switching request response, starting a timer; and
and after the timer is overtime, switching the transmission data of the terminal from the first transmission mode to the second transmission mode to start the transmission of the uplink data or the downlink data.
2. The method of claim 1, wherein the first receive protocol entity of the first access network device and/or the first transmit protocol entity of the first access network device and/or the second receive protocol entity of the second access network device or the second transmit protocol entity of the second access network device comprises at least one of a PHY layer protocol entity and/or a MAC layer protocol entity and/or an RLC layer protocol entity and a PDCP layer protocol entity.
3. The method according to claim 1, wherein the first uplink data and/or the second uplink data and/or the first downlink data and/or the second downlink data are transmitted through a specified bearer.
4. The method of claim 3, wherein the specified bearer comprises at least one path of MCG bearer, SCG bearer, MCG split bearer and SCG split bearer.
5. The method according to any of claims 1 to 4, wherein the trigger condition for the handover further comprises an event trigger condition.
6. The method of claim 5, wherein the event trigger condition comprises an indication.
7. The method according to claim 6, wherein the indication information comprises signaling indication information and/or user plane indication information.
8. The method according to claim 7, wherein the indication information is further used for indicating a transmission path of the first uplink data and/or the second uplink data and/or the first downlink data and/or the second downlink data.
9. An apparatus for transmitting data, comprising:
a switching unit for switching transmission data of the terminal from a first transmission mode to a second transmission mode during a switching process,
the first transmission mode is a transmission mode adopted by data transmission when the terminal is connected with first access network equipment; the second transmission mode is a transmission mode adopted by the terminal to transmit data when the terminal is connected with the first access network equipment and the second access network equipment simultaneously,
wherein the content of the first and second substances,
the transmission device is the terminal, and when the terminal is a data sending entity, if the data receiving entity changes from the first access network device to the first access network device and the second access network device or to the second access network device, the switching unit is further configured to:
sending first uplink data to the first access network device, so that the first access network device sends the first uplink data to the second access network device through an X2 interface or a first receiving protocol entity of the first access network device; or
Sending first uplink data to the second access network device, so that the second access network device sends the first uplink data to the first access network device through an X2 interface or a first receiving protocol entity of the second access network device; or
Sending first uplink data to the first access network device, so that a first receiving protocol entity of the first access network device copies the first uplink data after successfully receiving the first uplink data, and the first receiving protocol entity of the first access network device sends the first uplink data to an upper layer receiving protocol entity of the first access network device and the second access network device respectively; or
Sending first uplink data to the second access network device, so that a second receiving protocol entity of the second access network device copies the first uplink data after successfully receiving the first uplink data, and the second receiving protocol entity of the second access network device sends the first uplink data to an upper layer receiving protocol entity of a second receiving protocol entity of the second access network device and the first access network device respectively; or
Respectively sending first uplink data to the first access network device and the second access network device, or sending first uplink data to the first access network device and sending second uplink data to the second access network device, or
Wherein the content of the first and second substances,
the transmission device is the first access network device, and when the terminal is a data sending entity, if the data receiving entity changes from the first access network device to the first access network device and the second access network device or to the second access network device, the switching unit is further configured to:
receiving first uplink data sent by the terminal, and sending the first uplink data to the second access network device through an X2 interface or a first sending protocol entity of the first access network device; or
Receiving first uplink data sent by the terminal, copying the first uplink data after a first receiving protocol entity of the first access network device successfully receives the first uplink data, and sending the first uplink data to an upper layer receiving protocol entity of the first access network device and the second access network device by the first receiving protocol entity of the first access network device respectively; or
And the second access network equipment receives the first uplink data sent by the terminal or receives the first uplink data sent by the terminal, and the second uplink data sent by the terminal is received by the second access network equipment or
Wherein the content of the first and second substances,
the transmission device is the second access network device, and when the terminal is a data sending entity, if the data receiving entity changes from the first access network device to the first access network device and the second access network device or to the second access network device, the switching unit is further configured to:
receiving first uplink data sent by the terminal, and sending the first uplink data to the first access network device through an X2 interface or a second sending protocol entity of the second access network device; or
Receiving first uplink data sent by the terminal, copying the first uplink data after a second receiving protocol entity of the second access network device successfully receives the first uplink data, and sending the first uplink data to an upper receiving protocol entity of a second receiving protocol entity of the second access network device and the first access network device by the second receiving protocol entity of the second access network device respectively; or
And the first access network equipment receives first uplink data sent by the terminal or receives second uplink data sent by the terminal, wherein the first uplink data sent by the terminal is received by the first access network equipment or
Wherein the content of the first and second substances,
the transmission device is the terminal, and when the terminal is a data receiving entity, if the data sending entity changes from the first access network device to the first access network device and the second access network device or to the second access network device, the switching unit is further configured to:
receiving first downlink data sent by the first access network device and the second access network device, or sent by the second access network device, where the first downlink data is sent by the first access network device to the second access network device through an X2 interface or a first sending protocol entity of the first access network device, or sent by the second access network device to the first access network device through an X2 interface or a second sending protocol entity of the second access network device; or
Receiving the first downlink data sent by the first access device and the second access network device, where the first downlink data is sent to the lower layer sending protocol entity of the first access network device and the second access network device after being copied by the first access network device through the first sending protocol entity of the first access network device, or sent to the lower layer sending protocol entity of the second access network device and the first access network device after being copied by the second access network device through the second sending protocol entity of the second access network device; or
Receiving first downlink data sent by the first access network equipment, receiving second downlink data sent by the second access network equipment, or
Wherein the content of the first and second substances,
the transmission apparatus is the first access network device, and when the terminal is a data receiving entity, if the data sending entity changes from the first access network device to the first access network device and the second access network device or to the second access network device, the switching unit is further configured to:
sending the first downlink data to the second access network device through an X2 interface or a first sending protocol entity of the first access network device, where the first downlink data is sent to the terminal by the first access network device and the second access network device, or by the second access network device; or
Copying the first downlink data through a first sending protocol entity of the first access network equipment, and sending the copied first downlink data to a lower layer sending protocol entity of the first access network equipment and second access network equipment, and sending the first downlink data to the terminal through the first access equipment and the second access network equipment; or
Sending first downlink data to the terminal, and sending second downlink data to the terminal by the second access network device, or
Wherein the content of the first and second substances,
the apparatus is the second access network device, and when the terminal is a data receiving entity, if the data sending entity changes from the first access network device to the first access network device and the second access network device or to the second access network device, the switching unit is further configured to:
sending first downlink data to the first access network device through an X2 interface or a second sending protocol entity of the second access network device, where the first downlink data is sent to the terminal by the first access network device and the second access network device, or by the first access network device; or
Copying the first downlink data through a second sending protocol entity of the second access network device, and sending the copied first downlink data to a lower layer sending protocol entity of the second access network device and the first access network device, and sending the first downlink data to the terminal through the first access device and the second access network device; or
Sending second downlink data to the terminal, the first downlink data being sent to the terminal by the first access network device,
wherein the trigger condition for the handover comprises a time trigger condition comprising a timer,
wherein, the switching unit is specifically configured to:
after the first access network equipment receives the switching request response, starting a timer; and
and after the timer is overtime, switching the transmission data of the terminal from the first transmission mode to the second transmission mode to start the transmission of the uplink data or the downlink data.
10. The apparatus of claim 9, wherein the first receive protocol entity of the first access network device and/or the first transmit protocol entity of the first access network device and/or the second receive protocol entity of the second access network device and/or the second transmit protocol entity of the second access network device comprises at least one of a PHY layer protocol entity, a MAC layer protocol entity, an RLC layer protocol entity, and a PDCP layer protocol entity.
11. The apparatus according to claim 9, wherein the first uplink data and/or the second uplink data and/or the first downlink data and/or the second downlink data are transmitted through a specified bearer.
12. The apparatus of claim 11, wherein the designated bearer comprises at least one path of MCG bearer, SCG bearer, MCG split bearer, and SCG split bearer.
13. The apparatus according to any of claims 9 to 12, wherein the trigger condition for the handover further comprises an event trigger condition.
14. The apparatus of claim 13, wherein the event trigger condition comprises an indication.
15. The apparatus according to claim 14, wherein the indication information comprises signaling indication information and/or user plane indication information.
16. The apparatus according to claim 15, wherein the indication information is further used to indicate a transmission path of the first uplink data and/or the second uplink data and/or the first downlink data and/or the second downlink data.
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| US20150089382A1 (en) * | 2013-09-26 | 2015-03-26 | Wu-chi Feng | Application context migration framework and protocol |
| KR101751154B1 (en) * | 2014-01-17 | 2017-06-26 | 삼성전자주식회사 | Dual connectivity mode of operation of a user equipment in a wireless communication network |
| EP2983439B1 (en) * | 2014-08-06 | 2020-12-16 | Alcatel Lucent | Special cell selection at secondary network nodes supporting dual connectivity |
| EP3318097B1 (en) * | 2015-07-01 | 2020-11-11 | LG Electronics Inc. | Method for transmitting data in dual connectivity and a device therefor |
| CN108366365B (en) * | 2017-01-26 | 2021-03-23 | 华为技术有限公司 | Method and equipment for accessing target cell |
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| CN104244349A (en) * | 2013-06-18 | 2014-12-24 | 索尼公司 | Communication device and communication method |
| CN108029066A (en) * | 2015-09-18 | 2018-05-11 | 三星电子株式会社 | For the method switched in a wireless communication system and the device for supporting this method |
| CN105939381A (en) * | 2016-06-14 | 2016-09-14 | 惠州Tcl移动通信有限公司 | Method and system of control terminal for automatically switching file downloading mode |
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