CN112825496B

CN112825496B - Processing method and device for time information transmission and storage medium

Info

Publication number: CN112825496B
Application number: CN201911148304.1A
Authority: CN
Inventors: 孙军帅
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2021-11-19
Anticipated expiration: 2039-11-21
Also published as: WO2021098375A1; CN112825496A

Abstract

The invention discloses a processing method, a processing device, processing equipment and a storage medium for time information transmission. Wherein the method comprises the following steps: receiving a non-access stratum (NAS) Protocol Data Unit (PDU); and determining that the NAS PDU contains time information, and transmitting the time information to the second communication equipment through a Signaling Radio Bearer (SRB) in a transparent transmission mode, or transmitting the time information to the second communication equipment on the SRB according to an instruction. The embodiment of the invention can reduce the transmission time delay of the time information and improve the precision of time synchronization.

Description

Processing method and device for time information transmission and storage medium

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a method, an apparatus, and a storage medium for processing time information transmission.

Background

In the related art, when the IIOT (Industrial Internet) topic of 3GPP (third generation partnership project) is studied, it is one of the key requirements of Industrial communication to transmit data timely and safely. How to connect the industrial equipment to a TSN (Time Sensitive network) in a wireless manner to satisfy the flexible deployment of the industrial equipment and timely and safe data transmission is a technical problem to be solved urgently.

Disclosure of Invention

In view of this, embodiments of the present invention provide a method, an apparatus, and a storage medium for processing time information transmission, which aim to meet the time synchronization requirement of flexibly arranged industrial devices.

The technical scheme of the embodiment of the invention is realized as follows:

the embodiment of the invention provides a processing method for time information transmission, which is applied to first communication equipment and comprises the following steps:

receiving a Non-access stratum (NAS) Protocol Data Unit (PDU);

determining that the NAS PDU contains time information, and transmitting the time information to the second communication equipment through a Signaling Radio Bearers (SRB) in a transparent transmission mode, or transmitting the time information to the second communication equipment on the SRB according to an instruction.

In the foregoing solution, the transmitting the time information to the second communication device through the SRB in the transparent transmission mode includes:

the Radio Resource Control (RRC) layer transmits the time information to a Media Access Control (MAC) layer through the SRB in a transparent transmission mode;

and the MAC layer puts the time information into an MAC PDU and sends the MAC PDU.

In the above scheme, the method further comprises:

setting configuration parameters in the process of establishing RRC connection or RRC reconfiguration, and generating the SRB in the transparent transmission mode; the configuration parameters include: the method comprises the steps of transmitting a first configuration parameter corresponding to a Packet Data Convergence Protocol (PDCP) layer and/or a second configuration parameter corresponding to a Radio Link Control (RLC) layer.

In the foregoing solution, the transmitting the time information to the second communication device on the SRB according to the indication includes:

the RRC layer passes the NAS PDU and the first identity to one of: a PDCP layer, an RLC layer and an MAC layer;

if the NAS PDU and the first identifier are transferred to a PDCP layer by the RRC layer, and the PDCP layer determines that the first identifier is valid, the PDCP layer transfers the NAS PDU and the second identifier to an RLC layer; when the RLC layer determines that the second identifier is valid, the RLC layer transmits the NAS PDU and a third identifier to an MAC layer, and when the MAC layer determines that the third identifier is valid, the time information is put into an MAC PDU with a valid transparent transmission identifier, and the MAC PDU is sent; alternatively, the first and second electrodes may be,

if the NAS PDU and the first identifier are transferred to a PDCP layer by the RRC layer, and the PDCP layer determines that the first identifier is valid, the PDCP layer transfers the NAS PDU and the second identifier to an MAC layer; when the MAC layer determines that the second identifier is valid, the MAC layer puts the time information into an MAC PDU with a valid transparent transmission identifier and sends the MAC PDU; alternatively, the first and second electrodes may be,

if the RRC layer transmits the NAS PDU and the first identifier to the RLC layer, the RLC layer transmits the NAS PDU and the second identifier to the MAC layer when determining that the first identifier is valid, and the MAC layer puts the time information into the MAC PDU with the valid transparent transmission identifier and transmits the MAC PDU when determining that the second identifier is valid; alternatively, the first and second electrodes may be,

and if the NAS PDU and the first identifier are transmitted to an MAC layer by the RRC layer, and the MAC layer puts the time information into the MAC PDU with the effective transparent transmission identifier and transmits the MAC PDU when the first identifier is determined to be effective by the MAC layer.

In the above scheme, the MAC layer sends the MAC PDU to an air interface through a radio resource of a physical layer or copies the MAC PDU into multiple copies and sends the multiple copies to the air interface.

The embodiment of the invention also provides a processing method for time information transmission, which is applied to second communication equipment and comprises the following steps:

receiving MAC PDU carrying time information;

determining that the transparent transmission identifier carried by the MAC PDU is effective, and bearing the time information through an SRB under the indication of the identifier; or, determining that the transparent transmission identifier carried by the MAC PDU is invalid, and carrying the time information through the SRB in the transparent transmission mode.

In the foregoing solution, the carrying the time information through the SRB under the indication of the identifier includes:

the MAC layer transmits the time information to the RRC layer through indication;

the RRC layer transfers the time information to the NAS.

In the foregoing solution, the loading the time information by the SRB in the transparent transmission mode includes:

the MAC layer transmits the time information to the RRC layer through the SRB in the transparent transmission mode;

the RRC layer transfers the time information to the NAS.

In the above scheme, the method further comprises:

setting configuration parameters in the process of establishing RRC connection or RRC reconfiguration, and generating the SRB in the transparent transmission mode; the configuration parameters include: a third configuration parameter corresponding to the PDCP layer and/or a fourth configuration parameter corresponding to the RLC layer.

An embodiment of the present invention further provides a processing apparatus for time information transmission, which is applied to a first communication device, and the apparatus includes:

a first receiving module, configured to receive a NAS PDU;

and the sending module is used for determining that the NAS PDU contains time information, and transmitting the time information to the second communication equipment through the SRB in the transparent transmission mode or transmitting the time information to the second communication equipment on the SRB according to the indication.

In the foregoing solution, the sending module sends the time information to the second communication device through the SRB in the transparent transmission mode, including:

the RRC layer transmits the time information to the MAC layer through the SRB in the transparent transmission mode;

In the above scheme, the apparatus further comprises:

a first configuration module, configured to set configuration parameters in a process of establishing RRC connection or a process of RRC reconfiguration, and generate an SRB in the transparent transmission mode; the configuration parameters include: the first configuration parameters corresponding to the PDCP layer and/or the second configuration parameters corresponding to the RLC layer.

In the foregoing solution, the sending module, according to an instruction, transmits the time information to the second communication device on the SRB, including:

if the NAS PDU and the first identifier are transferred to a PDCP layer by the RRC layer, and the PDCP layer determines that the first identifier is valid, the PDCP layer transfers the NAS PDU and the second identifier to an RLC layer; when the RLC layer determines that the second identifier is valid, the RLC layer transmits the NAS PDU and a third identifier to an MAC layer; when the MAC layer determines that the third identifier is valid, the MAC layer puts the time information into an MAC PDU with a valid transparent transmission identifier and sends the MAC PDU; alternatively, the first and second electrodes may be,

In the foregoing scheme, the sending module is further configured to:

and the MAC layer transmits the MAC PDU to an air interface through wireless resources of a physical layer or copies the MAC PDU into a plurality of parts and transmits the parts to the air interface.

The embodiment of the invention also provides a processing device for time information transmission, which is applied to second communication equipment, and the device comprises:

the second receiving module is used for receiving the MAC PDU carrying the time information;

the first transmission module is used for determining that the transparent transmission identifier carried by the MAC PDU is effective, and bearing the time information through the SRB under the indication of the identifier;

and the second transmission module is used for determining that the transparent transmission identifier carried by the MAC PDU is invalid and bearing the time information through the SRB in the transparent transmission mode.

In the foregoing solution, the first transmission module is further configured to:

the RRC layer transfers the time information to the NAS.

In the foregoing solution, the second transferring module is further configured to:

the RRC layer transfers the time information to the NAS.

In the above scheme, the apparatus further comprises:

a second configuration module, configured to set configuration parameters in a process of establishing an RRC connection or in a process of RRC reconfiguration, and generate an SRB in the transparent transmission mode; the configuration parameters include: a third configuration parameter corresponding to the PDCP layer and/or a fourth configuration parameter corresponding to the RLC layer.

An embodiment of the present invention further provides a first communication device, including: a processor and a memory for storing a computer program operable on the processor, wherein the processor, when executing the computer program, is configured to perform the steps of the method described in the first communication device side of the embodiment of the present invention.

An embodiment of the present invention further provides a second communications device, including: a processor and a memory for storing a computer program capable of running on the processor, wherein the processor, when running the computer program, is configured to perform the steps of the method described in the second communication device side of the embodiment of the present invention.

The embodiment of the invention also provides a storage medium, wherein a computer program is stored on the storage medium, and when the computer program is executed by a processor, the steps of the method of any embodiment of the invention are realized.

According to the technical scheme provided by the embodiment of the invention, the first communication equipment receives the NAS PDU, determines that the NAS PDU contains the time information, and transmits the time information to the second communication equipment through the SRB in the transparent transmission mode or transmits the time information to the second communication equipment on the SRB according to the indication, so that the transmission delay of the time information can be reduced, and the precision of time synchronization is improved.

Drawings

Fig. 1 is a flowchart illustrating a processing method for transmitting time information at a first communication device side according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a processing method for transmitting time information at a second communication device side according to an embodiment of the present invention;

fig. 3 is a schematic diagram of an embodiment of the present invention according to a principle of carrying a data packet of the time frame control information on the SRB;

fig. 4 is a schematic structural diagram of a processing apparatus for transmitting time information on a first communication device side according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a processing apparatus for transmitting time information on a second communication device side according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a first communication device according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a second communication device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

In the related art, the TSN needs to transmit time information to ensure that the time of each node is strictly synchronized, and the time precision does not exceed 50 ns. RAN (Radio Access Network, Access Network) is introduced as a transmission node of the TSN to connect User Equipment (UE) to the TSN, and it is required that a time frame control information packet is transmitted between a base station and the UE or between the base station and the base station to meet a set delay requirement.

Based on this, in various embodiments of the present invention, the time information is transmitted to the next communication node through the SRB in the transparent transmission mode, or the time information is transmitted to the next communication node on the SRB according to the indication, so that the transmission delay of the time information can be reduced, and the accuracy of time synchronization is improved.

An embodiment of the present invention provides a processing method for time information transmission, which is applied to a first communication device, and as shown in fig. 1, the method includes:

step 101, receiving NAS PDU;

here, the first communication device may be a network device or a terminal device. Taking the base station as an example for explanation, the base station receives a time frame control information data packet sent by a Core Network (CN) in a NAS PDU form, where the time frame control information data packet carries at least time information for time synchronization. And when the core network sends the NAS PDU, the NAS PDU is indicated as a time frame control information data packet through the associated route identification.

And step 102, determining that the NAS PDU contains time information, and transmitting the time information to the second communication equipment through the SRB in the transparent transmission mode or transmitting the time information to the second communication equipment on the SRB according to an instruction.

The first communication device determines that the NAS PDU contains time information according to the channel associated identification, namely the NAS PDU is a time frame control information data packet with the time information, and transmits the time information to the second communication device through the SRB in the transparent transmission mode or transmits the time information to the second communication device on the SRB according to the indication. Here, the second communication device may be a network device or a terminal device that is communicatively connected to the first communication device. If the NAS PDU is not a time frame control information data packet, processing according to an existing processing mode.

In an embodiment, the transmitting the time information to the second communication device through the SRB in the transparent transmission mode includes:

In practical applications, the first communication device is taken as a base station, and the second communication device is taken as User Equipment (UE) for example. And establishing SRB of Transparent Mode (TM) between the base station and the user equipment. In the transparent transmission mode, the function of PDCP is defined as: and directly sending any PDCP SDU loaded in the RB of the transparent transmission mode to the RLC in a PDCP PDU mode without adding any content, carrying out operations such as encryption, header compression, integrity protection and the like. RLC adds processing to the DCCH (dedicated control channel) that can transport NAS messages in the transparent mode. In the embodiment of the invention, when a PDCP protocol entity (also called a PDCP layer) of the SRB is established, a transparent transmission mode is directly established, and the transparent transmission mode of the RLC supports the processing of a DCCH.

When the RRC layer uses the SRB in the transparent transmission mode to transmit data, the RRC SDU (namely NAS PDU) is directly transmitted to the PDCP layer in the mode of RRC PDU, the RRC layer does not carry out ASN.1 coding, and attached RRC control information is not added. The PDCP layer does not process PDCP SDU (i.e., RRC PDU), i.e., the PDCP layer does not assign SN to PDCP SDU, does not start transmission window, does not set buffer function for the packet, and directly transfers PDCP SDU to the RLC layer in the form of PDCP PDU. The RLC layer does not process RLC SDUs (i.e., PDCP PDUs), and directly delivers the RLC SDUs to the MAC layer in the form of RLC PDUs.

In one embodiment, in the transparent transmission mode, it is considered that the contents of the RRC PDU are not changed after passing through the PDCP layer and the RLC layer. To save transmission time, the RRC layer may directly transmit the RRC PDU to the MAC layer together with the corresponding SRB ID.

And the MAC layer receives a time frame control information data packet, puts the time frame control new data packet into an MAC PDU and transmits the MAC PDU.

In practical application, the MAC layer may schedule the data packet (i.e., the MAC PDU with time information) on the first available air interface frequency domain resource and time domain resource according to a QoS (Quality of Service) parameter of the SRB, such as a GBR (Guaranteed Bit Rate), Latency (delay), or an identifier of the SRB configured in another manner, which requires high priority scheduling, such as an indication of directly sending an uplink scheduling priority to the MAC via the RRC.

In actual application, the MAC layer may send the MAC PDU to an air interface through a radio resource of a physical layer. In an embodiment, the MAC layer may copy the MAC PDU into multiple copies through radio resources of a physical layer and send the multiple copies to an air interface. When the MAC sends a plurality of MAC PDUs, the MAC can send the PDUs at one time simultaneously or send the PDUs for a plurality of times. In an embodiment, when the MAC layer transmits the MAC PDU by using a multiplexing transmission (multiplexing) method, the MAC PDU is placed on a plurality of carriers by using a CA (Carrier Aggregation) method and is simultaneously transmitted to the air interface. The number of transmissions of the HARQ (hybrid automatic repeat request) process transmitting the data is set to 1 or other value on each carrier, i.e. no retransmissions are made to reduce delay and jitter. In another embodiment, the MAC may also use physical layer radio resources in non-carrier aggregation techniques when transmitting multiple MAC PDUs.

In order to send out the time information through the SRB in the transparent transmission mode, in an embodiment, the method further includes:

setting configuration parameters in the process of establishing RRC connection (RRC connection establishment) or in the process of RRC Reconfiguration (RRC Reconfiguration), and generating the SRB in the transparent transmission mode. The configuration parameters include: and the first configuration parameter corresponding to the PDCP layer and/or the second configuration parameter corresponding to the RLC layer is controlled by the radio link.

Here, the first configuration parameter is used to set a pass-through mode at the time of PDCP layer setup, and the second configuration parameter is used to increase the processing of DCCH in the pass-through mode of the RLC layer. In this way, the transparent mode of RLC may be transmitted "transparently" to the underlying MAC layer for data delivered on DCCH.

In an embodiment, the transmitting the time information to the second communication device on the SRB according to the indication includes:

Here, the SRB of the pass-through mode may not need to be generated, but the time frame control information packet may be transmitted from the RRC layer to the MAC layer using the identification.

In practical application, the RRC layer receives the NAS PDU sent by the core network, judges the data packet type of the NAS PDU according to the channel associated identification, and directly transmits the RRC SDU (namely the NAS PDU) to the PDCP layer in a mode of the RRC PDU and carries the first identification along with the channel when the NAS PDU is determined to be the data packet of the time frame control information. The PDCP layer determines that the first identifier value is valid, and the PDCP layer directly sends the received PDCP SDU (i.e., RRC PDU) to the RLC layer in the PDCP PDU mode without adding any content, ciphering, header compression, integrity inclusion, and the like, and carries the second identifier along with the path. If the RLC layer determines that the second identifier value is valid, the RLC layer does not process the received RLC SDU (i.e., PDCP PDU), directly sends the RLC SDU to the MAC layer in the form of RLC PDU, and carries a third identifier along with the path.

It should be noted that, in an embodiment, the first identifier, the second identifier, and the third identifier may use the same associated identifier, so as to simplify the processing procedure of the associated. Here, the identification is valid, which means that the identification indicates that the transmitted data packet is a data packet with time information, otherwise, the identification is invalid.

The MAC layer determines that the received third identifier is valid, and in order to correctly analyze the data packet at the UE side, it needs to send the indication information of the transparent transmission (i.e., the transparent transmission identifier) to the UE. In practical application, an identification bit indication domain is reserved in a PDU head of the MAC PDU, when the MAC layer determines that a channel associated identification of a received time frame control information data packet is effective, the identification bit indication domain is set to be effective, and the time frame control information data packet is put into the MAC PDU with the effective transparent transmission identification. The mark length is at least one bit, 0 denotes an invalid value, and 1 denotes an effective value.

In practical application, an r (reserved) field of a PDU header of the MAC PDU may be set as an indication field, and when the length is 1 bit and the value is 0, it indicates that the transparent transmission identifier value is invalid; when the value is 1, the transparent transmission identification value is effective.

The MAC layer may transmit data to the air interface Uu through a physical layer (PHY). In practical application, the MAC uses a CA control scheme, including using one or more PDCCHs to indicate a plurality of PDSCHs, respectively, and transmits a data packet to the UE.

An embodiment of the present invention further provides a method for processing time information transmission, which is applied to a second communication device, and as shown in fig. 2, the method includes:

step 201, receiving an MAC PDU carrying time information;

step 202, determining that the transparent transmission identifier carried by the MAC PDU is valid, and under the indication of the identifier, bearing the time information through SRB; or, determining that the transparent transmission identifier carried by the MAC PDU is invalid, and carrying the time information through the SRB in the transparent transmission mode.

Here, after receiving the MAC PDU carrying the time information sent by the first communication device via the SRB from each carrier of the CA, the MAC layer on the second communication device side decompresses the MAC PDU. And determining that the value of the transparent transmission identifier carried by the indication domain in the data packet is valid, namely 1, and under the indication of the identifier, bearing the time information through the SRB. And if the transparent transmission identification value carried by the indication domain in the MAC PDU is invalid, namely 0, carrying the time information through the SRB in the transparent transmission mode.

In an embodiment, the carrying, under the indication of the identifier, the time information by the SRB includes:

the RRC layer transfers the time information to the NAS.

In practical application, the MAC layer directly transmits the time frame control information data packet to the RLC layer through the fourth identifier, the RLC layer determines that the fourth identifier is valid, the time frame control information data packet is directly transmitted to the PDCP layer through the fifth associated identifier, the PDCP layer determines that the fifth identifier is valid, and the time frame control information data packet is directly transmitted to the RRC layer through the sixth identifier. Therefore, data transmission is flattened, transmission efficiency is improved, and delay is reduced. It should be noted that the fourth identifier, the fifth identifier, and the sixth identifier may use the same associated identifier, so as to simplify the processing procedure of the associated. Here, the identification is valid, which means that the identification indicates that the transmitted data packet is a data packet with time information, otherwise, the identification is invalid.

In an embodiment, the SRB in transparent transmission mode carries the time information, including:

the RRC layer transfers the time information to the NAS.

Here, the MAC layer directly transfers the time frame control information packet to the RLC layer, the RLC layer directly transfers the time frame control information packet to the PDCP layer, and the PDCP layer directly transfers the time frame control information packet to the RRC layer through the SRB in the pass-through mode.

To use SRB in pass-through mode, in an embodiment, the method further comprises:

and setting configuration parameters in the process of establishing RRC connection or RRC reconfiguration, and generating the SRB in the transparent transmission mode. The configuration parameters include: and the third configuration parameter corresponding to the PDCP layer and/or the fourth configuration parameter corresponding to the RLC layer.

Here, the third configuration parameter is used to set a pass-through mode at the time of PDCP layer setup, and the fourth configuration parameter is used to increase processing of the DCCH in the pass-through mode of the RLC layer, so that the RLC layer can "transparently" transfer data delivered by the DCCH to the PDCP layer.

The present invention will be described in further detail with reference to the following application examples.

As shown in fig. 3, in the embodiment of the present application, the base station employs a 5G base station (gNB), the base station is connected to a Core Network (CN), and the base station is connected to a User Equipment (UE). The gNB and the CN form a network side.

The data processing flow of the network side is as follows:

1. as shown in fig. 3, Step1 is the interaction between NAS and RRC. The NAS sends a time frame control information data packet to the RRC in the form of NAS PDU, and gives an associated clear indication that the data packet is the time frame control information data packet.

2. And after receiving the NAS PDU, the RRC judges the data packet type indication. If the time frame control information data packet is not the time frame control information data packet, processing according to the existing processing mode; if the data packet is the time frame control information data packet, then:

2.1, the RRC SDU (namely NAS PDU) is directly sent to the lower layer through the SRB in the mode of RRC PDU without adding any content and modifying any content. The RRC does not carry out ASN.1 coding and does not add the attached control information of the RRC.

2.2, if the lower layer is PDCP, carrying the transparent transmission identification along the path, and taking the value as an effective value. When the transparent transmission identifier is a valid value, the PDCP receives the RRC PDU carrying the identifier, namely the PDCP SDU, does not add any content, does not perform operations such as encryption, header compression, integrity inclusion and the like, directly sends the identifier to the RLC in a PDCP PDU mode, and also sends the transparent transmission identifier to the RLC.

Instead of using the Transparent transmission identifier of the associated path, a TM Mode (Transparent Mode) may be introduced into the PDCP layer, where the function of the PDCP layer in the TM Mode is defined as: and any PDCP SDU of the RB loaded in the mode is directly sent to the RLC in a PDCP PDU mode without adding any content, carrying out operations such as encryption, header compression, integrity protection and the like. When the PDCP protocol entity of the SRB is established, the TM mode is directly established. When the RRC transmits data using the SRB, the control packet is directly transmitted to the PDCP.

No matter the PDCP transparent transmission processing under the indication of the transparent transmission identification or the PDCP transparent transmission under the TM mode control of RRC signaling configuration, the PDCP does not distribute SN numbers to the control data packet, does not start a sending window, and does not set a buffer function to the data packet.

3. The RLC layer still uses the TM mode. The handling of DCCH logical channel types is added in RLC TM mode.

The TM of the RLC adds processing to a DCCH (Dedicated Control logical Channel) Channel, and when the PDCP sends data to the RLC, the RLC TM mode of the SRB is directly used for sending the data. If the transparent transmission identifier sent by the PDCP is received while the RLC SDU is received, the RLC also sends the transparent transmission identifier to the MAC.

4. And processing the MAC layer.

There are two ways for the MAC layer to receive data: a) receiving an RLC PDU from an RLC; b) data packets received directly from the RRC.

For the mode a), the above steps 1, 2 and 3 are performed sequentially, and after the data packet is processed by the RLC, the MAC is transmitted.

For the mode b), because the PDCP/RLC protocol layers are in TM mode, the contents of the RRC PDU are unchanged after PDCP/RLC. To save transmission time, the RRC may send the control packet directly to the MAC along with its corresponding SRB ID.

And (3) scheduling of MAC: the MAC schedules the data packet on the first available air interface frequency domain resource and time domain resource according to a QoS (Quality of Service) parameter of the SRB, such as GBR, Latency, or an identifier of the SRB that needs high priority scheduling configured in other manners, such as an indication that the scheduling priority needs to be increased is directly sent to the MAC through RRC.

In order to reduce the delay, the MAC transmits the data packet by multiplexing (multiplexing) transmission, and transmits the data packet to the air interface on a plurality of carriers simultaneously by using CA (Carrier Aggregation). The number of transmissions of the HARQ process transmitting the data is set to 1 or some other value on each carrier, i.e. no retransmissions are made to reduce latency and jitter.

If the transparent transmission mode of the PDCP and RLC is transmitted to the MAC through a channel associated method carried when transmitting data, the indication information of the transparent transmission mode needs to be transmitted to the receiving end in order for the receiving end to correctly analyze the data packet. And carrying the identifier in a PDU header of the MAC PDU corresponding to the data packet. The mark length is at least one bit, 0 marks an invalid value, and 1 marks a transparent transmission mode.

The data processing flow of the UE side is as follows:

1. the MAC layer receives the packet from each carrier of the CA.

2. If only one of the packets is successfully received, the packet is parsed and transmitted to the upper layer.

2.1 if the value of the indication field in the data packet is a valid value, that is, 1, after the analysis, the MAC layer sends the data packet to the RRC (for example, the data packet may be sent to the RRC via the associated identifier), and the RRC processes the data packet and sends the data packet to the NAS layer.

2.2 if the indication field value in the data packet is invalid value, namely 0, after analysis, the MAC layer sends the data packet to the RLC.

And the RLC receives the RLC PDU and processes the data packet according to the transparent transmission mode configured by the SRB. And if the channel is a DCCH channel in a transparent transmission mode, directly sending the data packet to the PDCP.

After receiving the data packet, the PDCP processes the data packet according to the SRB configured mode, and then sends the data packet to the RRC.

The RRC receives the packet and sends the packet to the NAS layer.

In order to implement the method according to the embodiment of the present invention, an embodiment of the present invention further provides a processing apparatus for transmitting time information, where the processing apparatus is disposed in a first communication device, and as shown in fig. 4, the apparatus includes: a first receiving module 401 and a sending module 402; wherein the content of the first and second substances,

a first receiving module 401, configured to receive a NAS PDU;

a sending module 402, configured to determine that the NAS PDU includes time information, and send the time information to the second communication device through the SRB in the transparent transmission mode, or send the time information to the second communication device on the SRB according to an instruction.

In an embodiment, the sending module 402 sends the time information to the second communication device through the SRB in the transparent transmission mode, including:

and the MAC layer puts the time information into a corresponding MAC PDU and sends the MAC PDU.

In one embodiment, the apparatus further comprises:

a first configuration module 403, configured to set configuration parameters in a process of establishing an RRC connection or in a process of RRC reconfiguration, and generate an SRB in the transparent transmission mode; the configuration parameters include: the first configuration parameters corresponding to the PDCP layer and/or the second configuration parameters corresponding to the RLC layer.

In an embodiment, the sending module 402 sends the time information to the second communication device on the SRB according to the indication, including:

the RRC layer passes the NAS PDU and the first identity to one of: a PDCP layer or an RLC layer or a MAC layer;

In an embodiment, the sending module 402 is further configured to:

In actual application, the first receiving module 401, the sending module 402 and the first configuration module 403 may be implemented by a processor in a processing device for transmitting time information. Of course, the processor needs to run a computer program in memory to implement its functions.

In order to implement the method according to the embodiment of the present invention, an embodiment of the present invention further provides a processing apparatus for transmitting time information, where the processing apparatus is configured in a second communication device, and as shown in fig. 5, the apparatus includes: a second receiving module 501, a first transmitting module 502 and a second transmitting module 503.

A second receiving module 501, configured to receive a MAC PDU carrying time information;

a first transmission module 502, configured to determine that a transparent transmission identifier carried in the MAC PDU is valid, and under an indication of the transparent transmission identifier, bear the time information through an SRB;

a second transmission module 503, configured to determine that the transparent transmission identifier carried in the MAC PDU is invalid, and carry the time information through an SRB in a transparent transmission mode.

In one embodiment, the first transfer module 502 is further configured to:

the RRC layer transfers the time information to the NAS.

In an embodiment, the second transferring module 503 is further configured to:

the RRC layer transfers the time information to the NAS.

In one embodiment, the apparatus further comprises:

a second configuration module 504, configured to set configuration parameters in a process of establishing an RRC connection or a process of RRC reconfiguration, and generate an SRB in the transparent transmission mode; the configuration parameters include: a third configuration parameter corresponding to the PDCP layer and/or a fourth configuration parameter corresponding to the RLC layer.

In practical applications, the second receiving module 501, the first transmitting module 502, the second transmitting module 503, and the second configuring module 504 may be implemented by a processor in a processing device for transmitting time information. Of course, the processor needs to run a computer program in memory to implement its functions.

It should be noted that: in the processing apparatus for transmitting time information according to the above embodiment, when time information is transmitted, only the division of the program modules is illustrated, and in practical applications, the processing may be distributed and completed by different program modules according to needs, that is, the internal structure of the apparatus may be divided into different program modules to complete all or part of the processing described above. In addition, the processing apparatus for time information transmission and the processing method for time information transmission provided by the above embodiments belong to the same concept, and specific implementation processes thereof are detailed in the method embodiments and are not described herein again.

Based on the hardware implementation of the program module, and in order to implement the method according to the embodiment of the present invention, the embodiment of the present invention further provides a first communication device. Fig. 6 shows only an exemplary structure of the first communication device, not the entire structure, and a part of or the entire structure shown in fig. 6 may be implemented as necessary.

As shown in fig. 6, a first communication device 600 provided in an embodiment of the present invention includes: at least one processor 601, memory 602, and at least one network interface 603. The various components in the base station 600 are coupled together by a bus system 604. It will be appreciated that the bus system 604 is used to enable communications among the components. The bus system 604 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 604 in fig. 6.

The memory 602 in embodiments of the present invention is used to store various types of data to support the operation of the base station. Examples of such data include: any computer program for operation on a base station.

The processing method for transmitting the time information disclosed by the embodiment of the invention can be applied to the processor 601, or can be realized by the processor 601. The processor 601 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the processing method for time information transmission may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 601. The Processor 601 may be a general purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. Processor 601 may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed by the embodiment of the invention can be directly implemented by a hardware decoding processor, or can be implemented by combining hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the memory 602, and the processor 601 reads the information in the memory 602, and completes the steps of the processing method for transmitting the time information provided by the embodiment of the present invention in combination with the hardware thereof.

In an exemplary embodiment, the first communication Device may be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable Logic Devices (PLDs), Complex Programmable Logic Devices (CPLDs), FPGAs, general purpose processors, controllers, Micro Controllers (MCUs), microprocessors (microprocessors), or other electronic components for performing the aforementioned methods.

Based on the hardware implementation of the program module, and in order to implement the method according to the embodiment of the present invention, the embodiment of the present invention further provides a second communication device. Fig. 7 shows only an exemplary structure of the second communication apparatus, not a whole structure, and a part of or the whole structure shown in fig. 7 may be implemented as necessary.

As shown in fig. 7, a second communication device 700 provided in an embodiment of the present invention includes: at least one processor 701, memory 702, and at least one network interface 703. The various components in user device 700 are coupled together by a bus system 704. It will be appreciated that the bus system 704 is used to enable communications among the components. The bus system 704 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled in fig. 7 as the bus system 704.

The memory 702 in embodiments of the present invention is used to store various types of data to support the operation of the user equipment. Examples of such data include: any computer program for operating on a user device.

The processing method for transmitting the time information disclosed by the embodiment of the invention can be applied to the processor 701, or can be implemented by the processor 701. The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the processing method for time information transmission may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 701. The Processor 701 may be a general purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The processor 701 may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed by the embodiment of the invention can be directly implemented by a hardware decoding processor, or can be implemented by combining hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the memory 702, and the processor 701 reads the information in the memory 702, and completes the steps of the process of time information transmission provided by the embodiment of the present invention in combination with its hardware.

In an exemplary embodiment, the second communication device 700 may be implemented by one or more ASICs, DSPs, PLDs, CPLDs, FPGAs, general-purpose processors, controllers, MCUs, microprocessors, or other electronic components for performing the aforementioned methods.

It will be appreciated that the

memories

602, 702 can be either volatile memory or nonvolatile memory, and can include both volatile and nonvolatile memory. Among them, the nonvolatile Memory may be a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a magnetic random access Memory (FRAM), a Flash Memory (Flash Memory), a magnetic surface Memory, an optical disk, or a Compact Disc Read-Only Memory (CD-ROM); the magnetic surface storage may be disk storage or tape storage. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced DRAM), Synchronous Dynamic Random Access Memory (SLDRAM), Direct Memory (DRmb Access), and Random Access Memory (DRAM). The described memory for embodiments of the present invention is intended to comprise, without being limited to, these and any other suitable types of memory.

In an exemplary embodiment, the embodiment of the present invention further provides a storage medium, that is, a computer storage medium, which may specifically be a computer readable storage medium, for example, including

memories

602 and 702 storing computer programs, where the computer programs are executable by the processor 601 of the first communication device and the processor 701 of the second communication device to complete the steps described in the method of the embodiment of the present invention. The computer readable storage medium may be a ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface Memory, optical disk, or CD-ROM, among others.

It should be noted that: "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In addition, the technical solutions described in the embodiments of the present invention may be arbitrarily combined without conflict.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A processing method for time information transmission is applied to a first communication device, and the method comprises the following steps:

receiving a non-access stratum (NAS) Protocol Data Unit (PDU);

and determining that the NAS PDU contains time information, and transmitting the time information to the second communication equipment through a Signaling Radio Bearer (SRB) in a transparent transmission mode, or transmitting the time information to the second communication equipment on the SRB according to an instruction.

2. The method of claim 1, wherein the transmitting the time information to the second communication device via the SRB in transparent transmission mode comprises:

the radio resource control RRC layer transmits the time information to a media access control MAC layer through the SRB in a transparent transmission mode;

3. The method of claim 1, further comprising:

setting configuration parameters in the process of establishing RRC connection or RRC reconfiguration, and generating the SRB in the transparent transmission mode; the configuration parameters include: and the first configuration parameter corresponding to the PDCP layer and/or the second configuration parameter corresponding to the RLC layer is controlled by the radio link.

4. The method of claim 1, wherein said transmitting the time information to the second communication device on the SRB in accordance with the indication comprises:

5. The method according to claim 2 or 4,

6. A processing method for time information transmission is applied to a second communication device, and the method comprises the following steps:

receiving MAC PDU carrying time information;

7. The method of claim 6, wherein the carrying the time information via the SRB under the indication of the identifier comprises:

the RRC layer transfers the time information to the NAS.

8. The method of claim 6, wherein the SRB in transparent transmission mode carries the time information, and wherein the SRB comprises:

the RRC layer transfers the time information to the NAS.

9. The method of claim 6, further comprising:

10. A processing apparatus for time information transmission, applied to a first communication device, the apparatus comprising:

a first receiving module, configured to receive a NAS PDU;

11. A processing apparatus for time information transmission, applied to a second communication device, the apparatus comprising:

12. A first communications device, comprising: a processor and a memory for storing a computer program capable of running on the processor, wherein,

the processor, when executing the computer program, is adapted to perform the steps of the method of any of claims 1 to 5.

13. A second communications device, comprising: a processor and a memory for storing a computer program capable of running on the processor, wherein,

the processor, when executing the computer program, is adapted to perform the steps of the method of any of claims 6 to 9.

14. A storage medium having a computer program stored thereon, the computer program, when executed by a processor, implementing the steps of the method of any one of claims 1 to 5 or any one of claims 6 to 9.