WO2018103675A1

WO2018103675A1 - Data stream remapping method and apparatus, user equipment and ran device

Info

Publication number: WO2018103675A1
Application number: PCT/CN2017/114879
Authority: WO
Inventors: 施小娟
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-12-06
Filing date: 2017-12-06
Publication date: 2018-06-14
Also published as: CN108156633A

Abstract

A data stream remapping method and apparatus, a user equipment and a RAN device. The method comprises: a user equipment (UE) receiving data stream remapping information notified by a radio access network (RAN) device; and the UE executing a data stream remapping operation according to the data stream remapping information.

Description

Data stream remapping method and device, user equipment, RAN equipment

Technical field

The present disclosure relates to the field of wireless communication technologies, for example, to a data stream remapping method and apparatus, and a user equipment, a RAN device.

Background technique

In the past few decades, mobile communication networks have undergone continuous development, from the second generation mobile communication system (2G), 3G to 4G, in the process of new communication devices, such as intelligence Terminals, handheld tablets, etc. are constantly emerging, and the emergence of new communication devices has spawned a large number of new applications and new communication scenarios, which can be expected in the next few years, whether it is the number of devices connected to the wireless network or The data transfer rate or network capacity of each user will increase exponentially. Therefore, with the full application of 4G technology, the industry began to study the next generation of mobile communications, the 5th generation (5G) mobile communication technology.

Compared with 4G systems, in order to achieve 1000 times network throughput, 100 times device connection number and 10 times low latency, 5G systems will not be a single wireless access technology system, but can be used in combination including 4G further. Evolved Long Term Evolution (eLTE) technology after evolution, wireless local access network (WLAN) related technologies such as Wireless Local Area Network (WLAN) related technologies, adopting these different wireless access technologies The Radio Access Network (RAN) is connected to the unified 5G core network.

The above wireless access network adopting different radio access technologies accesses the unified 5G core network. In order to ensure the scalability of the network, the 5G system needs to be “decoupled” to design the core network and the access network, that is, the core needs to be implemented. The network and the access network can evolve independently without causing synchronization enhancement or change of the other side network due to enhancement or change of one side network. An important issue in the decoupling design of the core network and the access network is how to meet the requirements of different services on the quality of service (QoS) in different scenarios.

In the related system defined by the 3rd Generation Partnership Project (3GPP), the QoS architecture is a design in which the core network and the access network are coupled. Taking the QoS architecture of the 4G LTE system as an example, a bearer is used as a minimum QoS processing unit for data transmission. FIG. 1 is a schematic diagram of a Qos architecture in LTE. As shown in Figure 1, the QoS architecture performs data in units of bearer granularity. For the transmission, FIG. 1 only shows a case where a PDN connection is established between a User Equipment (UE) and a Packet Data Network (PDN). For services with different QoS requirements on the PDN connection, the core network may establish multiple Evolved Packet System bearers (EPS bearers) between the UE and the PDN Gateway (P-GW). The bearer can carry one or more service traffic flows (SDFs), and one or more SDFs carried on one EPS bearer have the same QoS. The EPS bearer is an end-to-end logical bearer between the UE and the P-GW. The EPS bearer establishes three-segment bearers on the three network interfaces that the LTE network structure passes through, including establishing the P-GW and the serving gateway (Serving). S5/S8bearer on the interface of the Gateway, S-GW), S1-bearer established on the interface between the S-GW and the base station (eNB), and a data radio bearer (Data Radio Bearer) established on the air interface between the eNB and the UE DRB), where S1-bearer and DRB are combined together and defined as an evolved Universal Terrestrial Radio Access Bearer (E-RAB) between the UE and the S-GW. The establishment of the EPS bearer and the transmission of which SDFs are mapped to which EPS bearer is transmitted, and the core network decides and controls. When the core network establishes an EPS bearer, it will notify the eNB of each E-RAB (ie, the EPS bearer is on the E-URTAN side). The QoS parameter, the eNB can only passively accept or reject. If accepted, the DRB between the UE and the UE is established on the air interface, and the data scheduling transmission is performed according to the received QoS parameters of the E-RAB level.

In the LTE system, the QoS policy and parameters, and the mapping relationship between the SDF and the bearer are completely controlled by the core network, and the base station can only passively accept or refuse to establish the DRB. In a wireless communication system, the wireless interface is the key to implementing and satisfying QoS. In the current QoS architecture, the base station cannot adjust the SDF mapped on each DRB according to the actual wireless load and the quality of the wireless link, so the most efficient execution cannot be performed. QoS. In addition, the core network and the access network are too coupled, and the modification of the core network will directly affect the access network, so that the access network also needs to be modified correspondingly, and the independent expansion or evolution of the core network and the access network cannot be realized.

In order to overcome the above defects in the 4G QoS architecture and realize the maximum decoupling design of the 5G core network and the access network, 3GPP proposes a flow-based QoS architecture in the 5G system design. In the flow-based QoS architecture, the bearer is removed between the core network and the radio access network, but the DRB is retained on the air interface. Figure 2 shows a schematic diagram of a flow-based QoS architecture. The 5G core network receives SDF (such as IP Flow) from a packet data network (such as the Internet), and maps the SDF into a QoS flow. For example, multiple SDFs with the same or similar QoS requirements are aggregated into one QoS Flow, or one SDF can be mapped into one QoS Flow. Here, the 5G core network generates a QoS rule according to the QoS policy of the core network, the QoS requirements of the SDF, and the subscription information of the user. And complete the mapping of SDF to QoS Flow. The QoS rule includes a QoS profile and a precedence order of the QoS feature parameter, and may further include a packet filter or a data service filter of the SDF using the QoS feature parameter. (traffic filter), where the QoS characteristic parameter may include a QoS ID for identifying or identifying the QoS characteristic parameter, and includes a Maximum Flow Bit Rate (MBR) and a Guaranteed Flow Bit Rate (GBR). ), at least one of a priority level, a Packet Delay Budget (PDB), a Packet Error Rate (PER), and an admission control (Admission control).

The 5G core network sends the QoS characteristic parameters in the QoS rule generated by the decision to the RAN through a control plane interface with the RAN (such as a 5G base station or an eLTE base station, etc.), and the 5G core network passes the QoS interface with the RAN. The Flow is sent to the RAN, so that the RAN maps the QoS Flow to the DRB, and performs subsequent data stream transmission based on the mapping relationship.

Summary of the invention

The present disclosure provides a data stream remapping method and apparatus, and a user equipment, a RAN device, which can implement remapping of a data stream on a DRB of an air interface in a flow-based QoS architecture.

The present disclosure provides a data stream remapping method, which may include:

The user equipment UE receives the data stream remapping information notified by the radio access network RAN device; the UE performs a data stream remapping operation according to the data stream remapping information.

The present disclosure also provides a data stream remapping apparatus, which may include:

And a receiving module, configured to receive data stream remapping information notified by the radio access network RAN device; and a remapping module configured to perform a data stream remapping operation according to the data stream remapping information.

The present disclosure also provides a user equipment, which may include one or more processors, a memory, and one or more programs, the one or more programs being stored in a memory, when executed by one or more processors, Perform the above method.

The present disclosure also provides a data stream remapping method, which may include:

The radio access network RAN device notifies the user equipment UE of the data stream remapping information; the RAN device performs a data stream remapping operation.

The notification module is configured to notify the user equipment UE data stream remapping information; the remapping module is configured to perform a data stream remapping operation.

The present disclosure also provides a radio access network RAN device, which may include one or more processors, a memory, and one or more programs, the one or more programs being stored in a memory when being processed by one or more processors When executed, perform the above method.

The present disclosure also provides a computer readable storage medium storing computer executable instructions for performing any of the methods described above.

The present disclosure also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, when the program instructions are executed by a computer, Having the computer perform any of the methods described above.

The present disclosure provides a data stream remapping method and apparatus, and a user equipment and a RAN device, which receive data stream remapping information notified by the RAN device by the UE, so that the UE performs a data stream remapping operation according to the data stream remapping information, which can implement The UE adjusts the mapping relationship between the data stream and the DRB used for transmitting the data stream to ensure the QoS of the data stream transmission and improve the user experience.

DRAWINGS

1 is a QoS architecture diagram of an LTE system;

2 is a flow-based QoS architecture diagram of a 5G system;

3 is a schematic diagram of QoS flow re-mapping between different DRBs in a flow-based QoS architecture according to an embodiment;

4 is a schematic diagram of a data receiving sequence of a receiving end after data stream remapping according to an embodiment;

FIG. 5 is a schematic flowchart of a data flow remapping method according to an embodiment; FIG.

FIG. 6 is a schematic flowchart diagram of another data stream remapping method according to an embodiment; FIG.

7 is a schematic diagram of a remapping field format 1 provided by an embodiment;

FIG. 8 is a schematic diagram of a remapping field format 2 provided by an embodiment; FIG.

9 is a schematic diagram of a remapping field format 3 provided by an embodiment;

FIG. 10 is a schematic diagram of a remapping field format 4 provided by an embodiment; FIG.

11 is a schematic diagram of a user plane processing process of a sender and a receiver when data stream remapping is provided in an embodiment;

FIG. 12 is a schematic structural diagram of a data stream remapping apparatus according to an embodiment; FIG.

FIG. 13 is a schematic structural diagram of another data stream remapping apparatus according to an embodiment; FIG.

FIG. 14 is a schematic structural diagram of hardware of a user equipment according to an embodiment; FIG.

FIG. 15 is a schematic structural diagram of hardware of a RAN device according to an embodiment.

detailed description

In this embodiment, the core network refers to a core network device that completes multiple functions of the 5G core network, such as an integrated core network device that implements all core network functions, or functions such as implementing mobility management functions and session management of the core network. A core network device consisting of multiple devices. The RAN refers to a RAN device that performs multiple functions of the 5G RAN, such as an integrated base station that performs all RAN functions, or a Base Band Unit (BBU) and a Radio Radio Unit (RRU). A common RAN device, or a RAN device composed of a central processing unit (CU) and a distributed processing unit (DU), the embodiment does not limit the specific core network device and the RAN device existence form. .

In the flow-based QoS architecture, the bearer is removed between the core network and the RAN, and the RAN combines the QoS characteristic parameters received from the core network or the QoS characteristic parameters received from the core network and the QoS ID in the data packet header. Determine the actual wireless load, wireless link quality and other factors, and establish a DRB. In the flow-based QoS architecture, after the core network generates the QoS rule, the QoS rule is sent to the user equipment UE. The QoS rule includes a QoS characteristic parameter and a priority of the QoS characteristic parameter, and may further include a packet filter or a data service filter using the QoS characteristic parameter. This embodiment is convenient for description, and is hereinafter collectively referred to as a packet filter. A shorthand is a PF packet filter. For example, a possible PF packet filter is Internet Protocol (IP) quintuple information including: source IP address, source port, destination IP address, destination port, and transport layer protocol.

The QoS flow may include at least one SDF. In this embodiment, to avoid ambiguity, a QoS flow including at least one SDF is referred to as a data flow. Each data stream has a corresponding QoS rule.

In the flow-based QoS architecture, after receiving the data packet from the core network for the downlink data transmission, the RAN determines to map the data packet according to the QoS ID in the data packet header and the QoS characteristic parameter corresponding to the QoS ID. Transfer on a DRB. For uplink data transmission, there are two ways to map data packets to DRB:

Method 1: Display signaling mapping

The RAN determines, according to the QoS characteristic parameter received from the core network, the RAN decision to map the data stream to which DRB, and notifies the UE of the mapping result of the data stream and the DRB.

Each data stream has a corresponding QoS rule, and the QoS rule includes a QoS characteristic parameter and a priority of the QoS characteristic parameter, and may further include a PF packet filter using the QoS characteristic parameter. Therefore, the notification method for notifying the UE can be:

If the QoS characteristic parameter information corresponding to the data flow can be identified by the QoS ID, the UE is notified of the QoS ID mapped on each DRB, that is, the QoS ID included in each DRB. When performing uplink data transmission, the UE matches the packet filter in the data packet received from the application layer (such as the IP layer) and the packet filter in the QoS rule received from the core network, and matches the packet corresponding to the packet. The QoS characteristic parameter, thereby determining the QoS ID, and then determining the DRB according to the determined QoS ID and the QoS ID mapped on each DRB received from the RAN side, and transmitting the data by using the determined DRB. or,

If the QoS characteristic parameter information corresponding to the data stream has a corresponding packet filter, the notification mode may also be: notifying the UE of the packet filter mapped on each DRB, that is, the packet filter included in each DRB. When performing uplink data transmission, the UE determines the DRB according to the packet filter in the data packet received from the application layer (such as the IP layer) and the packet filter mapped on each received DRB, and uses the determination. The DRB transmits data, wherein the UE may store the QoS ID information mapped on each DRB notified by the RAN or the packet filter information mapped on each DRB in the buffer of the UE.

Method 2: Reflective Mirror Mapping

The reflected mirror mapping can be used for services whose packet filters are not statically fixed, or for services that include many packet filters. For these services, the core network cannot send packet filters to the UE in the QoS rule (such as packet filtering). If the packet is not statically fixed, or the packet filter is sent to the UE in the QoS rule, a large amount of signaling overhead (such as a large number of packet filters) is introduced. In this manner, the UE may be notified by the control plane signaling or the user's breadhead to use the reflected mirrored uplink data.

When the QoS rule is sent to the user equipment UE by the control plane signaling, the core network indicates the uplink data sent by using the reflection mirror mapping by using the QoS rule. For example, the indication information may be in the QoS characteristic parameter in the QoS rule. For example, the indication information may also be a parameter of the QoS rule with the QoS characteristic parameter, the priority of the QoS characteristic parameter, and the PF filter. The UE receives the downlink data packet, matches the QoS characteristic parameter according to the QoS ID in the downlink data packet header, and finally matches the QoS rule. If the QoS rule indicates that the reflected mirror mapping is used, the UE saves the packet filter in the downlink data packet. Go to the QoS rule. When the UE has uplink data transmission, the UE matches the packet filter in the uplink data packet with the packet filter in the QoS rule, matches the QoS rule using the reflection mirror mapping, and uses the DRB that receives the downlink data packet. To send upstream data.

When notified by the user's breadhead, the core network or RAN indicates the uplink data transmitted using the reflected mirror map in the header of the downlink packet sent to the UE. The UE receives the downlink data packet, and matches the QoS characteristic parameter according to the QoS ID in the packet header of the downlink data packet and the QoS rule received from the core network, and Save the packet filter in the downstream packet to the QoS rule. When the UE has uplink data transmission, the UE matches the packet filter in the uplink data packet with the packet filter in the QoS rule, matches the QoS rule using the reflection mirror mapping, and uses the DRB that receives the downlink data packet. To send upstream data.

In a flow-based QoS architecture, the RAN decides how to establish a DRB and how to map packets onto each DRB. The QoS flow originally mapped to a DRB needs to be mapped to the QoS flow changed by the service, or the QoS rule determined by the core network decision, or the RAN radio channel condition, the radio load change, or the RAN decision change, or the RAN handover. Another DRB.

As shown in FIG. 3, it is an example of QoS flow re-mapping between different DRBs in a flow-based QoS architecture. QoS flow1 is originally mapped to DRB1, and data transmission is performed on DRB1. For at least one of the reasons listed above, QoS flow1 is remapped to DRB2 for transmission. This embodiment can implement remapping of QoS flows between DRBs, implement remapping of data flows between different DRBs, ensure QoS of data flows, and ensure user experience.

In the example shown in FIG. 3, when QoS flow1 is remapped from DRB1 to DRB2, the cache state of DRB1 for buffering application layer data packets, such as IP PDUs, is as shown in FIG. 3, where IP-PDU1 and IP-PDU3 has completed transmission on DRB1 and received acknowledgment information from the peer (UE) for successful reception, while IP-PDU2 has sent but has not received acknowledgment from the peer to successfully receive, and IP-PDU4 has not been sent. After QoS flow1 is remapped from DRB1 to DRB2, subsequent IP PDUs from QoS flow1 of the core network will be placed in the DRB2 cache, as shown in IP-PDU5 and IP-PDU6. The QoS flow remapping case shown in FIG. 3 can be applied to remapping within the same RAN device, and can also be used for remapping when switching from one RAN device to another when switching or multi-connection.

For remapping in the RAN device, although the remapping occurs in the same device, the logical channels used by different DRBs may have different scheduling priorities due to different scheduling policies, which may result in the receiving end receiving the data packet. When IP-PDU 5 and IP-PDU 6 transmitted by QoS flow1 on DRB2 may arrive first than the IP-PDU 2 and IP-PDU 4 legacy on DRB1, as shown in Figure 4, the order of receiving these packets is received by the receiving end. May be IP-PDU5, IP-PDU6, IP-PDU2 and IP-PDU4. For a connection-oriented, reliable transport layer communication protocol, such as the Transmission Control Protocol (TCP), the receiving end receives an out-of-order packet, which may cause the transmitting end to downgrade the transmission rate and affect the throughput. Affect QoS and the user's business experience.

For the case of handover or multiple connections, remapping occurs between different RAN devices. How to ensure that the QoS flow data in the remapping process is continuously and non-destructively transmitted, directly affecting QoS, affecting The user's business experience.

To implement remapping of data flows between different DRBs, ensure QoS of data flows, and ensure user experience, the following embodiments are described:

Embodiment 1

In the first embodiment, the UE data stream remapping information is notified by using control plane signaling on the air interface. As shown in FIG. 5, FIG. 5 is a flowchart of a data flow remapping method provided by Embodiment 1, and includes the following steps:

In step 510, the RAN makes a data flow remapping decision;

Taking the example shown in FIG. 3 as an example, before step 510, QoS flow1 and QoS flow2 are mapped to DRB1, QoS flow3 is mapped to DRB2, and QoS flow4 and QoS flow5 are mapped to DRB3. The RAN makes a data flow remapping decision and maps QoS flow1 from the original DRB1 to DRB2.

In step 520, the RAN informs the UE of the data stream remapping information by control plane signaling.

The UE receives the data stream remapping information that is notified by the RAN device, and enables the UE to perform the data stream remapping operation according to the data stream remapping information, so that the UE can adjust the data stream mapping relationship used for transmitting the data stream to ensure the data stream transmission. QoS to enhance the user experience.

For example, the RAN notifies the data flow remapping information by control plane signaling, which may be one of the following ways:

Manner 1: Instruct the UE to delete information of data flow information mapped to the DRB; where the data flow information may be identified by a QoS ID or a packet filter;

If the QoS characteristic parameter information corresponding to the data flow can be identified by the QoS ID, the remapping information is used to instruct the UE to delete the QoS ID mapped to the DRB. As shown in FIG. 3, if the QoS ID corresponding to QoS flow1 is QoS ID1, then in step 510, the RAN informs the UE to delete the mapped QoS ID1 from DRB1; or

If the QoS characteristic parameter information corresponding to the data flow has a corresponding packet filter (for example, the QoS rule includes a packet filter corresponding to the QoS characteristic parameter), the remapping information may be used to indicate that the UE deletes the mapping to the DRB. Packet filter on. Taking the example shown in FIG. 3 as an example, if the packet filters corresponding to QoS flow1 are PF1 and PF2, in this step, the RAN notifies the UE to delete the mapped PF1 and PF2 from DRB1.

For example, the data flow information is identified by a QoS ID. For example, QoS flow1 corresponds to QoS ID1. Before remapping, the UE side may store a mapping relationship between each DRB and data flow information. For example, the mapping relationship includes: mapping QoS ID1 on DRB1 and QoS ID2. RAN remapping decision maps QoS flow1 On the DRB2, the UE is notified by the data stream remapping information, so that the UE deletes the QoS ID1 in the mapping relationship between the DRB1 and the QoS ID, and adds the QoS ID1 in the mapping relationship between the DRB2 and the QoS ID.

The mode 1 is applicable to the case where the DRB is used for downlink transmission. When the downlink transmission is performed, the RAN clearly knows the mapping relationship between each QoS flow and the DRB. Therefore, the UE only needs to notify the UE to delete the mapped QoS flow information from the DRB. Used when the UE side performs user plane data stream remapping processing.

Manner 2: Instruct the UE to update information that is mapped to data flow information on the DRB.

If the QoS characteristic parameter information corresponding to the data flow can be identified by the QoS ID, the UE is instructed to update the mapped data flow information to update the QoS ID mapped to the DRB. Taking the example shown in FIG. 3 as an example, if the QoS IDs corresponding to QoS flow 1 to QoS flow 5 are QoS ID 1 to QoS ID 5, the data flow information mapped to the DRB in this step may be:

DRB1: QoS ID2,

DRB2: QoS ID1, QoS ID3,

DRB3: QoS ID4, QoSID5,

Alternatively, if the QoS characteristic parameter information corresponding to the data stream includes a corresponding packet filter, the updated data stream information may also be an update to the packet filter on the DRB. Taking the example shown in Figure 3 as an example, if the packet filters corresponding to QoS flow1 are PF1 and PF2, the packet filters corresponding to QoS flow2 are PF3, PF4, and PF5, and QoS flow3, QoS flow4, and QoS flow5 respectively correspond to the packets. The filters PF6, PF7, and PF8 update the data stream information mapped to the DRB.

DRB1: PF3, PF4, PF5,

DRB2: PF1, PF2, PF6,

DRB3: PF7, PF8.

For example, the UE side may store the data flow information mapped on each DRB before the remapping, and the RAN notifies the UE data flow remapping information through the control plane signaling, so that the UE may delete or update the UE side storage according to the data flow remapping information. The data stream information mapped on the adjusted DRB may also be updated with the data stream information mapped on all DRBs. For example, the UE maps all DRBs stored on the UE side according to the data stream remapping information notified by the RAN. The data stream information is replaced as a whole.

The second mode is applicable to the case where the DRB is used for downlink and/or uplink data transmission, and the notification information is used when the UE side performs user plane data stream remapping processing.

Embodiment 2

In the second embodiment, the packet header information of the user plane data packet on the air interface is used to notify the UE that the data stream is heavy. Map information. As shown in FIG. 6, FIG. 6 is a flowchart of a data stream remapping method used in Embodiment 2, including the following steps:

In step 610, the RAN makes a data flow remapping decision;

This step is the same as the description of step 510 above.

In step 620, the RAN informs the UE of the data stream remapping information by the header information of the user plane data packet.

For example, a remap-infor field is added in the header of the user plane data packet, and the field is used to notify the receiving end whether the data packet is remapped. The remapping fields can have different formats and can be any of the following formats:

Format 1: The remapping field may include a Remap Exist (RE) bit (ie, a first indication bit) and a Remap Information (RMI) bit (ie, a first remapping information bit).

As shown in FIG. 7, the remapping field includes a remapping information presence indication (RE) bit and a remapping information (RMI) bit, and the RE and the RMI each occupy one bit. among them:

RE: indicates the presence or absence of the RMI. For example, a value of 1 for the RE indicates that the RMI exists, and a value of 0 indicates that the RMI does not exist.

RMI: Indicates whether the data stream is remapped. For example, an RMI value of 1 indicates that the data stream is remapped, and a value of 0 indicates that the data stream is not remapped.

Taking the example shown in FIG. 3 as an example, QoS flow1 is remapped from DRB1 to DRB2. In a period of time after QoS flow1 is remapped to DRB2, RE= can be set in the header of the QoS flow1 packet sent on DRB2. 1. RMI=1; or after QoS flow1 is remapped to DRB2, set RE=1 and RMI=1 to the header of the specified packet on QoS flow1 sent on DRB2. Among them, "a period of time" and "designated data packet" will be explained in the subsequent embodiments. For QoS flow 2 to QoS flow 3, since no remapping is performed, the REs in the header of these packets are set to zero.

Format 2: The remapping field may include a remapping information presence indication (RE) bit (ie, a second indication bit) and a remapping DRB information (RM-DRB) (ie, a first remapping DRB information);

As shown in FIG. 8, the remapping field may include an RE and an RM-DRB, where the RE occupies one bit, and how many bits the RM-DRB occupies depends on the length of the DRM identifier (DRB-ID), for example, the length of the DRB-ID in the LTE is 5bit, but the length of the DRB-ID in 5G may be larger than 5bit.

RE: indicates the presence or absence of RM-DRB. For example, a value of 1 for the RE indicates that RM-DRB exists, and a value of 0 indicates that RM-DRB does not exist.

RM-DRB: Information indicating the source DRB when the data stream is remapped, that is, information indicating that the data stream is remapped to the source DRB before the current DRB, wherein the information of the DRB may be a DRB-ID.

Taking the example shown in FIG. 3 as an example, QoS flow1 is remapped from DRB1 to DRB2, assuming that the DRB-ID of DRB1 is 1, and the DRB-ID of DRB2 is 2, and the QoS flow1 is remapped to DRB2 for a period of time. You can set RE=I, RM-DRB=1 in the packet header of the QoS flow1 packet sent on DRB2 (or 00001 if RM-DRB is 5 bits); or remapping to DRB2 in QoS flow1 Then, RE=1 and RM-DRB=1 are set in the header of the specified packet on the QoS flow1 transmitted on the DRB2. Among them, "a period of time" and "designated data packet" will be explained in the subsequent embodiments. For QoS flow 2 to QoS flow 3, since no remapping is performed, the REs in the header of these packets are set to zero.

Format 3: The remapping field may include a Remapping Information Bit (RMI) (ie, a second remapping information bit), and the remapping information bit may be used to indicate whether the data stream is remapped;

As shown in FIG. 9, with respect to format 1, the RMI of format 3 always exists to indicate whether the data stream is remapped. For example, a value of 1 for RMI indicates that the data stream is remapped, and a value of 0 indicates that the data stream is not heavy. Mapping

Taking the example shown in FIG. 3 as an example, QoS flow1 is remapped from DRB1 to DRB2, and RMI= can be set in the header of the QoS flow1 packet sent on DRB2 for a period of time after QoS flow1 is remapped to DRB2. 1; or after QoS flow1 is remapped to DRB2, RMI=1 is set in the header of the specified packet on QoS flow1 sent on DRB2. Among them, "a period of time" and "designated data packet" will be explained in the subsequent embodiments. For QoS flow 2 to QoS flow 3, since no remapping is performed, the RMI in these packet headers is set to zero.

Format 4: The remapping field may include remapping DRB information (RM-DRB) (ie, second remapping DRB information), and the remapping DRB information may be used to indicate information of the source DRB when the data stream is remapped;

As shown in FIG. 10, with respect to format 2, the RM-DRB of format 4 is always present, indicating information of the source DRB when the data stream is remapped, that is, the data stream is remapped to the source DRB before the current DRB. information. Taking the example shown in FIG. 3 as an example, QoS flow1 is remapped from DRB1 to DRB2, assuming that the DRB-ID of DRB1 is 1, and the DRB-ID of DRB2 is 2, and the QoS flow1 is remapped to DRB2 for a period of time. RM-DRB=1 can be set in the header of the QoS flow1 packet sent on DRB2 (or 00001 if RM-DRB is 5 bits); or after QoS flow1 is remapped to DRB2, In the header of the specified packet on QoS flow1 sent on DRB2 Set RM-DRB=1. Among them, "a period of time" and "designated data packet" will be explained in the subsequent embodiments. For QoS flow 2 to QoS flow 5, since remapping is not performed, the RM-DRB in these packet headers is set to the DRB ID of the current RM-DRB. For example, if QoS flow 3 is always transmitted on DRB2, QoS flow 3 is always set. RM-DRB is DRB2.

It is also possible to notify the receiving end of the data stream remapping information by using at least one of the above four formats. For example, the remapping field is set in the header of the QoS flow1 packet sent on the DRB2 or in the header of the specified packet on the QoS flow1, so that the notification receiving end data stream QoS flow1 is remapped from DRB1 to DRB2.

For example, the RAN sets a remapping field according to the format 1 or the format 3 in the header of the downlink data packet sent to the UE. After receiving the downlink data packet including the remapping field, the eNB may determine that the downlink data packet is heavy. The mapped data packet is further transmitted according to the mapping manner of the data packet, such as the reflection mirror mapping mode, by using the DRB that receives the downlink data packet to transmit the corresponding uplink data.

For example, the RAN sets a remapping field according to the format 2 or the format 4 in the header of the downlink data packet sent to the UE. After receiving the downlink data packet including the remapping field, the eNB may determine that the downlink data packet is Re-mapping the data packet, and obtaining information that the data stream is re-mapped to the source DRB before the current DRB, and may be based on the remapping field if the UE side receives the duplicate data packet from the source DRB and the current DRB. Perform subsequent operations to drop packets, and so on.

In all the examples of FIG. 7 to FIG. 10, the packet header length of the data packet is determined according to the actual application of the 5G system. The figure is exemplified by two bytes, which is only an example. The embodiment does not limit the actual data. The length of the packet header. In addition, the location of all remapping fields in the packet header of the packet is also an example, and does not limit the location of the remapping field actually in the packet header.

The user plane protocol stack on the 5G radio interface can adopt the protocol stack architecture on the LTE radio interface, and can include Medium Access Control (MAC) and Radio Link Control (RLC) from bottom to top. The protocol layer such as the Packet Data Convergence Protocol (PDCP) may be modified based on the LTE radio interface protocol stack. For example, a new protocol layer is added on the PDCP. This embodiment can be called It is the L2-new protocol layer.

A remapping field is added to the header of the user plane data packet, where the header of the user plane data packet may refer to a header of a PDCP PDU generated by the PDCP, or may be a header of a PDU generated by L2-new.

The manner in which the UE data stream remapping is notified by the packet header information of the user plane data packet can be applied to The case where the DRB is used for downlink and/or uplink transmission, and the notification information is used when the UE side performs the user plane data stream remapping process, for example, in the case of informing the UE to use the reflected mirror mapping manner to perform the uplink data flow and the DRB mapping relationship. ,.

Taking the example shown in Figure 3 as an example, QoS flow1 is remapped from DRB1 to DRB2. During a period of time, there may be packets left on QoS flow1 on DRB1, such as IP-PDU2 and IP-PDU4 in Figure 3. On the DRB2, the new data packet on the QoS flow1 is started to be transmitted, for example, the IP-PDU5 and the IP-PDU6 in the figure. For the transmission of the uplink data stream and the DRB mapping by using the reflection mirror mapping mode, the UE can receive the DRB1 and the DRB1. The data packet of the QoS flow1 of the DRB2 is such that the UE cannot determine which DRB the uplink data packet is mapped to. According to the method of this embodiment, after the UE receives the data packet including the remapping field from the DRB2, the remapping can be performed according to the remapping. If the setting of the field determines that QoS flow1 has been mapped from DRB1 to DRB2, the downlink data packet received on DRB2 is used to reflect the transmission of the uplink data packet, that is, the uplink data packet is mapped to the DRB2 for transmission.

Embodiment 3

Based on the data stream remapping method of the first embodiment and the second embodiment, the third embodiment provides a processing process of the user plane when the data stream is remapped. Taking QoS flow1 from DRB1 to DRB2 as shown in Figure 3, Figure 11 shows the processing of the user plane when the data stream is remapped between the sender and the receiver.

Sending end:

The sender sequentially migrates the legacy packet of QoS flow1 in the transmission buffer of DRB1 (source DRB) to the buffer of the transmission (target DRB) of DRB2. If the sending end is the UE, the sending buffer of the source DRB and the sending buffer of the target DRB are both caches of the UE side. If the sending end is the RAN, the sending buffer of the source DRB and the sending buffer of the target DRB are both RAN side. Cache. Here, the legacy data packet of the QoS flow1 in the transmission buffer of the DRB1 refers to all the data packets starting from the first data packet that has not been successfully received by the receiving end in the transmission buffer of the source DRB. That is, including in the transmission buffer of the source DRB, starting from the first data packet that has not been successfully received by the receiving end, including the first data packet that has not been successfully received by the receiving end. A packet that has been sent but has not been acknowledged successfully by the receiving end, and a packet that has not yet been sent. These packets may be packets of QoS flow1 from the application layer (such as the IP layer), such as IP PDUs. According to the design of the radio interface user plane protocol, if the 5G user plane protocol follows the LTE protocol stack architecture, including MAC, RLC and PDCP, these data packets may be Service Data Units (PDCP SDUs), if 5G The user plane protocol has been redesigned to include L2-new on top of PDCP. At the protocol layer, these packets can be L2-new SDUs.

Taking the example shown in FIG. 3 as an example, the data packet migrated from the transmission buffer of DRB1 to the transmission buffer of DRB2 may include IP-PDU2 and IP-PDU4. After the migration, the transmission buffer of DRB2 is as shown in FIG. IP-PDU2 and IP-PDU4 migrated from DRB1, and new data IP-PDU5 and IP-PDU6 on QoS flow1 on DRB2. When data is transmitted on DRB2, packets migrated from DRB1 are preferentially transmitted.

For example, the data packet that is migrated from the transmission buffer of the DRB1 to the transmission buffer of the DRB2 can be placed in front of the buffer queue, and the data packet migrated from the DRB1 is preferentially transmitted according to the principle of the advanced buffer. The data packet migrated from the transmission buffer of the DRB1 to the transmission buffer of the DRB2 may be identified, and the identified data packet may be preferentially transmitted, so that when the data is transmitted on the DRB2, the data packet migrated from the DRB1 is preferentially transmitted.

When the sending end sets the sending buffer of each DRB, the sending end can store all the QoS flow data packets in the same cache, but the transmitting end can identify the data packets of different QoS flows in the same cache; or the sending end can also be Each DRB sets multiple transmit buffers, and packets of different QoS flows are stored in different caches. Both of the above implementations ensure that when the data stream is remapped from one DRB to another, the sender can identify the legacy data packet in the source DRB's transmit buffer and migrate to the destination DRB's transmit buffer. in. The above two cache design modes are merely exemplary descriptions, and the embodiment does not limit the implementation manner of the actual products.

For the case of the downlink data transmission, the foregoing transmitting end is the RAN. After the RAN makes a data flow remapping decision based on the first embodiment or the second embodiment, or after the RAN notifies the UE data stream remapping information through the control plane signaling, the RAN may Perform the above packet migration process.

For the case of the uplink data transmission, the transmitting end here is the UE. After receiving the data stream remapping information from the RAN, the UE may perform the above data packet migration process based on the first embodiment or the second embodiment. Here, the UE receives the data stream remapping information through the control plane signaling; or, when the mapping between the uplink data stream and the DRB adopts the reflection mirror mapping mode, the UE may receive the downlink data packet on the target DRB, according to The remapping field in the header of the downlink data packet learns the data stream remapping information.

In this embodiment, the QoS flow1 is remapped from the DRB1 to the DRB2, and the remapping field in the data packet header is set according to the method in the second embodiment for a period of time when the transmitting end starts to send the data packet of the QoS flow1 on the DRB2. . The period of time here can be determined by the sender. For example, the sender can judge that the legacy data packet of QoS flow1 on DRB1 has been sent, or send When the data packet of the QoS flow1 is started to be sent on the DRB2, the remapping field in the data packet header is set according to the method described in Embodiment 2, and the "specified data packet" can be determined by the transmitting end. For example, it can be a legacy packet migrated from DRB1.

When the sender is the RAN, the user plane processing of the above sender is applicable to the remapping of the data stream in the same RAN device, and can also be used when switching from one RAN device to another when switching or multi-connection. Mapping, for the latter, the packet migration process can be done through an interface between the source RAN device and the target RAN device.

Receiving end:

In this embodiment, the receiving end may not perform any special processing. As shown in FIG. 11, the receiving end may choose to discard the data packet of QoS flow1 received from DRB1 (source DRB).

For the case of the downlink data transmission, the receiving end may be the UE. After receiving the data stream remapping information from the RAN, the UE performs the discarding operation according to the first embodiment or the second embodiment. Receiving, by the UE, the data stream remapping information by using control plane signaling; or, the UE receives the downlink data packet on the target DRB, where the remapping field in the packet header of the downlink data packet indicates the data stream remapping information .

For the case of uplink data transmission, the receiving end may be a RAN. After the RAN makes a data flow remapping decision based on the first embodiment or the second embodiment, or the RAN receives an uplink data packet on the target DRB, the uplink data packet The remapping field in the header indicates the data stream remapping information.

Embodiment 4

FIG. 12 is a schematic diagram of a data stream remapping apparatus according to an embodiment of the present invention. As shown in FIG. 12, a data stream remapping apparatus 120 of this embodiment may include:

The receiving module 121 is configured to receive data flow remapping information notified by the radio access network RAN device;

The remapping module 122 is configured to perform a data stream remapping operation based on the data stream remapping information.

The data stream remapping apparatus 120 of this embodiment can implement remapping of data streams between different DRBs, can ensure QoS of data streams, and improve user experience.

Optionally, the receiving module 121 is configured to receive data stream remapping information that is sent by the RAN device by using a control plane signaling, where the data stream remapping information is one of: indicating that the UE deletes the mapping to the DRB. Information of the data stream information; instructing the UE to update information mapped to data stream information on the DRB; the data stream information may be identified by a quality of service identifier QoS ID or a packet filter.

Optionally, when the data flow information is identified by the QoS ID, deleting the mapped data flow information from the DRB is deleting the QoS ID mapped to the DRB, and the updated mapped data flow information is updated to be mapped to the DRB. QoS ID;

When the data stream information is identified by a packet filter, the data stream information of the deleted mapping is deleted to be mapped to a packet filter on the DRB, and the updated data stream information of the mapping is updated to a packet filter mapped to the DRB. .

Optionally, the receiving module 121 is configured to receive data stream remapping information that is notified by the RAN device by a packet header of the user plane data packet; the data stream remapping information is included in a remapping field of a packet header of the data packet. in.

Optionally, the remapping field includes any one of the following formats: format 1: the remapping field includes a first indication bit and a first remapping information bit, where the first indication bit is used to indicate the first Whether a remapping information bit exists; the first remapping information bit is used to indicate whether the data stream is remapping; and the format 2: the remapping field includes a second indication bit and a first remapping DRB information, where The second indication bit is used to indicate whether the first remapping DRB information exists; the first remapping DRB information is used to indicate information of a source DRB when the data stream is remapped; format 3: the remapping field A second remapping information bit is included, the second remapping information bit is used to indicate whether the data stream is remapped; format 4: the remapping field includes second remapping DRB information, and the second remapping DRB information Information indicating the source DRB when the data stream is remapped.

Optionally, the remapping module 122 is further configured to: sequentially migrate the legacy data packet in the transmit buffer of the source DRB to the transmit buffer of the target DRB, where the source DRB is the The remapped data stream is remapped to the DRB, the target DRB is the DRB after the remapped data stream is remapped, and the remapped data stream is remapped from the source DRB The target DRB.

The legacy data packet in the sending buffer of the source DRB includes:

In the transmission buffer of the source DRB, all data packets starting from the first data packet that has not been successfully received by the RAN device are confirmed. Optionally, the remapping module 122 is further configured to: when the UE sends the data packet of the remapping data stream on the target DRB, the data packet in the remapping data stream is specified. Setting a data stream remapping field in the header of the packet; or, when the UE sends the data packet of the remapping data stream on the target DRB, setting the data stream remapping field in a packet header of the specified data packet

Optionally, the specified time period and the specified data packet are used by the data stream remapping device 120 Determine by yourself.

Optionally, the remapping module 122 is further configured to: when the UE transmits an uplink data packet of the data flow by using a reflective mirror mapping manner, the UE receives a downlink data packet of the data flow on the target DRB, and the When the data stream remapping information is included in the header of the downlink data packet, the UE maps the uplink data packet of the data stream to the target DRB that receives the downlink data packet.

Optionally, the remapping module 122 is further configured to: discard the data packet of the remapping data stream received from the source DRB, where the source DRB is a DRB before the data stream is remapped, The remapping data stream is remapped from the source DRB to the target DRB.

As shown in FIG. 14, the embodiment further provides a user equipment, which may include a memory 1420 and one or more processors 1410. One processor 1410 is taken as an example in FIG. among them,

The memory 1420 stores the following instructions: receiving data stream remapping information notified by the radio access network RAN device, and performing a data stream remapping operation according to the data stream remapping information;

The processor 1410 is configured to execute the instructions stored by the memory.

When the instructions stored in the memory 1420 are executed by the one or more processors 1410, the following operations may also be performed:

Optionally, the data stream remapping information that is notified by the RAN device by the control plane signaling is received, where the data stream remapping information is one of: indicating that the UE deletes information that is mapped to the data stream information on the DRB. Instructing the UE to update information mapped to data flow information on the DRB.

The data flow information is identified by a QoS ID or a packet filter.

When the data flow information is identified by the QoS ID, the deleting the data flow information mapped to the DRB is deleting the QoS ID mapped to the DRB, and the update is mapped to the data on the DRB. The flow information is an update mapping to a QoS ID on the DRB;

When the data flow information is identified by the packet filter, the deleting the data flow information mapped to the DRB is deleting a packet filter mapped to the DRB, and the update is mapped to the DRB. The data stream information is updated to the packet filter on the DRB.

Optionally, the data stream remapping information is received by the RAN device through a packet header of the user plane data packet; wherein the data stream remapping information is included in a remapping field of a packet header of the user plane data packet.

The remapping field includes any one of the following formats: format 1: the remapping field includes a first indicator bit and a first remapping information bit, where the first indicator bit is used to indicate the first weight Whether the mapping information bit exists; the first remapping information bit is used to indicate whether the data stream is Re-mapping; format 2: the remapping field includes a second indication bit and a first remapping DRB information, where the second indication bit is used to indicate whether the first remapping DRB information exists; The remapping DRB information is used to indicate information of the source DRB when the data stream is remapped; format 3: the remapping field includes a second remapping information bit, and the second remapping information bit is used to indicate whether the data stream is Remapping; Format 4: The remapping field includes second remapping DRB information, and the second remapping DRB information is used to indicate information of the source DRB when the data stream is remapping.

Optionally, performing a data stream remapping operation according to the data stream remapping information, including: sequentially migrating the remapping data stream in a sending buffer of the source DRB to a sending buffer of the target DRB, where The source DRB is a DRB before the remapping data stream is remapped, and the target DRB is a DRB after the remapping data stream is remapped, and the remapping data stream is from The source DRB is remapped to the target DRB

The legacy data packet in the sending buffer of the source DRB includes:

In the transmission buffer of the source DRB, all data packets starting from the first data packet that has not been successfully received by the RAN device are confirmed.

Optionally, the performing a data stream remapping operation according to the data stream remapping information, further comprising: transmitting, during the specified time period of the data packet of the remapping data stream on the target DRB, in the Setting a data stream remapping field in a header of the data packet of the remapped data stream; or setting the data packet in the header of the specified data packet when transmitting the data packet of the remapping data stream on the target DRB Data stream remapping fields. The specified time period and the specified data packet are determined by the user equipment

Optionally, the performing the data stream remapping operation according to the data stream remapping information further includes: when the reflected image mapping manner transmits the uplink data packet of the data stream, the UE receives the data stream on the target DRB. When the downlink data packet includes the data flow remapping information in the header of the downlink data packet, the UE maps an uplink data packet of the data flow to the target DRB that receives the downlink data packet. on

Optionally, the performing the data stream remapping operation according to the data stream remapping information further includes: discarding the data packet of the remapping data stream received from the source DRB, where the source DRB is the The data stream is remapped to the previous DRB, and the remapping data stream is remapped from the source DRB to the target DRB.

As shown in FIG. 14, the user equipment may further include: an input device 1430 and an output device 1440.

The processor 1410, the memory 1420, the input device 1430, and the output device 1440 in the electronic device may be connected by a bus or other means, and the bus connection is taken as an example in FIG.

Input device 1430 can receive input numeric or character information, and output device 1440 can include a display device such as a display screen.

The memory 1420 is a computer readable storage medium that can be used to store software programs, computer executable programs, and modules. The processor 1410 performs various functional applications and data processing by executing software programs, instructions, and modules stored in the memory 1420 to implement any of the above-described embodiments. Input device 1430 can be used to receive input numeric or character information and to generate key signal inputs related to user settings and function controls of the electronic device. The output device 1440 can include a display device such as a display screen. The electronic device of the present embodiment may also include a communication device 1450 for transmitting and/or receiving information over a communication network.

Embodiment 5

FIG. 13 is a schematic diagram of a data stream remapping apparatus according to the embodiment. As shown in FIG. 13, the data stream remapping apparatus 130 of this embodiment includes:

The notification module 131 is configured to notify the user equipment UE of data stream remapping information;

The remapping module 132 is configured to perform a data stream remapping operation.

The data stream remapping apparatus 130 of this embodiment can implement remapping of data streams between different DRBs, ensure QoS of data streams, and improve user experience.

Optionally, the notification module 131 is configured to notify the UE of the data flow remapping information by using control plane signaling, where the data flow remapping information is one of: indicating that the UE deletes the mapping to the Information about data flow information on the DRB; indicating that the UE updates information mapped to data flow information on the DRB. The data flow information is identified by a quality of service identifier QoS label or a packet filter.

Optionally, when the data flow information is identified by the QoS ID, the deleting the data flow information mapped to the DRB is a QoS ID mapped from the deletion to the DRB; the update is mapped to the DRB The data stream information on the update is mapped to the QoS ID on the DRB;

When the data stream information is identified by a packet filter, the deleting the data stream information mapped to the DRB is deleting a packet filter mapped to the DRB; and the updating is mapped to the data on the DRB. The flow information is an update mapping to a packet filter on the DRB.

Optionally, the notification module 131 is configured to notify the UE of the data stream remapping information by using a packet header of the user plane data packet, where the data stream remapping information is included in a remapping of a packet header of the data packet. In the field.

Optionally, the remapping field includes any one of the following formats: format 1: the remapping field includes a first indication bit and a first remapping information bit, where the first indication bit is used to indicate the first Whether a remapping information bit exists; the first remapping information bit is used to indicate whether the data stream is remapping; and the format 2: the remapping field includes a second indication bit and a first remapping DRB information, wherein the The second indicator bit is used to indicate whether the first remapping DRB information exists; the first remapping DRB information is used to indicate information of a source DRB when the data stream is remapping; and the format 3: the remapping field includes Binding information bits, the second remapping information bits are used to indicate whether the data stream is remapped; format 4: the remapping field includes second remapping DRB information, and the second remapping DRB information is used Information indicating the source DRB when the data stream is remapped.

Optionally, the remapping module 132 is configured to sequentially migrate the legacy data packet in the transmit buffer of the source DRB to the transmit buffer of the target DRB, where the source DRB is the The mapped data stream is remapped to the DRB, the target DRB is the DRB after the remapped data stream is remapped, and the remapped data stream is remapped from the source DRB to the Target DRB.

The legacy data packet in the transmission buffer of the source DRB includes: in the transmission buffer of the source DRB, all data packets starting from the first data packet that has not been successfully received by the UE.

Optionally, if the sending buffer of the source DRB and the sending buffer of the target DRB belong to different RAN devices, the data packet migration operation may be transmitted through an interface between the different RAN devices.

Optionally, the remapping module 132 is further configured to: in the specified time period of sending the data packet of the remapping data stream on the target DRB, in a packet header of the data packet of the remapping data stream Setting a data stream remap field; or, when transmitting the data packet of the remapping data stream on the target DRB, setting the data stream remapping in a header of the specified data packet of the remapping data stream Field.

Optionally, the specified time period and the specified data packet are determined by the data stream remapping device 130.

Optionally, the remapping module 132 is further configured to: discard the data packet of the remapping data stream received from the source DRB, wherein the source DRB is a DRB before the data stream is remapped, the The remapping data stream is remapped from the source DRB to the target DRB.

As shown in FIG. 15, the embodiment further provides a RAN device, which may include: a memory 1520. And one or more processors 1510, one processor 1510 is taken as an example in FIG. among them,

The memory 1520 stores the following instructions: notifying the user equipment UE data stream remapping information; performing a data stream remapping operation;

The processor 1510 is configured to execute the instruction stored by the memory.

When the instructions stored in the memory 1520 are executed by the one or more processors 1510, the following operations may also be performed:

Optionally, when the data flow re-mapping information is notified by the control plane, the data flow remapping information is one of: instructing the UE to delete data flow information mapped to the DRB. Information indicating that the UE updates information mapped to data flow information on the DRB.

The data flow information is identified by a QoS ID or a packet filter.

When the data flow information is identified by the QoS ID, the data flow information mapped to the DRB is a QoS ID mapped from the delete to the DRB; and the update is mapped to the data flow on the DRB. The information is an update mapped to the QoS ID on the DRB; when the data flow information is identified by the packet filter, the deleting the data flow information mapped to the DRB is deleting the packet filter mapped to the DRB The update maps the data stream information mapped to the DRB to a packet filter that is mapped to the DRB.

Optionally, when the data stream remapping information is notified by the UE of the user plane data packet, the data stream remapping information is included in a remapping field of a packet header of the data packet.

The remapping field includes any one of the following formats: format 1: the remapping field includes a first indicator bit and a first remapping information bit, where the first indicator bit is used to indicate the first weight Whether the mapping information bit exists; the first remapping information bit is used to indicate whether the data stream is remapped; the format 2: the remapping field includes a second indication bit and a first remapping DRB information, wherein the second indication a bit is used to indicate whether the first remapping DRB information exists; the first remapping DRB information is used to indicate information of a source DRB when the data stream is remapping; and format 3: the remapping field includes a second weight Mapping information bits, the second remapping information bit is used to indicate whether the data stream is remapped; format 4: the remapping field includes second remapping DRB information, and the second remapping DRB information is used to indicate data The information of the source DRB when the stream is remapped.

Optionally, the performing a data stream remapping operation includes: sequentially migrating the legacy data packet in the sending buffer of the source DRB to the sending buffer of the target DRB, where the source is a DRB is a DRB before the remapping data stream is remapped, the target DRB is a DRB after the remapping data stream is remapped, and the remapping data stream is from the source The DRB is remapped to the target DRB.

Optionally, the legacy data packet in the sending buffer of the source DRB includes: in the sending buffer of the source DRB, all the data packets starting from the first data packet that has not been successfully received by the UE. .

The data packet migration operation may be performed by using an interface between the different RAN devices, if the transmission buffer of the source DRB and the transmission buffer of the target DRB belong to different RAN devices.

Optionally, the performing a data stream remapping operation further includes: transmitting, at the target DRB, a data packet of the remapping data stream within a specified time period of sending the data packet of the remapping data stream Setting a data stream recasting field in the header of the packet; or, when transmitting the data packet of the remapping data stream on the target DRB, setting the data in a header of the specified data packet of the remapping data stream Flow remaps the field.

Optionally, the performing a data stream remapping operation further includes: discarding a data packet of the remapping data stream received from the source DRB, where the source DRB is a DRB before the data stream is remapped. The remapping data stream is remapped from the source DRB to the target DRB.

As shown in FIG. 15, the RAN device may further include a communications interface 1530 and a bus 1540.

The processor 1510, the memory 1520, and the communication interface 1530 can complete communication with each other through the bus 1540. Communication interface 1530 can be used for information transfer. The processor 1510 can call the logic instructions in the memory 1520 to perform any of the methods of the above embodiments.

When the logic instructions in the memory 1420 and the memory 1520 in the above embodiments can all be implemented in the form of software functional units and sold or used as separate products, the logic instructions can be stored in a computer readable storage medium. The technical content of this embodiment may be embodied in the form of a computer software product, which may be stored in a storage medium, and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) Performing all or part of the steps of the method described in this embodiment.

Optionally, in the foregoing embodiment, the non-transitory storage medium may be a temporary storage medium, and the non-transitory storage medium may include, but not limited to, a USB flash drive and a read-only memory (ROM). Any medium that can store program code, such as random access memory (RAM), mobile hard disk, disk, or optical disk.

The solution of this embodiment can implement a flow-based QoS architecture, and how to connect the data stream in the air. Transmission on the interface, especially how the data stream is remapped on the DRB of the air interface.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments, and details are not described herein again.

All or part of the above steps may be performed by a program to instruct related hardware (eg, a processor), which may be stored in a computer readable storage medium such as a read only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, being executed by a processor and stored in a memory. Programs/instructions to implement their respective functions. The present disclosure is not limited to any specific form of combination of hardware and software.

Claims

A data stream remapping method includes:

The user equipment UE receives the data stream remapping information notified by the radio access network RAN device;

The UE performs a data stream remapping operation according to the data stream remapping information.
The method according to claim 1, wherein the receiving, by the UE, the data flow remapping information notified by the RAN device comprises:

Receiving, by the UE, data stream remapping information that is notified by the RAN device by using control plane signaling;

The data stream remapping information is one of the following:

Instructing the UE to delete information mapped to data flow information on the data radio bearer DRB;

Instructing the UE to update information mapped to data flow information on the DRB.
The method of claim 2, wherein

The data flow information is identified by a quality of service identifier QoS ID or a packet filter;

When the data flow information is identified by the QoS ID, the deleting the data flow information mapped to the DRB is deleting the QoS ID mapped to the DRB, and the update is mapped to the data on the DRB. The flow information is an update mapping to a QoS ID on the DRB;

When the data flow information is identified by the packet filter, the deleting the data flow information mapped to the DRB is deleting a packet filter mapped to the DRB, and the update is mapped to the DRB. The data stream information is updated to the packet filter on the DRB.
The method according to claim 1, wherein the receiving, by the user equipment UE, the data stream remapping information notified by the radio access network RAN device comprises: receiving, by the UE, the data notified by the RAN device by the header of the user plane data packet Flow re-mapping information; wherein the data stream remapping information is included in a remapping field of a header of the user plane data packet.
The method of claim 4 wherein the remapping field comprises one of the following formats:

The remapping field includes a first indicator bit and a first remapping information bit, where the first indicator bit is used to indicate whether the first remapping information bit exists; the first remapping information bit is used to Indicate whether the data stream is remapped;

The remapping field includes a second indication bit and a first remapping DRB information, where the second indication bit is used to indicate whether the first remapping DRB information exists; the first remapping DRB information is used Information indicating the source DRB when the data stream is remapped;

The remapping field includes a second remapping information bit, and the second remapping information bit is used to indicate whether the data stream is remapped;

The remapping field includes second remapping DRB information, and the second remapping DRB information is used Information indicating the source DRB when the data stream is remapped.
The method according to any one of claims 1 to 5, wherein the UE performs a data stream remapping operation according to the data stream remapping information, including:

Transmitting, by the UE, the legacy data packet in the transmit buffer of the source DRB to the transmit buffer of the target DRB;

The source DRB is a DRB before the remapping data stream is remapped, and the target DRB is a DRB after the remapping data stream is remapped, the remapping data stream Redirecting from the source DRB to the target DRB;

The legacy data packet in the sending buffer of the source DRB includes:

In the transmission buffer of the source DRB, all data packets starting from the first data packet that has not been successfully received by the RAN device are confirmed.
The method according to claim 6, wherein the UE performs a data stream remapping operation according to the data stream remapping information, and further includes:

Setting, by the UE, a data stream remapping field in a packet header of the data packet of the remapping data stream within a specified time period of sending the data packet of the remapping data stream on the target DRB; or

When the UE sends the data packet of the remapping data stream on the target DRB, setting the data stream remapping field in a packet header of the specified data packet,

The specified time period and the specified data packet are determined by the UE.
The method according to any one of claims 1 to 5, wherein the performing the data stream remapping operation by the UE according to the data stream remapping information comprises: when the UE adopts a reflection mirror mapping manner to transmit the uplink of the data stream a data packet, when the UE receives a downlink data packet of the data stream on a target DRB, and the data stream remapping information is included in a packet header of the downlink data packet, the UE uplinks the data stream The data packet is mapped to the target DRB that received the downstream data packet.
The method according to any one of claims 1 to 8, wherein the UE performs a data stream remapping operation according to the data stream remapping information, and further includes:

The UE discards the data packet of the remapping data stream received from the source DRB,

The source DRB is a DRB before the data stream is remapped, and the remapping data stream is remapped from the source DRB to a target DRB.
A data stream remapping apparatus comprising:

a receiving module, configured to receive data stream remapping information notified by the radio access network RAN device;

A remapping module is configured to perform a data stream remapping operation according to the data stream remapping information.
The device according to claim 10, wherein

The receiving module is configured to receive data stream remapping information that is notified by the RAN device by using a control plane signaling;

The data stream remapping information is one of: instructing the UE to delete information that is mapped to the data stream information on the data radio bearer DRB; and instructing the UE to update information that is mapped to the data stream information on the DRB; The data stream information is identified by a QoS identifier ID or a packet filter;

The remapping module is configured to: when the data flow information is identified by the QoS ID, delete a QoS ID mapped to the DRB, and update a QoS ID mapped to the DRB;

The remapping module is further configured to: when the data stream information is characterized by a packet filter, delete a packet filter mapped to the DRB, or update a packet filter mapped to the DRB.
A user equipment comprising a memory and one or more processors, wherein

The memory storing one or more programs: when the one or more programs are executed by the one or more processors, such that the one or more processors implement any of claims 1-10 Method described in the item
A data stream remapping method includes:

The radio access network RAN device notifies the user equipment UE data stream remapping information;

The RAN device performs a data stream remapping operation.
The method according to claim 13, wherein the radio access network RAN device notifying the user equipment UE that the data stream remapping information comprises: the RAN device notifying the UE of the data stream remapping information by using control plane signaling ;

The data stream remapping information is one of the following:

Instructing the UE to delete information mapped to data flow information on the data radio bearer DRB;

Instructing the UE to update information mapped to data flow information on the DRB.
The method of claim 14 wherein

The data flow information is identified by a QoS identification ID or a packet filter.

When the data flow information is identified by the QoS ID, the data flow information mapped to the DRB is a QoS ID mapped from the delete to the DRB; and the update is mapped to the data flow on the DRB. The information is an update mapped to the QoSID on the DRB;

When the data stream information is identified by a packet filter, the deleting the data stream information mapped to the DRB is deleting a packet filter mapped to the DRB; and the updating is mapped to the DRB. The data stream information is an update to a packet filter mapped to the DRB.
The method according to claim 13, wherein the radio access network RAN device notifying the user equipment that the UE data stream remapping information comprises:

And the RAN device notifies the UE of the data stream remapping information by using a packet header of a user plane data packet; wherein the data stream remapping information is included in a remapping field of a packet header of the data packet.
The method of claim 16 wherein the remapping field comprises one of the following formats:

The remapping field includes a first indicator bit and a first remapping information bit, where the first indicator bit is used to indicate whether the first remapping information bit exists; the first remapping information bit is used to Indicate whether the data stream is remapped;

The remapping field includes a second indication bit and a first remapping DRB information, where the second indication bit is used to indicate whether the first remapping DRB information exists; the first remapping DRB information is used Information indicating the source DRB when the data stream is remapped;

The remapping field includes a second remapping information bit, and the second remapping information bit is used to indicate whether the data stream is remapped;

The remapping field includes second remapping DRB information, and the second remapping DRB information is used to indicate information of a source DRB when the data stream is remapping.
The method according to any one of claims 13 to 17, wherein the RAN device performs a data stream remapping operation, comprising:

The RAN device sequentially migrates the legacy data packet in the transmit buffer of the source DRB to the transmit buffer of the target DRB;

The source DRB is a DRB before the remapping data stream is remapped, and the target DRB is a DRB after the remapping data stream is remapped, the remapping data stream Redirecting from the source DRB to the target DRB;

The legacy data packet in the sending buffer of the source DRB includes:

In the transmission buffer of the source DRB, all the data packets starting from the first data packet that has not been successfully received by the UE.
The method of claim 18, wherein the RAN device performs a data stream remapping operation, further comprising:

Setting, by the RAN device, a data stream replaying field in a packet header of the data packet of the remapping data stream in a specified time period of sending the data packet of the remapping data stream on the target DRB; or,

When the RAN device sends the data packet of the remapping data stream on the target DRB, setting the data stream remapping field in a header of the specified data packet of the remapping data stream,

The specified time period and the designated data packet are determined by the RAN device.
The method according to any one of claims 13 to 19, wherein the performing, by the RAN device, a data stream remapping operation comprises:

The RAN device discards a data packet of the remapping data stream received from the source DRB, wherein the source DRB is a DRB before the data stream is remapped, and the remapping data stream is from the source The DRB is remapped to the target DRB.
A data stream remapping apparatus comprising:

a notification module, configured to notify the user equipment UE data stream remapping information;

A remapping module, set to perform a data stream remapping operation.
The device according to claim 21, wherein

The notification module is configured to: when the data stream remapping information is notified by the user plane data packet header, the data stream remapping information is included in a remapping field of the data packet header, The remapping field includes one of the following formats:

The remapping field includes a first indicator bit and a first remapping information bit, where the first indicator bit is used to indicate whether the first remapping information bit exists; the first remapping information bit is used to Indicate whether the data stream is remapped;

The remapping field includes a second indication bit and a first remapping DRB information, where the second indication bit is used to indicate whether the first remapping DRB information exists; the first remapping DRB information is used Information indicating the source DRB when the data stream is remapped;

The remapping field includes a second remapping information bit, and the second remapping information bit is used to indicate whether the data stream is remapped;

The remapping field includes second remapping DRB information, and the second remapping DRB information is used to indicate information of a source DRB when the data stream is remapping.
A radio access network RAN device, comprising: a memory and one or more processors, wherein

The memory storing one or more programs; when the one or more programs are executed by the one or more processors, such that the one or more processors implement any one of claims 25-34 The method described in the item.
A computer readable storage medium storing computer executable instructions for performing the method of any one of claims 1-9 and 13-20.