CN113853815B - Communication method and device - Google Patents

Abstract

A communication method and device. In this method, the network device determines and sends the first timing information to the terminal device, the first timing information is used to indicate the first duration, and the first duration is the system that the terminal device requests to the network device twice before and after the dedicated signaling The minimum time interval between messages, so it is clear how long the terminal device can request to obtain the system message carried in the dedicated signaling again, so as to avoid overloading the network equipment.

Description

A communication method and device

technical field

The present application relates to the technical field of communication, and in particular to a communication method and device.

Background technique

Currently, a new radio (new radio, NR) communication technology defines a method for obtaining system information (system information, SI) on demand (on demand SI). The UE can request the network device to send the required system information to the UE through broadcast or dedicated signaling, so as to realize the flexible sending of the system information.

In the scenario of broadcasting the system message of the UE, the network device can send the broadcast message carrying the system message within the configured SI time window, and the UE can receive the system message through broadcast within the SI time window. However, for the scenario where the network device sends the system message through the dedicated signaling of the UE, it is currently unclear when the UE receives the system message. The device brings too much burden, so that the communication of the UE based on the system message is hindered.

To sum up, the current solution for the UE to receive the system message carried in the dedicated signaling needs to be optimized.

Contents of the invention

The present application provides a communication method and device to optimize the solution for a terminal to receive a system message sent by a network device through dedicated signaling.

In a first aspect, the present application provides a communication method. The method can be executed by a terminal device such as a mobile phone or a chip in the terminal device. The terminal device may receive first timing information from the network device, the first timing information is used to indicate a first duration, and the first duration is the minimum time interval between two request messages sent by the terminal device, each The request message is used to request to obtain the system message of the dedicated signaling carried by the terminal device.

Using the above method, the network device can configure the terminal device with the first duration, which is used to indicate the minimum time interval between the terminal device's two requests to the network device for system messages carried in dedicated signaling, so it is clear that the terminal The time interval at which the device can request to obtain the system information carried in the dedicated signaling again, so as to avoid overloading the network equipment.

In a possible example, the terminal device may further send a first message to the network device, where the first message is used to request to obtain a system message of dedicated signaling carried by the terminal device. The terminal device may trigger execution of the timing of the first duration when sending the first message, or, the terminal device may trigger execution of the first time duration when receiving a second message for responding to the first message. Timing of duration. After the first duration times out, if the terminal device does not receive the system message sent by the network equipment through the dedicated signaling of the terminal device, the terminal device may send a third message, and the first The third message is used to request to obtain the system message of the dedicated signaling carried by the terminal device.

With the above design, it can be ensured that the time interval between the first message and the third message sent by the terminal device to request to obtain the system message of the dedicated signaling carried by the terminal device is not less than the first duration, which can avoid network equipment Overburdened.

In a possible example, the terminal device may trigger a first timer to start counting the first duration when sending the first message, or the terminal device may triggering the second timer to restart the timing of the first duration. Wherein, the first timer may be the same as or different from the second timer.

In this example, the first message may be signaling specific to the terminal device. The specific signaling can be scrambled by the specific identification of the terminal device. In addition, the above first message may be carried on a signaling radio bearer.

In another example, the terminal device may trigger a third timer to start counting the first duration when receiving the second message, or, the terminal device may trigger the fourth timer to restart the timing of the first duration. It should be understood that the third timer may be the same as or different from the fourth timer. The third timer may be the same as or different from the above first timer and the second timer, and the fourth timer may be the same as or different from the above first timer and the second timer.

In this another example, the first message may be a first random access request message, the second message may be a first random access response message including only a random access preamble identifier, and the second message is The network device's response to the first message sent by the terminal device via Msg1. Specifically, the first random access request message may be the random access request message Msg1 in the four-step random access process. The second message may be a random access response (random access response, RAR) message including only a random access preamble identifier (RAPID).

Alternatively, the first message may be random access uplink data, and the second message may be a contention resolution message. Specifically, the first random access request message may be the random access uplink data Msg3 in the four-step random access process. The second message may be a contention resolution message Msg4 in the four-step random access process.

Alternatively, the first message may be a second random access request message, and the second message may be a second random access response message. Specifically, the first random access request message may be the random access request message MsgA in the two-step random access process. The second message may be a random access response message MsgB in the two-step random access process.

The above first message may include an identifier of the terminal device and/or a system message list. Wherein, the identifier of the terminal device may be a cell-radio network temporary identifier (cell-radio network temporary identifier, TC-RNTI) of the terminal device. The terminal device that initiates the system information acquisition request can be determined by the identifier of the terminal device. The system message list is used to indicate the system messages required by the terminal device. The system message list may include one or more system information blocks (system information block, SIB) or one or more system messages. Wherein, there is a correspondence between the system message block and the system message required by the terminal device 101 (or in other words, one or more system message blocks may be mapped as a system message).

If the terminal device receives a system message carried in the dedicated signaling of the terminal device from the network device, the terminal device may stop performing the timing of the first duration.

Exemplarily, when the time period for performing the timing of the first duration overlaps with the time period of the measurement interval configured by the network device, the terminal device may suspend execution of the Timing of the first duration.

In addition, the terminal device can also maintain a counter, and the terminal device can perform a count of the counter after sending a request message each time, the request message is used to request to obtain a system message carried in the dedicated signaling of the terminal device, the The request message may include the first message and/or the third message; the terminal device may send handover assistance information to the network device after the count value of the counter reaches a count threshold, and the handover assistance information A handover of the serving cell for the terminal device. The above auxiliary handover information may be an indication of failure to obtain system information or a timeout indication of obtaining system information. The handover assistance information may be used by the network device to judge whether to handover the serving cell of the terminal device.

With the above design, when the terminal device has not received the system message after sending and obtaining the system message acquisition request carried in the dedicated signaling multiple times, the terminal device in the connected state will consider the current serving cell to be unavailable, and thus report the handover Auxiliary information, so that the network equipment can switch the serving cell of the terminal device according to the handover auxiliary information, so as to improve the transmission quality of the terminal device.

The above counting threshold may be configured by the network device, or the counting threshold may be defined by a protocol or determined in a preconfigured manner.

Exemplarily, if the terminal device receives a system message carried by the terminal device's dedicated signaling from the network device, the terminal device can restore the count value of the counter to the initial value, and there is no need to report the handover assistance information.

In a second aspect, the embodiment of the present application provides a communication method. The method can be executed by a network device or a chip in the network device. Wherein, the network equipment may include access network equipment, such as a base station. The first timing information is determined by the network device, the first timing information is used to indicate the first duration, and the first duration is the minimum time interval between two request messages sent by the terminal device, each of the The request message is used to request to acquire the system message of the dedicated signaling carried by the terminal device. A network device may send the first timing information to the terminal device.

The above first timing information may be carried in a broadcast message or a dedicated signaling of the terminal device.

The network device may also receive handover assistance information from the terminal device, the handover assistance information is used for handover of the serving cell of the terminal device, and determine whether to switch the serving cell of the terminal device according to the handover assistance information .

In a third aspect, the embodiment of the present application provides a communication device. The communication device may be used to perform the steps performed by the terminal device in the above first aspect or any possible design of the first aspect. The communication device may realize each function or step or operation in each of the above methods in the form of a hardware structure, a software module, or a hardware structure plus a software module. For example, functional modules corresponding to the functions or steps or operations in the above methods may be set in the communication device to support the communication device to execute the above methods.

When the communication device shown in the third aspect is realized by a software module, the communication device may include a communication module and a processing module coupled to each other, wherein the communication module may be used to support the communication device to perform communication, and the processing module may be used for the communication device to perform processing operations, Such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.

The above communication module can be used to perform the sending and/or receiving action of the terminal device in the first aspect and/or any possible design of the first aspect, such as performing the action of the terminal device sending information, messages or signaling to the network equipment, Or for performing an action of receiving information, messages or signaling from a network device. And/or, the processing module can be used to execute the processing actions of the terminal device in any possible design of the first aspect and/or the first aspect, such as controlling the communication module to receive and or send information, messages or signaling, and information operations such as storage.

Exemplarily, the communication module may be configured to receive first timing information from a network device, the first timing information is used to indicate a first duration, and the first duration is the minimum time between two request messages sent by the terminal device. Time interval, each request message is used to request to obtain a system message of dedicated signaling carried by the terminal device.

In a possible example, the communication module is further configured to send a first message to the network device, where the first message is used to request to obtain a system message of dedicated signaling carried by the terminal device. The processing module may trigger execution of the timing of the first duration when sending the first message, or the processing module may trigger execution of the timing of the first duration when receiving a second message for responding to the first message. Timing of the first duration. After the first duration times out, if the terminal device does not receive the system message sent by the network device through the dedicated signaling of the terminal device, the communication module may send a third message, and the first The third message is used to request to obtain the system message of the dedicated signaling carried by the terminal device.

Specifically, the processing module may trigger a first timer to start timing the first duration when sending the first message, or the processing module may trigger a second timer when sending the first message Timing of said first duration is restarted. Wherein, the first timer may be the same as or different from the second timer.

The above first message may be dedicated signaling of the terminal device. The specific signaling can be scrambled by the specific identification of the terminal device. The above first message may be carried on a signaling radio bearer.

In another example, the processing module may trigger a third timer to start counting the first duration when the terminal device receives the second message through the communication module, or, the processing module A fourth timer may be triggered to restart timing of the first duration when the terminal device receives the second message through the communication module. It should be understood that the third timer may be the same as or different from the fourth timer. The third timer may be the same as or different from the above first timer and the second timer, and the fourth timer may be the same as or different from the above first timer and the second timer.

In this example, the first message may be a first random access request message, the second message may be a first random access response message including only a random access preamble identifier, and the second message is for the network device to The terminal device responds with the first message sent by Msg1. Specifically, the first random access request message may be the random access request message Msg1 in the four-step random access process. The second message may be a random access response (random access response, RAR) message including only a random access preamble identifier (RAP ID).

Alternatively, the first message may be random access uplink data, and the second message may be a contention resolution message. Specifically, the first random access request message may be the random access uplink data Msg3 in the four-step random access process. The second message may be a contention resolution message Msg4 in the four-step random access process.

Alternatively, the first message may be a second random access request message, and the second message may be a second random access response message. Specifically, the first random access request message may be the random access request message MsgA in the two-step random access process. The second message may be a random access response message MsgB in the two-step random access process.

The above first message may include an identifier of the terminal device and/or a system message list. Wherein, the identifier of the terminal device may be a cell-radio network temporary identifier (cell-radio network temporary identifier, TC-RNTI) of the terminal device. The terminal device that initiates the system information acquisition request can be determined by the identifier of the terminal device. The system message list is used to indicate the system messages required by the terminal device. The system message list may include one or more system information blocks (system information block, SIB) or one or more system messages. Wherein, there is a correspondence between the system message block and the system message required by the terminal device 101 (or in other words, one or more system message blocks may be mapped as a system message).

If the terminal device receives a system message of dedicated signaling carried by the terminal device from the network device through the communication module, the processing module may stop timing the first duration.

Exemplarily, when the time period for performing the timing of the first duration overlaps with the time period of the measurement interval configured by the network device, the processing module may suspend execution during the overlapping time period Timing of the first duration.

The processing module may maintain a counter, and after sending the request message each time, the processing module may perform a count of the counter, and the request message is used to request to obtain the system message of the dedicated signaling carried by the terminal device, so The request message includes the first message and/or the third message; the processing module may trigger the communication module to send handover assistance information to the network device after the count value of the counter reaches a count threshold The network equipment can switch the serving cell of the terminal device according to the handover assistance information. The above auxiliary handover information may be an indication of failure to obtain system information or a timeout indication of obtaining system information. The handover assistance information may be used by the network device to judge whether to handover the serving cell of the terminal device.

The above counting threshold may be configured by the network device, or the counting threshold may be defined by a protocol or determined in a preconfigured manner.

Exemplarily, if the terminal device receives a system message of dedicated signaling carried by the terminal device from the network device through the communication module, the processing module may restore the count value of the counter to an initial value, which means There is no need to report handover auxiliary information.

When the communication device shown in the third aspect is implemented by hardware components, the communication device may include a processor configured to execute the steps performed by the terminal device in the first aspect and/or any possible design of the first aspect. The communication device may also include memory. Wherein, the memory may be used to store instructions, and the processor may be used to call and execute the instructions from the memory, so as to execute the steps performed by the terminal device in the first aspect and/or any possible design of the first aspect. The communication device may also include a transceiver for the communication device to communicate.

Exemplarily, the transceiver can be used to perform the actions of sending and/or receiving by the terminal device in the first aspect and/or any possible design of the first aspect, such as performing the sending and/or receiving action of the terminal device to the network device Action, or an action for performing an action for receiving information, messages, or signaling from a network device. And/or, the processor can be used to execute the processing actions of the terminal device in any possible design of the first aspect and/or the first aspect, such as controlling the transceiver to receive and/or send information, messages or signaling, and to control The memory stores information and the like. Specifically, the transceiver may be used to perform the steps performed by the communication module described in the above third aspect. The processor may be configured to perform the steps performed by the processing module described in the third aspect above.

In a fourth aspect, the embodiment of the present application provides a communication device. The communication device may be used to execute the steps executed by the network device in the above second aspect or any possible design of the second aspect. The communication device may realize each function or step or operation in each of the above methods in the form of a hardware structure, a software module, or a hardware structure plus a software module. For example, functional modules corresponding to the functions or steps or operations in the above methods may be set in the communication device to support the communication device to execute the above methods.

When the communication device shown in the fourth aspect is realized by a software module, the communication device may include a communication module and a processing module coupled to each other, wherein the communication module may be used to support the communication device to perform communication, and the processing module may be used for the communication device to perform processing operations, Such as generating information/messages that need to be sent, or processing received signals to obtain information/messages.

The above communication module can be used to perform actions sent and/or received by the network equipment in the second aspect and/or any possible design of the second aspect, such as an action for the network equipment to send information, messages or signaling to the terminal device, or An action for performing the reception of information, messages or signaling from a terminal device. And/or, the processing module can be used to execute the processing action of the network device in any possible design of the second aspect and/or the second aspect, such as being used to control the communication module to receive and or send information, messages or signaling, and to execute storage of information, etc.

Exemplarily, the processing module may be configured to determine first timing information, where the first timing information is used to indicate a first duration, and the first duration is a minimum time interval between two request messages sent by the terminal device, Each of the request messages is used to request to obtain a system message of dedicated signaling carried by the terminal device. The communication module is operable to send the first timing information to the terminal device.

The above first timing information is carried in a broadcast message or a dedicated signaling of the terminal device.

The communication module can also be used to receive handover assistance information from the terminal device, the handover assistance information is used for handover of the serving cell of the terminal device, and the processing module can be used to determine whether to switch the terminal device according to the handover assistance information Serve the community.

When the communication device shown in the fourth aspect is implemented by hardware components, the communication device may include a processor configured to execute the steps performed by the network device in the second aspect and/or any possible design of the second aspect. The communications device may also include memory. Wherein, the memory may be used to store instructions, and the processor may be used to call and execute the instructions from the memory, so as to execute the steps performed by the network device in the second aspect and/or any possible design of the second aspect. The communication device may also include a transceiver for the communication device to communicate.

Exemplarily, the transceiver can be used to perform the sending and/or receiving action of the network device in the second aspect and/or any possible design of the second aspect, such as sending information, messages or signaling from the network device to the terminal device or for performing an action for receiving information, messages or signaling from a terminal device. And/or, the processor can be used to execute the processing action of the network device in any possible design of the second aspect and/or the second aspect, such as being used to control the transceiver to receive and or send information, messages or signaling, and to control The memory stores information and the like. Specifically, the transceiver can be used to perform the steps performed by the communication module described in the fourth aspect above. The processor may be configured to execute the steps performed by the processing module described in the fourth aspect above.

In a fifth aspect, the present application provides a communication system, which may include the communication device shown in the third aspect and the communication device shown in the fourth aspect. Wherein, the communication device shown in the third aspect may be composed of software modules and/or hardware components. The communication device shown in the fourth aspect may be composed of software modules and/or hardware components.

Taking the communication device shown in the third aspect as a terminal device and the communication device shown in the fourth aspect as a network device as an example, the network device can determine first timing information, and the first timing information is used to indicate the first duration, The first duration is the minimum time interval between two request messages sent by the terminal device, and each request message is used to request to obtain a system message of dedicated signaling carried by the terminal device. A network device may send the first timing information to the terminal device. The terminal device can receive the first timing information.

In a sixth aspect, the present application provides a computer storage medium, in which instructions (or programs) are stored, and when they are invoked and executed on a computer, the computer executes the above-mentioned first aspect or the first aspect. Any possible design, or the method described in the second aspect or any possible design of the second aspect.

In a seventh aspect, the present application provides a computer program product, the computer program product may contain instructions, and when the computer program product is run on a computer, the computer is made to execute any possible design of the above first aspect or the first aspect , or the method described in the second aspect or any possible design of the second aspect.

In an eighth aspect, the present application provides a chip and/or a chip system including the chip, and the chip may include a processor. The chip may also include a memory (or a storage module) and/or a transceiver (or a communication module). The chip can be used to execute the method described in the first aspect or any possible design of the first aspect, or the second aspect or any possible design of the second aspect. The system-on-a-chip may consist of the above-mentioned chips, or may include the above-mentioned chips and other discrete devices, such as memory (or storage module) and/or transceiver (or communication module).

For the beneficial effects of the above-mentioned second to eighth aspects and possible designs thereof, reference may be made to the description of the beneficial effects of the method in the first aspect and possible designs of the first aspect.

Description of drawings

FIG. 1 is a schematic structural diagram of a wireless communication system provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of another wireless communication system provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of a four-step random access process provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of a two-step random access process provided by an embodiment of the present application;

FIG. 5 is a schematic flowchart of a communication method provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of timing of a first duration provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of another execution timing of the first duration provided by the embodiment of the present application;

FIG. 8 is a schematic flowchart of another communication method provided by the embodiment of the present application;

FIG. 9 is a schematic flowchart of another communication method provided by the embodiment of the present application;

FIG. 10 is a schematic flowchart of another communication method provided by the embodiment of the present application;

FIG. 11 is a schematic flowchart of another communication method provided by the embodiment of the present application;

FIG. 12 is a schematic flowchart of another communication method provided by the embodiment of the present application;

FIG. 13 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 14 is a schematic structural diagram of another communication device provided by an embodiment of the present application;

FIG. 15 is a schematic structural diagram of another communication device provided by an embodiment of the present application;

FIG. 16 is a schematic structural diagram of another communication device provided by an embodiment of the present application;

FIG. 17 is a schematic structural diagram of another communication device provided by an embodiment of the present application;

FIG. 18 is a schematic structural diagram of another communication device provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solution and advantages of the application clearer, the application will be further described in detail below in conjunction with the accompanying drawings. The specific operation methods in the method embodiments can also be applied to the device embodiments or system embodiments.

As shown in FIG. 1 , the communication method provided by the embodiment of the present application may be applied to a wireless communication system 100 , and the wireless communication system may include a terminal device 101 and a network device 102 .

It should be understood that the above wireless communication system 100 is applicable to both low frequency scenarios (sub 6G) and high frequency scenarios (above 6G). Application scenarios of the wireless communication system 100 include but are not limited to long term evolution (long termevolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), general mobile communication system (universal mobile telecommunications system, UMTS), global interconnection microwave access (worldwide interoperability for microwave access, WiMAX) communication system, cloud radio access network (cloud radio access network, CRAN) system, future fifth-generation system, new wireless (new radio, NR) communication system or a future evolved public land mobile network (public land mobile network, PLMN) system, etc.

The terminal apparatus 101 shown above may be user equipment (user equipment, UE), terminal (terminal), access terminal, terminal unit, terminal station, mobile station (mobile station, MS), remote station, remote terminal, mobile terminal ( mobile terminal), wireless communication equipment, terminal agent or terminal equipment, etc. The terminal device 101 may have a wireless transceiver function, which can communicate with one or more network devices of one or more communication systems (such as wireless communication), and accept network services provided by the network devices, where the network devices include but not The illustration is limited to network device 102 .

Wherein, the terminal device 101 may be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, wLL) station, a personal digital assistant (PDA) device, a Handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in future 5G networks or terminal devices in future evolved PLMN networks, etc.

In addition, the terminal device 101 can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; the terminal device 101 can also be deployed on water (such as ships, etc.); superior). The terminal device 101 may specifically be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal, an augmented reality (augmented reality, AR) terminal, an industrial control ( Wireless terminals in industrial control, wireless terminals in selfdriving, wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety Terminals, wireless terminals in a smart city, wireless terminals in a smart home, etc. The terminal device 101 may also be a communication chip with a communication module, or a vehicle with a communication function, or a vehicle-mounted device (such as a vehicle-mounted communication device, a vehicle-mounted communication chip) and the like.

The network device 102 may be an access network device (or called an access network site). Wherein, the access network device refers to a device that provides a network access function, such as a radio access network (radio access network, RAN) base station and the like. The network device 102 may specifically include a base station (base station, BS), or include a base station and a radio resource management device for controlling the base station, and the like. The network device 102 may also include a relay station (relay device), an access point, a base station in a future 5G network, a base station in a future evolved PLMN network or an NR base station, and the like. The network device 102 may be a wearable device or a vehicle-mounted device. The network device 102 may also be a communication chip with a communication module.

For example, the network device 102 includes but is not limited to: a next-generation base station (g nodeB, gNB) in 5G, an evolved node B (evolved node B, eNB) in an LTE system, and a radio network controller (radio network controller, RNC) , wireless controller under the CRAN system, base station controller (base station controller, BSC), home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (baseBand unit, BBU), transmission point (transmitting and receiving point (TRP), transmitting point (transmitting point, TP) or mobile switching center, etc. The network device 102 may also include a base station in a future 6G or newer mobile communication system.

The following uses the 5G network architecture shown in FIG. 2 as an example to describe a wireless communication system to which this embodiment of the present application can be applied.

The wireless communication system shown in FIG. 2 may include a 5G core network 201, and the wireless communication system may also include a 5G access network 202, wherein the 5G core network 201 and the 5G access network 202 may interact through an interface. In this wireless communication system scenario, the functional entity for implementing the method involved in the embodiment of the present application may be a network element and/or a terminal device in the 5G core network 201 . Specifically, the terminal device 101 shown in FIG. 1 above may include a terminal device connected to a base station in the 5G access network 202, for example, the UE 203 shown in FIG. 2 . The UE 203 is connected to an access network device 204 through a wireless link, and the access network device 204 may be a 5G base station in the 5G access network 202 . The terminal device 101 shown in FIG. 1 may include a UE connected to a relay station, such as the UE 205 shown in FIG. 2 . Wherein, the UE 205 is connected to the relay station 206, and the relay station 206 is connected to the access network device 204 through a relay link. The network device 102 shown in FIG. 1 above may include the access network device 204 in the 5G access network 202 as shown in FIG. 2 , or it may be a relay station connected to the access network device 204 as shown in FIG. 2 206 and so on.

In the following, four-step random access (4-step random access channel, RACH) and two-step random access (2-step RACH) procedures will be introduced in combination with the system shown in FIG. In the first random access procedure, request the network device 102 for the system message carried in the dedicated signaling.

As shown in Figure 3, the four-step random access process may include the following steps:

S11: The terminal device sends a Msg1 (subsequently referred to as a first random access request message) to the network device.

Among them, Msg1 is a random access request, including a random access preamble (preamble) code (or called preamble, preamble preamble). The random access preamble may be randomly selected by the terminal device, and the terminal device sends a message to the network device on the RACH Send Msg1.

Accordingly, the network device receives Msg1 from the terminal device.

S12. The network device sends a Msg2 (hereinafter may be referred to as a first random access response message) to the terminal device.

Here, Msg2 is the random access response (random access response, RAR) information for the preamble, including reserved bits (reserved bits, usually represented by R), timing advance (timing advance, TA) command, uplink grant (uplink grant ) and a temporary cell-radio network temporary identifier (temporary cell-radio network temporary identifier, TC-RNTI), etc. Wherein, the uplink authorization is the indication information of the uplink resource location allocated by the network equipment for the terminal device, and the TC-RNTI is a temporary cell wireless network temporary identifier allocated by the network equipment for the terminal device.

Accordingly, the terminal device receives Msg2 from the network device. The terminal device may use the RA-RNTI on the PDCCH to listen to the DCI scheduling the PDSCH carrying Msg2.

S13, the terminal device sends Msg3 (hereinafter may be referred to as random access uplink data) to the network device.

Wherein, Msg3 is uplink data or uplink payload (UL payload), and Msg3 is carried on a physical layer uplink shared channel (PUSCH). For convenience of description, the Msg3 involved in S13 may be called uplink data. Here, the terminal device immediately starts the contention resolution timer (contention resolution timer) after sending Msg3 (the timer must be restarted each time Msg3 is retransmitted), and the terminal device monitors the network device before the timer expires. Contention resolution message.

Exemplarily, the uplink data may include uplink packet data, such as data such as an identification of a terminal device.

Accordingly, the network device receives Msg3 from the terminal device.

S14, the network device sends a Msg4 (hereinafter referred to as a contention resolution message) to the terminal device.

Wherein, Msg4 is a contention resolution message (contention resolution message, CRM).

Here, when the network device sends the contention resolution message to the terminal device, when the terminal device is in the RRC idle (RRCidle) state or the RRC inactive (RRC inactive) state, the TC-RNTI can be used to scramble the DCI. Before the contention resolution timer expires, if the terminal monitors the DCI scrambled by the TC-RNTI, it will demodulate the response information carried on the PDSCH indicated by the DCI, and check the contention resolution identifier (contention resolution identifier) carried in the PDSCH. , CRID) and the common control channel serving data unit (common control channel serving data unit, CCCH SDU) carried by the Msg3 of the terminal device are matched, and if they are the same, the terminal device considers that the contention resolution is successful. Otherwise, the terminal device considers that the random access has failed.

Exemplarily, the terminal device may request the network device for the system message carried in the dedicated signaling through the four-step random access procedure shown in FIG. 3 above. Specifically, the terminal device 101 may carry the identification of the required system message in the above Msg1 and/or Msg3, and after the network device 102 receives the Msg1 and/or Msg3 carrying the identification of the required system message, the terminal device 101 may pass the The dedicated signaling sends the terminal device 101 required system messages.

As shown in FIG. 4 , it is a schematic flowchart of a two-step random access method. The two-step random access method includes the following steps:

S21, the terminal device sends a MsgA (hereinafter may be referred to as a second random access request message) to the network device.

Wherein, MsgA is a random access request, including a random access preamble and UL payload, which is equivalent to Msg1 and Msg3 in the 4-step RACH in FIG. 4 above.

S22. The network device sends a MsgB (hereinafter may be referred to as a second random access response message) to the terminal device.

Here, the MsgB is the response information to the MsgA, including at least one of the response information to the preamble and the response information to the PUSCH. The response information for the random access preamble is random access response information, including TA command, TC-RNTI and UL grant. The response information for the PUSCH includes contention resolution messages, such as CRID.

It should be noted that in the current two-step random access process, the network device may use a method when sending a contention resolution identifier to a terminal device in the RRC idle state or RRC inactive state: the network device uses a common RNTI to add DCI disturb. Based on this method, the terminal device needs to demodulate the PDSCH indicated by the received DCI, obtain the CRID carried in the response information carried by the PDSCH, and compare it with the UE identifier (identifier, ID) or UL CCCH SDU before confirming whether the contention is resolved success.

Exemplarily, the terminal device may request the network device for the system message carried in the dedicated signaling through the two-step random access procedure shown in FIG. 4 above. Specifically, the terminal device 101 may carry the identification of the required system message in the above MsgA, and after the network device 102 receives the MsgA carrying the identification of the required system message, it may send the message to the terminal device 101 through dedicated signaling of the terminal device 101 It requires system messages.

In addition, the terminal device 101 may also send a request message to the network device 102 through a dedicated signaling, and the request message may carry the identification of the system information required by the terminal device 101, so as to request the network device 102 to send a request message to the terminal device 101 through the dedicated signaling of the terminal device 101. The device 101 sends the system messages it needs.

Through the above method, the terminal device 101 can request the network device 102 for the system message carried in the dedicated signaling, since the time interval between the terminal device 101 requesting the network device for the system message carried in the dedicated signaling twice at present is not limited , multiple requests in a short period of time may bring an excessive burden to the network device 102 .

In order to optimize the scheme in which the network device 102 sends a system message to the terminal device 101 through dedicated signaling, this embodiment of the present application provides a communication method. As shown in Figure 5, the communication method may include the following steps:

S31: The network device 102 determines first timing information, where the first timing information is used to indicate a first duration. The first duration is the minimum time interval between two request messages sent by the terminal device 101 , and each request message is used to request to obtain a system message of dedicated signaling carried by the terminal device 101 .

In the process of requesting the system message of the dedicated signaling carried by the terminal device, the terminal device 101 can send a request message to the network device 102, and carry the identification of the terminal device 101 and/or the system requested by the terminal device 101 in the request message. list of messages. The system message list can be used to indicate system messages required by the terminal device 101 .

Specifically, the system message list may include one or more system information blocks (system information block, SIB) or one or more system messages. Wherein, there is a correspondence between the system message block and the system message required by the terminal device 101 (or in other words, one or more system message blocks may be mapped as a system message). For example, if the periods of SIB3/SIB4/SIB5 are the same, they can be mapped into one system message. It should be understood that the above system message list refers to one or more system messages, which may or may not be in the form of a list, but are only represented by multiple one or more system messages.

It should be understood that the request message in this application may include dedicated signaling sent by the terminal device 101, or include Msg1, Msg3 or MsgA sent by the terminal device 101 during the random access process.

S32: The network device 102 sends the first timing information to the terminal device 101.

S33: The terminal device 101 receives first timing information from the network device 102 .

Using the above method, the network device 102 can configure the first duration to the terminal device 101, and the first duration is used to indicate the time interval between the terminal device 101 requesting the network device 102 for the system message carried in the dedicated signaling twice, so it is clear How often can the terminal device 101 request to acquire the system message carried in the dedicated signaling again?

In this embodiment of the present application, the dedicated signaling of the terminal device 101 refers to signaling dedicated to the terminal device 101 , such as radio resource control (radio resource control, RRC) signaling dedicated to the terminal device 101 . Specifically, the dedicated signaling may be RRC reconfiguration (reconfiguration) signaling or an independent RRC message dedicated to sending system messages.

Exemplarily, the dedicated signaling may be scrambled with the dedicated identifier of the terminal device 101 to indicate that it is dedicated to the terminal device 101 . The dedicated identifier of the terminal device 101 may be a cell radio network temporary identifier (cell radio network temporary identifier, C-RNTI) of the terminal device 101 . Alternatively, the dedicated identifier of the terminal device 101 may be a network such as a configured scheduling RNTI (CS-RNTI) or a modulation and coding scheme RNTI (MCS-RNTI) as the terminal device. The identifier assigned by 101 that can uniquely identify the terminal device 101.

Exemplarily, the terminal device 101 may execute the timing of the first duration after sending the request message to the network device 102. After the timing expires, if the terminal device 101 does not receive from the network device 102 If the system message is received, the terminal device 101 can request the system message from the network device 102 again.

It should be understood that "executing the timing of the first duration" in this application may include starting the timer and making the timer execute the timing of the first duration, or including restarting (or re-executing) the timer and making the timer execute Timing of the first duration. Among them, restarting means that the timer that has been executing the timing of the first duration resets the timing duration to zero, and executes the timing of the first duration again. For example, the first duration is 60 milliseconds (ms), if the timer has executed 10ms timing, the terminal device 101 may trigger the timer to re-execute the timing of 60ms.

In a specific example, the terminal device 101 may send a first message to the network device 102, and the first message may be used to request a system message of dedicated signaling carried by the terminal device 101. The terminal device 101 may trigger timing of the first duration when sending the first message. After the first duration times out, if the terminal device 101 does not receive the system message sent by the network device 102 through the dedicated signaling of the terminal device 101, the terminal device 101 may send a third message to the network device 102, the first Three messages are used to request the system messages. Exemplarily, the first message and the third message may be the same system message as the request to acquire, for example, the first message and the third message carry a system message list of the system to indicate the same system message.

Wherein, the first message is, for example, a dedicated signaling sent by the terminal device 101 , and the dedicated signaling may be scrambled by using a dedicated identifier of the terminal device 101 . The dedicated signaling may be carried on a signaling radio bearer (signalling radio bearer, SRB), such as SRB1, SRB2 or SRB3. The third message may include dedicated signaling sent by the terminal device 101, or Msg1, Msg3 or MsgA sent by the terminal device 101 during the random access process. The above request message includes the first message and/or the third message.

In addition, the terminal device 101 may trigger timing of the first duration after the first offset duration after sending the first message. Wherein, the first offset duration may be configured by the network device 102 through broadcast or dedicated signaling of the terminal device 101, or may be determined by a protocol or in a preconfigured manner.

In another possible design, the terminal device 101 may trigger timing of the first duration when receiving the second message for responding to the first message. After the first duration times out, if the terminal device 101 does not receive the system message sent by the network device 102 through the dedicated signaling of the terminal device 101, the terminal device 101 may send a third message to the network device 102, the first Three messages are used to request the system messages. Exemplarily, the second message may carry a request response to indicate that the network device 102 has received the first message.

Wherein, the first message is, for example, Msg1, Msg3 or MsgA sent by the terminal device 101 during the random access process. Exemplarily, when the first message is Msg1, the second message may be a RAR message including (or only including) a random access preamble ID (RAP ID), and the RAR message is a system message carried by the network device 102 for Msg1 The response message sent by the request. When the first message is Msg3, the second message may be Msg4. When the first message is MsgA, the second message may be MsgB.

The above third message may include dedicated signaling sent by the terminal device 101, or Msg1, Msg3 or MsgA sent by the terminal device 101 during the random access process. The above request message includes the first message and/or the third message. Exemplarily, the first message and the third message may be the same system message as the request to acquire, for example, the first message and the third message carry a system message list of the system to indicate the same system message.

In addition, the terminal device 101 may trigger the timing of the first duration at a second offset duration after receiving the second message. Wherein, the second offset duration may be configured by the network device 102 through broadcast or dedicated signaling of the terminal device 101, or may be determined by a protocol or in a preconfigured manner. Specifically, the second message may be a RAR message including the RAP ID, Msg4 or MsgB, and for the above different second messages, the second offset duration may be the same or different.

The terminal device 101 may also trigger timing of the first duration when sending the third message above, or trigger timing of the first duration when receiving a fourth message in response to the third message above. After the first duration times out, if the terminal device 101 does not receive the system message sent by the network device 102 through the dedicated signaling of the terminal device 101, the terminal device 101 can send a request message to the network device 102 again (for example, called is the fifth message), the fifth message is used to request to obtain the system message. The setting method of the fifth message may refer to the third message. It should be understood that referring to the above description, after sending the fifth message, the terminal device 101 may send the request message again or multiple times until the maximum number of requests is reached or the system message is received. Wherein, the maximum number of requests may be sent by the network device through broadcast or configured through dedicated signaling, or may be defined by a protocol or determined through pre-configuration.

Specifically, when the third message is Msg1, the fourth message may be a RAR message including the RAP ID. When the third message is Msg3, the fourth message may be Msg4. When the third message is MsgA, the fourth message may be MsgB.

Exemplarily, in performing the timing of the first duration, if the terminal device 101 receives a system message carried in dedicated signaling from the network device 102, the terminal device 101 may stop timing of the first duration. Here, stopping the timing of the first duration may mean that the terminal device 101 controls the timer that executes the timing of the first duration to reset to zero, and controls the timer not to continue counting, or it means that the terminal device 101 controls the execution of the first duration. The timer that counts the duration does not continue to count. It should be understood that receiving the system message by the terminal device 101 may mean that the terminal device 101 receives and parses the dedicated signaling from the network device 102 to obtain the system message carried by the dedicated signaling.

Specifically, the system message carried by the dedicated signaling received by the terminal device 101 may be consistent with the system message required by the terminal device 101, or the system message carried by the dedicated signaling received by the terminal device 101 may include the system message required by the terminal device 101. information.

For example, as shown in FIG. 6 , taking the first message as a dedicated signaling sent by the terminal device 101 as an example, when the terminal device 101 sends the first message at time t0, the terminal device 101 starts timing the first duration. If the terminal device 101 receives the system message of the dedicated signaling carried by the terminal device 101 from the network device 102 at the time t1, the terminal device 101 may stop counting the first duration from the time t1. After the timeout of the first duration (timeout time is t2), if the terminal device 101 has not received the system message carried in the dedicated signaling, the terminal device 101 can send a third message at time t3 to request to obtain the system message again. system message, and the terminal device 101 executes the timing of the first duration again from time t3.

Optionally, when the number of request messages sent by the terminal device 101 for requesting the same system message reaches (or exceeds) a count threshold (such as 3, or other values), and the terminal device 101 does not receive If the system message is sent, the terminal device 101 can send handover assistance information to the network device 102, so that the network device 102 can switch the serving cell of the terminal device 101 according to the handover assistance information, so as to improve the transmission quality of the terminal device 101. It should be understood that the counting threshold may be configured by the network device 102 through broadcast or dedicated signaling, or may be defined by a protocol or determined in a pre-configured manner.

The above auxiliary handover information may be an indication of failure to obtain system information, an indication of timeout in obtaining system information, and the like. The handover assistance information can be carried in the measurement report. After receiving the handover assistance information, the network device 102 may determine whether to switch the serving cell of the terminal device 101 according to the handover assistance information.

In a possible example, the terminal device 101 may further maintain a counter (counter), and the counting result of the counter may represent the number of request messages sent by the terminal device 101 for requesting the same system message. The count value of the counter can start to accumulate from an initial value (such as 0). Exemplarily, after the terminal device 101 sends a request message for requesting the same system message each time, it controls the counter to count once. For example, after sending the above first message or third message, the terminal device 101 controls the counter to count once. When the counting result of the counter reaches (or exceeds) the above counting threshold, and the terminal device 101 has not received the system message sent by the network device 102 through dedicated signaling, the terminal device 101 can send handover assistance information to the network device 102 to The network device 102 can switch the serving cell of the terminal device 101 according to the handover assistance information.

In addition, when the terminal device 101 receives the system message carried in the dedicated signaling from the network device 102, the terminal device 101 can restore the count value of the counter to an initial value, such as 0.

Exemplarily, the network device 102 may configure a measurement gap to the terminal device 101, and the terminal device 101 will not send or receive any signaling or data during the measurement gap. When the timing period of the first duration performed by the terminal device 101 overlaps with the measurement interval configured by the network device, the terminal device 101 suspends timing of the first duration during the overlapped period of time. As shown in FIG. 7, if the time period of the first duration overlaps with the time period of the measurement interval, the terminal device 101 may control the timer used to perform the timing of the first duration to suspend timing at the beginning of the time period of the measurement interval. , and control the timer to continue counting at the end of the time period of the measurement interval, so that the timer performs total counting of the first duration before suspending the timing and after suspending the timing.

As shown in FIG. 8, when the first message is a dedicated signaling of the terminal device 101, a communication method provided by the embodiment of the present application may include the following steps:

S41: The network device 102 configures first timing information. The first timing information is used to indicate the first duration.

S42: The network device 102 sends the first timing information to the terminal device 101. Correspondingly, the terminal device 101 receives the first timing information.

S43: The terminal device 101 sends a dedicated signaling to the network device 102, and triggers the timing of the first duration.

The dedicated signaling may be used to request to obtain the system message of the dedicated signaling carried by the terminal device 101 . Specifically, the dedicated signaling may carry a list of system messages. The dedicated signaling may also carry the identifier of the terminal device 101 .

It should be understood that the terminal device 101 may trigger the timing of the first duration while sending the dedicated signaling, or trigger the timing of the first duration at a first offset duration after sending the dedicated signaling.

If the terminal device 101 receives the system message of the dedicated signaling carried by the terminal device 101 sent by the network device 102 before the timing of the first duration expires, the steps shown in S44-S45 are executed:

S44: The terminal device 101 determines that the system message of the dedicated signaling carried by the terminal device 101 and sent by the network device 102 is received before the timing of the first duration times out.

S45: The terminal device 101 stops timing the first duration.

If the terminal device 101 does not receive the system message of the dedicated signaling sent by the network device 102 and carried by the terminal device 101 before the timing of the first duration expires, then execute the steps shown in S46-S47:

S46: The terminal device 101 determines that the timing of the first duration times out, and does not receive the system message of the dedicated signaling carried by the terminal device 101 from the network device 102 .

S47: The terminal device 101 sends a third message to the network device 102, where the third message may be used to request to obtain a system message of dedicated signaling carried by the terminal device 101. Exemplarily, the third message may be the same as or different from the first message.

As shown in Figure 9, when the first message is Msg1, a communication method provided by the embodiment of the present application may include the following steps:

S51: The network device 102 configures first timing information. The first timing information is used to indicate the first duration.

S52: The network device 102 sends the first timing information to the terminal device 101. Correspondingly, the terminal device 101 receives the first timing information.

S53: The terminal device 101 sends Msg1 to the network device 102. Msg1 may be used to request to obtain a system message carried by the dedicated signaling of the terminal device 101 . Specifically, the Msg1 may carry a list of system messages. Msg1 may also carry the identifier of the terminal device 101 .

S54: The terminal device 101 receives the RAR message carrying the RAP ID from the network device 102, and performs timing of the first duration. Wherein, the RAR message may carry a request response.

It should be understood that the terminal device 101 may trigger the timing of the first duration while receiving the RAR message, or trigger the timing of the first duration at a second offset duration after receiving the RAR message.

If the terminal device 101 receives the system message of the dedicated signaling carried by the terminal device 101 sent by the network device 102 before the timing of the first duration expires, the steps shown in S55-S56 are executed:

S55: The terminal device 101 receives the system message of the dedicated signaling carried by the terminal device 101 sent by the network device 102 before the timing of the first duration expires.

S56: The terminal device 101 stops timing the first duration.

If the terminal device 101 does not receive the system message of the dedicated signaling sent by the network device 102 and carried by the terminal device 101 before the timing of the first duration expires, then execute the steps shown in S57-S58:

S57: The terminal device 101 determines that the timing of the first duration times out, and does not receive the system message of the dedicated signaling carried by the terminal device 101 from the network device 102 .

S58: The terminal device 101 sends a third message to the network device 102, where the third message may be used to request to obtain a system message of dedicated signaling carried by the terminal device 101. Exemplarily, the third message may be the same as or different from the first message.

As shown in Figure 10, when the first message is Msg3, a communication method provided by the embodiment of the present application may include the following steps:

S61: The network device 102 configures first timing information. The first timing information is used to indicate the first duration.

S62: The network device 102 sends the first timing information to the terminal device 101. Correspondingly, the terminal device 101 receives the first timing information.

S63: The terminal device 101 sends Msg3 to the network device 102. Msg3 may be used to request to obtain a system message carried in the dedicated signaling of the terminal device 101 . Specifically, the Msg3 may carry a system message list. Msg3 may also carry the identifier of the terminal device 101 .

S64: The terminal device 101 receives the Msg4 from the network device 102, and performs timing of the first duration. Wherein, the Msg4 may carry a request response.

It should be understood that the terminal device 101 may trigger the timing of the first duration while receiving the Msg4 message, or trigger the timing of the first duration at a second offset duration after receiving the Msg4 message.

If the terminal device 101 receives the system message of the dedicated signaling carried by the terminal device 101 sent by the network device 102 before the timing of the first duration expires, then execute the steps shown in S65-S66:

S65: The terminal device 101 receives the system message of the dedicated signaling carried by the terminal device 101 sent by the network device 102 before the timing of the first duration expires.

S66: The terminal device 101 stops timing the first duration.

If the terminal device 101 does not receive the system message of the dedicated signaling sent by the network device 102 and carried by the terminal device 101 before the first duration timeout, execute the steps shown in S67-S68:

S67: The terminal device 101 determines that the timing of the first duration times out, and does not receive the system message of the dedicated signaling carried by the terminal device 101 from the network device 102 .

S68: The terminal device 101 sends a third message to the network device 102, where the third message may be used to request to obtain a system message of dedicated signaling carried by the terminal device 101. Exemplarily, the third message may be the same as or different from the first message.

As shown in Figure 11, when the first message is MsgA, a communication method provided in this embodiment of the present application may include the following steps:

S71: The network device 102 configures first timing information. The first timing information is used to indicate the first duration.

S72: The network device 102 sends the first timing information to the terminal device 101. Correspondingly, the terminal device 101 receives the first timing information.

S73: The terminal device 101 sends the MsgA to the network device 102. MsgA may be used to request to obtain a system message carried in dedicated signaling of the terminal device 101 . Specifically, the MsgA may carry a system message list. MsgA may also carry the identity of the terminal device 101 .

S74: The terminal device 101 receives the MsgB from the network device 102, and performs timing of the first duration. Wherein, the MsgB may carry a request response.

It should be understood that the terminal device 101 may trigger the timing of the first duration while receiving the MsgB message, or trigger the timing of the first duration at a second offset duration after receiving the MsgB message.

If the terminal device 101 receives the system message of the dedicated signaling carried by the terminal device 101 sent by the network device 102 before the timing of the first duration expires, the steps shown in S75-S76 are executed:

S75: The terminal device 101 receives the system message of the dedicated signaling carried by the terminal device 101 and sent by the network device 102 before the timing of the first duration expires.

S76: The terminal device 101 stops timing the first duration.

If the terminal device 101 does not receive the system message of the dedicated signaling sent by the network device 102 and carried by the terminal device 101 before the first time-out expires, the steps shown in S77-S78 are executed:

S77: The terminal device 101 determines that the timing of the first duration times out, and does not receive the system message of the dedicated signaling carried by the terminal device 101 from the network device 102 .

S78: The terminal device 101 sends a third message to the network device 102, where the third message may be used to request to obtain a system message of dedicated signaling carried by the terminal device 101. Exemplarily, the third message may be the same as or different from the first message.

As shown in FIG. 12 , the embodiment of the present application also provides a communication method, which enables the terminal device 101 to report handover assistance information according to the number of times the terminal device 101 sends request messages. The method may include the steps of:

S801: The network device 102 configures threshold information, where the threshold information is used to indicate a counting threshold.

S802: The network device 102 sends threshold information to the terminal device 101. Accordingly, the terminal device 101 receives threshold information.

S803: The terminal device 101 sends a first request to the network device 102.

The first request may be used to request to obtain a system message carried in the dedicated signaling of the terminal device 101 . Specifically, the first request may carry a system message list. The first request may also carry the identifier of the terminal device 101 .

S804: The terminal device 101 controls the counter to perform one count.

If the terminal device 101 receives the system message of the dedicated signaling carried by the terminal device 101 sent by the network device 102, then execute the steps shown in S805-S806:

S805: The terminal device 101 determines that the system message of the dedicated signaling carried by the terminal device 101 and sent by the network device 102 is received before the timing of the first duration times out.

S806: The terminal device 101 restores the count of the counter to the initial value.

If the terminal device 101 does not receive the system message of the dedicated signaling sent by the network device 102 and carried by the terminal device 101 before the first duration timeout, execute the steps shown in S807-S808:

S807: The terminal device 101 determines that the timing of the first duration times out, and does not receive the system message of the dedicated signaling carried by the terminal device 101 from the network device 102 .

S808: The terminal device 101 sends a third message to the network device 102, and controls the counter to perform one count.

The third message may be used to request to obtain a system message carried in the dedicated signaling of the terminal device 101 . Exemplarily, the third message may be the same as or different from the first message.

It should be understood that the terminal device 101 may trigger the timing of the first duration again when sending the third message. message, the terminal device 101 may send the third message again, and trigger the timing of the first duration again and control the counter to perform one count.

If the terminal device 101 determines that the count of the counter reaches (or exceeds) the count threshold, the steps shown in S809-S811 are executed:

S809: Determine that the count of the counter reaches (or exceeds) the count threshold.

It should be understood that before the terminal device 101 determines that the count of the counter reaches (or exceeds) the counting threshold, it may send the third message one or more times, and the specific number of times is related to the value of the counting threshold.

S810: The terminal device 101 sends handover assistance information to the network device 102. The handover assistance information is used by the network device 102 for handover of the serving cell of the terminal device 101 . Specifically, the handover assistance information may include an indication of failure to obtain system information or a timeout indication of obtaining system information. Accordingly, the network device 102 receives handover assistance information.

S811: The network device 102 judges whether to switch the serving cell of the terminal device 101 according to the handover assistance information. The manner in which the network device 102 determines whether to switch the cell of the terminal device 101 and the manner in which the serving cell of the terminal device 101 is switched can refer to the prior art, which is not specifically limited in this application.

In the above-mentioned embodiments provided in the present application, the methods provided in the embodiments of the present application, that is, the method flow, are introduced from the perspective of functions implemented by the terminal device. In order to implement the various functions in the method provided by the above embodiments of the present application, the terminal device may include a hardware structure and/or a software module, and implement the above various functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether one of the above-mentioned functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.

As shown in FIG. 13 , a communication device provided by an embodiment of the present application may include a communication module 1301 and a processing module 1302 , and the communication module 1301 and the processing module 1302 are coupled to each other. The communication device 1300 may be used to execute the steps performed by the terminal device 101 in the above method embodiments. The communication module 1301 can be used to support the communication device 1300 to communicate. The communication module 1301 can have a wireless communication function, for example, can communicate with other communication devices through wireless communication. The processing module 1302 can be used to support the communication device 1300 to execute the processing actions of the terminal device in the above method embodiments, including but not limited to: generating information and messages sent by the communication module 1301, and/or performing processing on signals received by the communication module 1301 demodulation decoding and so on.

When performing the steps performed by the terminal device in the above method embodiments, the above communication module 1301 can be used to perform the sending and/or receiving action of the terminal device in the first aspect and/or any possible design of the first aspect, such as for Execute the action of the terminal device sending information, message or signaling to the network equipment, or perform the action of receiving information, message or signaling from the network equipment. And/or, the processing module 1302 can be used to execute the processing action of the terminal device in any possible design of the first aspect and/or the first aspect, such as controlling the communication module 1301 to receive and/or send information, messages or signaling, and storage of information.

Exemplarily, the communication module 1301 may be configured to receive first timing information from a network device, where the first timing information is used to indicate a first duration, and the first duration is an interval between two request messages sent by the terminal device. The minimum time interval, each of the request messages is used to request to obtain a system message of dedicated signaling carried by the terminal device.

In a possible example, the communication module 1301 is further configured to send a first message to the network device, where the first message is used to request to acquire a system message of dedicated signaling carried by the terminal device. The processing module 1302 may trigger the timing of the first duration when sending the first message, or, the processing module 1302 may receive the second message corresponding to the first message (or called for Timing of the first duration is triggered when responding to the first message (the second message). After the first duration times out, if the terminal device does not receive the system message sent by the network device through the dedicated signaling of the terminal device, the communication module 1301 may send a third message, the The third message is used to request to obtain the system message of the dedicated signaling carried by the terminal device.

Specifically, the processing module 1302 may trigger a first timer to start counting the first duration when sending the first message, or the processing module 1302 may trigger a second timer when sending the first message. The timer restarts the timing of the first duration. Wherein, the first timer may be the same as or different from the second timer.

The above first message may be dedicated signaling of the terminal device. The specific signaling can be scrambled by the specific identification of the terminal device.

The above first message may be carried on a signaling radio bearer.

In another example, the processing module 1302 may trigger a third timer to start counting the first duration when the terminal device receives the second message through the communication module 1301, or, the The processing module 1302 may trigger a fourth timer to restart timing of the first duration when the terminal device receives the second message through the communication module 1301 . It should be understood that the third timer may be the same as or different from the fourth timer. The third timer may be the same as or different from the above first timer and the second timer, and the fourth timer may be the same as or different from the above first timer and the second timer.

In this example, the first message may be a first random access request message, the second message may be a first random access response message including only a random access preamble identifier, and the second message is for the network device to The terminal device responds with the first message sent by Msg1. Specifically, the first random access request message may be the random access request message Msg1 in the four-step random access process. The second message may be a random access response (random access response, RAR) message including only a random access preamble identifier (RAP ID).

Alternatively, the first message may be random access uplink data, and the second message may be a contention resolution message. Specifically, the first random access request message may be the random access uplink data Msg3 in the four-step random access process. The second message may be a contention resolution message Msg4 in the four-step random access process.

Alternatively, the first message may be a second random access request message, and the second message may be a second random access response message. Specifically, the first random access request message may be the random access request message MsgA in the two-step random access process. The second message may be a random access response message MsgB in the two-step random access process.

The above first message may include an identifier of the terminal device and/or a system message list. Wherein, the identifier of the terminal device may be a cell-radio network temporary identifier (cell-radio network temporary identifier, TC-RNTI) of the terminal device. The terminal device that initiates the system information acquisition request can be determined by the identifier of the terminal device. The system message list is used to indicate the system messages required by the terminal device. The system message list may include one or more system information blocks (system information block, SIB) or one or more system messages. Wherein, there is a correspondence between the system message block and the system message required by the terminal device 101 (or in other words, one or more system message blocks may be mapped as a system message).

If the terminal device receives a system message carried by the dedicated signaling of the terminal device from the network device through the communication module 1301, the processing module 1302 may stop timing the first duration.

Exemplarily, when the time period for performing the timing of the first duration overlaps with the time period of the measurement interval configured by the network device, the processing module 1302 may pause during the overlapping time period Timing of the first duration is performed.

In addition, the processing module 1302 can also maintain a counter. After sending the request message each time, the processing module 1302 can perform a count of the counter. The request message is used to request to obtain the dedicated signaling carried by the terminal device. system message, the request message includes the first message and/or the third message; the processing module 1302 may trigger the communication module 1301 to send a message to the The network device sends the handover assistance information, so that the network device 102 can switch the serving cell of the terminal device 101 according to the handover assistance information, so as to improve the transmission quality of the terminal device 101 . The handover assistance information is used for handover of the serving cell of the terminal device. The above auxiliary handover information may be an indication of failure to obtain system information or a timeout indication of obtaining system information. The handover assistance information may be used by the network device to judge whether to handover the serving cell of the terminal device.

The above counting threshold may be configured by the network device, or the counting threshold may be defined by a protocol or determined in a preconfigured manner.

Exemplarily, if the terminal device receives a system message of dedicated signaling carried by the terminal device from the network device through the communication module 1301, the processing module 1302 may restore the count value of the counter to an initial value , there is no need to report handover auxiliary information at this time.

The terminal device may also include a structure as shown in FIG. 14 . For ease of understanding and illustration, in FIG. 14 , a mobile phone is taken as an example to illustrate the structure of the communication device 1400 . As shown in FIG. 14 , a communication device 1400 may include a processor 1401 , a memory 1402 and a transceiver 1403 .

The processor 1401 above can be used to process communication protocols and communication data, control the second terminal device, execute software programs, process data of software programs, and the like. The memory 1402 may be used to store programs and data, and the processor 1401 may execute the method performed by the second terminal device in the embodiment of the present application based on the programs.

The transceiver 1403 may include a radio frequency unit and an antenna. Among them, the radio frequency unit can be used for converting baseband signals and radio frequency signals and processing radio frequency signals. Antennas can be used to send and receive radio frequency signals in the form of electromagnetic waves. In addition, only the radio frequency unit may be regarded as the transceiver 1403 , then the communication device 1400 may include a processor 1401 , a memory 1402 , a transceiver 1403 and an antenna.

In addition, the communication device 1400 may further include an input and output device 1404, such as a touch screen, a display screen, or a keyboard, and other components that can be used to receive data input by a user and output data to the user. It should be noted that some types of communication devices may not have input and output devices.

It should be understood that the above communication module 701 may have the structure shown in the transceiver 1403, that is, include a radio frequency unit and an antenna; or, the communication module 701 may include the above radio frequency unit. The above processing module 702 may include a processor 1401 , or include a processor 1401 and a storage 1402 .

The above communication device 1400 may also be constituted by a chip. For example, the chip includes a processor 1401 . In addition, the chip may further include a memory 1402 and a transceiver 1403, wherein any two of the memory 1402, the transceiver 1403, and the processor 1401 may be coupled to each other.

When executing the method shown in the embodiment of the present application, the transceiver 1403 may be used to execute the steps executed by the communication module 701 above. And, the processor 1401 invokes the program stored in the storage 1402 to execute the above steps executed by the processing module 702 .

When the communication device in this embodiment is a terminal device, its structure can also refer to the device shown in FIG. 15 . As an example, the device may perform functions similar to the processor 1401 in FIG. 14 . In FIG. 15 , the device includes a processor 1510 , a transmit data processor 1520 , and a receive data processor 1530 . The processing module 1302 in the foregoing embodiment may be the processor 1510 in FIG. 15 , and complete corresponding functions. The communication module 1301 in the foregoing embodiment may be the sending data processor 1520 and/or the receiving data processor 1530 in FIG. 15 . Although a channel encoder and a channel decoder are shown in FIG. 15 , it can be understood that these modules do not constitute a limiting description of this embodiment, but are only illustrative.

Fig. 16 shows another form of this embodiment. The processing device 1600 may include modules such as a modulation subsystem, a central processing subsystem, and a peripheral subsystem. The communication device in this embodiment can be used as a modulation subsystem therein. Specifically, the modulation subsystem may include a processor 1603 and an interface 1604 . The processor 1603 completes the functions of the processing module 1302 above, and the interface 1604 completes the functions of the communication module 1301 above. As another variation, the modulation subsystem includes a memory 1606, a processor 1603, and a program stored in the memory 1606 and operable on the processor. When the processor 1603 executes the program, the method of the processing module 1302 described above is realized. It should be noted that the memory 1606 can be non-volatile or volatile, and its location can be located inside the modulation subsystem or in the processing device 1600, as long as the memory 1606 can be connected to the The processor 1603 is sufficient.

As shown in FIG. 17 , a communication device provided by an embodiment of the present application may include a communication module 1701 and a processing module 1702 , and the communication module 1701 and the processing module 1702 are coupled to each other. The communication apparatus 1700 may be used to execute the steps executed by the network device in the above method embodiments. The communication module 1701 can be used to support the communication device 1700 to communicate, and the communication module 1701 can have a wireless communication function, for example, can communicate with other communication devices through wireless communication. The processing module 1702 can be used to support the communication device 1700 to execute the processing actions of the terminal device in the above method embodiments, including but not limited to: generating information and messages sent by the communication module 1701, and/or performing processing on signals received by the communication module 1701 demodulation decoding and so on.

When executing the steps performed by the network device in the above method embodiments, the processing module 1702 can be used to determine the first timing information, the first timing information is used to indicate the first duration, and the first duration is sent by the terminal device The minimum time interval between two request messages, each of which is used to request to obtain a system message of dedicated signaling carried by the terminal device. The communication module 1701 may be configured to send the first timing information to the terminal device.

The above first timing information is carried in a broadcast message or a dedicated signaling of the terminal device.

The communication module 1701 is further configured to receive handover assistance information from the terminal device, the handover assistance information is used for handover of the serving cell of the terminal device, and the processing module 1702 is configured to determine whether to switch the terminal according to the handover assistance information The serving cell of the device.

In addition, when the communication device in this embodiment is a network device, the communication device may have a structure as shown in FIG. 18 . Wherein, the communication device 1800 includes one or more remote radio units (remote radio unit, RRU) 1810 and one or more baseband units (baseband unit, BBU) (also called digital unit, digital unit, DU) 1820. The RRU 1810 may be called a communication module, corresponding to the communication module 1701 in FIG. 17 , and configured to perform the above steps performed by the communication module 1701 . The RRU 1810 may also be called a transceiver, a transceiver circuit, or a transceiver, etc., and may include at least one antenna 1811 and a radio frequency unit 1812 . The RRU 1810 part is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals and baseband signals, for example, for sending resource indications to terminal equipment. The part of the BBU 1820 is mainly used for baseband processing, controlling the base station, and the like. The RRU 1810 and the BBU 1820 may be physically set together, or physically separated, that is, a distributed base station.

The BBU 1820 is the control center of the base station, and may also be called a processing module, which may correspond to the processing module 1702 in FIG. 17 , and is used to perform the above steps performed by the processing module 1702 . The BBU 1820 can also be used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spread spectrum and so on. For example, the BBU 1820 may be used to control the network device to execute the operation procedures related to the network device in the foregoing method embodiments, for example, to generate an RRC message and first information, and so on.

In an example, the BBU 1820 may be composed of one or more single boards, and multiple single boards may jointly support a wireless access network of a single access standard (such as an LTE network), or may separately support wireless access networks of different access standards. Wireless access network (such as LTE network, 5G network or other networks). The BBU 1820 also includes a memory 1821 and a processor 1822 . The memory 1821 is used to store necessary instructions and data. The processor 1822 is used to control the network device to perform necessary actions, for example, to control the network device to execute the operation process performed by the CU and/or the CU in the foregoing method embodiments.

Exemplarily, the above steps performed by the processing module 1702 may be performed by the processor 1822 . The memory 1821 and the processor 1822 may serve one or more boards. That is to say, memory and processors can be set independently on each single board. It may also be that multiple single boards share the same memory and processor. In addition, necessary circuits can also be set on each single board.

Based on the same idea as the above-mentioned method embodiments, the embodiments of the present application also provide a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the computer executes the above-mentioned method embodiments and method implementations. An operation performed by a terminal device or a network device in any possible implementation manner of the example.

Based on the same idea as the above method embodiment, the present application also provides a computer program product, which can enable the computer to implement the above method embodiment and any possible implementation manner of the method embodiment when the computer program product is invoked and executed by the computer. Operations performed by terminal devices or network devices.

Based on the same idea as the above method embodiments, the present application further provides a chip or a chip system, where the chip may include a processor. The chip may also include memory (or storage module) and/or transceiver (or communication module), or, the chip is coupled with memory (or storage module) and/or transceiver (or communication module), wherein the transceiver ( or communication module) can be used to support the chip for wired and/or wireless communication, and the memory (or storage module) can be used to store a program, and the processor can call the program to implement any of the above method embodiments and method embodiments. An operation performed by a terminal device or a network device in an implementation manner of . The system-on-a-chip may include the above-mentioned chips, and may also include the above-mentioned chips and other discrete devices, such as memory (or storage module) and/or transceiver (or communication module).

Based on the same idea as the above method embodiment, the present application further provides a communication system, where the communication system may include the above terminal device and/or network device. The communication system may be used to implement the operations performed by the terminal device or the network device in any of the foregoing method embodiments and any possible implementation manners of the method embodiments. Exemplarily, the communication system may have a structure as shown in FIG. 1 .

Taking a communication system including a terminal device and a network device as an example, the network device can be used to determine first timing information, and the first timing information is used to indicate a first duration, and the first duration is two messages sent by the terminal device. A minimum time interval between request messages, each of which is used to request to obtain a system message of dedicated signaling carried by the terminal device. The network device may also send the first timing information to the terminal device. Correspondingly, the terminal device can receive the first timing information.

Embodiments of the present application are described with reference to flowcharts and/or block diagrams of methods, devices, and computer program products involved in the embodiments. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

Claims (20)

1. A method of communication, comprising:

the terminal device receives first timing information from the network equipment, wherein the first timing information is used for indicating a first time length, the first time length is the minimum time interval between two request messages sent by the terminal device, and each request message is used for requesting to acquire a system message of a special signaling carried by the terminal device;

The method further comprises the steps of:

the terminal device sends a first message to the network equipment, wherein the first message is used for requesting to acquire a system message of a special signaling carried by the terminal device;

the terminal device triggers to execute the timing of the first duration when sending the first message, or triggers to execute the timing of the first duration when receiving a second message for responding to the first message;

after the first time period is overtime, if the terminal device does not receive the system message sent by the network equipment through the dedicated signaling of the terminal device, the terminal device sends a third message, wherein the third message is used for requesting to acquire the system message of the dedicated signaling carried by the terminal device;

wherein when there is a period of time overlapping a period of time of a measurement interval configured by the network device for which the timing of the first time length is performed, the method further comprises:

the terminal device pauses execution of the timing of the first duration for the overlapping time period.

2. The method of claim 1, wherein the terminal device triggering execution of the timing of the first duration upon transmission of the first message comprises:

Triggering a first timer to start the timing of the first duration when the terminal device sends the first message; or,

the terminal device triggers a second timer to restart the timing of the first duration when sending the first message.

3. A method according to claim 1 or 2, characterized in that the first message is dedicated signaling of the terminal device.

4. The method of claim 3, wherein the first message is carried on a signaling radio bearer.

5. The method of claim 1, wherein the terminal device triggering execution of the timing of the first duration upon receipt of a second message in response to the first message comprises:

triggering a third timer to start timing of the first duration when the terminal device receives the second message; or,

and triggering a fourth timer to restart the timing of the first duration when the terminal device receives the second message.

6. The method of claim 1 or 5, wherein the first message is a first random access request message and the second message is a first random access response message including only a random access preamble identity; or,

The first message is random access uplink data, and the second message is a contention resolution message; or,

the first message is a second random access request message, and the second message is a second random access response message.

7. The method according to any of claims 1, 2, 4 or 5, wherein the first message comprises an identification of the terminal device and/or a system message list indicating system messages required by the terminal device.

8. The method of any one of claims 1, 2, 4, or 5, wherein the method further comprises:

the terminal device receiving a system message of dedicated signaling carried on the terminal device from the network equipment;

the terminal device stops executing the timing of the first duration.

9. The method of any one of claims 1, 2, 4, or 5, wherein the method further comprises:

the terminal device performs one counting of a counter after each time of sending the request message, wherein the request message is used for requesting to acquire a system message of dedicated signaling carried on the terminal device, and the request message comprises the first message and/or the third message;

And the terminal device sends switching auxiliary information to the network equipment after the count value of the counter reaches a count threshold, wherein the switching auxiliary information is used for switching the service cell of the terminal device.

10. The method of claim 9, wherein the count threshold is configured by the network device.

11. The method of claim 9, wherein the method further comprises:

the terminal device receiving a system message of dedicated signaling carried on the terminal device from the network equipment;

the terminal device restores the count value of the counter to an initial value.

12. A method of communication, comprising:

the network equipment determines first timing information, wherein the first timing information is used for indicating a first time length, the first time length is the minimum time interval between two request messages sent by a terminal device, and each request message is used for requesting to acquire a system message of a special signaling carried by the terminal device;

the network equipment sends the first timing information to the terminal device;

the method further comprises the steps of:

the network equipment receives a first message from the terminal device, wherein the first message is used for requesting to acquire a system message of a special signaling carried on the terminal device;

The condition for triggering the timing of the first duration to be executed is that the terminal device sends the first message, or the condition for triggering the timing of the first duration to be executed is that the terminal device receives a second message for responding to the first message;

after the first time period is overtime, if the terminal device does not receive the system message sent by the network equipment through the dedicated signaling of the terminal device, the network equipment receives a third message from the terminal device, wherein the third message is used for requesting to acquire the system message of the dedicated signaling carried by the terminal device;

wherein when there is a time period overlapping a time period of a measurement interval configured by the network device with a time period in which the timing of the first time period is performed, the timing of the first time period is suspended in the overlapping time period.

13. The method of claim 12, wherein the first timing information is carried on a broadcast message or dedicated signaling of the terminal device.

14. The method of claim 12 or 13, wherein the method further comprises:

the network equipment receives handover assistance information from the terminal device, the handover assistance information being used for handover of a serving cell of the terminal device;

And the network equipment determines whether to switch the service cell of the terminal device according to the switching auxiliary information.

15. A communication device comprising a communication module for communication of the communication device and a processing module for performing the method according to any of claims 1-11 based on the communication module.

16. A communication device comprising a communication module for communication of the communication device and a processing module for performing the method according to any of claims 12-14 based on the communication module.

17. A communication device comprising a processor for executing instructions stored in a memory to implement the method of any one of claims 1-11.

18. A communications device comprising a processor for executing instructions stored in a memory to implement the method of any one of claims 12-14.

19. A computer readable storage medium storing instructions which when executed by a processor perform the method of any one of claims 1 to 11 or which when executed by a processor perform the method of any one of claims 12 to 14.

20. A communication system comprising a communication device according to claim 15 or 17 and a communication device according to claim 16 or 18.

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