CN116963198A

CN116963198A - Communication method and device

Info

Publication number: CN116963198A
Application number: CN202210410656.5A
Authority: CN
Inventors: 卓超; 杨帆
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2023-10-27
Also published as: WO2023202263A1

Abstract

The application discloses a communication method and a communication device, which are used for reducing standby power consumption of terminal equipment. The method comprises the following steps: when the first terminal device enters the stationary mode, the first terminal device may acquire a paging detection period of at least one cell through the received system information from the at least one cell. After measuring the signal strength of the at least one cell, the first terminal device may determine a candidate cell set according to the signal strength of the at least one cell and the paging detection period, and camp on a first cell in the candidate cell set; wherein the candidate cell set includes: the signal intensity in at least one cell is larger than or equal to a first threshold value, and the cell with the largest paging detection period. By the method, the first terminal equipment can select the cell with the signal strength larger than or equal to the first threshold and the largest paging detection period to reside, so that the paging message can be detected by adopting at least the largest paging detection period, and the standby power consumption of the first terminal equipment can be reduced.

Description

Communication method and device

Technical Field

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

Background

Currently, in a mobile communication system, a terminal device may camp on a cell, which may be referred to as a camping cell or a serving cell. In this way, the terminal device may receive a paging message from the serving cell when the terminal device is in an idle state; when the terminal device is in a connected state, the terminal device may interact with the serving cell, e.g., the terminal device receives paging messages and/or downlink data from the serving cell, the terminal device sends uplink data to the serving cell, etc.

When the terminal device selects a serving cell, the terminal device may perform a cell search. When the target cell meets the residence condition, the terminal equipment can initiate residence of the target cell.

However, when the terminal device selects the serving cell, only whether the target cell satisfies the camping condition is considered, and the standby power consumption of the terminal device is high. Therefore, a method for reducing standby power consumption of the terminal device is required.

Disclosure of Invention

The application provides a communication method and a communication device, which are used for reducing standby power consumption of terminal equipment.

In a first aspect, an embodiment of the present application provides a communication method. The method may be applied in a communication system as shown in fig. 1 below. The method comprises the following steps: when the first terminal device enters a stationary mode, the first terminal device may receive system information from at least one cell and measure a signal strength of the at least one cell; wherein the system information from the at least one cell includes information indicating a paging detection period of any one of the at least one cell. Then, the first terminal equipment can determine a candidate cell set according to the paging detection period and the signal strength of at least one cell, and stay in the first cell in the candidate cell set; wherein the candidate set of cells may comprise: the signal intensity in at least one cell is larger than or equal to a first threshold value, and the cell with the largest paging detection period.

By the method, the first terminal equipment can select the cell with the signal strength larger than or equal to the first threshold and the largest paging detection period to reside, so that the paging message can be detected by adopting at least the largest paging detection period, and the standby power consumption of the first terminal equipment can be reduced.

In one possible design, after the first terminal device camps on the first cell, it may detect whether the camping first cell is a cell configured to send multiple paging messages; when the first cell is not configured to transmit the multiple paging message, the first terminal device may camp on a next cell in the candidate set of cells and detect whether it is a cell configured to transmit the multiple paging message. The first terminal device may camp on a target cell, which is a cell in the candidate set of cells that is configured to send the multiple paging message.

By this design, the first terminal device may camp on a target cell in the candidate set of cells that is configured to send multiple paging messages. When the first terminal device is in the stationary mode and resides in a cell configured to transmit paging messages a plurality of times, the first terminal device may further lengthen the period of detecting the paging messages, thereby further reducing the power consumption of the first terminal device.

In one possible design, the first terminal device may detect whether the camped first cell is a cell configured to send multiple paging messages by: when M paging messages from the first cells are received in the paging detection periods of the continuous M first cells, and each received paging message contains identification information of the second terminal equipment, the first terminal equipment can determine that the first cell is a cell configured to send paging messages for multiple times; when M paging messages from the first cells are not received in the paging detection periods of the consecutive M first cells, the first terminal device may determine that the first cell is not a cell configured to transmit the paging message a plurality of times; wherein M is an integer greater than or equal to 2.

By the design, the first terminal equipment can determine whether the first cell is a cell configured to send the paging message for multiple times by detecting the paging message, and the operation is simpler.

In one possible design, after camping on the target cell, the first terminal device may receive a paging message from the target cell according to the first period; the first period is N times of the paging detection period of the target cell, and N is an integer greater than or equal to 2. By the design, the first terminal equipment can further lengthen the period of detecting the paging message after residing in the target cell configured to send the paging message for a plurality of times in the candidate cell set, thereby further reducing the power consumption of the first terminal equipment.

In one possible design, the first terminal device may re-camp to the first cell when the candidate set of cells does not include a cell configured to send multiple paging messages. The first cell may be any cell in the candidate cell set, or may be a cell in a system with minimum standby power consumption of the first terminal device in the candidate cell set, or may be a cell with maximum signal strength in the candidate cell set, or may be a cell in a system with highest system in the candidate cell set. By the design, when the candidate cell set does not contain the cell configured to send the paging message for multiple times, the first terminal equipment can still reside in the cell with the signal strength larger than or equal to the first threshold and the largest paging detection period, so that the paging message can be detected by adopting the largest paging detection period, and the standby power consumption of the first terminal equipment can be reduced.

In one possible design, the first terminal device may detect only the signal strength of the target cell after camping on the target cell. In the stationary mode, the first terminal device has no mobility requirement and does not need to perform cell reselection or cell handover. By means of the design, in the static mode, the first terminal equipment only detects the signal intensity of the target cell (namely the current service cell) and does not detect the signal intensity of the adjacent cell, and therefore the power consumption of the first terminal equipment can be reduced.

In one possible design, the first terminal device may detect the signal strength of the target cell by: the first terminal equipment detects the signal intensity of the target cell by using a third period; when the signal intensity of the target cell in the second time period is greater than or equal to a second threshold value, the first terminal equipment can detect the signal intensity of the target cell by using a fourth period; wherein the fourth period is greater than the third period. By the design, when the first terminal equipment detects that the signal intensity of the target cell is continuously greater than or equal to the second threshold value in the second duration, the first terminal equipment can adopt a larger period to detect the signal intensity of the target cell, so that the time interval for detecting the signal intensity of the target cell is prolonged; in this way, the time for the first terminal device to stop detecting the signal strength of the target cell is also longer, so that the power consumption of the first terminal device can be reduced.

In one possible design, the first terminal device may prevent reporting of the measurement report after detecting the signal strength of the target cell when the first terminal device is in the RRC connected state. In the stationary mode, the first terminal device has no mobility requirement; in this way, cell handover is not required even if the first terminal device is in RRC connected state. By the design, the first terminal equipment does not report the measurement report in the static mode, so that the power consumption of the first terminal equipment can be reduced, and resources for transmitting the measurement report can be saved. And the first terminal equipment does not report the measurement report, and unnecessary triggering of the base station to initiate cell switching can also be avoided.

In one possible design, the first terminal device may determine the first set based on signal strength of at least one cell prior to camping on the first cell; wherein the first set may comprise: a cell in which the signal strength in the at least one cell is greater than or equal to a first threshold; after camping on the first cell, when the first terminal device exits the stationary mode, the first terminal device may camp on a fourth cell with the highest system in the first set. By this design, after exiting the stationary mode, the first terminal device can quickly camp on the fourth cell with the highest standard in the first set determined before, without having to re-measure the cells, thereby reducing the time for changing the camping cell (also referred to as cell reselection).

In one possible design, the first terminal device may receive the paging message from the target cell according to the paging detection period of the target cell when the first terminal device exits the stationary mode after camping on the target cell. After the first terminal device exits the stationary mode, if the paging message from the target cell is also received in multiples of the paging detection period of the target cell, it is possible that the paging message from the target cell is not received due to the movement of the first terminal device. By this design, after exiting the stationary mode, the first terminal device receives the paging message from the target cell using the paging detection period of the target cell, and the likelihood that the first terminal device receives the paging message from the target cell can be improved.

In one possible design, after camping on the target cell, the first terminal device may release the RRC connection between the first terminal device and the target cell when the first terminal device is in the RRC connected state and it is detected that the first terminal device has no uplink data and no downlink data. By this design, the first terminal device may actively initiate release of the RRC connection between the first terminal device and the target cell.

In a second aspect, embodiments of the present application provide a communication device, which may be used to implement the method of the first aspect.

The apparatus may include:

a communication unit for receiving system information from at least one cell when the communication device enters a stationary mode; wherein the system information from the at least one cell includes information indicating a paging detection period of any one of the at least one cell;

a processing unit for: measuring signal strength of at least one cell; a set of candidate cells is determined based on the paging detection period and the signal strength of at least one cell. Wherein the candidate cell set includes: the signal intensity in at least one cell is larger than or equal to a first threshold value, and the cell with the largest paging detection period; and camping to a first cell, wherein the first cell is a cell in the candidate cell set.

In one possible design, the processing unit is further configured to: after residing to the first cell, detecting whether the residing first cell is a cell configured to send a plurality of paging messages; when the first cell is not configured to send the paging message for multiple times, the cell is resided in the next cell in the candidate cell set and whether the cell is configured to send the paging message for multiple times is detected; and camping to a target cell, wherein the target cell is a cell configured in the candidate cell set to send a plurality of paging messages.

In one possible design, the processing unit is specifically configured to: when M paging messages from the first cells are received through a communication unit in the paging detection periods of the continuous M first cells, and each received paging message contains identification information of the second terminal equipment, determining the first cell as a cell configured to send multiple paging messages; when M paging messages from the first cells are not received through the communication unit in the paging detection periods of the continuous M first cells, determining that the first cells are not configured to send paging messages for multiple times; wherein M is an integer greater than or equal to 2.

In one possible design, the communication unit is further configured to: after camping on the target cell, receiving a paging message from the target cell according to the first period; the first period is N times of the paging detection period of the target cell, and N is an integer greater than or equal to 2.

In one possible design, the processing unit is specifically configured to: when the candidate cell set does not include a cell configured to transmit a plurality of paging messages, re-camping to the first cell.

In one possible design, the processing unit is further configured to: after camping on the target cell, only the signal strength of the target cell is detected.

In one possible design, the processing unit is further configured to: when the communication device is in the RRC connected state, reporting of the measurement report is prevented after detecting the signal strength of the target cell.

In one possible design, the processing unit is further configured to: before camping on a first cell, determining a first set according to signal strength of at least one cell, wherein the first set comprises: a cell in which the signal strength in the at least one cell is greater than or equal to a first threshold; after camping on the first cell, when the communication device exits the stationary mode, camping on a fourth cell with the highest standard in the first set.

In one possible design, the communication unit is further configured to: after camping on the target cell, when the communication device exits the stationary mode, the paging message from the target cell is received according to the paging detection period of the target cell.

In one possible design, the processing unit is further configured to: after camping on the target cell, when the communication device is in an RRC connected state and no uplink data and no downlink data are detected by the communication device, the RRC connection between the communication device and the target cell is released.

In a third aspect, an embodiment of the present application provides a communication device, which may be a terminal, or may be a chip for a terminal. The apparatus has the functionality to implement the method of the first aspect described above or any of its possible implementations. The functions can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a fourth aspect, embodiments of the present application provide a communications apparatus comprising a processor and a memory, optionally further comprising a transceiver. The memory is for storing a computer program or instructions, and the processor is for calling and running the computer program or instructions from the memory, which when executed by the processor causes the wireless communication device to perform the functions of the method of the first aspect described above or any one of the possible implementations thereof.

In the alternative, the processor is one or more, and the memory is one or more.

Alternatively, the memory may be integrated with the processor or the memory may be separate from the processor.

Alternatively, the memory may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory.

In a fifth aspect, an embodiment of the present application provides a communication system, including: a terminal device for performing the method provided in the first aspect, and a base station for communicating with the terminal device.

In a sixth aspect, embodiments of the present application also provide a computer program product comprising: a computer program (which may also be referred to as code, or instructions) which, when run on a computer, causes the computer to perform the method provided in the first aspect described above.

In a seventh aspect, an embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored, which when executed by a computer, causes the computer to perform the method provided in the first aspect.

In an eighth aspect, an embodiment of the present application further provides a chip, where the chip is configured to read a computer program stored in a memory, and perform the method provided in the first aspect.

In a ninth aspect, an embodiment of the present application further provides a chip system, where the chip system includes a processor, configured to support a computer device to implement the method provided in the first aspect. In one possible design, the chip system further includes a memory for storing programs and data necessary for the computer device. The chip system may be formed of a chip or may include a chip and other discrete devices.

In a tenth aspect, an embodiment of the present application further provides a wireless communication apparatus, including: interface circuitry and processing circuitry. The interface circuit may include an input circuit and an output circuit. The processing circuitry is to receive signals via the input circuitry and to transmit signals via the output circuitry such that the method of the first aspect and any one of the possible implementations is implemented.

In a specific implementation process, the wireless communication device may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the output signal may be output by, for example and without limitation, a transmitter and transmitted by a transmitter, and the input circuit and the output circuit may be the same circuit, which functions as the input circuit and the output circuit, respectively, at different times. The embodiment of the application does not limit the specific implementation modes of the processor and various circuits.

In one implementation, the wireless communication apparatus may be a wireless communication device, i.e., a computer device supporting wireless communication functionality. Specifically, the wireless communication device may be a terminal such as a smart phone, or may be a radio access network device such as a base station. The system-on-chip may also be referred to as a system-on-chip (SoC), or simply as a SoC chip. The communication chip may include a baseband processing chip and a radio frequency processing chip. The baseband processing chip is sometimes also referred to as a modem (modem) or baseband chip. The radio frequency processing chip is sometimes also referred to as a radio frequency transceiver (transceiver) or radio frequency chip. In a physical implementation, some or all of the communication chips may be integrated inside the SoC chip. For example, the baseband processing chip is integrated in the SoC chip, and the radio frequency processing chip is not integrated with the SoC chip. The interface circuit may be a radio frequency processing chip in the wireless communication device, and the processing circuit may be a baseband processing chip in the wireless communication device.

In yet another implementation, the wireless communication apparatus may be part of a device in a wireless communication device, such as an integrated circuit product, e.g., a system chip or a communication chip. The interface circuit may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuitry, etc. on the chip or system of chips. A processor may also be embodied as processing or logic circuitry.

The technical effects achieved by any one of the second to tenth aspects described above may be described with reference to the technical effects achieved by the first aspect described above, and the description will not be repeated.

Drawings

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;

FIG. 2 is a flow chart of a communication method according to an embodiment of the present application;

FIG. 3 is a flow chart of another communication method according to an embodiment of the present application;

fig. 4 is a schematic diagram of a UE in an idle state and a connected state in another communication method according to an embodiment of the present application;

fig. 5 is a block diagram of a communication device according to an embodiment of the present application;

fig. 6 is a block diagram of a communication device according to an embodiment of the present application.

Detailed Description

The application provides a communication method and a communication device, which are used for reducing standby power consumption of terminal equipment. The method and the device are based on the same technical conception, and because the principles of solving the problems are similar, the implementation of the device and the method can be mutually referred to, and the repetition is not repeated.

In the following, some terms in the embodiments of the present application are explained for easy understanding by those skilled in the art.

1) The base station is a device for accessing a terminal device to a wireless network in a communication system. A base station is a node in a radio access network, which may also be referred to as a network device, a radio access network (radio access network, RAN) node (or device), AN Access Network (AN) node (or device), or AN Access Point (AP).

Currently, some examples of base stations are: new generation Node bs (generation Node B, gNB), transmission reception points (transmission reception point, TRP), evolved Node bs (enbs), node bs (Node bs, NB), home base stations (e.g., home evolved NodeB, or home Node bs, HNBs), base Band Units (BBU), enterprise long term evolution (long term evolution, LTE) discrete narrowband aggregation (Enterprise LTE discrete spectrum aggregation, LTE-DSA) base stations, and the like.

In addition, in one network architecture, a base station may include a Centralized Unit (CU) node and a Distributed Unit (DU) node. The structure splits the protocol layer of the eNB in the LTE system, the functions of part of the protocol layer are controlled in the CU in a centralized way, and the functions of the rest part or all of the protocol layer are distributed in DUs, so that the CU controls the DUs in a centralized way.

2) A terminal device is a device that provides voice and/or data connectivity to a user. The terminal device may also be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc.

For example, the terminal device may be a handheld device having a wireless connection function, various in-vehicle devices, a roadside unit, or the like. Currently, examples of some terminal devices are: a mobile phone, a tablet, a notebook, a palm, a mobile internet device (mobile internet device, MID), a point of sale (POS), a wearable device, a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned aerial vehicle (self driving), a wireless terminal in teleoperation (remote medical surgery), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), various smart meters (smart water meter, smart gas meter), an eLTE-DSA UE, a device with access backhaul integration (integrated access and backhaul, IAB) capability, a vehicle electronic control unit (electronic control unit, ECU), etc., a vehicle-mounted computer, a vehicle-mounted system, a remote information processor (smart BOX, T-BOX), etc.

3) Radio resource control (radio resource control, RRC) connected state. In a mobile communication system, an RRC connection state of a terminal device includes: RRC connected (rrc_connected), RRC idle (rrc_idle).

When the terminal equipment is in an idle state, the RRC connection between the terminal equipment and the base station is disconnected, the base station and the terminal equipment no longer store the context information of the terminal equipment, and the terminal equipment can receive the broadcast information (such as system information) and the paging message sent by the base station.

When the terminal equipment is in a connection state, RRC connection exists between the terminal equipment and the base station, and the terminal equipment and the base station can communicate through the RRC connection. In the RRC connected state, if a cell handover failure, a radio link failure, a RRC connection reconfiguration (RRC connection reconfiguration) procedure failure, etc. occur, the terminal device triggers the RRC connection reestablishment procedure.

4) Radio access technology (radio access technology, RAT) adopted for mobile communication systemsCommunication techniques used. For example, RATs may include, but are not limited to: fourth generation (4) ^th geneticin, 4G), fifth generation (5 ^th generatin, 5G), worldwide interoperability for microwave access (world interoperability for microwave access, wiMAX), etc., may also include future communication technologies, e.g., sixth generation (6 ^th generatin, 6G) mobile communication system. A system using the 5G radio access technology may be referred to as a 5G mobile communication system, and a system using the 4G radio access technology may be referred to as a 4G mobile communication system. In addition, RATs may also be referred to as a standard.

In the embodiments of the present application, the number of nouns, unless otherwise indicated, means "a singular noun or a plural noun", i.e. "one or more". "at least one" means one or more, and "a plurality" means two or more. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s).

In addition, it should be understood that in the description of the present application, the words "first," "second," and the like are used merely for distinguishing between the descriptions and not be construed as indicating or implying a relative importance or order.

Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Fig. 1 shows a structure of a mobile communication system to which the method provided by the embodiment of the present application is applicable. Referring to fig. 1, the mobile communication system includes: base station and terminal equipment.

The base station is an entity capable of receiving and transmitting wireless signals at the network side, and is responsible for providing wireless access related services for terminal equipment in the coverage area of the base station, so as to realize physical layer functions, resource scheduling and wireless resource management, quality of service (Quality of Service, qoS) management, wireless access control and mobility management functions. Through the base station, the terminal equipment can access the core network and finally connect to the data network to realize the service of the terminal equipment.

The terminal equipment is an entity capable of receiving and transmitting wireless signals at the user side and can access the network through a cell managed by the access base station. The terminal device may be a variety of devices that provide voice and/or data connectivity to the user, such as a vehicle-mounted device, a smart phone, etc. The terminal equipment is connected with the base station through a Uu interface to realize communication between the terminal equipment and the base station.

The base station provides access and communication services for the terminal equipment through the managed cells. For clarity and brevity, in the description of the embodiments of the present application, the function of the network side base station is denoted as the function of the cell. It should be understood that the operations and steps performed by a cell are described subsequently, in fact, as performed by a base station that manages the cell.

In a mobile communication system, each base station is responsible for managing at least one cell, and each cell provides communication services for terminal equipment by using corresponding frequency spectrum resources. As shown in fig. 1, base station a manages cell 1 and cell 2, and base station B manages cell 3. The base station A configures spectrum resources in the carrier 1 for the cell 1 and configures spectrum resources of the carrier 2 for the cell 2; base station B configures the spectrum resources in carrier 3 for cell 3.

The cell that is providing access and communication services for a terminal device is referred to as a serving cell of the terminal device, and cells adjacent to the location of the serving cell may be referred to as neighbor cells.

It should also be noted that the mobile communication system shown in fig. 1 is taken as an example, and is not limited to the mobile communication system configuration to which the method provided in the embodiment of the present application is applicable. In summary, the embodiments of the present application may also be applied to various types and systems of communication systems, such as: a 4G communication system, a 5G communication system, a sixth generation (The 6th Generation,6G) communication system, and other standards of communication systems evolving in The future, a long term evolution-internet of vehicles (LTE-V) system, and The like.

In order to facilitate understanding of the present application, the following description will be made with respect to the background art.

1. Cell camping:

when the terminal device selects a camping cell, the terminal device may conduct a cell search. When the target cell meets the residence condition, the terminal equipment can initiate residence of the target cell.

For example, a non-access stratum (NAS) layer of a terminal device may initiate a search for cells of a specified format (e.g., 5G) (which may also be referred to as a network search for a specified format). Specifically, the NAS layer of the terminal device sends information (for example, a specified public land mobile network (public land mobile network, PLMN) and/or a tracking area code (tracking area code, TAC)) required for camping to the access layer of the terminal device, and the access layer (for example, RRC layer) of the terminal device performs cell search according to the information required for camping, for example, searches for a target cell of a specified system corresponding to the PLMN and TAC. If the target cell satisfies the camping condition, the RRC layer of the terminal device may initiate camping on the target cell.

In the method, when the terminal equipment selects the residence cell, only whether the cell meets the residence condition is considered, and the power consumption of the terminal equipment connected to the cell is not considered, so that the standby power consumption after the terminal equipment resides in the selected cell may be higher.

2. Detection of paging messages:

after camping on the serving cell, the terminal device receives a system message from the serving cell, where the system message includes a discontinuous reception (discontinuous reception, DRX) cycle of the serving cell. The access layer of the terminal device may parse the DRX cycle and send the DRX cycle to the physical layer. The physical layer of the terminal device may then detect the paging message from the serving cell according to the DRX cycle. In other words, after camping on the serving cell and receiving the system message from the serving cell, the terminal device may detect the paging message of the serving cell according to the DRX cycle in the system message.

Some cells may be configured to send paging messages multiple times. For example, some cells may repeatedly send the same called paging message in consecutive multiple DRX cycles, and the terminal equipment receives one of the called paging messages, and can display the incoming call. Currently, even though the serving cell is a cell configured to transmit paging messages multiple times, the terminal device detects the paging messages using the DRX cycle, thereby increasing power consumption of the terminal device.

3. Cell reselection:

when the terminal equipment is in an idle state, after the terminal equipment resides in the service cell, the terminal equipment can continuously perform cell reselection by measuring the signal strength of the service cell and the adjacent cell so as to reside in a cell with higher priority or better channel quality. Wherein the neighbor cell may comprise at least one of: the method comprises the following steps of a same-frequency neighbor cell, a different-frequency neighbor cell and a different-system neighbor cell. The heterogeneous system neighbor cell is a cell using different RAT from the serving cell.

When the terminal equipment is stationary and in an idle state, if the signal strength of the serving cell of the terminal equipment exceeds a first set strength threshold, the terminal equipment does not have mobility requirements and does not need to reselect the cell. However, with the above method, in this case, the terminal device still needs to measure the signal strength of the neighboring cell, thereby increasing the power consumption of the terminal device.

4. Cell handover:

when the terminal equipment is in a connection state, the base station can send measurement configuration information to the terminal equipment through an RRC connection reconfiguration message. And the terminal equipment measures the signal strength of the service cell and the adjacent cell according to the measurement configuration information issued by the base station, and reports the measurement result. The base station may then decide whether to perform a handover based on the measurement.

When the terminal equipment is stationary and in a connection state, if the signal strength of the serving cell of the terminal equipment exceeds a second set strength threshold, the terminal equipment does not have mobility requirements and does not need to perform cell switching. However, when the above method is adopted, in this case, the terminal device still needs to measure the signal strengths of the serving cell and the neighboring cell and report the measurement report, thereby increasing the power consumption of the terminal device.

5. Release of RRC connection:

currently, release of the RRC connection is initiated by the base station. However, for uplink data, the base station does not know when the terminal device has transmitted the uplink data. In this way, after the data transmission between the terminal device and the base station is completed, the RRC connection cannot be released in time, thereby causing resource waste.

The scheme provided by the application is described below with reference to the accompanying drawings.

The embodiment of the application provides a communication method which can be applied to the communication system shown in fig. 1. The flow of the method will be described in detail with reference to the flowchart shown in fig. 2.

S201: the first terminal device enters a stationary mode.

In some possible manners, the application layer of the first terminal device may instruct the first terminal device to enter the stationary mode when it is determined that the first terminal device satisfies the condition of entering the stationary mode. For example, the application layer of the first terminal device may send an indication for instructing the first terminal device to enter the stationary mode to a protocol stack (Modem) of the first terminal device when it is determined that the first terminal device satisfies a condition for entering the stationary mode.

Optionally, the condition for entering the stationary mode may include at least one of:

Condition 1: the position of the first terminal equipment is unchanged in the third duration;

condition 2: the first terminal equipment does not detect the operation of the user on the first terminal equipment in the fourth time period;

condition 3: and in the fifth time period, the application programs in the first terminal equipment are in a closed or standby state.

The following describes how the application layer of the first terminal device determines that the first terminal device satisfies the conditions 1-3.

For condition 1:

the application layer of the first terminal device may obtain a preconfigured third duration or a third duration indicated by other communication devices (e.g., base station, etc.). The application layer of the first terminal device may acquire the location of the first terminal device through a location detection means (e.g., a global positioning system (global positioning system, GPS) locator) of the first terminal device; or by detecting whether the position of the first terminal device has changed by means of a motion sensor or the like. When the positions of the first terminal devices acquired by the application layer of the first terminal device are the same within the third duration, the application layer of the first terminal device can determine that the first terminal device meets the condition 1; otherwise, the application layer of the first terminal device may determine that the first terminal device does not satisfy the condition 1.

For condition 2:

the application layer of the first terminal device may obtain a preconfigured fourth time period or a fourth time period indicated by other communication devices (e.g., base stations, etc.). The application layer of the first terminal device may obtain the operation of the user on the first terminal device through an input/output device (for example, a touch screen, a control key such as a volume key) of the first terminal device. When the application layer of the first terminal device does not acquire that the user operates the first terminal device all the time within the fourth duration, the application layer of the first terminal device can determine that the first terminal device meets the condition 2; otherwise, the application layer of the first terminal device may determine that the first terminal device does not satisfy the condition 2.

For condition 3:

the application layer of the first terminal device may obtain a preconfigured fifth duration or a fifth duration indicated by other communication devices (e.g., base station, etc.). The application layer of the first terminal device may detect the working state of each application program in the first terminal device. When the application layer of the first terminal device detects that the application programs in the first terminal device are all in the closed or standby state in the fifth time period (in other words, the user of the first terminal device does not use the application programs in the first terminal device in the fifth time period), the application layer of the first terminal device may determine that the first terminal device satisfies the condition 3; otherwise, the application layer of the first terminal device may determine that the first terminal device does not satisfy the condition 3.

In other possible ways, the first terminal device may enter the stationary mode based on an indication of the user or other communication device. For example, the first terminal device may detect an instruction to enter the stationary mode entered by the user, thereby entering the stationary mode. As another example, the first terminal device is a paired device with the first communication device, one example being: the first terminal device is a mobile phone, and the first communication device is a watch. After the first communication device detects an instruction of entering the stationary mode, which is input by a user, the first communication device sends an instruction of entering the stationary mode to the first terminal device, so that the first terminal device enters the stationary mode.

S202: the first terminal device receives system information from at least one cell. Wherein, the system information from any one cell in at least one cell contains information for indicating the paging detection period of any cell.

For example, the first terminal device receives system information 1 from cell 1, and the system information 1 includes information indicating a paging detection period of cell 1. The first terminal device receives system information 2 from cell 2, the system information 2 containing information indicating a paging detection period of cell 2. The first terminal device may determine the paging detection period of the cell 1 and the paging detection period of the cell 2 through the system information 1 and the system information 2, respectively.

Alternatively, the information indicating the paging detection period of any cell may be directly the paging detection period of any cell (for example, the information indicating the paging detection period of any cell is 32 milliseconds (ms)), or may be indirectly the paging detection period of any cell (for example, when the information indicating the paging detection period of any cell is the first value, the paging detection period of any cell is 32 ms).

Wherein the paging detection period may be a DRX period.

S203: the first terminal device measures the signal strength of at least one cell.

Wherein the first terminal device may measure the signal strength of the at least one cell by measuring at least one of the following parameters: reference signal received power (reference signal receiving power, RSRP), reference signal received quality (reference signal receiving quality, RSRQ), received signal strength indication (received signal strength indication, RSSI), or signal to interference plus noise ratio (signal to interference plus noise ratio, SINR).

The present application is not limited to the execution order of S202 and S203. S202 may be performed first, and S203 may be performed second; s203 may be executed first, and S202 may be executed later; s202 and S203 may also be performed simultaneously.

S204: the first terminal equipment determines a candidate cell set according to the signal strength of at least one cell and the paging detection period.

Wherein the candidate set of cells may comprise: the signal intensity in at least one cell is larger than or equal to a first threshold value, and the cell with the largest paging detection period. For example, the at least one cell comprises: cell 1, cell 2 and cell 3. According to the system information received in S202, the first terminal device determines that the paging detection period of cell 1 is 32ms, the paging detection period of cell 2 is 64ms, and the paging detection period of cell 3 is 64ms. From the signal strengths measured in S203, the first terminal device determines that the signal strengths of cell 1, cell 2, and cell 3 are all greater than the first threshold. At this time, the first terminal device may determine that the candidate cell set includes: cell 2 and cell 3.

Optionally, in S204, the first terminal device may further determine and save a first set, where the first set includes cells with a signal strength greater than a first threshold value in the at least one cell. For example, the at least one cell comprises: cell 1, cell 2 and cell 3. From the signal strengths measured in S203, the first terminal device determines that the signal strengths of cell 1, cell 2, and cell 3 are all greater than the first threshold. At this time, the first terminal device may determine that the first set includes: cell 1, cell 2 and cell 3.

S205: the first terminal device camps on the first cell. Wherein the first cell is a cell in the candidate cell set.

By the method, when the first terminal equipment selects the resident cell, not only the signal strength of the cell but also the paging detection period of the cell are considered. By selecting a cell with signal strength greater than or equal to the first threshold and the largest paging detection period to camp on, the first terminal device can detect the paging message by at least adopting the largest paging detection period, thereby reducing standby power consumption of the first terminal device.

To further save power consumption, when a plurality of cells are included in the candidate cell set, the first terminal device may camp on a cell in the candidate cell set by one of the following implementations.

The implementation mode is as follows: the first terminal device camps on a cell (i.e., target cell) in the candidate set of cells that is configured to send multiple paging messages.

Wherein, the first implementation manner may include steps A1-A2:

a1: the first terminal device may detect whether a set of candidate cells includes cells configured to transmit a plurality of paging messages.

The first terminal device may detect, one by one, according to a set order, whether the candidate cell set includes a cell configured to transmit the paging message multiple times, or may detect, one by one, according to a random order, whether the candidate cell set includes a cell configured to transmit the paging message multiple times. When detecting that the candidate cell set includes a cell configured to transmit a plurality of paging messages, the first terminal device may stop detecting and continue camping on the cell.

Optionally, the order of setting is at least one of:

1. the cell system is from high to low: for example (hereinafter example one), when the candidate set of cells includes: in the case of cell a of 5G, cell B of third generation (3rd generatoin,3G), and cell C of 4G, the sequence is: cell a, cell C and cell B.

2. The power consumption of the first terminal equipment in each standard cell is from low to high: for example, the candidate set of cells includes: cell a of 5G, cell B of 3G, cell C of 4G, the power consumption of the first terminal device is the lowest in the 5G cell, the power consumption is the highest in the 4G cell; at this time, the sequence is: cell a, cell B and cell C. The power consumption of the first terminal equipment in each system cell can be automatically detected by the first terminal equipment; or may be detected and stored in the first terminal device prior to shipment.

Alternatively, step A1 may comprise steps B1-B2:

b1: the first terminal device detects whether a current serving cell (e.g., a first cell) is a cell configured to transmit a plurality of paging messages.

The current serving cell may be a cell selected by the first terminal device from the candidate cell set according to the set order or the random order. For example, for example one above, in step B1, the current serving cell may be cell a.

B2: when detecting that the current service cell is a cell configured to send paging messages for a plurality of times, the first terminal device can determine that the cell is a target cell; when detecting that the current serving cell is not a cell configured to transmit a plurality of paging messages, the first terminal device may camp on to a next cell in the candidate set of cells.

The manner in which the first terminal device detects whether the current serving cell is a cell configured to transmit the paging message multiple times may be referred to as the following description of step B1.

For each cell in the candidate set of cells, the first terminal device may perform B1-B2 until a cell configured to send a plurality of paging messages is detected or all cells in the candidate set of cells are detected.

For example, for the above example one, in B1, when it is detected that cell a is a cell configured to transmit a plurality of paging messages, the first terminal device may determine that cell a is a target cell; when it is detected that the cell a is not a cell configured to transmit the paging message multiple times, the first terminal device may camp on the cell C, and perform the steps B1-B2 with the cell C as a current serving cell until the cell configured to transmit the paging message multiple times is detected or all cells in the candidate cell set are detected.

The method provides a possible method for detecting whether the candidate cell set contains the cell configured to send the paging message for multiple times, and is easy to realize.

Optionally, in step B2, when the current serving cell is not detected as a cell configured to send a plurality of paging messages within the first duration, the first terminal device may camp on to a next cell in the candidate cell set. I.e. the first terminal device detects whether the current serving cell is a cell configured to send multiple paging messages for a time not exceeding the first duration. For example, the first terminal device may start a first timer with a first time duration after camping on the current serving cell; when the timing time of the first timer arrives, if the first terminal equipment still does not detect that the current service cell is a cell configured to send the paging message for multiple times, the first terminal equipment resides in the next cell in the candidate cell set.

The first duration may be preconfigured (for example, a non-volatile (NV) random access memory (random access memory, RAM) is configured with a detection timer duration T1, where T1 is the first duration), or may be acquired by the first terminal device from another communication device (for example, a base station).

By the method, the total duration of the first terminal equipment for detecting whether the candidate cell set contains the cell configured to send the paging message for many times can be limited, so that the first terminal equipment is prevented from always detecting whether the candidate cell set contains the cell configured to send the paging message for many times, and the time for the first terminal equipment to select the resident cell is reduced.

A possible implementation of step B1 is described below taking the current serving cell as the first cell as an example.

In step B1, the first terminal device may detect whether the first cell includes a cell configured to transmit a multi-page message by:

the first terminal device may detect the paging message from the first cell according to a paging detection period of the first cell. When M paging messages from the first cell are received in paging detection periods of consecutive M first cells and identification information of the second terminal device is included in each received paging message, in other words, when the first terminal device receives the same paging message from the first cell in each paging detection period of consecutive M first cells, the first terminal device may determine that the first cell is a cell configured to transmit paging messages multiple times; otherwise, the first terminal device may determine that the first cell is not a cell configured to transmit the paging message multiple times. Wherein M is an integer greater than or equal to 2.

Alternatively, the first terminal device may detect whether paging messages from the first cell are received in each of paging detection periods of consecutive M first cells, and each received paging message includes identification information of the second terminal device.

C1: after receiving the called page from the first cell, the first terminal device saves the UE identifier (UE-Identity) in the called page, and records the time when the called page is received (hereinafter referred to as the first time).

C2: the first terminal device calculates a time difference between the second time and the first time after receiving a next called page from the first cell at the second time. If the time difference is less than or equal to the time difference threshold (i.e., within the DRX error range), indicating that the two called pages are received in the paging detection periods of two consecutive first cells, step C3 may be performed; otherwise, step C1 is performed for the called page received in step C2, that is, the called page received in step C1 is replaced with the called page received in step C2.

And C3: the first terminal equipment judges whether the ue-Identity in the called paging received by the step C1 is the same as the ue-Identity in the next called paging received by the step C2; if so, the first terminal equipment can determine that the first cell is a cell configured to send the paging message for a plurality of times; otherwise, step C1 is performed for the called page received in step C2, that is, the called page received in step C1 is replaced with the called page received in step C2.

It should be understood that, for any cell (e.g., the second cell) in the candidate cell set, the first terminal device may detect whether the cell is a cell configured to transmit the paging message multiple times by the above method, and simply replace the first cell therein with the second cell.

By the method, for any cell, the first terminal equipment can determine whether the cell is configured to send the paging message for multiple times by detecting the paging message, so that the operation is simpler.

Alternatively, the third cell may be any cell in the candidate cell set, and the first terminal device may detect, according to the second period, whether the third cell is a cell configured to transmit the multiple paging message, that is, the first terminal device may detect, using the second period, whether the third cell is a cell configured to transmit the multiple paging message. For example, in the kth second period, the first terminal device detects whether the third cell is a cell configured to send the paging message multiple times, and the detection method may refer to step B1; when the first terminal device does not detect that the third cell is a cell configured to transmit the paging message multiple times, the first terminal device may detect whether the third cell is a cell configured to transmit the paging message multiple times in the (k+1) th second period. Wherein K is a positive integer.

The second period may be greater than the paging detection period of the third cell, for example, the second period is 5 minutes and the paging detection period of the third cell is 64ms.

In addition, the second period may be preconfigured, or may be acquired by the first terminal device from another communication device (for example, a base station).

In practical applications, a cell may be a cell configured to send paging messages multiple times; however, when the first terminal device detects whether the cell is a cell configured to transmit a plurality of paging messages, the cell may not transmit a paging message, and thus the first terminal device may not detect that the cell is a cell configured to transmit a plurality of paging messages. By periodically detecting whether the cell is a cell configured to transmit the paging message multiple times through the second period, the accuracy of detecting whether the cell is a cell configured to transmit the paging message multiple times can be improved.

A2: when detecting that the candidate cell set includes a cell configured to transmit the multiple paging message, the first terminal device may stop detecting and continue camping on the cell configured to transmit the multiple paging message (i.e., the target cell).

Since the first terminal device has already been camped on the target cell when detecting whether the target cell is a cell configured to transmit a plurality of paging messages, the first terminal device does not perform operations such as cell handover.

In this implementation one, the first terminal device may camp on a target cell in the candidate cell set configured to send the paging message multiple times. When the first terminal device is in the stationary mode and resides in a cell configured to transmit paging messages multiple times, the first terminal device may further lengthen the period of detecting the paging messages, thereby further reducing the power consumption of the first terminal device.

The implementation mode II is as follows: the first terminal equipment resides in a cell with the highest standard (i.e., a first cell) in the candidate cell set.

For example, the candidate set of cells includes: cell a of 5G, cell B of 3G, cell C of 4G. The first terminal device may camp into cell a (i.e., the first cell).

And the implementation mode is three: the first terminal device randomly camps on one cell (i.e. the first cell) in the set of candidate cells.

For example, the candidate set of cells includes: cell a of 5G, cell B of 3G, cell C of 4G. The first terminal device may randomly select any one of cell a, cell B, and cell C as the first cell and camp on the first cell.

The implementation mode is four: the first terminal device resides in a cell of the system with the lowest power consumption of the first terminal device in the candidate cell set (i.e. the first cell).

For example, the candidate set of cells includes: cell a of 5G, cell B of 3G, cell C of 4G, the power consumption of the first terminal device is the lowest in the 5G cell and the highest in the 4G cell. The first terminal device may camp into cell a (i.e., the first cell).

Optionally, after determining the candidate cell set through S204, the first terminal device may camp on the first cell in any of implementation two, implementation three, and implementation four; it is also possible to re-camp on the first cell when it is detected that none of the cells in the candidate cell set is a cell configured to send a paging message multiple times (the specific manner of detection may refer to implementation one), e.g. the first terminal device camps on the first cell by any of implementation two, implementation three, and implementation four.

Optionally, in some possible implementations of the embodiment of the present application, after step S205, the method further includes:

s206: when the current serving cell (e.g., target cell) is a cell configured to transmit a paging message multiple times, the first terminal device may receive the paging message from the current serving cell according to the first period. The first period is N times of the paging detection period of the current serving cell, and N is an integer greater than or equal to 2.

Wherein the first terminal device may adjust a period for receiving the paging message of the current serving cell only once; the period for receiving the paging message of the current serving cell may also be adjusted a plurality of times such that the period for receiving the paging message of the current serving cell becomes gradually longer. The following describes how the first terminal device adjusts the period for receiving the paging message of the current serving cell a plurality of times.

After the first terminal device detects that the current serving cell is a cell configured to send paging messages for multiple times through the step A1, the paging messages from the current serving cell may be received according to the first period 1. The first period 1 is N1 times of the paging detection period of the current serving cell, and N1 is an integer greater than or equal to 2. The first terminal device uses the first period 1 to detect whether the current serving cell is a cell configured to send paging messages multiple times, and the detection mode can refer to the step A1, and only the paging detection period of the first cell is replaced by the first period 1. When the first terminal device detects that the current serving cell is a cell configured to send paging messages for multiple times by using the first period 1, the first terminal device may receive the paging messages from the current serving cell according to the first period 2, where the first period 2 is N2 times of the paging detection period of the current serving cell, N2 is an integer greater than or equal to 2, and N2 is greater than N1. Alternatively, the first terminal device may use the first period 2 to detect whether the current serving cell is a cell configured to transmit the paging message multiple times, until the period for receiving the paging message of the current serving cell reaches the third threshold. The third threshold may be preset or acquired from another communication device (e.g., a base station).

In addition, the first terminal device may multiplex the result of step A1 to determine that the current serving cell is a cell configured to transmit the paging message multiple times; the method in implementation one may also be referred to as determining that the current serving cell is a cell configured to transmit the paging message multiple times after camping on the current serving cell and/or after receiving a message from the current serving cell indicating a system message update.

Since the current serving cell is a cell configured to transmit paging messages multiple times, the current serving cell may transmit the same paging message during a paging detection period of consecutive multiple current serving cells. When the first terminal equipment is in the static mode, the corresponding operation can be carried out only by receiving one paging message from the current service cell. For example, when the first terminal device is in the stationary mode, the incoming call information can be displayed as long as a called page from the current serving cell is received. By the method, when the current service cell is the cell configured to send the paging message for multiple times, the first terminal equipment receives the paging message from the current service cell according to the multiple of the paging detection period of the current service cell, but not each paging period receives the paging message from the current service cell, so that the power consumption of the first terminal equipment can be reduced.

s207: the first terminal device detects only the signal strength of the current serving cell (e.g., the first cell or the target cell). In other words, the first terminal device detects the signal strength of the serving cell in the stationary mode, and does not detect the signal strength of the neighbor cell.

The signal strength parameter may refer to S203, which is not described herein.

In the stationary mode, the first terminal device has no mobility requirement and does not need to perform cell reselection or cell handover. By the method, in the static mode, the first terminal equipment only detects the signal intensity of the service cell and does not detect the signal intensity of the adjacent cell, so that the power consumption of the first terminal equipment can be reduced.

Further, when S207 is combined with S201-S205, the candidate cell set in S204 may be: a set of cells in the at least one cell having a signal strength greater than or equal to a first threshold is included. At this time, in the stationary mode, the first terminal device only detects the signal strength of the serving cell, and does not detect the signal strength of the neighboring cell, so that the power consumption of the first terminal device can be reduced.

In addition, the execution order of S206 and S207 is not limited in the present application.

Optionally, in some possible implementations of the embodiments of the present application, S207 may include the following steps D1-D2:

d1: the first terminal device detects the signal strength of the current serving cell (e.g., the target cell or the first cell) using the third period.

Wherein the third period may be a period for detecting a cell signal strength determined by a physical layer of the first terminal device.

D2: when the signal strengths of the current serving cell in the second duration are all greater than or equal to the second threshold, the first terminal device may detect the signal strength of the current serving cell using a fourth period greater than the third period.

The second duration and/or the second threshold may be preconfigured, or the first terminal device may be acquired from another device (e.g., a base station).

Optionally, when the signal strengths of the current serving cells in the second duration are all greater than or equal to the second threshold, the physical layer of the first terminal device may redetermine a period for detecting the signal strengths of the cells (i.e., a fourth period), where the fourth period is greater than the third period.

According to the method, when the first terminal equipment detects that the signal intensity of the current service cell in the second duration is continuously greater than or equal to the second threshold value, the first terminal equipment can adopt a larger period to detect the signal intensity of the current service cell, so that the time interval for detecting the signal intensity of the current service cell is prolonged; in this way, the time for the first terminal device to stop detecting the signal strength of the current serving cell is also longer, so that the power consumption of the first terminal device can be reduced.

Alternatively, in some possible implementations of the embodiments of the present application, when the first terminal device is in the RRC connected state, after S205, the first terminal device may prevent reporting of the measurement report.

In the stationary mode, the first terminal device has no mobility requirement; in this way, cell handover is not required even if the first terminal device is in RRC connected state. By the method, the first terminal equipment does not report the measurement report in the static mode, so that the power consumption of the first terminal equipment can be reduced, and resources for transmitting the measurement report can be saved. And the first terminal equipment does not report the measurement report, and unnecessary triggering of the base station to initiate cell switching can also be avoided.

Alternatively, in some possible implementations of the embodiments of the present application, after S205, the first terminal device may perform the operation after exiting the stationary mode by one of the following implementations.

Implementation 1: after exiting the stationary mode, the first terminal device changes camping cell.

The implementation 1 may include steps E1-E2:

e1: the first terminal device exits the stationary mode.

In some possible manners, the application layer of the first terminal device may instruct the first terminal device to exit the stationary mode when it is determined that the first terminal device satisfies a condition for exiting the stationary mode. For example, the application layer of the first terminal device may send an indication for instructing the first terminal device to exit the stationary mode to the protocol stack of the first terminal device when it is determined that the first terminal device satisfies the condition for exiting the stationary mode.

Optionally, the condition for exiting the stationary mode may include at least one of:

condition one: in the sixth time period, the position of the first terminal device is changed;

condition II: in a seventh time period, the first terminal equipment detects the operation of a user on the first terminal equipment;

and (3) a third condition: and in the eighth time period, one or more application programs in the first terminal equipment are in an operating state.

The following describes how the application layer of the first terminal device determines that the first terminal device satisfies the condition one-condition three.

For condition one:

the application layer of the first terminal device may obtain a preconfigured sixth duration or a sixth duration indicated by other communication devices (e.g., base station, etc.). The application layer of the first terminal device may acquire the location of the first terminal device through a location detection means (e.g., a GPS locator) of the first terminal device. When the position of the first terminal device acquired by the application layer of the first terminal device changes within the sixth duration, the application layer of the first terminal device can determine that the first terminal device meets a first condition; otherwise, the application layer of the first terminal device may determine that the first terminal device does not satisfy the condition one.

For condition two:

The application layer of the first terminal device may obtain a preconfigured seventh duration or a seventh duration indicated by other communication devices (e.g., base station, etc.). The application layer of the first terminal device may obtain the operation of the user on the first terminal device through an input/output device (for example, a touch screen, a control key such as a volume key) of the first terminal device. When the application layer of the first terminal device obtains an operation performed by the user on the first terminal device (for example, the application layer of the first terminal device obtains an operation of improving the volume of the user through a volume key of the first terminal device) in the seventh duration, the application layer of the first terminal device may determine that the first terminal device meets a second condition; otherwise, the application layer of the first terminal device may determine that the first terminal device does not satisfy the second condition.

For condition three:

the application layer of the first terminal device may obtain a preconfigured eighth duration or an eighth duration indicated by other communication devices (e.g., base station, etc.). The application layer of the first terminal device may detect the working state of each application program in the first terminal device. When the application layer of the first terminal device detects that one or more application programs in the first terminal device are in a working state within the eighth duration, the application layer of the first terminal device can determine that the first terminal device meets a third condition; otherwise, the application layer of the first terminal device may determine that the first terminal device does not satisfy the third condition.

In other possible ways, the first terminal device may exit the stationary mode based on an indication of the user or other communication device. For example, the first terminal device may detect an instruction to exit the stationary mode entered by the user, thereby exiting the stationary mode. As another example, the first terminal device is a paired device with the first communication device, one example being: the first terminal device is a mobile phone, and the first communication device is a watch. After the first communication device detects an instruction of exiting the stationary mode input by a user, an instruction of exiting the stationary mode is sent to the first terminal device, so that the first terminal device exits the stationary mode.

E2: the first terminal device resides in the fourth cell with the highest system in the first set stored in S204.

For example, the first set may include: cell a of 5G, cell B of 3G, cell C of 4G; the cell in which the first terminal device resides before exiting the stationary mode is cell C. In step E2, the first terminal device may camp on cell a (i.e. a fourth cell).

In S204, the first terminal device may save the first set; in this way, in the present implementation 1, after exiting the stationary mode, the first terminal device may quickly camp on the fourth cell with the highest system in the first set, without having to re-measure the cells, so as to reduce the time for changing the camping cell (which may also be referred to as cell reselection).

Implementation 2: after exiting the stationary mode, the first terminal device does not change camping cells.

The implementation 2 may include steps F1-F2:

f1: the first terminal device exits the stationary mode.

For details of F1, reference may be made to E1, and details thereof are not repeated here.

F2: the first terminal device receives the paging message from the current serving cell according to the paging detection period of the current serving cell (e.g., the target cell or the first cell), i.e., the first terminal device receives the paging message from the current serving cell using the paging detection period of the current serving cell.

After the first terminal device exits the stationary mode, if the paging message from the current serving cell is also received according to a multiple of the paging detection period of the current serving cell, it is possible that the paging message from the current serving cell is not received due to the movement of the first terminal device. In this implementation 2, after exiting the stationary mode, the first terminal device receives the paging message from the current serving cell using the paging detection period of the current serving cell, so that the likelihood that the first terminal device receives the paging message from the current serving cell may be improved.

Optionally, in some possible implementations of the embodiments of the present application, the method further includes:

g1: when the first terminal device is in an RRC connected state and it is detected that the first terminal device does not have uplink data and downlink data, the first terminal device releases the RRC connection between the first terminal device and the current serving cell (e.g., the target cell or the first cell).

In some possible manners, in a first set period of time after the first terminal device sends the uplink data to the current serving cell, if the first terminal device does not receive the downlink data from the current serving cell, the first terminal device may determine that the first terminal device does not have the uplink data and the downlink data. At this time, the first terminal device may release the RRC connection between the first terminal device and the current serving cell. The first set duration may be preconfigured, or may be acquired by the first terminal device from another communication device (for example, a base station).

In other possible manners, when the first terminal device does not receive the downlink data from the current serving cell within the second set duration, and the first terminal device also does not need to send the uplink data, the first terminal device may determine that the first terminal device does not have the uplink data and the downlink data. At this time, the first terminal device may release the RRC connection between the first terminal device and the current serving cell. The second set duration may be preconfigured, or may be acquired by the first terminal device from another communication device (for example, a base station).

By the method, the first terminal equipment can actively initiate the release of the RRC connection between the first terminal equipment and the current service cell.

The embodiment of the application provides a communication method. This method shows one possible example of the method shown in fig. 2. The method will be described with reference to the flowchart shown in fig. 3, taking a terminal device as an example of UE.

S301: an Application (AP) layer of the UE may inform a protocol stack (Modem) of the UE to enter a stationary mode after determining that the UE satisfies a condition to enter the stationary mode.

The method for determining, by the AP layer of the UE, that the UE satisfies the condition of entering the stationary mode may refer to S201, which is not described herein.

When the UE is not camping on any cell, S302-S304 may be performed first, followed by S305, after S301; when the UE has camped to the serving cell, S305 may be performed after S301.

S302: the NAS layer of the UE may initiate measurements (i.e., initiate a network search) of cells of a first format (e.g., 5G).

The first format may be a format specified by the NAS layer.

S303: the RRC layer of the UE may measure the signal strength of the cell of the first format, and when the signal strength of the cell of the first format is greater than or equal to a first threshold, the RRC layer of the UE may initiate camping on the cell. After the UE resides in the cell, the cell is the current serving cell of the UE.

Wherein the first threshold may be an NV customized energy threshold.

The contents of S302-S303 are referred to the above description of "cell camping", and will not be repeated here.

S304: the RRC layer of the UE acquires a paging detection period (e.g., DRX period) of the serving cell.

Specifically, the RRC layer of the UE may receive system information from the serving cell, and the system information may include a DRX cycle of the serving cell.

S305: the UE determines a first set of candidate cells.

Wherein the first set of candidate cells comprises: the signal strength in the neighbor cells of each system that can serve the UE exceeds a first threshold, and the DRX cycle is longest.

For example (hereinafter referred to as example 1), the serving cell of the UE is cell one of 5G, and the neighbor cells include: cell two of 3G, cell three of 4G, cell four of 5G, and cell five of 5G. The signal intensities of the cell two, the cell three, the cell four and the cell five are all larger than or equal to a first threshold value. The DRX period of cell two is 32ms, the DRX period of cell three is 64ms, the DRX period of cell four is 64ms, and the DRX period of cell five is 32ms. At this point, the UE may determine that the first set of candidate cells includes: cell three of 4G and cell four of 5G.

The method for the UE to measure the signal strength of the cell and determine the DRX cycle may refer to S202-S204, which will not be described herein.

S306: the UE determines a second set of candidate cells (i.e., the set of candidate cells in the method shown in fig. 2).

The UE may rank the cells in the first candidate cell set and the serving cell according to the DRX cycle, to obtain a second candidate cell set. The second set of candidate cells includes: the signal strength in the cell of each system capable of serving the UE is greater than or equal to the first threshold, and the cell with the longest DRX cycle. Optionally, for any system, when the signal strength is greater than or equal to the first threshold, and the number of cells with the longest DRX cycle is multiple, the UE may randomly select one cell from the multiple cells as a cell in the second candidate cell set; the current serving cell may also be selected as a cell in the second set of candidate cells; the cell in which the signal strength is greatest may also be selected as the cell in the second set of candidate cells.

For example, on the basis of example 1, when the DRX cycle of cell one is greater than 64ms, the second candidate cell set includes cell one; alternatively, when the DRX period of cell one is less than 64ms, the second candidate set of cells includes cell three of 4G and cell four of 5G; alternatively, when the DRX period of cell one is equal to 64ms, the second candidate cell set includes cell three of 4G and cell four of 5G, or includes cell three of 4G and cell one of 5G.

In addition, the UE may also save the first set of candidate cells or all cells with signal strengths greater than or equal to the first threshold.

S307: the UE judges whether the second candidate cell set contains the current service cell or not; if yes, then S309 is performed; otherwise, S308 is performed.

S308: and the UE reselects to the cell with the mode with the minimum standby power consumption of the UE in the second candidate cell set. In other words, the UE camps on the cell with the smallest standby power consumption of the UE in the second candidate cell set. At this time, the cell with the smallest standby power consumption of the UE is the current serving cell of the UE.

After S308, the UE may perform S310.

S309: the UE judges whether the second candidate cell set only contains the current service cell; if yes, then S312 is performed; otherwise, S310 is performed.

S310: the UE detects whether a second set of candidate cells includes cells configured to transmit a plurality of paging messages. If yes, then S313 is performed; otherwise, S311 is performed.

The UE may refer to step A1 in the method shown in fig. 2 for detecting whether the second candidate cell set includes a cell configured to send the paging message multiple times, which is not described herein.

S311: the UE camps on a cell in the second set of candidate cells.

The cell may be any cell in the second candidate cell set, or may be a cell in a system with the minimum standby power consumption of the UE in the second candidate cell set, or may be a cell with the maximum signal strength in the second candidate cell set, or may be a cell with the highest system in the second candidate cell set.

S312: the UE detects whether the current service cell is a cell configured to send paging messages for a plurality of times; if so, S313 is performed.

The specific content of S312 may refer to step A1 in the method shown in fig. 2, which is not described herein.

Alternatively, the UE may perform S312 after camping on the current serving cell.

In addition, if the UE does not detect that the current serving cell is a cell configured to transmit the paging message multiple times in S312, the RRC layer of the UE may periodically detect whether the current serving cell is a cell configured to transmit the paging message multiple times, i.e., periodically perform S312. For example, the RRC layer of the UE may set a second timer, the timing time of which is a second period. After the last execution of S312, if the current serving cell is not detected as a cell configured to send a plurality of paging messages, the RRC layer of the UE may start a second timer; when the timing time of the second timer arrives, the UE may perform S312 again.

S313: the RRC layer of the UE configures a first period for detecting a paging message for a Physical (PHY) layer of the UE. Wherein the first period may be a multiple of a DRX cycle (e.g., 2 x DRX cycle). The PHY layer of the UE may detect the paging message using the first period.

S314: the UE receives information from the base station indicating the update of the system message.

Wherein S314 is an optional step.

Optionally, after receiving information indicating a system message update from the base station, the UE performs S312.

Optionally, after S301, the UE may optimize the operation of the idle state and the connected state by the method shown in fig. 4.

Operation in the idle state after the UE enters the stationary mode is described below with reference to S401-S403.

S401: the UE only measures the signal strength of the serving cell.

The specific content of S401 may refer to S207, and the repetition is not repeated.

In addition, the UE may also detect the signal strength of the serving cell in the detection duration T using the third period. The third period is a period in which the UE measures the signal strength of the serving cell, and the period may also be referred to as a measurement stop interval duration interval. The detection duration T and the third period may be stored in advance in the NV RAM.

S402: the UE determines whether the signal strength of the serving cell is always greater than or equal to the second threshold value in the detection period T.

Wherein the UE may obtain a second threshold stored in NV. When the signal strengths of the serving cells measured using the third period are all greater than or equal to the second threshold in the detection period T, S403 is performed; otherwise, S401 is continued.

S403: the UE may adjust a period of measuring the signal strength of the serving cell. Specifically, the UE may adjust the period of measuring the signal strength of the serving cell from the third period to the fourth period.

Wherein the fourth period may be greater than the third period. Alternatively, the difference between the fourth period and the third period may be a multiple of the interval timer. For example, the third period is an interval timer, and the fourth period is 2×interval timer. Thus, when the signal strength of the serving cell of the UE continues to be greater than the second threshold, the UE increases the period for measuring the signal strength of the serving cell in units of an interval timer; in other words, the UE expands the time interval for stopping measuring the signal strength of the serving cell in units of the inter-value timer.

Operation in the connected state after the UE enters the stationary mode is described below with reference to S404-S406.

S404: the UE receives a measurement configuration of a connection state from the base station.

The measurement configuration may include, but is not limited to: measurement period, measurement window length, offset of measurement window within measurement period.

Alternatively, the measurement configuration may be carried in an existing message (e.g., RRC connection reconfiguration message) or may be carried in a new message, which is not limited by the present application.

S405: the UE only measures the signal strength of the serving cell and does not report measurement reports.

The specific content of the UE only measuring the signal strength of the serving cell can refer to S207 and S401-S403, and the repetition is not repeated.

Optionally, when the measurement configuration includes a measurement period, a measurement window length, an offset of the measurement window within the measurement period, the UE may measure the signal strength of the serving cell within the measurement window indicated by the measurement configuration.

S406: when it is determined that the UE has no uplink data and no downlink data, the UE may actively release the RRC connection between the UE and the serving cell.

The specific content of S406 may refer to step G1, and the repetition is not repeated.

Optionally, the underlying layer (e.g., physical layer and/or data link layer) of the UE may notify the RRC layer of the UE to actively release the RRC connection between the UE and the serving cell upon determining that the UE has no uplink data and no downlink data.

In addition, after releasing the RRC connection, the UE may enter an idle state and camp on a serving cell. At this time, the UE may perform operations of S401 to S403.

It should be understood that S401-S403 and S404-S406 may be combined with each other or may be separately used as a solution.

In addition, the present application is not limited in the order of execution of S401-S403 and S404-S406; the execution order of any step between S401 to S406 and S305 to S314 is not limited in the present application.

Alternatively, after S301, the UE may perform an operation after exiting the stationary mode through the methods shown in S315 to S316.

S315: the AP layer of the UE may notify the Modem of the UE to exit the stationary mode after determining that the UE satisfies the condition to exit the stationary mode.

The specific content of determining, by the AP layer of the UE, whether the UE satisfies the condition of exiting the stationary mode may refer to step E1, which is not described herein.

S316: after the UE exits the stationary mode, at least one of the following operations may be performed:

1. the UE camps on the cell with the highest standard among the cells stored in S306. For details, reference may be made to step E2, which is not described here.

2. The UE configures a period for detecting paging information for the PHY layer according to the DRX period of the current serving cell; the PHY layer of the UE receives the paging message using the DRX cycle of the current serving cell. For details, reference may be made to step F2, which is not described here.

3. The UE resumes measuring the signal strengths of the serving cell and the neighbor cells. Wherein the neighbor cell may comprise at least one of: the method comprises the following steps of a same-frequency neighbor cell, a different-frequency neighbor cell and a different-system neighbor cell.

4. The UE cancels the suppression of the measurement report; in other words, the UE may report a measurement report while in a connected state.

In the present application, S315-S316 may be combined with at least one of S401-S403, S404-S406, and S305-S314. At the time of the combination, at least one of S401 to S403, S404 to S406, and S305 to S314 is performed first, and then S315 to S316 are performed.

In addition, the following steps may be performed by the RRC layer of the UE: S305-S307, S309-S310, S312, S402; the following steps may be performed by the RRC layer and PHY layer of the UE: s308, S311, S314, S316, S401, S403-S406.

By the method, when the UE selects the resident cell, not only the signal strength of the cell but also the paging detection period of the cell are considered. Specifically, the UE selects a cell with a signal strength greater than or equal to a first threshold and a maximum paging detection period to camp on; thus, the UE can detect the paging message by adopting at least the maximum paging detection period, thereby reducing the standby power consumption of the UE.

In addition, in the method, when the UE is in the static mode and is resided in a cell configured to transmit the paging message for a plurality of times in the second candidate cell set, the UE can lengthen the period for detecting the paging message, so that the power consumption of the UE can be further reduced.

In addition, in the method, in the stationary mode, the UE only detects the signal strength of the serving cell and does not detect the signal strength of the neighbor cell, so that the power consumption of the UE can be reduced.

In addition, by the method, when the UE detects that the signal intensity of the serving cell is continuously greater than or equal to the second threshold value, the UE can adopt a larger period to detect the signal intensity of the serving cell, and the time interval for detecting the signal intensity of the serving cell is prolonged, so that the power consumption of the UE can be reduced.

In addition, through the method, the UE can timely release the RRC connection between the UE and the serving cell when no uplink data and no downlink data are found, so that unnecessary occupation of resources is avoided.

Based on the same inventive concept as the method embodiments of fig. 2 to 4, an embodiment of the present application provides a communication device through fig. 5, which can be used to perform the functions of the relevant steps in the above-described method embodiments. The functions may be implemented by hardware, or may be implemented by software or hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. The communication device has a structure as shown in fig. 5, and includes a communication unit 501 and a processing unit 502. The communication apparatus 500 may be applied to a terminal device in the communication system shown in fig. 1, and may implement the communication method provided in the embodiments and examples of the present application. The functions of the respective units in the communication apparatus 500 are described below.

The communication unit 501 is configured to receive and transmit data, and may be implemented by a transceiver, for example, a mobile communication module. The mobile communication module may include at least one antenna, at least one filter, a switch, a power amplifier, a low noise amplifier (low noise amplifier, LNA), etc. The AN device can communicate with the accessed terminal device through the mobile communication module.

The processing unit 502 may be configured to support the communication device 500 to perform the processing actions in the method embodiments described above. The processing unit 502 may be implemented by a processor. For example, the processor may be a central processing unit (central processing unit, CPU), but may also be other general purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), field programmable gate arrays (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general purpose processor may be a microprocessor, but in the alternative, it may be any conventional processor.

In an implementation manner, the communication apparatus 500 is applied to the first terminal device in the embodiment of the present application shown in fig. 2, or the UE in the embodiment of the present application shown in any one of fig. 3 to fig. 4. Specific functions of the communication unit 501 and the processing unit 502 in this embodiment are described below.

A communication unit 501 for receiving system information from at least one cell when the communication apparatus 500 enters a stationary mode; wherein the system information from the at least one cell includes information indicating a paging detection period of any one of the at least one cell;

a processing unit 502, configured to: measuring signal strength of at least one cell; determining a candidate cell set according to the paging detection period and the signal strength of at least one cell, wherein the candidate cell set comprises: the signal intensity in at least one cell is larger than or equal to a first threshold value, and the cell with the largest paging detection period; and camping to a first cell, wherein the first cell is a cell in the candidate cell set.

Optionally, the processing unit 502 is further configured to: after residing to the first cell, detecting whether the residing first cell is a cell configured to send a plurality of paging messages; when the first cell is not configured to send the paging message for multiple times, the cell is resided in the next cell in the candidate cell set and whether the cell is configured to send the paging message for multiple times is detected; and camping to a target cell, wherein the target cell is a cell configured in the candidate cell set to send a plurality of paging messages.

Optionally, the processing unit 502 is specifically configured to: when M paging messages from the first cells are received through the communication unit 501 in paging detection periods of M consecutive first cells and each received paging message contains identification information of the second terminal device, determining the first cell as a cell configured to transmit paging messages for multiple times; when M paging messages from the first cells are not received through the communication unit 501 in the paging detection periods of consecutive M first cells, it is determined that the first cells are not cells configured to transmit paging messages multiple times; wherein M is an integer greater than or equal to 2.

Optionally, the communication unit 501 is further configured to: after camping on the target cell, receiving a paging message from the target cell according to the first period; the first period is N times of the paging detection period of the target cell, and N is an integer greater than or equal to 2.

Optionally, the processing unit 502 is specifically configured to: when the candidate cell set does not include a cell configured to transmit a plurality of paging messages, re-camping to the first cell.

Optionally, the processing unit 502 is further configured to: after camping on the target cell, only the signal strength of the target cell is detected.

Optionally, the processing unit 502 is further configured to: when the communication device 500 is in the radio resource control RRC connected state, reporting of measurement reports is prevented after detecting the signal strength of the target cell.

Optionally, the processing unit 502 is further configured to: before camping on a first cell, determining a first set according to signal strength of at least one cell, wherein the first set comprises: a cell in which the signal strength in the at least one cell is greater than or equal to a first threshold; after camping on the first cell, when the communication device 500 exits the stationary mode, camping on a fourth cell with the highest system in the first set.

Optionally, the communication unit 501 is further configured to: when the communication device 500 exits the stationary mode after camping on the target cell, a paging message from the target cell is received according to the paging detection period of the target cell.

Optionally, the processing unit 502 is further configured to: after camping on the target cell, when the communication device 500 is in the RRC connected state and no uplink and downlink data of the communication device 500 is detected, the RRC connection between the communication device 500 and the target cell is released.

It should be noted that, in the above embodiments of the present application, the division of the modules is merely schematic, and there may be another division manner in actual implementation, and in addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or may exist separately and physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

Based on the same technical concept, the embodiment of the present application provides a communication device through the illustration of fig. 6, which can be used to perform the steps related to the above-mentioned method embodiment. The communication device can be applied to the terminal equipment in the communication system shown in fig. 1, and can implement the communication method provided by the embodiment and the example of the present application, and has the function of the communication device shown in fig. 5. Referring to fig. 6, the communication device 600 includes: a communication module 601, a processor 602 and a memory 603. Wherein the communication module 601, the processor 602, and the memory 603 are connected to each other.

Optionally, the communication module 601, the processor 602, and the memory 603 are connected to each other through a bus 604. The bus 604 may be a peripheral component interconnect standard (peripheral component interconnect, PCI) bus or an extended industry standard architecture (extended industry standard architecture, EISA) bus, among others. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in fig. 6, but not only one bus or one type of bus.

The communication module 601 is configured to receive and send data, and implement communication interaction with other devices. For example, the communication module 601 may be implemented by a physical interface, a communication module, a communication interface, and an input/output interface.

The processor 602 may be used to support the communication device 600 to perform the processing actions described above in the method embodiments. The processor 602 may also be adapted to carry out the functions of the processing unit 502 described above, when the communication device 600 is adapted to carry out the above-described method embodiments. The processor 602 may be a CPU, but may also be other general purpose processors, DSP, ASIC, FPGA or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general purpose processor may be a microprocessor, but in the alternative, it may be any conventional processor.

In an implementation manner, the communication apparatus 600 is applied to the first terminal device in the embodiment of the present application shown in fig. 2, or the UE in the embodiment of the present application shown in any one of fig. 3 to fig. 4. The processor 602 is specifically configured to:

when the first terminal device enters a stationary mode, receiving system information from at least one cell through the communication module 601; wherein the system information from the at least one cell includes information indicating a paging detection period of any one of the at least one cell; measuring signal strength of at least one cell; determining a candidate cell set according to the paging detection period and the signal strength of at least one cell; wherein the candidate cell set includes: the signal intensity in at least one cell is larger than or equal to a first threshold value, and the cell with the largest paging detection period; camping to a first cell; wherein the first cell is a cell in the candidate cell set.

The specific function of the processor 602 may refer to the description of the communication method provided in the above embodiments and examples of the present application, and the specific function description of the communication device 500 in the embodiment of the present application shown in fig. 5 is not repeated herein.

The memory 603 is used for storing program instructions, data, etc. In particular, the program instructions may comprise program code comprising computer-operating instructions. The memory 603 may comprise RAM, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory. The processor 602 executes the program instructions stored in the memory 603, and uses the data stored in the memory 603 to implement the above functions, thereby implementing the communication method provided in the above embodiment of the present application.

It will be appreciated that the memory 603 in FIG. 6 of the present application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile memory may be a ROM, a Programmable ROM (PROM), an Erasable Programmable EPROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be RAM, which acts as external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Based on the above embodiments, the present application also provides a computer program, which when run on a computer causes the computer to perform the method provided by the above embodiments.

Based on the above embodiments, the present application also provides a computer-readable storage medium having stored therein a computer program which, when executed by a computer, causes the computer to perform the method provided in the above embodiments.

Wherein a storage medium may be any available medium that can be accessed by a computer. Taking this as an example but not limited to: the computer readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

Based on the above embodiments, the present application further provides a chip, where the chip is configured to read a computer program stored in a memory, and implement the method provided in the above embodiments.

Based on the above embodiments, the embodiments of the present application provide a chip system, which includes a processor for supporting a computer apparatus to implement the functions related to each device in the above embodiments. In one possible design, the chip system further includes a memory for storing programs and data necessary for the computer device. The chip system can be composed of chips, and can also comprise chips and other discrete devices.

In various embodiments of the application, where no special description or logic conflict exists, terms and/or descriptions between the various embodiments are consistent and may reference each other, and features of the various embodiments may be combined to form new embodiments based on their inherent logic.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented 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 apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A communication method applied to a first terminal device, comprising:

when the first terminal equipment enters a static mode, receiving system information from at least one cell; wherein the system information from the at least one cell includes information for indicating a paging detection period of any one of the at least one cell;

measuring a signal strength of the at least one cell;

determining a candidate cell set according to the paging detection period and the signal strength of the at least one cell; wherein the candidate cell set includes: the signal intensity in the at least one cell is larger than or equal to a first threshold value, and the cell with the largest paging detection period is provided;

camping to a first cell; wherein the first cell is a cell in the candidate cell set.

2. The method of claim 1, wherein after camping on the first cell, the method further comprises:

detecting whether the first cell is a cell configured to send a plurality of paging messages;

when the first cell is not configured to send the paging message for multiple times, the method resides in the next cell in the candidate cell set and detects whether the cell is configured to send the paging message for multiple times;

And camping to a target cell, wherein the target cell is a cell configured to send paging messages for a plurality of times in the candidate cell set.

3. The method of claim 2, wherein detecting whether the first cell camping is a cell configured to send multiple paging messages comprises:

when M paging messages from the first cells are received in the paging detection periods of continuous M first cells, and each received paging message contains identification information of a second terminal device, determining the first cell as a cell configured to send multiple paging messages;

when M paging messages from the first cells are not received in the paging detection periods of continuous M first cells, determining that the first cells are not configured to send paging messages for multiple times;

wherein M is an integer greater than or equal to 2.

4. A method according to claim 2 or 3, wherein after camping on the target cell, the method further comprises:

receiving a paging message from the target cell according to a first period; the first period is N times of the paging detection period of the target cell, and N is an integer greater than or equal to 2.

5. A method according to claim 2 or 3, wherein camping on the next cell in the set of candidate cells and detecting whether it is a cell configured to send a multiple paging message comprises:

and re-camping to the first cell when the candidate cell set does not contain a cell configured to send a plurality of paging messages.

6. The method of any of claims 2 to 4, wherein after camping on the target cell, the method further comprises:

only the signal strength of the target cell is detected.

7. The method of claim 6, wherein when the first terminal device is in a radio resource control, RRC, connected state, after detecting the signal strength of the target cell, the method further comprises:

and preventing reporting of the measurement report.

8. The method according to any one of claim 1 to 7,

before camping on the first cell, the method comprises:

determining a first set according to the signal strength of the at least one cell; wherein the first set comprises: a cell of the at least one cell having a signal strength greater than or equal to the first threshold;

after camping on the first cell, the method further comprises:

And when the first terminal equipment exits from the static mode, the first terminal equipment resides in a fourth cell with the highest standard in the first set.

9. The method of any of claims 2 to 4, wherein after camping on the target cell, the method further comprises:

and when the first terminal equipment exits the static mode, receiving a paging message from the target cell according to the paging detection period of the target cell.

10. The method of any of claims 2 to 4, wherein after camping on the target cell, the method further comprises:

and when the first terminal equipment is in an RRC connection state and the first terminal equipment is detected to have no uplink data and no downlink data, releasing the RRC connection between the first terminal equipment and the target cell.

11. A communication device, comprising:

a communication unit for receiving system information from at least one cell when the communication device enters a stationary mode; wherein the system information from the at least one cell includes information for indicating a paging detection period of any one of the at least one cell;

a processing unit for:

Measuring a signal strength of the at least one cell;

12. The apparatus of claim 11, wherein the processing unit is further to:

after residing to a first cell, detecting whether the residing first cell is a cell configured to send a plurality of paging messages;

13. The apparatus of claim 12, wherein the processing unit is specifically configured to:

when M paging messages from the first cells are received through the communication unit in paging detection periods of continuous M first cells and each received paging message contains identification information of a second terminal device, determining the first cells as cells configured to send paging messages for multiple times;

When M paging messages from the first cells are not received by the communication unit in the paging detection periods of continuous M first cells, determining that the first cells are not configured to transmit paging messages for a plurality of times;

wherein M is an integer greater than or equal to 2.

14. The apparatus of claim 12 or 13, wherein the communication unit is further configured to: after camping on a target cell, receiving a paging message from the target cell according to a first period; the first period is N times of the paging detection period of the target cell, and N is an integer greater than or equal to 2.

15. The apparatus according to claim 12 or 13, wherein the processing unit is specifically configured to: and re-camping to the first cell when the candidate cell set does not contain a cell configured to send a plurality of paging messages.

16. The apparatus of any of claims 12 to 14, wherein the processing unit is further to: after camping on a target cell, only the signal strength of the target cell is detected.

17. The apparatus of claim 16, wherein the processing unit is further to: and when the communication device is in a Radio Resource Control (RRC) connection state, after detecting the signal strength of the target cell, preventing reporting of a measurement report.

18. The apparatus of any one of claims 11 to 17, wherein the processing unit is further configured to:

determining a first set according to the signal strength of the at least one cell before camping on the first cell; wherein the first set comprises: a cell of the at least one cell having a signal strength greater than or equal to the first threshold;

after residing in the first cell, when the communication device exits the static mode, residing in a fourth cell with the highest standard in the first set.

19. The apparatus of any of claims 12 to 14, wherein the communication unit is further configured to:

and after the communication device resides in the target cell, when the communication device exits the static mode, receiving a paging message from the target cell according to a paging detection period of the target cell.

20. The apparatus of any of claims 12 to 14, wherein the processing unit is further to:

after camping on a target cell, when the communication device is in an RRC connected state and it is detected that the communication device has no uplink data and no downlink data, the RRC connection between the communication device and the target cell is released.

21. A communications apparatus comprising a processor coupled to a memory, the memory having a computer program stored therein; the processor is configured to invoke a computer program in the memory to cause the communication device to perform the method of any of claims 1 to 10.

22. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a computer program which, when run on a computer, causes the computer to perform the method of any of claims 1-10.

23. A chip, characterized in that the chip is coupled to a memory, the chip reading a computer program stored in the memory, performing the method of any of claims 1-10.

24. A communication device, comprising:

a processing circuit and an interface circuit; wherein,,

the interface circuit is configured to couple with a memory external to the communication device and provide a communication interface for the processing circuit to access the memory;

the processing circuitry is configured to execute program instructions in the memory to implement the method of any of claims 1 to 10.