CN108810982B - Communication method, base station, user equipment and device with storage function - Google Patents

Communication method, base station, user equipment and device with storage function Download PDF

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CN108810982B
CN108810982B CN201710312051.1A CN201710312051A CN108810982B CN 108810982 B CN108810982 B CN 108810982B CN 201710312051 A CN201710312051 A CN 201710312051A CN 108810982 B CN108810982 B CN 108810982B
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communication
user equipment
communication mode
base station
sending
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CN108810982A (en
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夏欣
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Jiekai Communications Shenzhen Co Ltd
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Jiekai Communications Shenzhen Co Ltd
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Priority to CN202010498855.7A priority Critical patent/CN111866948B/en
Priority to CN201710312051.1A priority patent/CN108810982B/en
Priority to PCT/CN2017/107949 priority patent/WO2018201678A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H04W28/065—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information using assembly or disassembly of packets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0205—Traffic management, e.g. flow control or congestion control at the air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0284—Traffic management, e.g. flow control or congestion control detecting congestion or overload during communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1215—Wireless traffic scheduling for collaboration of different radio technologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols

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

Abstract

The invention discloses a communication method, a base station, user equipment and a device with a storage function, wherein the method comprises the following steps: the base station evaluates the transmission quality of at least two communication modes which can be selected by the user equipment to select at least one of the communication modes; and sending the selected at least one communication mode to the user equipment, so that the user equipment performs uplink communication by using the selected at least one communication mode. Through the mode, the uplink communication mode selected by the base station is sent to the user equipment, so that the user equipment can carry out uplink communication according to the communication mode selected by the base station, the transmission reliability can be further improved, the possibility of signal delay is reduced, and meanwhile, communication resources are reasonably distributed.

Description

Communication method, base station, user equipment and device with storage function
Technical Field
The present invention relates to the field of communications, and in particular, to a communication method, a base station, a user equipment, and a device with a storage function.
Background
With the development of a 5G NR (New Radio, New air interface) network, a situation will occur in which a 4G LTE (Long Term Evolution ) network and a 5G NR network are simultaneously connected to a UE (User Equipment). RAN2# NR ad hoc conference has agreed a "signaling Radio bearer" structure, and it is proposed that an RRC (Radio Resource Control protocol) message may be sent in one or both of LTE and NR communication modes, which may increase transmission reliability and reduce signal delay.
DL (Downlink transport channel) refers to a transport channel from the base station to the UE, and UL (Uplink transport channel) refers to a transport channel from the UE to the base station. The inventor of the present application found in long-term research and development that, when DL adopts a split SRB structure, a base station can select a communication method by itself, and when UL adopts a split SRB structure, a UE cannot independently complete selection of a communication method.
Disclosure of Invention
The technical problem mainly solved by the embodiments of the present invention is to provide a communication method, a base station, a user equipment and a device with a storage function, which can solve the problem of self-selection of a communication mode in a UL adopting a split SRB structure.
Embodiments of the present invention mainly solve the technical problem of providing a communication method, a base station, a user equipment, and a device with a storage function, which can solve the problem of enabling a packet data convergence protocol layer packet replication function in UL communication.
In order to solve the technical problems, the invention adopts a technical scheme that: there is provided a communication method including: the base station evaluates the transmission quality of at least two communication modes which can be selected by the user equipment to select at least one of the communication modes; and sending the selected at least one communication mode to the user equipment, so that the user equipment performs uplink communication by using the selected at least one communication mode.
In order to solve the technical problem, the invention adopts another technical scheme that: there is provided a communication method including: the method comprises the steps that user equipment receives a communication mode selection instruction from a base station, wherein the communication mode selection instruction carries at least one communication mode selected by the base station through evaluation of transmission quality of at least two communication modes which can be selected by the user equipment; and performing uplink communication by using the selected at least one communication mode.
In order to solve the technical problem, the invention adopts another technical scheme that: a base station comprising first processing circuitry and first communication circuitry electrically coupled to each other, the first processing circuitry being operable to execute instructions to implement a method as described above.
In order to solve the technical problem, the invention adopts another technical scheme that: a user equipment comprising second processing circuitry and second communication circuitry electrically coupled to each other, the second processing circuitry being operable to execute instructions to implement a method as described above.
In order to solve the technical problem, the invention adopts another technical scheme that: an apparatus having a storage function, storing instructions which, when executed, implement a method as described above.
In order to solve the technical problem, the invention adopts another technical scheme that: a method of communication, comprising: the base station detects an uplink communication mode to be carried out by the user equipment and confirms whether the uplink communication mode supports a packet data convergence protocol packet copying function or not; and if the uplink communication mode supports the packet data convergence protocol packet replication function, sending an activation instruction to the user equipment so that the user equipment adopts the packet data convergence protocol packet replication function during uplink communication.
In order to solve the technical problem, the invention adopts another technical scheme that: a method of communication, comprising: the method comprises the steps that user equipment receives an activation instruction from a base station, wherein the activation instruction is sent by the base station based on the fact that an uplink communication mode to be carried out by the user equipment supports a packet data convergence protocol packet copying function; the user equipment enables a packet data convergence protocol packet replication function in uplink communication.
In order to solve the technical problem, the invention adopts another technical scheme that: a base station comprising third processing circuitry and third communication circuitry electrically coupled to each other, the third processing circuitry being operable to execute instructions to implement the method described above.
In order to solve the technical problem, the invention adopts another technical scheme that: comprising a fourth processing circuit and a fourth communication circuit electrically coupled to each other, said fourth processing circuit being operable to execute instructions to implement a method as described above.
The invention has the beneficial effects that: different from the situation in the prior art, when the embodiment of the present invention is applied to the UL adopting the split SRB structure, at least one communication method can be selected for communication, the result of the selection by the base station can be reliably notified to the user equipment, the delay of the signal can be reduced, and the communication method can be dynamically adjusted according to the current communication quality, so as to reasonably allocate and utilize the communication resources.
In addition, an activation instruction is sent to the UE under the condition that the UL communication supports the packet data convergence protocol layer packet replication function, so that the UE enables the packet data convergence protocol layer packet replication function in the UL communication, and the reliability of communication transmission is enhanced.
Drawings
Fig. 1 is a schematic flow chart of a first embodiment of the communication method of the present invention;
FIG. 2 is a diagram illustrating a PDU (Protocol Data Unit) structure;
fig. 3 is a schematic diagram of a PDU structure with an instruction for selecting a communication mode in a first embodiment of the communication method of the present invention;
FIG. 4 is a diagram of a reference table one written by a selection instruction according to an embodiment of the communication method of the present invention;
FIG. 5 is a diagram of a second reference table written by a selection instruction according to an embodiment of the communication method of the present invention;
fig. 6 is a schematic flow chart of a second embodiment of the communication method of the present invention;
fig. 7 is a schematic structural diagram of a base station according to a first embodiment of the present invention;
fig. 8 is a schematic structural diagram of a first embodiment of a user equipment of the present invention;
fig. 9 is a schematic flow chart of a third embodiment of the communication method of the present invention;
FIG. 10 is a schematic diagram of a PDU structure carrying an activation instruction in a third embodiment of the communication method of the present invention
Fig. 11 is a schematic flow chart of a fourth embodiment of the communication method of the present invention;
fig. 12 is a schematic structural diagram of a second embodiment of the base station of the present invention;
fig. 13 is a schematic structural diagram of a second embodiment of a user equipment of the present invention;
FIG. 14 is a diagram of a protocol stack corresponding to a PDCP layer packet duplication function;
FIG. 15 is a schematic structural diagram of an embodiment of the apparatus with a storage function according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic flowchart of a communication method according to a first embodiment of the present invention, where the flow of the first embodiment of the communication method includes the following steps:
step 101: the base station evaluates the transmission quality of at least two communication modes which can be selected by the user equipment to select at least one of the communication modes;
in one embodiment, the base station includes an eNB (4G base station) and a gNB (5G base station), and in this embodiment, when the UE performs uplink transmission, a split SRB structure is adopted. The base stations are in wireless communication with each other, and the two base stations evaluate parameters such as signal strength, transmission speed and transmission signaling reliability of connection with the UE. In an application scenario, the eNB of the two base stations eNB and gNB is designated as a master base station, and the master base station selects one or two communication modes of LTE and NR as a UL communication mode according to an evaluation result.
Step 102: sending the selected at least one communication mode to the user equipment, so that the user equipment performs uplink communication by using the selected at least one communication mode;
specifically, the eNB as the master base station gives an instruction to the UE according to the result of the selection, for example, selects LTE as the communication scheme. In one application scenario, the selection instruction is carried in an RRC message for transmission. Since the RRC message transmission is very costly and therefore not frequent, the communication method is selected based on the quality of the current connection communication between the two base stations and the UE, which is time-efficient, and therefore the effective time of the message needs to be limited. Therefore, the RCC message carries, in addition to the selection instruction, the effective time for selecting this communication mode. Generally, a timing device is built in a UE, the UE reads effective time after receiving an RCC message carrying an instruction for selecting a communication mode, starts a built-in timing function while adopting the instruction carried by the RCC message, starts to count down with the read effective time as a limit, and after the timing time is over, the UE does not adopt the selected communication mode but adopts a communication mode with a default priority in the UE setting, such as NR.
In another application scenario, the instruction for selecting the communication mode is carried in a PDU (Protocol Data Unit) in a PDCP (Packet Data Convergence Protocol) layer. Referring to fig. 2, fig. 2 is a schematic diagram of a PDU (Protocol Data Unit). The D/C field of the PDC is used to indicate whether the PDC is a control PDU (C) or a data PDU (D), and whether the PDC is a data PDU or a control PDU, the D/C field may be used to carry an instruction for selecting a communication method. R denotes a reserved field, and the header of a general PDU has four reserved fields, two of which 11 and 12 are used by the present invention to carry an instruction for selecting a communication scheme. As shown in fig. 3, fig. 3 is a schematic diagram of a PDU structure of an instruction for writing 11, 12 fields with a communication mode selection instruction. 11. When a command for selecting a communication method is written, the original value of R (reserved field) is changed to S (selection command) 12.
Because the head of the PDU has idle reserved fields originally, the addition of the instruction for selecting the communication mode in the fields does not affect the originally transmitted data of the PDU and the reliability of transmission, thereby saving resources. The transmission of the PDU consumes less resources than the transmission of the RCC, and the transmission frequency of the PDU is more frequent than the transmission frequency of the RCC, so that the PDU in the PCDP is used for carrying the instruction for selecting the communication mode, and the timing can be carried out by the effective time without carrying the instruction.
The instruction for selecting the communication mode is carried in the PDU in the PDCP layer, the PDCP layer belongs to a data link layer and is positioned at the upper layer of the RRC layer belonging to the network upper layer, after the UE receives the PDU carrying the instruction for selecting the communication mode, the PDCP layer and the RRC layer can communicate, and the RRC layer can read the instruction for selecting the communication mode, so that the UE can carry out UL communication according to the communication mode selected by the base station.
In another application scenario, the instruction for selecting the communication mode is carried in a MAC CE (Control Element) of a MAC (Media Access Control) layer. Since the MAC CE transmits less resources and more frequently than the RRC, when the MAC CE is used to carry a command for selecting a communication scheme, it is not necessary to limit the validity period of the command.
The command for selecting the communication mode is carried in the MAC CE in the MAC layer, the MAC layer belongs to the data link layer and is positioned at the upper layer of the RRC layer belonging to the network upper layer, after the UE receives the MAC CE carrying the command for selecting the communication mode, the MAC layer and the RRC layer can communicate, and the RRC layer can read the command for selecting the communication mode, so that the UE can carry out UL communication according to the communication mode selected by the base station.
As can be seen from the above description, the embodiment of the present invention uses the PDU and the MAC CE in the RCC or the PDCP to carry the instruction for selecting the communication mode, and transmits the instruction to the UE through DL communication, so as to help the UE to select a suitable communication mode to perform UL communication using the split SRB structure, and the method is simple and feasible, and does not waste resources.
Referring to fig. 4 and 5 in combination, fig. 4 is a first reference table written by the selection instruction of the present invention, and fig. 5 is a second reference table written by the selection instruction of the present invention. In the prior art, there are three options for the communication mode: LTE, NR, Both. Therefore, a space of 2 bits is required in binary to represent the selected communication method, for example, 00(LTE), 01(NR), 10 (Both). The embodiment of the invention provides a new method for representing the selected communication mode, and only 1bit of transmission resources are needed.
In fig. 4, L represents LTE, N represents NR, and B represents bouh, and they are arranged in the UE in a certain order, and one of them represents the current communication method, and the letters (front and rear letters) on Both sides adjacent to the letter are selectable communication methods. For example, if the current communication method is NR and the selected communication method is LTE, the current selected position is set to be backed by one bit, and in this embodiment, the content of the transmission command is "0" since "0" indicates one bit of back; if the current communication mode is NR and the selected communication mode is bouh, the current position is advanced by one bit, which is represented by "1" in this embodiment, and therefore the content of the transmitted command is "1".
By analogy, if the current communication method is LTE and the selected communication method is Both, the content of the transmitted command is "0", and if the selected communication method is NR, the content of the transmitted command is "1"; if the current communication method is Both and the selected communication method is NR, the transmitted command content is "0", and if the selected communication method is LTE, the transmitted command content is "1". Specific contents can refer to fig. 5. When the selected communication mode is the same as the current communication mode, no instruction is sent, and the UE may maintain the current communication mode to perform UL communication.
In other embodiments, L, N, B are not necessarily ordered in the same manner as in FIG. 4, and "0" and "1" are not necessarily intended to be equivalent to FIG. 5.
In this embodiment, the communication modes that the base station can select for the UE are arranged into a sequence as shown in fig. 4, and the sequence is sent to the UE during downlink communication, the UE receives and stores the sequence, and when receiving a selection instruction sent by the base station, the UE selects the UL communication mode according to the current communication mode in the stored sequence and the position direction indicated by the selection instruction. In other embodiments, the operation of arranging the sequence of the communication schemes may be set in advance by the UE and notified to the base station, or a sequence of a unified communication scheme may be set in the base station and the UE.
In other embodiments, the base station and the UE do not necessarily need to rank the three communication modes of LTE, NR, and Both, but need only establish a table similar to fig. 5, and select what instruction contents the other two communication modes respectively need to send when a certain communication mode is defined in the table as the current communication mode.
As can be seen from the above description, in the embodiment of the present invention, the instruction sent to the UE is edited by comparing the position relationship (forward or backward) between the selected communication mode and the current communication mode in the table sequence, and in some cases, the selected communication mode can be expressed only with 1bit of transmission resources. The space of the instruction can be saved, and the resources are saved.
Referring to fig. 6, fig. 6 is a flowchart illustrating a second embodiment of the communication method according to the present invention, wherein the second embodiment of the communication method includes the following steps:
step 601: the method comprises the steps that user equipment receives a communication mode selection instruction from a base station, wherein the communication mode selection instruction carries at least one communication mode selected by the base station through evaluation of transmission quality of at least two communication modes which can be selected by the user equipment;
referring to fig. 1 in conjunction, the communication scheme is obtained by comparing the transmission quality of the main base station with that of the base stations of the other communication schemes to which the UE can selectively connect. The selection instruction is edited by the main base station and is carried by an RCC message, a PDU of a PDCP, a MAC CE or other messages so as to facilitate the receiving of the UE.
Step 602: performing uplink communication by using the selected at least one communication mode;
specifically, after receiving the RCC message carrying the selection instruction, the PDU of the PDCP, the MAC CE, or other messages, the UE reads the content of the selection instruction from the messages, for example, the RCC layer PDCP layer or the MAC layer performs communication to obtain the instruction of the UL communication mode. And after reading the instruction, the UE selects a communication mode according to the content of the instruction to carry out UL communication.
As can be seen from the above description, in the second embodiment of the communication method of the present invention, the UE receives the instruction of the communication mode selected by the base station through evaluation, and selects the communication mode according to the instruction to perform UL communication, so that the UL communication mode can be dynamically adjusted, which is beneficial to reasonably allocating communication resources, and the instruction content carried in other messages can be read, so that transmission space can be saved, and resource waste is not caused.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a base station 70 according to an embodiment of the present invention, and the base station includes a first processing circuit 71 and a first communication circuit 72. The first communication circuit 72 is used for communication with a communication circuit of another base station, and knows the communication quality of each other, and evaluates the quality of each other by the calculation of the first processing circuit 71, and selects an appropriate communication scheme. The first processing circuit 71 edits the command according to the selected communication method, and carries the command in the RCC message, the PDU of the PDCP or the MAC CE, and the first communication circuit 72 transmits the message carrying the command of the selected communication method to the UE.
As can be seen from the above description, the first embodiment of the base station of the present invention receives the communication signals of other base stations through the first communication circuit, obtains a suitable UL communication mode through the operation of the first processing circuit, edits the communication mode into an instruction, carries the instruction in other messages, and sends the instruction to the UE through the first communication circuit, so that the communication resources can be reasonably allocated without occupying other communication spaces.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a ue according to an embodiment of the present invention. The user equipment 80 comprises a second processing circuit 81 and a second communication circuit 82. The second communication circuit 82 is configured to receive a message from the base station, the message carrying an instruction to select a communication mode. The second processing circuit 81 is configured to read an instruction for selecting a communication method from the message received by the second communication circuit 82, and perform UL communication according to the communication method selected by the instruction.
As can be seen from the above description, the first embodiment of the UE of the present invention receives, through the second communication circuit, a message carrying an instruction for selecting a communication mode, reads the instruction through the second processing circuit, and controls the UE to perform UL communication in the selected communication mode according to the instruction, which can help to dynamically adjust the communication mode, facilitate reasonable allocation of communication resources, and read the instruction carried in other messages, thereby effectively saving resources consumed by sending the instruction.
Referring to fig. 9, fig. 9 is a flowchart illustrating a communication method according to a third embodiment of the present invention. A third embodiment of the communication method of the present invention comprises the steps of:
step 901: the base station detects an uplink communication mode to be carried out by the user equipment and confirms whether the uplink communication mode supports a packet data convergence protocol layer packet replication function or not;
specifically, in the NR communication scheme, the UE supports the packet data convergence protocol layer packet duplication function. Therefore, the base station needs to detect the upcoming UL communication mode of the UE, and if the upcoming UL communication mode of the UE is LTE or another communication mode that does not support packet data convergence protocol layer packet replication, no activation instruction is sent to the UE, so as to avoid wasting resources;
step 902: if the uplink communication mode supports the packet data convergence protocol packet copying function, sending an activation/deactivation instruction to the user equipment so that the user equipment activates/deactivates the packet data convergence protocol packet copying function during uplink communication;
specifically, if the upcoming UL communication mode of the UE is NR, it means that the UE can enable the packet data convergence protocol layer packet duplication function in the upcoming UL communication mode, and meanwhile, the base station needs to determine whether the UE needs to enable the packet data convergence protocol layer packet duplication function in the upcoming UL communication, and if so, the base station sends an activation instruction to the UE, and if not, sends an activation instruction.
In an application scenario, the activation instruction is carried in a PDU (Protocol Data Unit) in a PDCP (Packet Data Convergence Protocol) layer. Referring to fig. 2, fig. 2 is a schematic diagram of a PDU (Protocol Data Unit). The D/C field of a PDC is used to indicate whether the PDC is a control PDU (C) or a data PDU (D). R denotes a reserved field, and the header of a general PDU has four reserved fields, two of which 11 and 12 are used by the present invention to carry an instruction for selecting a communication scheme. As shown in fig. 10, fig. 10 is a schematic diagram of a PDU structure of an instruction for writing 11 and 12 fields with a communication mode selection instruction. 11. The original R (reserved field) of 12 is changed to a (active command) after the command for selecting the communication method is written. In other embodiments, not necessarily two fields are modified, but one, three or four fields are possible.
Because the head of the PDU has idle reserved fields originally, the addition of the instruction for selecting the communication mode in the fields does not affect the originally transmitted data of the PDU and the reliability of transmission, thereby saving resources. The transmission of the PDU consumes less resources than the transmission of the RCC, and the transmission frequency of the PDU is more frequent than the transmission frequency of the RCC, so that the PDU in the PCDP is used for carrying the instruction for selecting the communication mode, and the timing can be carried out by the effective time without carrying the instruction.
And after receiving the PDU containing the activation instruction, the UE reads the activation instruction in the PDU, and starts a packet data convergence protocol layer packet replication function when carrying out UL communication.
The method for sending the deactivation command is the same as the method for sending the activation command, but the command content is different, and therefore, the details are not described herein. And after receiving the PDU containing the deactivation instruction, the UE reads the deactivation instruction in the PDU, and deactivates the packet data convergence protocol layer packet replication function when carrying out UL communication.
It can be known from the above description that the present invention can effectively save resources by carrying the activation instruction for enabling the packet data convergence protocol layer packet duplication function on the header of the PDU, and can increase the reliability of communication transmission by enabling the packet data convergence protocol layer packet duplication function.
Referring to fig. 11, fig. 11 is a flowchart illustrating a fourth embodiment of the communication method according to the present invention, wherein the fourth embodiment of the communication method according to the present invention includes the following steps:
step 1101: the method comprises the steps that user equipment receives an activation/deactivation instruction from a base station, wherein the activation/deactivation instruction is sent by the base station based on the fact that an uplink communication mode to be carried out by the user equipment supports a packet data convergence protocol layer packet replication function;
referring to fig. 9, since the UE cannot independently enable the packet data convergence protocol layer packet duplication function in the UL communication and the packet data convergence protocol layer packet duplication function is currently supported only in the NR communication mode, the base station first needs to detect whether the NR communication mode is selected for the UL communication to be performed by the UE, and if so, the base station issues an activation instruction for the packet data convergence protocol layer packet duplication function. The activation instruction may be carried by a data PDU of the PDCP and stored in a header of the PDU.
Step 1102: the user equipment enables/disables a packet data convergence protocol layer packet duplication function in uplink communication.
In an application scenario, after receiving a PDU carrying an activation instruction, a UE reads the content of the activation instruction at the head of the PDU, and enables a packet data convergence protocol layer packet replication function in UL communication. A schematic diagram of a protocol stack corresponding to the function of enabling packet data convergence protocol layer packet duplication is shown in fig. 14, where two identical data units PDCP PDUs 1 are sent by the PDCP layer through two different links, and reach the physical layer through the MAC layer. Similarly, the communication between the physical layer and the MAC and PDCP layers is also transmitted over two different links. In other embodiments, the data packets can be transmitted on three or more links simultaneously, which effectively improves the reliability of transmission.
In other application scenarios, after receiving the PDU carrying the deactivation command, the UE reads the contents of the deactivation command at the head of the PDU, and deactivates the packet data convergence protocol layer packet replication function in UL communication.
As can be seen from the above description, the UE in the fourth embodiment of the present invention can receive the activation and deactivation command carried in the PDU header and sent by the base station, so as to correspondingly activate and deactivate the packet data convergence protocol layer packet duplication function in the UL communication, thereby improving the transmission reliability and saving resources.
Referring to fig. 12, fig. 12 is a schematic structural diagram of a base station 120 according to a second embodiment of the present invention, and the base station includes a third processing circuit 121 and a third communication circuit 122. The third communication circuit 122 is configured to communicate with the UE, the third processing circuit 121 detects whether the UL communication to be performed by the UE supports the packet data convergence protocol layer packet duplication function, if so, continuously determines whether the packet data convergence protocol layer packet duplication function needs to be enabled, and if so, carries an activation instruction for enabling the packet data convergence protocol layer packet duplication function on a header of the PDU, and the third communication circuit 122 sends the PDU carrying the activation instruction to the UE. If the deactivation command for deactivating the packet data convergence protocol layer packet duplication function does not need to be carried in the header of the PDU, the third communication circuit 122 sends the PDU carrying the deactivation command to the UE.
As can be seen from the above description, the second embodiment of the base station of the present invention detects, through the third communication circuit, the UL communication mode to be performed by the UE, and determines, through the third processing circuit, whether the communication mode supports the packet data convergence protocol layer packet duplication function, and if so, continues to determine whether the packet data convergence protocol layer packet duplication function needs to be enabled, and then carries the activation/deactivation command in the PDU to send to the UE, so as to save resources and enhance transmission reliability.
Referring to fig. 13, fig. 13 is a schematic structural diagram of a ue according to a second embodiment of the present invention,
the user equipment 130 comprises a fourth processing circuit 131 and a fourth communication circuit 132. The fourth communication circuit 132 is configured to receive a PDU carrying an activation/deactivation command from the base station. The fourth processing circuit 131 is configured to read an activation/deactivation command from the PDU received by the fourth communication circuit 132, and accordingly enable/disable the packet data convergence protocol layer packet duplication function in UL communication.
As can be seen from the above description, the second embodiment of the ue of the present invention receives the PDU carrying the activation/deactivation command through the fourth communication circuit, reads the command through the fourth processing circuit, and accordingly activates/deactivates the packet data convergence protocol layer packet duplication function in the UL communication, thereby effectively enhancing the reliability of transmission. And the instruction carried in other messages is read, so that the resource consumed by sending the instruction can be effectively saved.
Referring to fig. 15, fig. 15 is a schematic structural diagram of an embodiment of a device with storage function according to the present invention, in which at least one program or instruction 151 is stored in the device with storage function 150, and the program 151 or instruction is used to execute the communication method shown in fig. 1, fig. 6, fig. 9 and fig. 11. In one embodiment, the apparatus with storage function may be a storage chip in a terminal, a hard disk, or a removable hard disk or other readable and writable storage tool such as a flash disk, an optical disk, or the like, and may also be a server or the like.
As can be seen from the above description, the program or the instructions stored in the embodiment of the apparatus with storage function of the present invention may be used to select the UL communication method and send the result of the selection, so that the UE performs UL communication according to the result of the selection. The program or the instruction stored in the embodiment of the apparatus with storage function of the present invention can also be used to determine whether the pending UL communication supports the packet data convergence protocol layer packet duplication function, and send an activation/deactivation instruction if supported, so that the packet data convergence protocol layer packet duplication function is correspondingly activated/deactivated in the UL communication of the user equipment.
Different from the prior art, the embodiment of the invention adopts the split SRB structure, can select one or two of LTE and NR as the UL communication mode, improves the reliability of UL communication and reduces the delay of signal transmission. And the communication modes can be dynamically adjusted based on the quality of the two current communication modes, so that the communication resources are reasonably distributed and utilized, and the resource waste is reduced. Meanwhile, the selection instruction can occupy the transmission resource of the minimum data bit, and the resource is further saved.
In addition, the embodiment of the invention informs the UE to start in the UL communication under the condition that the UL communication mode supports the packet data convergence protocol layer packet replication function, thereby improving the transmission reliability.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (14)

1. A method of communication, comprising:
the base station evaluates the transmission quality of at least two communication modes which can be selected by the user equipment to select at least one of the communication modes;
forming a sequence of the at least two communication modes which can be selected for use and the combination thereof according to a certain sequence, and sending the sequence to the user equipment;
sending the selected at least one communication mode to the user equipment, so that the user equipment performs uplink communication by using the selected at least one communication mode;
the sending the selected at least one of the communication modes to the user equipment comprises:
obtaining a communication mode selection instruction based on the position relation between the current communication mode of the user equipment and the selected at least one communication mode in the sequence, wherein the communication mode selection instruction is carried by one bit of data;
and sending the communication mode selection instruction to the user equipment so as to enable the user equipment to communicate by using the communication mode to which the relation points, wherein the communication mode selection instruction comprises at least one of a radio resource control protocol message, a control protocol data unit/data protocol data unit in a packet data convergence protocol and a control element MAC CE of an access control layer.
2. The method of claim 1,
the sending the selected at least one of the communication modes to the user equipment comprises:
and sending the selected at least one communication mode to the user equipment through a radio resource control protocol message.
3. The method of claim 2,
the sending, to the ue, the selected at least one of the communication modes via a rrc protocol message, simultaneously or sequentially, further includes:
and sending the effective use time length of the selected at least one communication mode to the user equipment, so that the user equipment only uses the selected at least one communication mode for communication within the effective use time length.
4. The method of claim 3,
the effective usage time length and the selected at least one of the communication modes are carried by the same rrc message.
5. The method of claim 1,
the sending the selected at least one of the communication modes to the user equipment comprises:
and sending the selected at least one communication mode to the user equipment through a control protocol data unit in a packet data convergence protocol.
6. The method of claim 1,
the sending the selected at least one of the communication modes to the user equipment comprises:
and sending the selected at least one communication mode to the user equipment through a data protocol data unit in a packet data convergence protocol.
7. The method of claim 6, wherein the selected at least one of the communication modes is carried by a header of the data protocol data unit.
8. The method of claim 1,
the sending the selected at least one of the communication modes to the user equipment comprises:
and sending the selected at least one communication mode to the user equipment through a control element of a medium access control layer.
9. The method according to any one of claims 1 to 8,
the at least two communication modes which can be selected and used comprise a long term evolution network and a new air interface network.
10. A method of communication, comprising:
the user equipment receives a communication mode selection instruction and a sequence from a base station, wherein the communication mode selection instruction carries at least one communication mode selected by the base station by evaluating the transmission quality of at least two communication modes which can be selected by the user equipment, the sequence is composed of at least two communication modes which can be selected for use and the combination thereof according to a certain sequence, the communication mode selection instruction is obtained based on the position relation between the current communication mode of the user equipment and the selected at least one communication mode in the sequence, the communication mode selection instruction is carried by one bit of data bit, and comprises at least one of a radio resource control protocol message, a control protocol data unit/data protocol data unit in a packet data convergence protocol and a control element MAC CE of an access control layer;
and performing uplink communication by using the selected at least one communication mode.
11. The method of claim 10,
the user equipment further receives the effective usage time length of the selected at least one communication mode from the base station;
the performing uplink routing using the selected at least one communication method includes: and performing uplink communication by using the selected at least one communication mode only in the effective use time length.
12. A base station comprising first processing circuitry and first communication circuitry electrically coupled to each other, the first processing circuitry being operable to execute instructions to implement the method of any of claims 1 to 9.
13. A user equipment comprising a second processing circuit and a second communication circuit electrically coupled to each other, the second processing circuit in operation executing instructions to implement the method of any of claims 10-11.
14. An apparatus having storage functionality, wherein instructions are stored, which when executed, implement the method of any of claims 1-9, 10-11.
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