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WO2021254362A1 - Procédé et système de commutation de chemin primaire, dispositif électronique et support de stockage lisible par ordinateur - Google Patents

Procédé et système de commutation de chemin primaire, dispositif électronique et support de stockage lisible par ordinateur Download PDF

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Publication number
WO2021254362A1
WO2021254362A1 PCT/CN2021/100272 CN2021100272W WO2021254362A1 WO 2021254362 A1 WO2021254362 A1 WO 2021254362A1 CN 2021100272 W CN2021100272 W CN 2021100272W WO 2021254362 A1 WO2021254362 A1 WO 2021254362A1
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WIPO (PCT)
Prior art keywords
node
state information
information
terminal
uplink
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PCT/CN2021/100272
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English (en)
Chinese (zh)
Inventor
王军涛
王代锋
杜高鹏
杨敏
黄雪英
司伟
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
    • H04W40/10—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources based on available power or energy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality

Definitions

  • the embodiments of the present application relate to the field of wireless communication technology.
  • Dual Connectivity (DC) technology makes full use of the wireless air interface resources of different base stations (such as base stations of different standards or different standards) to improve the user experience rate. For example, the use of macro base stations and micro base stations can improve spectrum efficiency and load balance. . Terminals that support DC can be connected to two base stations at the same time to increase the throughput of a single user.
  • Uplink data offloading means that in the DC link scenario, the DC terminal uses both the master node (Master Node, MN) and the secondary node (Secondary Node, SN) path at the same time to increase the air interface traffic; when the amount of uplink data is small, it can provide Primary Path is configured as the default path.
  • Master Node, MN Master Node
  • Secondary Node, SN Secondary Node
  • the first node includes a Packet Data Convergence Protocol (PDCP) layer
  • the method includes: acquiring bottom-level status information of a node connected to the terminal; wherein the node connected to the terminal includes a first node and at least one second node that does not include a PDCP layer corresponding to the offload bearer, and the bottom-level status information is used to indicate the terminal
  • the state of the link with the node; the optimal path is determined according to the underlying state information of the node connected to the terminal; and the optimal path is determined as the main path.
  • Another aspect of the embodiments of the present application provides a primary path switching method, which is applied to a second node connected to a terminal in a DC scenario or a multi-connection scenario.
  • the second node does not include the PDCP layer corresponding to the offload bearer.
  • the method includes: The first node reports the bottom-level status information of the second node; where the first node is a node that includes the PDCP layer corresponding to the offload bearer connected to the terminal, and the bottom-level status information of the second node is used to indicate the connection between the terminal and the second node Link status.
  • Another aspect of the embodiments of the present application provides an electronic device, including: at least one processor; and, a memory, at least one program is stored in the memory, and when the at least one program is executed by the at least one processor, the at least one processor realizes At least one step of the primary path switching method provided in the embodiment of the present application.
  • Another aspect of the embodiments of the present application provides a computer-readable storage medium on which a computer program is stored.
  • the computer program is executed by a processor, at least one step of the main path switching method provided in the embodiment of the present application is implemented.
  • a main path switching system including: a first node connected to a terminal and at least one second node; wherein: the first node is configured to obtain the first bottom layer state of the first node Information; receiving the second underlying state information of the second node reported by any one of the at least one second node; determining the optimal path according to the first underlying state information and the second underlying state information; and determining the optimal path
  • the main path wherein the first node includes the PDCP layer corresponding to the offload bearer, and the first bottom layer state information is used to indicate the link state between the terminal and the first node; and the second node is configured to The node reports the second bottom layer state information of the second node; wherein the second node does not include the PDCP layer corresponding to the offload bearer, and the second bottom layer state information is used to indicate the link state between the terminal and the second node.
  • FIG. 1 is a flowchart of a method for switching a primary path provided by an embodiment of the application.
  • Fig. 2 is a schematic diagram of a structure of the protocol layer of a node connected to a terminal provided by an embodiment of the application.
  • FIG. 3 is another flowchart of the main path switching method provided by an embodiment of the application.
  • Fig. 4 is a schematic diagram of a scenario of Example 1 of the embodiment of the application.
  • Fig. 5 is a schematic diagram of a scenario in Example 2 of an embodiment of the application.
  • FIG. 6 is a schematic diagram of a scenario in Example 3 of an embodiment of the application.
  • FIG. 7 is a block diagram of a composition of a main path switching device provided by an embodiment of the application.
  • FIG. 8 is a block diagram of another composition of the main path switching device provided by an embodiment of the application.
  • FIG. 9 is a block diagram of a composition of a main path switching system provided by an embodiment of the application.
  • the DC terminal can provide the main path as the default path configuration when the amount of uplink data is small.
  • the main paths are statically configured, which cannot dynamically coordinate the optimal resources of the air interface, and may cause uplink data transmission failure.
  • embodiments of the present application provide a main path switching method, device and system, electronic equipment, and computer-readable storage medium.
  • the embodiments of this application are based on the DC scenario, they are also applicable to the multi-connection scenario.
  • FIG. 1 is a flowchart of a method for switching a primary path provided by an embodiment of the application.
  • the primary path switching method can be applied to a first node connected to a terminal in a DC scenario or a multi-connection scenario, and the first node includes a PDCP layer corresponding to the offload bearer.
  • DC scenarios include but are not limited to: Long Term Evolution (LTE) DC, Evolved Universal Mobile Telecommunications (UMTS) Terrestrial Radio Access (Evolved-UMTS Terrestrial Radio Access) , E-UTRA) New Radio (New Radio, NR) DC (E-UTRA NR DC, EN-DC), 5G Radio Access Network (Next Generation Radio Access Network, NG-RAN) E-UTRA-NR DC (NG-RAN) -RAN E-UTRA-NR DC, NGEN-DC), NR E-UTRA DC (NE-DC), NR NR DC (NR-DC) and Multi-Radio DC (Multi-Radio DC, MR-DC).
  • LTE Long Term Evolution
  • UMTS Evolved Universal Mobile Telecommunications
  • E-UMTS Terrestrial Radio Access Evolved-UMTS Terrestrial Radio Access
  • E-UTRA New Radio
  • New Radio, NR E-UTRA NR DC, EN-DC
  • 5G Radio Access Network Next Generation Radio Access Network, NG-RAN
  • the main path switching method may include step 100, step 101, and step 102.
  • step 100 the bottom layer status information of the node connected to the terminal is obtained; wherein the node connected to the terminal includes the first node and at least one second node that does not include the PDCP layer corresponding to the offload bearer, and the bottom layer status information is used to indicate The state of the link between the terminal and the node.
  • Fig. 2 shows a schematic diagram of the structure of the protocol layer of the node connected to the terminal taking DC as an example. As shown in FIG. 2, only one node among the nodes connected to the terminal includes the PDCP layer corresponding to the offload bearer, and none of the other nodes includes the PDCP layer corresponding to the offload bearer.
  • the first node is an MN
  • the second node is an SN
  • one second node is MN, and the first node and other second nodes are SN.
  • the underlying state information includes at least one of the following: uplink channel measurement information, uplink transmission delay, jitter, or packet loss rate.
  • the uplink channel measurement information includes at least one of the following: uplink channel quality and uplink path loss.
  • the uplink transmission delay refers to the unidirectional or loopback delay of the service packet at the PDCP layer and the radio link protocol (Radio Link Control, RLC) layer of the node connected to the terminal.
  • the loopback delay refers to the sum of the delay of the transmission of the service message from the PDCP layer to the RLC layer, and the sum of the delay of the transmission of the service message from the RLC layer to the PDCP layer.
  • the uplink channel quality is a measurement method for the nodes connected to the terminal to detect effective uplink signals. The larger the value of the uplink channel quality, the more effective uplink signals.
  • Uplink path loss is the loss between the electromagnetic wave emitted by the terminal and the node connected to the terminal.
  • Uplink jitter is the fluctuation range of the uplink transmission delay. The greater the fluctuation of the uplink transmission delay, the greater the jitter.
  • the packet loss rate is the percentage of the number of lost packets in the transmitted data.
  • the first node can directly obtain the uplink transmission delay of the first node, and the second node needs the PDCP layer corresponding to the offload bearer of the first node to send a first time stamped first time stamp to the RLC layer corresponding to the offload bearer of the second node.
  • the transmission delay from the PDCP layer to the RLC layer is the difference between the second time stamp and the first time stamp; the transmission delay from the RLC layer to the PDCP layer is the third time stamp and the second time The difference between the timestamps; the loopback delay is the difference between the third timestamp and the first timestamp.
  • obtaining the bottom-level state information of the node connected to the terminal may include: obtaining the bottom-level state information of the first node; and, obtaining the bottom-level state information of the second node.
  • acquiring the bottom-level state information of the first node may include: the PDCP layer of the first node receives the bottom-level state information of the first node reported by the RLC layer of the first node.
  • acquiring the bottom-level status information of the first node may include: the PDCP layer of the first node sends a first report identifier to the RLC layer of the first node; wherein, the first report identifier is used to trigger the first
  • the RLC layer of the node reports the bottom-level state information of the first node to the PDCP layer of the first node; the PDCP layer of the first node receives the bottom-level state information of the first node reported by the RLC layer of the first node.
  • the RLC layer of the first node may actively report the underlying state information of the first node, or may report the underlying state information of the first node only after receiving the first report identifier sent by the PDCP layer of the first node.
  • acquiring the bottom-level status information of the second node may include: receiving the bottom-level status information of the second node reported by the second node; specifically, the PDCP layer of the first node receives the information reported by the RLC layer of the second node The bottom-level status information of the second node.
  • obtaining the bottom-level status information of the second node may include: sending a second report identifier to the second node; wherein the second report identifier is used to trigger the second node to report the bottom-level status information of the second node Specifically, the PDCP layer of the first node sends a second report identifier to the RLC layer of the second node; wherein, the second report identifier is used to trigger the RLC layer of the second node to report the PDCP layer of the first node to the PDCP layer of the second node Bottom-level status information; the PDCP layer of the first node receives the bottom-level status information of the second node reported by the RLC layer of the second node.
  • the second node can actively report the bottom-level status information of the second node, or it can report the bottom-level status information of the second node only when it receives the second report identifier sent by the first node; specifically, the second node
  • the RLC layer may actively report the underlying state information of the second node, or it may report the underlying state information of the second node only after receiving the second report identifier sent by the PDCP layer of the first node.
  • the bottom-level state information of the first node is detected through the Media Access Control (MAC) layer and the physical layer of the first node, and the bottom-level state information of the first node is reported to the first node.
  • MAC Media Access Control
  • RLC layer; the MAC layer and the physical layer can specifically use technical means well known to those skilled in the art to detect the underlying state information and report it to the RLC layer, which is not limited in the embodiment of the present application.
  • the underlying state information of the first node is detected through the MAC layer and physical layer of the second node, and the underlying state information of the second node is reported to the RLC layer of the second node;
  • the MAC layer and the physical layer are specifically Technical means well known to those skilled in the art can be used to detect the underlying state information and report it to the RLC layer, which is not limited in the embodiment of the present application.
  • the first node's underlying state information can be detected through the MAC layer and the physical layer of the first node when the terminal performs offloading; in this case, the first node
  • the RLC layer corresponding to the offload bearer of the node reports the bottom-level status information of the first node to the PDCP layer corresponding to the offload bearer of the first node; when the terminal does not support the upstream offload capability, the terminal can perform non-offload bearer through the first node.
  • the MAC layer and physical layer of the node detect the underlying state information of the first node; in this case, the RLC layer corresponding to the non-distributed bearer of the first node reports the underlying state information of the first node to the corresponding non-distributed bearer of the first node
  • the PDCP layer detects the underlying state information of the first node; in this case, the RLC layer corresponding to the non-distributed bearer of the first node reports the underlying state information of the first node to the corresponding non-distributed bearer of the first node.
  • the terminal when it supports the uplink offload capability, it can detect the underlying state information of the second node through the MAC layer and the physical layer of the second node when the terminal performs offloading; in this case, the second node
  • the RLC layer corresponding to the offload bearer of the node reports the bottom-level status information of the second node to the PDCP layer corresponding to the offload bearer of the first node; when the terminal does not support the upstream offload capability, the terminal can perform non-offload bearer through the second
  • the MAC layer and physical layer of the node detect the bottom-level status information of the second node; in this case, the RLC layer corresponding to the non-distributed bearer of the second node reports the bottom-level status information of the second node to the corresponding non-distributed bearer of the first node
  • the PDCP layer when the terminal supports the uplink offload capability, it can detect the underlying state information of the second node through the MAC layer and the physical layer of the
  • the PDCP layer of the first node sending the first report identifier to the RLC layer of the first node may include: the PDCP layer of the first node sending the first downlink user data packet to the RLC layer of the first node ; Among them, the protocol data unit (Protocol Data Unit, PDU) in the first downlink user data packet includes the first report identifier.
  • PDU Protocol Data Unit
  • the PDCP layer of the first node may also use other methods to send the first report identifier to the RLC layer of the first node, and the specific sending method is not used to limit the protection scope of the embodiments of the present application.
  • sending the second report identifier to the second node may include: sending a second downlink user data packet to the second node; wherein the PDU in the second downlink user data packet includes the second report identifier.
  • the first node may also use other methods to send the second report identifier to the second node, and the specific sending method is not used to limit the protection scope of the embodiments of the present application.
  • the PDCP layer of the first node receiving the first node's bottom-level state information reported by the first node's RLC layer may include: the first node's PDCP layer receiving the first node's first node's RLC layer reported Auxiliary information data; wherein, the first auxiliary information data includes the underlying state information of the first node.
  • receiving the bottom-level state information of the second node reported by the second node may include: receiving second auxiliary information data reported by the second node; wherein the second auxiliary information data includes the bottom-level state information of the second node information.
  • the first auxiliary information data or the second auxiliary information data is as shown in Table 1, which may include: data type, working mode of the PDCP layer, power headroom report (PHR) status, Uplink (UL) signal to noise ratio (Signal to Interference plus Noise Ratio, SINR) status, UL path loss status, number of auxiliary information fields, type of auxiliary information, number of bytes in the radio quality auxiliary information field, and/ Or wireless quality auxiliary information.
  • PHR power headroom report
  • UL Uplink
  • SINR Signal to Noise Ratio
  • Data type such as PDU type, SDU type.
  • the data provided by the lower layer is the SDU;
  • the data provided by the upper layer is the PDU.
  • PDCP duplex refers to the duplex mode of the PDCP layer.
  • the PHR state used by the MAC layer to calculate the quality of the uplink channel.
  • the first value indicates the credible state
  • the second value indicates the untrusted state; for example, the first value is 1, the second value It is 0; or, the first value is 0 and the second value is 1; or, it can be other values, as long as the first value and the second value are different.
  • the UL SINR status used when the MAC layer calculates the uplink channel quality.
  • the third value indicates the trusted state, and the fourth value indicates the untrusted state; for example, the third value is 1, the first The four value is 0; or, the third value is 0 and the fourth value is 1; or, it can be other values, as long as the third value and the fourth value are different.
  • UL path loss status the status of the UL path loss used by the MAC layer to calculate the uplink channel quality.
  • the value of the fifth value indicates the trusted state
  • the value of the sixth value indicates the untrusted state; for example, the fifth value is 1, the sixth value is 0; or, the fifth value is 0, and the sixth value is 1; or, it can be other values, as long as the fifth value and the sixth value are different.
  • the number of auxiliary information fields Determined according to the actual reported auxiliary information type and the number of bytes of the wireless quality auxiliary information field.
  • Auxiliary information type the type of the underlying status information reported.
  • a custom value range can be used to define the type of status information reported. For example, if the custom value range is 7-228, then 7 can be defined as the uplink channel Quality, 8 is the uplink path loss, 9 is the uplink transmission delay, 10 is the jitter, and 11 is the packet loss rate; the specific value used to represent which type is determined by the user.
  • the number of bytes in the wireless quality auxiliary information field the number of bytes occupied by the reported underlying status information.
  • Wireless quality auxiliary information the value of the reported underlying state information.
  • step 101 the optimal path is determined according to the underlying state information of the node connected to the terminal.
  • the optimal path is determined according to the underlying state information of the node connected to the terminal.
  • determining whether the underlying state information of the node connected to the terminal is valid may include: determining whether the underlying state information of the first node is valid; and determining whether the underlying state information of the second node is valid.
  • any one of the following manners 1) to manner 3) can be used to determine whether the uplink channel quality in the bottom layer status information of the first node is valid.
  • method 1) it is determined whether the uplink channel quality in the bottom layer state information of the first node is valid according to the PHR state, the UL SINR state, and the UL path loss state corresponding to the uplink channel quality in the bottom layer state information of the first node. Specifically, it is determined whether the uplink channel quality in the bottom layer state information of the first node is valid according to the PHR state, the UL SINR state, and the UL path loss state in the first auxiliary information data reported by the RLC layer of the first node.
  • the following methods can be used to determine whether the uplink channel quality in the bottom layer status information of the first node is valid according to the PHR status, UL SINR status, and UL path loss status corresponding to the uplink channel quality in the bottom layer status information of the first node :
  • the PHR status corresponding to the uplink channel quality in the bottom layer status information of the first node is a trusted state
  • the UL SINR status is a trusted state
  • the UL path loss status is a trusted state
  • the bottom layer state information of the first node The uplink channel quality in the first node is valid
  • the PHR state corresponding to the uplink channel quality in the bottom layer status information of the first node is untrusted, or the UL SINR state is untrusted, or the UL path loss state is untrusted
  • the first node The uplink channel quality in the bottom layer status information of a node is invalid.
  • the following method can be used to determine whether the uplink channel quality in the bottom layer status information of the first node is valid according to the effective proportion of the first uplink quality: when the first effective proportion of the uplink quality is greater than or equal to the uplink effective proportion threshold, The uplink channel quality in the bottom layer status information of the first node is valid; when the first uplink quality effective ratio is less than the uplink effective ratio threshold, the uplink channel quality in the bottom layer status information of the first node is invalid.
  • mode 3 according to the PHR status, UL SINR status, UL path loss status corresponding to the uplink channel quality in the bottom layer status information of the first node, and the effective proportion of the first uplink quality, it is judged in the bottom layer status information of the first node Whether the quality of the uplink channel is valid. Specifically, according to the PHR status, UL SINR status, UL path loss status in the first auxiliary information data reported by the RLC layer of the first node, and the effective proportion of the first uplink quality, determine the uplink in the bottom layer status information of the first node. Whether the channel quality is valid.
  • the following methods can be used to realize the PHR status, UL SINR status, UL path loss status corresponding to the uplink channel quality in the bottom level status information of the first node, and the first uplink quality effective percentage to determine the bottom level status information of the first node Whether the uplink channel quality in the first node is valid: when the PHR status corresponding to the uplink channel quality in the bottom layer status information of the first node is a credible state, and the UL SINR state is a credible state, and the UL path loss state is a credible state, and When the first effective uplink quality ratio is greater than or equal to the uplink effective ratio threshold, the uplink channel quality in the bottom layer status information of the first node is valid; when the PHR status corresponding to the uplink channel quality in the bottom layer status information of the first node is not available When the UL SINR status is untrusted, or the UL path loss status is untrusted, or the effective proportion of the first uplink quality is less than the uplink effective proportion threshold, the uplink channel quality
  • the following method can be used to determine whether the uplink path loss in the bottom-level status information of the first node is valid: when the uplink path loss of the first node is within the first preset range, the first node’s The uplink path loss is valid; when the uplink path loss of the first node is outside the first preset range, the uplink path loss of the first node is invalid.
  • the following method can be used to determine whether the uplink transmission delay in the bottom layer status information of the first node is valid: when the uplink transmission delay of the first node is within the second preset range, the first node The uplink transmission delay of the node is valid; when the uplink transmission delay of the first node is outside the second preset range, the uplink transmission delay of the first node is invalid.
  • the following methods can be used to determine whether the jitter in the bottom-level state information of the first node is valid: when the jitter of the first node is within the third preset range, the jitter of the first node is valid; When the jitter of the first node is outside the third preset range, the jitter of the first node is invalid.
  • the following method can be used to determine whether the packet loss rate in the bottom layer status information of the first node is valid: when the packet loss rate of the first node is within the fourth preset range, the first node’s The packet loss rate is valid; when the packet loss rate of the first node is outside the fourth preset range, the packet loss rate of the first node is invalid.
  • any one of the following manners a) to manner c) can be used to determine whether the uplink channel quality in the bottom layer status information of the second node is valid.
  • method a it is determined whether the uplink channel quality in the bottom layer state information of the second node is valid according to the PHR state, the UL SINR state, and the UL path loss state corresponding to the uplink channel quality in the bottom layer state information of the second node. Specifically, it is determined whether the uplink channel quality in the bottom layer state information of the second node is valid according to the PHR state, the UL SINR state, and the UL path loss state in the second auxiliary information data reported by the second node.
  • the following methods can be used to determine whether the uplink channel quality in the bottom layer status information of the second node is valid according to the PHR status, UL SINR status, and UL path loss status corresponding to the uplink channel quality in the bottom layer status information of the second node:
  • the PHR state corresponding to the uplink channel quality in the bottom-level state information of the second node is a trusted state
  • the UL SINR state is a trusted state
  • the UL path loss state is a trusted state
  • the bottom-level state information of the second node The uplink channel quality of the second node is valid
  • the PHR status corresponding to the uplink channel quality in the bottom layer status information of the second node is untrusted, or the UL SINR status is untrusted, or the UL path loss status is untrusted
  • the second The uplink channel quality in the bottom layer status information of the node is invalid.
  • method b it is determined whether the uplink channel quality in the bottom layer status information of the second node is valid according to the effective proportion of the second uplink quality.
  • the following method can be used to determine whether the uplink channel quality in the bottom-level status information of the second node is valid according to the effective proportion of the second uplink quality: when the effective proportion of the second uplink quality is greater than or equal to the uplink effective proportion threshold, The uplink channel quality in the bottom layer status information of the second node is valid; when the second uplink quality effective proportion is less than the uplink effective proportion threshold, the uplink channel quality in the bottom layer state information of the second node is invalid.
  • method c) according to the PHR status, UL SINR status, UL path loss status corresponding to the uplink channel quality in the bottom layer status information of the second node, and the effective proportion of the second uplink quality, it is judged in the bottom layer status information of the second node Whether the quality of the uplink channel is valid. Specifically, according to the PHR status, UL SINR status, UL path loss status in the second auxiliary information data reported by the second node, and the effective percentage of the second uplink quality, it is determined whether the uplink channel quality in the bottom layer status information of the second node is efficient.
  • the following methods can be used to implement the PHR status, UL SINR status, UL path loss status corresponding to the uplink channel quality in the bottom level status information of the second node, and the second uplink quality effective percentage to determine the bottom level status information of the second node Whether the uplink channel quality in the bottom layer status information of the second node is valid: when the PHR status corresponding to the uplink channel quality in the bottom layer status information of the second node is trusted, the UL SINR status is trusted, and the UL path loss status is trusted, and When the second effective uplink quality ratio is greater than or equal to the uplink effective ratio threshold, the uplink channel quality in the bottom layer status information of the second node is valid; when the PHR status corresponding to the uplink channel quality in the bottom layer status information of the second node is not available If the UL SINR status is untrusted, or the UL path loss status is untrusted, or the effective proportion of the second uplink quality is less than the uplink effective proportion threshold, the uplink channel quality in the bottom layer
  • the following method can be used to determine whether the uplink path loss in the bottom layer status information of the second node is valid: when the uplink path loss of the second node is within the first preset range, the second node’s The uplink path loss is valid; when the uplink path loss of the second node is outside the first preset range, the uplink path loss of the second node is invalid.
  • the following method can be used to determine whether the uplink transmission delay in the bottom layer status information of the second node is valid: when the uplink transmission delay of the second node is within the second preset range, the second node The uplink transmission delay of the node is valid; when the uplink transmission delay of the second node is outside the second preset range, the uplink transmission delay of the second node is invalid.
  • the following methods can be used to determine whether the jitter in the bottom-level state information of the second node is valid: when the jitter of the second node is within the third preset range, the jitter of the second node is valid; When the jitter of the second node is outside the third preset range, the jitter of the second node is invalid.
  • the following method can be used to determine whether the packet loss rate in the bottom layer status information of the second node is valid: when the packet loss rate of the second node is within the fourth preset range, the second node's The packet loss rate is valid; when the packet loss rate of the second node is outside the fourth preset range, the packet loss rate of the second node is invalid.
  • the following method may be adopted to determine the optimal path according to the bottom-level state information of the node connected to the terminal: the optimal path is determined as the path between the terminal and the node whose bottom-level state information meets the first condition.
  • the first condition may include: the link state indicated by the underlying state information is the best.
  • the first condition may include at least one of the following: the uplink channel quality is the best; the uplink channel quality of the node with the best uplink channel quality is greater than or equal to the uplink channel quality threshold; the uplink path loss is the smallest; The uplink path loss of the node with the smallest loss is less than or equal to the uplink path loss threshold; the uplink transmission delay is the smallest; the uplink transmission delay of the node with the smallest uplink transmission delay is less than or equal to the maximum transmission delay; the jitter is the smallest; the node with the smallest jitter Jitter is less than or equal to the maximum jitter threshold; the packet loss rate is the smallest; or, the packet loss rate of the node with the smallest packet loss rate is less than or equal to the maximum packet loss rate threshold.
  • step 102 the main path is switched to the optimal path.
  • the method may further include: acquiring at least one of the following of the nodes connected to the terminal: standard information, frequency band information, or spectrum efficiency.
  • determining the optimal path according to the underlying state information of the node connected to the terminal may include: when the underlying state information of the node connected to the terminal satisfies the second condition, according to the standard information, frequency band information, and frequency spectrum of the node connected to the terminal At least one of the efficiencies determines the optimal path.
  • the second condition may include: the link status indicated by the bottom layer status information of the node connected to the terminal is not good.
  • the second condition may include at least one of the following: the uplink channel quality of all nodes is less than the uplink channel quality threshold; the uplink path loss of all nodes is greater than the uplink path loss threshold; the uplink transmission time of all nodes The delay is greater than the maximum transmission delay; the jitter of all nodes is greater than the maximum jitter threshold; or, the packet loss rate of all nodes is greater than the maximum packet loss rate threshold.
  • the standard information can be obtained by technical means well known to those skilled in the art, for example, obtained by broadcasting information between standards.
  • the standard information refers to standards such as 5G, 4G, 3G, 2G, etc.
  • the standard information also reflects the priority of the standard, for example, 5G>4G>3G>2G, that is, the priority of 5G The highest level, 4G second, and so on.
  • determining the optimal path according to the standard information of the node connected to the terminal may include: determining the optimal path as the path between the terminal and the node with the highest priority of the standard information.
  • determining the optimal path according to the standard information of the node connected to the terminal may include at least one of the following: when the terminal is located in the central area of the signal coverage area of the node with the high standard, the optimal path is determined The path is the path between the terminal and the node whose standard information is high-standard; or, when the terminal is located in the central area of the signal coverage area of the node whose standard information is low-standard, and the terminal is located at the signal coverage of the node whose standard information is high-standard information In the edge area of the area, the optimal path is determined as the path between the terminal and the node whose standard information is the low standard.
  • the central area of the signal coverage area may include an area whose distance from the central point of the signal coverage area is less than or equal to a preset threshold.
  • the edge area of the signal coverage area may include: an area whose distance from the center point of the signal coverage area is greater than a preset threshold.
  • the frequency band information can be obtained by technical means well known to those skilled in the art, for example, obtained by broadcasting information.
  • the low frequency band has the advantage of coverage and the high frequency band has the advantage of large bandwidth, it is possible to maximize the use of system resources by exerting a specific advantage in a specific scenario.
  • determining the optimal path according to the frequency band information of the node connected to the terminal may include at least one of the following: when the terminal is located in the edge area of the intersection of the signal coverage area of the node connected to the terminal, determining the optimal path The path is the path between the terminal and the node in the low frequency band; or, when the terminal is located in the central area of the intersection of the signal coverage area of the node connected to the terminal, the optimal path is determined to be the path between the terminal and the node in the high frequency band.
  • the spectrum efficiency indicator refers to the data transmitted per hertz (Hz) on the air interface, and the larger the value of the spectrum efficiency, the more data is transmitted per HZ on the air interface, and the higher the transmission efficiency.
  • determining the optimal path according to the spectral efficiency of the node connected to the terminal may include: determining the optimal path as the path between the terminal and the node with the highest spectral efficiency.
  • the main path switching method determines the optimal path based on the underlying state information of the node connected to the terminal, and then switches the main path to the optimal path, realizing the dynamic switching of the main path, that is, dynamically coordinating the air interface maximum Optimized resources, thereby improving the success rate of uplink data transmission.
  • FIG. 3 is another flowchart of the main path switching method provided by an embodiment of the application.
  • the primary path switching method can be applied to a second node connected to a terminal in a DC scenario or a multi-connection scenario, and the second node does not include the PDCP layer corresponding to the offload bearer.
  • the DC scenario may include, but is not limited to: LTE DC, EN-DC, NG-RAN, NGEN-DC, NE-DC, NR-DC, or MR-DC.
  • the main path switching method includes step 300.
  • step 300 the bottom layer status information of the second node is reported to the first node; where the first node is a node connected to the terminal and including the PDCP layer corresponding to the offload bearer.
  • the RLC layer of the second node reports the bottom layer state information of the second node to the PDCP layer of the first node; the bottom layer state information of the second node is used to indicate the link state between the terminal and the second node.
  • Fig. 2 shows a schematic diagram of the structure of the protocol layer of the node connected to the terminal taking DC as an example. As shown in FIG. 2, only one node among the nodes connected to the terminal includes the PDCP layer corresponding to the offload bearer, and none of the other nodes includes the PDCP layer corresponding to the offload bearer.
  • the first node is an MN
  • the second node is an SN
  • one second node is MN, and the first node and other second nodes are SN.
  • the underlying state information may include at least one of the following: uplink channel measurement information, uplink transmission delay, jitter, or packet loss rate.
  • the uplink channel measurement information may include at least one of the following: uplink channel quality, or uplink path loss.
  • the uplink transmission delay refers to the one-way or loopback delay of the PDCP layer and the RLC layer to the service message.
  • the loopback delay refers to the sum of the delay of the transmission of the service message from the PDCP layer to the RLC layer, and the sum of the delay of the transmission of the service message from the RLC layer to the PDCP layer.
  • the first node can directly obtain the uplink transmission delay of the first node, and the second node needs the PDCP layer corresponding to the offload bearer of the first node to send a first time stamped first time stamp to the RLC layer corresponding to the offload bearer of the second node.
  • the transmission delay from the PDCP layer to the RLC layer is the difference between the second time stamp and the first time stamp; the transmission delay from the RLC layer to the PDCP layer is the difference between the third time stamp and the second time stamp;
  • the return delay is the difference between the third time stamp and the first time stamp.
  • the underlying state information of the first node is detected through the MAC layer and physical layer of the second node, and the underlying state information of the second node is reported to the RLC layer of the second node;
  • the MAC layer and the physical layer are specifically Technical means well known to those skilled in the art can be used to detect the underlying state information and report it to the RLC layer, which is not limited in the embodiment of the present application.
  • the terminal when it supports the uplink offload capability, it can detect the underlying state information of the second node through the MAC layer and the physical layer of the second node when the terminal performs offloading; in this case, the second node
  • the RLC layer corresponding to the offload bearer of the node reports the bottom-level status information of the second node to the PDCP layer corresponding to the offload bearer of the first node; when the terminal does not support the upstream offload capability, the terminal can perform non-offload bearer through the second
  • the MAC layer and physical layer of the node detect the bottom-level status information of the second node; in this case, the RLC layer corresponding to the non-distributed bearer of the second node reports the bottom-level status information of the second node to the corresponding non-distributed bearer of the first node
  • the PDCP layer when the terminal supports the uplink offload capability, it can detect the underlying state information of the second node through the MAC layer and the physical layer of the
  • reporting the bottom-level state information of the second node to the first node may include: reporting second auxiliary information data to the first node; wherein the second auxiliary information data includes the bottom-level state information of the second node.
  • the second auxiliary information data may include: data type, working mode of the PDCP layer, PHR status, UL SINR status, UL path loss status, number of auxiliary information fields, The type of auxiliary information, the number of bytes of the wireless quality auxiliary information field, and/or the wireless quality auxiliary information.
  • Data type such as PDU type, SDU type.
  • the data provided by the lower layer is the SDU;
  • the data provided by the upper layer is the PDU.
  • PDCP duplex refers to the duplex mode of the PDCP layer.
  • the PHR state used by the MAC layer to calculate the uplink channel quality.
  • the first value indicates the credible state
  • the second value indicates the untrusted state; for example, the first value is 1, the second value It is 0; or, the first value is 0 and the second value is 1; or, it can be other values, as long as the first value and the second value are different.
  • the UL SINR status used when the MAC layer calculates the uplink channel quality.
  • the third value indicates the trusted state, and the fourth value indicates the untrusted state; for example, the third value is 1, the first The four value is 0; or, the third value is 0 and the fourth value is 1; or, it can be other values, as long as the third value and the fourth value are different.
  • UL path loss status the status of the UL path loss used by the MAC layer to calculate the uplink channel quality.
  • the value of the fifth value indicates the trusted state
  • the value of the sixth value indicates the untrusted state; for example, the fifth value is 1, the sixth value is 0; or, the fifth value is 0, and the sixth value is 1; or, it can be other values, as long as the fifth value and the sixth value are different.
  • the number of auxiliary information fields Determined according to the actual reported auxiliary information type and the number of bytes of the wireless quality auxiliary information field.
  • Auxiliary information type the type of the underlying status information reported.
  • a custom value range can be used to define the type of status information reported. For example, if the custom value range is 7-228, then 7 can be defined as the uplink channel Quality, 8 is the uplink path loss, 9 is the uplink transmission delay, 10 is the jitter, and 11 is the packet loss rate; the specific value used to represent which type is determined by the user.
  • the number of bytes in the wireless quality auxiliary information field the number of bytes occupied by the reported underlying status information.
  • Wireless quality auxiliary information the value of the reported underlying state information.
  • the method before reporting the bottom-level state information of the second node to the first node, the method may further include step 301.
  • a second report identifier sent by the first node is received; where the second report identifier is used to trigger the second node to report the underlying state information of the second node.
  • the RLC layer of the second node receives the second report identifier sent by the PDCP layer of the first node.
  • the second node can actively report the bottom-level status information of the second node, or it can report the bottom-level status information of the second node only when it receives the second report identifier sent by the first node; specifically, the second node
  • the RLC layer may actively report the underlying state information of the second node, or it may report the underlying state information of the second node only after receiving the second report identifier sent by the PDCP layer of the first node.
  • receiving the second report identifier sent by the first node may include: receiving a second downlink user data packet sent by the first node; wherein the PDU in the second downlink user data packet includes the second report identifier .
  • the second node may also use other methods to receive the second report identifier sent by the first node, and the specific receiving method is not used to limit the protection scope of the embodiments of the present application.
  • This example describes the method of switching the main uplink path based on the bottom-level status information of the eNB and the bottom-level status information of the gNB in the EN-DC scenario.
  • MN is eNB
  • SN is gNB
  • eNB The PDCP layer corresponding to the offload bearer is included.
  • the gNB does not include the PDCP layer corresponding to the offload bearer.
  • the eNB and the gNB are connected through an X2-U interface, and the gNB and EPC are connected through an S1-U interface.
  • the non-standalone (Non-Standalone, NSA) terminal is in the central area of the signal coverage area of the gNB, and the main path of the initial service configuration is the path between the NSA terminal and the gNB.
  • the PDCP layer of the eNB judges comprehensively based on the underlying state information of the eNB and the underlying state information of the gNB, and considers that the path between the NSA terminal and the eNB is the optimal path.
  • the main uplink path is switched to the path between the NSA terminal and the eNB.
  • the PDCP layer of the eNB comprehensively judges based on the underlying state information of the eNB and the underlying state information of the gNB.
  • the path between the two is the optimal path, and the main uplink path is switched to the path between the NSA terminal and the gNB.
  • This example describes the method of switching the main uplink path according to the bottom-level status information of the eNB and the bottom-level status information of the gNB in the EN-DC scenario.
  • MN is eNB
  • SN is gNB
  • eNB The PDCP layer corresponding to the offload bearer is not included, and the gNB includes the PDCP layer corresponding to the offload bearer.
  • the uplink transmission delay of the gNB is small, and the jitter is small, and the packet loss rate is small; and the uplink transmission delay of the eNB is greater than the maximum transmission delay, and the jitter is greater than the maximum jitter threshold; gNB considers that there is a gap between the NSA terminal and the gNB at this time
  • the path of is the optimal path.
  • the main uplink path is switched to the path between the NSA terminal and the eNB, and the uplink shunt threshold is set to infinity.
  • the uplink is not suitable for shunting at the eNB.
  • This example describes an EN-DC scenario, a method for a terminal that does not support uplink offload capability to perform uplink primary path switching.
  • MN is eNB
  • SN is gNB
  • eNB does not include the PDCP layer corresponding to the offload bearer
  • gNB includes The offload bears the corresponding PDCP layer.
  • the NSA terminal capability indicates that it does not support uplink offloading, that is, only supports one RLC layer data at a time.
  • the following operations are performed: The main uplink path is switched to the path between the NSA terminal and the eNB; if the terminal is located in the central area of the signal coverage area of the gNB, the main uplink path is switched to the path between the NSA terminal and the gNB.
  • An embodiment of the present application also provides an electronic device, including: at least one processor; and, a memory, at least one program is stored in the memory, and when the at least one program is executed by the at least one processor, the at least one processor implements the implementation of the application At least one step of any primary path switching method provided in the example.
  • a processor is a device with data processing capabilities, including but not limited to a central processing unit (CPU), etc.
  • a memory is a device with data storage capabilities, including but not limited to random access memory (Random Access Memory).
  • RAM random access memory
  • RAM more specifically such as SDRAM (Synchronous Dynamic Random Access Memory), DDR (Data Direction Register), etc.), Read-Only Memory (ROM), Electrically Erasable Programmable Read Only Memory, EEPROM), Flash memory (FLASH).
  • the processor and the memory are connected to each other through a bus, and further connected to other components of the electronic device.
  • the embodiments of the present application also provide a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, at least one step of any one of the main path switching methods provided in the embodiments of the present application is implemented.
  • FIG. 7 is a block diagram of a composition of a main path switching device provided by an embodiment of the application.
  • the main path switching apparatus may be a first node connected to a terminal in a DC scenario or a multi-connection scenario, and the first node includes a PDCP layer corresponding to the offload bearer.
  • the main path switching device may include: an information acquisition module 701, an optimal path determination module 702, and a main path switching module 703.
  • the information acquisition module 701 is configured to acquire the bottom-level status information of the nodes connected to the terminal; wherein the nodes connected to the terminal include the first node and at least one second node that does not include the PDCP layer corresponding to the offload bearer; the bottom-level status information is used To indicate the status of the link between the terminal and the node.
  • the optimal path determination module 702 is configured to determine the optimal path according to the underlying state information of the node connected to the terminal.
  • the main path switching module 703 is configured to switch the main path to the optimal path.
  • the information obtaining module 701 may be specifically configured to: obtain the bottom-level state information of the first node; and obtain the bottom-level state information of the second node.
  • the information acquisition module 701 may be specifically configured to: receive the bottom-level state information of the first node reported by the RLC layer of the first node; and receive the bottom-level state information of the second node reported by the second node.
  • the information acquisition module 701 may be specifically configured to: send a first report identifier to the RLC layer of the first node; wherein, the first report identifier is used to trigger the RLC layer of the first node to report to the first node
  • the PDCP layer reports the bottom-level status information of the first node; receives the bottom-level status information of the first node reported by the RLC layer of the first node; sends a second report identifier to the second node; wherein the second report identifier is used to trigger the second
  • the node reports the bottom-level state information of the second node; and receives the bottom-level state information of the second node reported by the second node.
  • the information acquisition module 701 may be specifically configured to receive the first node's underlying state information reported by the first node's RLC layer in the following manner: the first node's PDCP layer receives the first node's RLC The first auxiliary information data reported by the layer; wherein, the first auxiliary information data includes: bottom-level state information of the first node.
  • the information acquisition module 701 may be specifically configured to receive the bottom-level state information of the second node reported by the second node in the following manner: receive the second auxiliary information data reported by the second node;
  • the second auxiliary information data includes: bottom-level state information of the second node.
  • the optimal path determination module 702 may be specifically configured to determine the optimal path according to the underlying state information of the node connected to the terminal when the underlying state information of the node connected to the terminal is valid.
  • the optimal path determination module 702 may also be configured to: determine whether the bottom-level state information of the first node is valid; and determine whether the bottom-level state information of the second node is valid.
  • the optimal path determination module 702 may be specifically configured to determine whether the bottom-level state information of the first node is valid in the following manner: according to the PHR corresponding to the uplink channel quality in the bottom-level state information of the first node Status, UL SINR status, and uplink path loss status determine whether the uplink channel quality in the bottom layer status information of the first node is valid.
  • the optimal path determination module 702 may be specifically configured to determine whether the bottom-level status information of the second node is valid in the following manner: according to the PHR corresponding to the uplink channel quality in the bottom-level status information of the second node Status, UL SINR status, and uplink path loss status determine whether the uplink channel quality in the bottom layer status information of the second node is valid.
  • the optimal path determination module 702 may be specifically configured to determine the optimal path as the path between the terminal and the node whose underlying state information meets the first condition; wherein, the first condition includes: the underlying state The link status indicated by the information is the best.
  • the underlying state information may include at least one of the following: uplink channel quality, uplink path loss, uplink transmission delay, jitter, or packet loss rate.
  • the first condition may include at least one of the following: the uplink channel quality is the best; the uplink channel quality of the node with the best uplink channel quality is greater than or equal to the uplink channel quality threshold; the uplink path loss is the smallest; the uplink path loss of the node with the smallest uplink path loss Less than or equal to the uplink path loss threshold; the uplink transmission delay is the smallest; the uplink transmission delay of the node with the smallest uplink transmission delay is less than or equal to the maximum transmission delay; the jitter is the smallest; the jitter of the node with the smallest jitter is less than or equal to the maximum jitter threshold; The packet loss rate is the smallest; or, the packet loss rate of the node with the smallest packet loss rate is less than or equal to the maximum packet loss rate threshold.
  • the information acquisition module 701 may also be configured to acquire at least one of the following of the nodes connected to the terminal: standard information, frequency band information, or spectrum efficiency.
  • the optimal path determination module 702 may be specifically configured to: when the underlying state information of the node connected to the terminal meets the second condition, according to the standard information, frequency band information, and frequency spectrum of the node connected to the terminal At least one of the efficiencies determines the optimal path; wherein, the second condition includes: the link state indicated by the underlying state information of the node connected to the terminal is not good.
  • the underlying state information may include at least one of the following: uplink channel quality, uplink path loss, uplink transmission delay, jitter, or packet loss rate.
  • the second condition may include at least one of the following: the uplink channel quality of all nodes is less than the uplink channel quality threshold; the uplink path loss of all nodes is greater than the uplink path loss threshold; the uplink transmission delay of all nodes is greater than the maximum transmission delay; The jitter of all nodes is greater than the maximum jitter threshold; or, the packet loss rate of all nodes is greater than the maximum packet loss rate threshold.
  • FIG. 8 is a block diagram of another composition of the main path switching device provided by an embodiment of the application.
  • the main path switching device may be a second node connected to the terminal in a DC scenario or a multi-connection scenario, and the second node does not include a PDCP layer corresponding to the offload bearer.
  • the main path switching device includes a bottom-level status information reporting module 801.
  • the bottom-level status information reporting module 801 is configured to report bottom-level status information of the second node to the first node; wherein the first node is a node connected to the terminal and includes the PDCP layer corresponding to the offload bearer; bottom-level status information of the second node Used to indicate the link status between the terminal and the second node.
  • the device may further include: a receiving module 802 configured to receive a second report identifier sent by the first node; wherein the second report identifier is used to trigger the second node to report the bottom layer of the second node status information.
  • the bottom-level state information reporting module 801 may be specifically configured to report the second auxiliary information data to the first node; wherein the second auxiliary information data includes: the bottom-level state information of the second node.
  • FIG. 9 is a block diagram of a composition of a main path switching system provided by an embodiment of the application.
  • the main path switching system includes: a first node 901 and at least one second node 902 connected to a terminal.
  • the first node 901 includes the PDCP layer corresponding to the offload bearer, and the second node 902 does not include the PDCP layer corresponding to the offload bearer.
  • the first node 901 is configured to obtain the bottom-level status information of the first node 901; receive the bottom-level status information of the second node 902 reported by at least one second node 902; determine the optimal path according to the bottom-level status information of the node connected to the terminal ; Switch the main path to the optimal path; where the nodes connected to the terminal include: a first node 901 and at least one second node 902; the underlying state information is used to indicate the state of the link between the terminal and the node.
  • the second node 902 is configured to report the underlying state information of the second node 902 to the first node 901.
  • the first node 901 may also be configured to: send a second report identifier to the second node 902; wherein the second report identifier is used to trigger the second node 902 to report the underlying state of the second node 902 Information; receiving the bottom-level state information of the second node 902 reported by the second node 902.
  • the second node 902 may also be configured to: receive the second report identifier sent by the first node 901; and report the underlying state information of the second node 902 to the first node 901.
  • Such software may be distributed on a computer-readable medium, and the computer-readable medium may include a computer storage medium (or a non-transitory medium) and a communication medium (or a transitory medium).
  • the term computer storage medium includes volatile and non-volatile implementations in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Sexual, removable and non-removable media.
  • Computer storage media include but are not limited to RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, tapes, magnetic disk storage or other magnetic storage, or can be used Any other medium that can store desired information and can be accessed by a computer.
  • a communication medium usually contains computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium. .

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Abstract

Les modes de réalisation de la présente invention se rapportent au domaine technique des communications sans fil. L'invention concerne un procédé et un système de commutation de chemin primaire, un dispositif électronique et un support de stockage lisible par ordinateur. Le procédé de commutation de chemin primaire est appliqué à un premier nœud, connecté à un terminal, dans un scénario de double connectivité ou un scénario de multi-connectivité, et le premier nœud comprend une couche de protocole de convergence de données par paquets correspondant à un support de déchargement. Le procédé comprend : l'acquisition d'informations d'état de couche inférieure d'un nœud connecté à un terminal, dans lequel le nœud connecté au terminal comprend un premier nœud et au moins un second nœud qui ne comprend pas une couche de protocole de convergence de données par paquets correspondant à un support de déchargement, et les informations d'état de couche inférieure sont utilisées pour indiquer un état de liaison entre le terminal et le nœud; la détermination d'un chemin optimal selon les informations d'état de couche inférieure du nœud connecté au terminal; et la détermination du chemin optimal comme chemin primaire.
PCT/CN2021/100272 2020-06-18 2021-06-16 Procédé et système de commutation de chemin primaire, dispositif électronique et support de stockage lisible par ordinateur Ceased WO2021254362A1 (fr)

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