CN114271022A

CN114271022A - Communication method and communication device

Info

Publication number: CN114271022A
Application number: CN202080015298.7A
Authority: CN
Inventors: 王培雷; 陈功; 李记锋; 郝治磊; 刘珺
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2022-04-01
Also published as: WO2022021328A1

Abstract

The present application provides a communication method and a communication device. The communication method includes: receiving request information of a first user identity, the request information is used to request an emergency call service, and the first user identity does not reside in a network supporting the emergency call service; when the second user identity resides in a network supporting the emergency call service When the network is connected, based on the access frequency point, a connection request is sent to the network device with the first user identity to perform the emergency call service, and the access frequency point is the frequency point corresponding to the second user identity. When the first user identity does not reside on the network that supports the emergency call service, and the second user identity resides on the network that supports the emergency call service, the emergency call service is performed based on the frequency point corresponding to the second user identity, which can reduce the size of the network. Search time to better meet the urgency of emergency calls.

Description

Communication method and communication device

Technical Field

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

Background

When a user is in danger or encounters an emergency and needs help, the emergency number is usually input into a dialing interface of a portable terminal and then dialed out through a Subscriber Identity Module (SIM). In general, the emergency call service may use any network available at the time.

In this process, once the communication service state of the SIM is abnormal, for example, the SIM has no communication service or does not receive a communication network signal corresponding to the SIM, the terminal device may perform network searching in a wider frequency band to determine an available frequency point. For example, the terminal device may perform network searching in all frequency bands supported by the device. The network searching time is long due to the wide range of the network searching, and the urgent requirement of the emergency call cannot be met.

Disclosure of Invention

The application provides a communication method and a communication device, which can reduce the time for searching an access frequency point for carrying out an emergency call service.

It should be understood that, in the solutions provided in the embodiments of the present application, the communication apparatus may be a wireless communication device, or may be a part of a device in the wireless communication device, such as an integrated circuit product, such as a system chip or a communication chip. The wireless communication device may be a computer device that supports wireless communication functionality.

In particular, the wireless communication device may be a terminal, such as a smartphone, or a radio access network device, such as a base station. A system-on-chip may also be referred to as a system-on-chip (SoC), or simply as an 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 rf processing chip is also sometimes referred to as a radio frequency transceiver (transceiver) or rf chip. In a physical implementation, part of the communication chip or all of the communication chip 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.

In a first aspect, a communication method is provided, including: receiving request information of a first user identity, wherein the request information is used for requesting to perform an emergency call service, and the first user identity is not resident in a network supporting the emergency call service; when a second user identity resides in a network supporting the emergency call service, a connection request is sent to network equipment by using the first user identity based on an access frequency point so as to carry out the emergency call service, wherein the access frequency point is a frequency point corresponding to the second user identity.

The first subscriber identity used for performing the emergency call service does not reside in the network supporting the voice service, and the connection request can be initiated based on the frequency point corresponding to the second subscriber identity residing in the network supporting the voice service. Because the terminal is resident in the network supporting the voice service, the frequency point corresponding to the second user identity comprises the access frequency point which can be used for initiating the emergency call, and the network searching range is reduced, so that the time for determining the access frequency point can be reduced in the process of searching the access frequency point, and the user experience is improved.

With reference to the first aspect, in some possible implementations, the method further includes: and searching according to at least one frequency point corresponding to the second user identity to determine the access frequency point.

And in the process of searching the access frequency point, the search range comprises at least one frequency point corresponding to the second user identity. Therefore, the time for determining the access frequency point can be reduced, and the user experience is improved.

With reference to the first aspect, in some possible implementation manners, the searching according to the at least one frequency point corresponding to the second user identity includes: and searching at least one frequency point corresponding to the first user identity and at least one frequency point corresponding to the second user identity to determine the access frequency point.

In the process of searching the access frequency point, the search range further comprises at least one frequency point corresponding to the first user identity. When the access frequency point does not exist in at least one frequency point corresponding to the user identity, searching in at least one frequency point corresponding to the second user identity to determine the access frequency point.

With reference to the first aspect, in some possible implementation manners, the access frequency point is a frequency point used by the second subscriber identity to reside in a network.

The second user identity resides in the network supporting the emergency call service, and the frequency point used by the second user identity resides in the network, so that the network searching range can be further reduced, the time for determining the access frequency point is reduced, and the user experience is improved.

With reference to the first aspect, in some possible implementations, the network device corresponds to the second user identity.

The network device corresponds to the second user identity and can provide service for the second user identity. The network device generally provides a service for the first user identity, which is not limited in this application. Based on the access frequency point, the first user identity can perform emergency call service through the service provided by the network equipment.

With reference to the first aspect, in some possible implementations, the second subscriber identity is determined according to a subscriber identity module SIM.

A communication device performing the method of the first aspect may be connected to a plurality of SIMs. Each SIM corresponds to a subscriber identity. When the first subscriber identity corresponding to one SIM is not resident in the network supporting the emergency call (for example, is not resident in the network), at least one frequency point corresponding to the second subscriber identity corresponding to the other SIMs residing in the network supporting the emergency call may be determined, and a connection request is established for an access frequency point in the at least one frequency point, so as to perform the emergency call service.

In a second aspect, a communication apparatus is provided, including: the device comprises a receiving module and a sending module; the receiving module is configured to receive request information of a first user identity, where the request information is used to request an emergency call service, and the first user identity is not resident in a network supporting the emergency call service; the sending module is used for sending a connection request to network equipment by using the first user identity based on an access frequency point to carry out the emergency call service, and the access frequency point is a frequency point corresponding to a second user identity.

With reference to the second aspect, in some possible implementations, the apparatus further includes a processing module; and the processing module is used for searching according to at least one frequency point corresponding to the second user identity so as to determine the access frequency point.

With reference to the second aspect, in some possible implementation manners, the processing module is configured to search for at least one frequency point corresponding to the first subscriber identity and at least one frequency point corresponding to the second subscriber identity to determine the access frequency point.

With reference to the second aspect, in some possible implementation manners, the access frequency point is a frequency point used by the second subscriber identity to reside in a network.

With reference to the second aspect, in some possible implementations, the network device corresponds to the second user identity.

With reference to the second aspect, in some possible implementations, the second subscriber identity is determined according to a subscriber identity module SIM.

In a third aspect, a communication apparatus is provided, which includes at least one processor and a communication interface, where the communication interface is used for the terminal device to perform information interaction with other communication apparatuses, and when program instructions are executed in the at least one processor, the program instructions cause the terminal device to perform the method according to the first aspect.

In a fourth aspect, a communication system is provided, which includes a network device, and the communication apparatus of the second aspect or the third aspect.

In a fifth aspect, there is provided a computer program storage medium having program instructions which, when executed, cause the method of the first aspect to be performed.

In a sixth aspect, a chip is provided, the system of chips comprising at least one processor, which when executed by program instructions causes the method of the first aspect to be performed.

Drawings

Fig. 1 is a schematic diagram of a communication scenario.

Fig. 2 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Fig. 3 is a schematic diagram of a terminal device.

Fig. 4 is a schematic flow chart diagram of a communication method.

Fig. 5 is a schematic flow chart of a communication method provided herein.

Fig. 6 is a schematic flow chart of another communication method provided herein.

Fig. 7 is a schematic flow chart of still another communication method provided by the present application.

Fig. 8 is a schematic flow chart of a communication method according to an embodiment of the present application.

Fig. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Fig. 10 is a schematic structural diagram of another terminal device according to another embodiment of the present application.

Fig. 11 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application.

Fig. 12 is a schematic block diagram of another communication apparatus according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the invention is mainly suitable for a wireless communication system. The wireless communication system may conform to a wireless communication standard of the third generation partnership project (3 GPP), but may also conform to other wireless communication standards such as the 802 series (e.g., 802.11, 802.15, or 802.20) wireless communication standards of the Institute of Electrical and Electronics Engineers (IEEE).

It should be understood that in a wireless communication system, devices may be divided into devices that provide wireless network services and devices that use wireless network services. The devices providing wireless network services refer to devices forming a wireless communication network, and may be referred to as network devices (network elements) for short. The network devices may be further classified into Radio Access Network (RAN) devices and Core Network (CN) devices. A typical RAN equipment includes a Base Station (BS).

The access network device may be configured to access a terminal to a Radio Access Network (RAN). An access network device may also sometimes be referred to as a wireless Access Point (AP), or a Transmission Reception Point (TRP). Thus, an access network device may sometimes also be referred to as an access device or an access network node. It will be appreciated that in systems employing different radio access technologies, the names of devices that function as base stations may differ. For convenience of description, in the embodiments of the present application, a device providing a wireless communication access function for a terminal is collectively referred to as an access network device. The access network device may be, for example, an evolved Node B (eNB) in a Long Term Evolution (LTE), or a next generation base station (gNB) in a New Radio (NR) mobile communication system of a fifth generation (5G), or an evolved Node B (eNB) in a 4G Long Term Evolution (LTE) system. The access network device may be a macro base station (macro base station) or a micro base station (micro base station). A micro base station is sometimes also referred to as a small base station or small cell (small cell). The access network device may also be a road side device or a certain terminal device having a wireless access function. The gNB may employ a Centralized Unit (CU) -Distributed Unit (DU) architecture, and the access network device may also be a device including a CU and/or a DU. In the embodiment of the present application, devices capable of implementing the functions related to the base station side in the embodiment of the present application are collectively referred to as access network devices.

Devices that use wireless network services are often located at the edge of the network and may be referred to as terminal devices. The user equipment can establish connection with the network equipment and provide wireless communication services for users based on the services of the network equipment. User equipment may communicate with one or more Core Networks (CNs) via access network equipment. Terminal equipment tends to move with the user relative to base stations, which are typically located at fixed locations. A terminal device may also sometimes be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless network device, a user agent, a Subscriber Unit (SU), or a user equipment. The user equipment may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities (e.g., a mobile phone), computing devices such as tablet computers (laptops) or other devices connected to wireless modems, in-vehicle devices, wearable devices such as smart watches, smart bracelets, smart helmets, smart glasses or internet of things (IOT) devices, terminal devices in the internet of vehicles, various smart home devices such as smart meters and smart appliances, and smart city devices such as security or monitoring devices, smart road transportation facilities, and user devices of any modality in future networks, and the like. Some network devices, such as Relay Nodes (RNs) or wireless routers, may also be considered as user equipments due to their UE identities or affiliations with users.

For convenience of description, the technical solutions of the embodiments of the present application will be described in detail by taking a base station and a terminal device as examples.

Fig. 1 is a schematic structural diagram of a wireless communication system according to an embodiment of the present disclosure. As shown in fig. 1, the wireless communication system includes a terminal device and a base station. Depending on the transmission direction, the transmission link from the terminal equipment to the base station is denoted as Uplink (UL), and the transmission link from the base station to the terminal equipment is denoted as Downlink (DL). Similarly, data transmission in the uplink may be abbreviated as uplink data transmission or uplink transmission, and data transmission in the downlink may be abbreviated as downlink data transmission or downlink transmission.

In the wireless communication system, a base station may provide communication coverage for a particular geographic area through an integrated or external antenna device. One or more terminal devices located within the communication coverage of the base station may each have access to the base station. One base station may manage one or more cells (cells). Each cell has an identity (identification), also called cell identity (cell ID). From the perspective of radio resources, one cell is a combination of downlink radio resources and (optionally) uplink radio resources paired therewith.

The terminal device and the base station should know predefined configurations of the wireless communication system, including Radio Access Technologies (RATs) supported by the system and radio resource configurations specified by the system, such as basic configurations of frequency bands and carriers of the radio. A carrier is a range of frequencies that conforms to system specifications. This frequency range may be determined by both the center frequency of the carrier (denoted as carrier frequency) and the bandwidth of the carrier. These system-predefined configurations may be part of the standard protocols of the wireless communication system or may be determined by the interaction between the terminal device and the base station. The contents of the relevant standard protocols may be pre-stored in the memories of the terminal device and the base station, or embodied as hardware circuits or software codes of the terminal device and the base station.

In the wireless communication system, the terminal device and the base station support one or more of the same RATs, e.g. 5G NR, 4G LTE, or RATs of future evolution systems. Specifically, the terminal device and the base station use the same air interface parameters, coding scheme, modulation scheme, and the like, and communicate with each other based on radio resources specified by the system.

The terminal device may include a number of components, such as: a memory (passive store), a processor, a baseband subsystem, a Radio Frequency Integrated Circuit (RFIC), a Radio Frequency Front End (RFFE) device, and an Antenna (ANT). These components may be coupled by various interconnection buses or other electrical connections.

ANT _1 denotes a first antenna, ANT _ N denotes an nth antenna, and N is a positive integer greater than 1. Tx denotes a transmission path, and Rx denotes a reception path. The numbers in Tx _0, Tx _1, Rx _0, Rx _1, Rx _2, Rx _3 represent different paths. Each path may represent a signal processing channel. FBRx denotes a feedback reception path, PRx denotes a main reception path, and DRx denotes a diversity reception path. HB denotes high frequency, LB denotes low frequency, and both denote relative high and low frequencies. BB denotes baseband.

The radio frequency subsystem comprises a radio frequency integrated circuit (including at least one RFIC, such as RFIC 1, RFIC 2, etc.) and a radio frequency front end device, etc. The RF subsystem may be divided into a RF receive path (RF receive path) and a RF transmit path (RF transmit path) according to the receiving or transmitting path of the signal. The rf receive channel may receive an rf signal via an antenna, process (e.g., amplify, filter, and downconvert) the rf signal to obtain a baseband signal, and deliver the baseband signal to the baseband subsystem. The rf transmit channel may receive the baseband signal from the baseband subsystem, process (e.g., upconvert, amplify, and filter) the baseband signal to obtain an rf signal, and finally radiate the rf signal into space via an antenna. The radio frequency integrated circuit may be referred to as a radio frequency processing chip or a radio frequency chip.

In particular, the rf subsystem may include antenna switches, antenna tuners, Low Noise Amplifiers (LNAs), Power Amplifiers (PAs), mixers (mixers), Local Oscillators (LOs), filters (filters), and other electronic devices, which may be integrated into one or more chips as desired. The radio frequency integrated circuit may be referred to as a radio frequency processing chip or a radio frequency chip. The rf front-end device may also be a separate chip. The radio frequency chip is sometimes also referred to as a receiver, transmitter, or transceiver. As technology evolved, antennas may sometimes also be considered part of the rf subsystem and may be integrated into the chip of the rf subsystem. The antenna, the rf front-end device and the rf chip may all be manufactured and sold separately. Of course, the rf subsystem may also adopt different devices or different integration modes based on the requirements of power consumption and performance. For example, some devices belonging to the rf front end are integrated into a rf chip, and even an antenna and the rf front end device are integrated into a rf chip, which may also be referred to as a rf antenna module or an antenna module.

The baseband subsystem mainly completes the processing of the baseband signal. The baseband subsystem may extract useful information or data bits from the baseband signal or convert the information or data bits to a baseband signal to be transmitted. These information or data bits may be data representing user data or control information such as voice, text, video, etc. For example, the baseband subsystem may perform signal processing operations such as modulation and demodulation, encoding and decoding. The baseband signal processing operations are also not exactly the same for different radio access technologies, such as 5G NR and 4G LTE.

In addition, since the rf signal is usually an analog signal, the signal processed by the baseband subsystem is mainly a digital signal, and an analog-to-digital conversion device is also required in the wireless communication device. In the embodiment of the present application, the analog-to-digital conversion device may be disposed in the baseband subsystem, and may also be disposed in the radio frequency subsystem. The analog-to-digital conversion device includes an analog-to-digital converter (ADC) that converts an analog signal into a digital signal, and a digital-to-analog converter (DAC) that converts a digital signal into an analog signal.

The baseband subsystem may be integrated into one or more chips, which may be referred to as baseband processing chips or baseband chips. The baseband subsystem may be implemented as a stand-alone chip, which may be referred to as a modem (modem) or modem chip. The baseband subsystem may be manufactured and sold in units of modem chips. modem chips are also sometimes referred to as baseband processors or mobile processors. In addition, the baseband subsystem may be further integrated into a larger chip, and manufactured and sold in units of larger chips. This larger chip may be referred to as a system-on-chip, system-on-a-chip or system-on-a-chip (SoC), or simply as an SoC chip. The software components of the baseband subsystem may be built in the hardware components of the chip before the chip leaves factory, or may be imported into the hardware components of the chip from other nonvolatile memories after the chip leaves factory, or may be downloaded and updated in an online manner through a network.

In the embodiment of the application, the communication subsystem comprises a baseband subsystem and a radio frequency subsystem and provides a wireless communication function for the wireless communication equipment. In general, the baseband subsystem is responsible for managing the software and hardware resources of the communication subsystem and may configure the operating parameters of the radio frequency subsystem. The processor of the baseband subsystem may run a sub-operating system of the communication subsystem, which is often an embedded operating system or a real time operating system (real time operating system).

More and more terminal devices currently support the simultaneous insertion of two Subscriber Identity Module (SIM) cards. For example, one SIM card is used for private services, and another SIM card is used for working services; or one SIM card is used for data services and the other SIM card is used for voice services. This traffic mode may be referred to as dual card mode. The dual cards may belong to the same mobile operator or different mobile operators, or the dual cards may belong to the same system or different systems. For example, the standard may include a 5G system, an LTE system, a WCDMA system, a CDMA system, a GSM system, and the like.

The terminal device supporting two SIM cards may also be referred to as a terminal device supporting two "subscriber identities" or a terminal device with Dual SIM Dual Standby (DSDS), that is, the terminal device may insert two SIM cards, and the two SIMs can be in standby simultaneously. The "user identity" is further explained below.

In the present embodiment, a "user identity" (e.g., a first user identity or a second user identity) is a logical concept. For example, a "subscriber identity" may correspond to a Subscriber Identity Module (SIM) card or subscriber information or a virtual SIM card or subscriber identity (e.g., International Mobile Subscriber Identity (IMSI) or Temporary Mobile Subscriber Identity (TMSI)), etc. from the perspective of the network side, different "subscriber identities" logically correspond to different communication entities served by the network side, e.g., a terminal device that supports two subscriber identities may be considered two communication entities for the network side, and, as another example, a "subscriber identity" corresponds to a SIM card or subscriber information, the network side may identify the same terminal device as multiple different SIM cards or multiple subscriber information as multiple different communication entities, even though in practice, the terminal device that supports multiple different SIM cards or multiple subscriber information is only one physical entity, in the embodiment of the present application, a SIM card corresponding to a "subscriber identity" is mainly taken as an example for description.

For example, the SIM card may be understood as a key for the terminal device to access the mobile network, and for convenience of description, the SIM card and its evolution are collectively referred to as the SIM in the embodiments of the present application. For example, the SIM may be an identification card of a global system for mobile communications (GSM) digital mobile phone user, which is used for storing an identification code and a secret key of the user and supporting authentication of the GSM system to the user; for another example, the SIM card may be a Universal Subscriber Identity Module (USIM), which may also be referred to as an upgraded SIM card; for another example, the SIM may be a Universal Integrated Circuit Card (UICC), an embedded SIM (eSIM), a soft SIM, or other forms capable of identifying the identity of the user. The embodiment of the present application is illustrated by a SIM, and does not limit the present application.

A terminal device supporting two subscriber identities, for example, a terminal device capable of supporting two SIMs, will be described below. A base station of one SIM may also be said to be a base station corresponding to a user identity in the terminal device, and may also be understood as a communication entity corresponding to the SIM served by the base station. Fig. 3 is a schematic diagram of three terminal devices supporting dual SIM according to an embodiment of the present application. According to different transceiving capabilities of the terminal equipment, the terminal equipment including the dual-SIM can be divided into the following three modes.

Fig. 3(a) is a passive (passive) mode, although two SIMs can be inserted, only one SIM can be used at a time, i.e. receive and transmit, and the other SIM is not available (unused).

Fig. 3(b) shows a Dual SIM Dual Standby (DSDS) mode, where two SIMs share one transceiver, and the terminal device in the RRC idle state needs to monitor paging messages of the two cards, for example, using a time-division multiplexing (TDM) mode. When an RRC connection exists between the terminal device and a base station of one SIM (e.g., SIM 1), it may also be called that SIM 1 enters an RRC connected state, or enters the RRC connected state with the first subscriber identity, that is, data can be sent and received, the terminal device cannot maintain an RRC connection with a base station of another SIM (e.g., SIM 2), or may be said that SIM 2 is in an RRC idle state or an RRC deactivated state, or is said that the second subscriber identity is in an RRC idle state or an RRC deactivated state.

Fig. 3(c) shows a Dual SIM Dual Active (DSDA) mode: the two SIMs correspond to respective transceivers. The two SIMs may be in the RRC connected state at the same time, or in other words, in the RRC connected state at the same time with two subscriber identities, that is, the terminal device may receive and transmit data of the two SIMs at the same time.

Furthermore, the terminal device in the method 200 may also possess two or even more SIMs, or two or even more subscriber identities, in particular, subscriber identity #1 may be able to send a connection request to the first network device to access the first network. When the user identity #1 accesses the first network, the user identity #1 resides in the first network. When the user identity #1 needs to leave the first network, the user identity #1 may initiate a de-registration procedure with the first network.

Fig. 4 is a schematic flow chart diagram of a communication method.

Many countries have hot lines set up for emergency calls (emergency calls) in order to help people in the event of a critical situation, using police, fire or rescue emergency services. There may be differences in the distress telephone numbers of each country. The call for help is generally composed of 3 numbers for the help seeker to remember and dial. Some countries have several telephone numbers for help and contact different departments that provide emergency services. The urgency of these numbers has led countries to specify that they can use any network available at the time.

When the emergency call service needs to be initiated, if the SIM resides in a network supporting the voice call service, the emergency call service can be performed through the network where the SIM resides.

If the SIM does not reside in the network or resides in a network that does not support the emergency call service, a search is usually performed within a frequency band supported by the SIM to determine an access frequency point. And the network corresponding to the access frequency point supports the emergency call service. And when the frequency band supported by the SIM does not have the access frequency point, searching the access frequency point in the full frequency band. The process of searching to determine the access frequency point may be referred to as network searching or network searching.

For example, when the SIM does not reside in the network, the terminal device may establish a connection with the network device according to the procedure shown in fig. 3 to perform an emergency call service.

At S110, an access frequency point for the emergency call is searched in the history frequency point of the SIM. If the search is successful, that is, the access frequency point exists in the historical frequency points of the SIM, S140 is performed. If the SIM fails, that is, no access frequency point exists in the historical frequency points of the SIM, S120 is performed. The historical frequency point of the SIM may be understood as a frequency point where the SIM resides before S110, or a frequency point used by the SIM before S110.

And S120, searching an access frequency point in the support frequency band of the SIM. If the search is successful, that is, there is an access frequency point in the supported frequency band of the SIM, proceed to S140. If the failure is successful, that is, there is no access frequency point in the supported frequency band of the SIM, S130 is performed.

In S130, the access frequency point is searched in the full frequency band. The full frequency band can be understood as all frequency points at which the terminal device supports the emergency call service. If the search is successful, that is, the access frequency point exists in the full frequency band, S140 is performed. And if the emergency call fails, namely the access frequency point does not exist in the full frequency band, the emergency call fails.

And S140, sending a connection request to the network equipment based on the access frequency point so as to initiate the emergency call.

The time length of the full-band network searching is strongly related to the bandwidth of the communication frequency band supported by the terminal equipment. The wider the communication frequency band is, the more frequency points are needed for searching the network, and the longer the time is consumed. Taking the current domestic all-network mobile phone (terminal equipment supporting mobile communication systems of various domestic operators) in China as an example, the time of searching the network in all frequency bands is over 200 seconds.

Therefore, when the SIM for performing the emergency call service does not reside in the network supporting the emergency call service, and particularly when there is no access frequency point for the emergency call in the frequency band supported by the SIM, under the condition that the access frequency point needs to be determined by searching in the full frequency band, determining the access frequency point needs a long time, consumes much time, cannot meet the urgent requirement of the emergency call, and is poor in user experience.

In order to solve the above problem, an embodiment of the present application provides a communication method.

Fig. 5 is a schematic flow chart of a communication method provided herein. The communication method 400 is for a terminal device. The terminal device connects the first SIM and the second SIM.

For emergency call services, the first SIM is prioritized over the second SIM. For example, the first SIM may be a SIM selected by the user or preset by the terminal device for making emergency calls.

Prior to S410, it may be determined whether the first SIM resides in a network supporting emergency call services.

In S410, in a case that the first SIM is not resident in a network supporting the emergency call service, a search is performed according to a preferred frequency point of the second SIM to determine an access frequency point.

For example, the first SIM may not reside in any network, i.e., the first SIM may be in a lost network state. Or the network where the first SIM resides does not support voice call services such as emergency calls.

And the network corresponding to the access frequency point supports the emergency call service, or the access frequency point supports the emergency call service. The access frequency point may be a frequency point supporting a voice call service.

The preferred frequency points of the second SIM may include a frequency point used by the second SIM currently residing in the network, a frequency point (for example, of an operator device) with a higher priority corresponding to the second SIM in an area where the terminal device is located, and a historical frequency point of the second SIM, and the like. The historical frequency point of the second SIM, i.e., at least one frequency point used by the second SIM to ever reside in the network before S410. The frequency point used by the second SIM for camping in the network may also be referred to as a camping frequency point of the second SIM.

It should be understood that, when the terminal device includes multiple SIMs, the access frequency point may be determined according to the preferred frequency point of each SIM in all or part of the SIMs except the first SIM.

In the process of S410, a search may be performed according to at least one frequency point corresponding to the first SIM and the preferred frequency point of the second SIM to determine an access frequency point.

The at least one frequency point corresponding to the first SIM may include a historical frequency point of the first SIM. The historical frequency points for the first SIM include at least one frequency point that the first SIM was camped on in the network before proceeding with S410.

The at least one frequency point corresponding to the first SIM may further include a first supported frequency point. The first supported frequency points comprise a plurality of frequency points supported by the first SIM. The first supported frequency point may also be understood as a frequency band supported by the first SIM.

Before searching, the preferred frequency point of the second SIM and the frequency points supporting voice services among other frequency points can be determined. And then, searching in the frequency points supporting the voice service.

In the searching process, the frequency point with the communication quality meeting the preset condition can be used as the access frequency point. The quality of communication can be measured as the degree of goodness of the communication network during telecommunications communication. The communication quality is usually used to predict or evaluate the communication quality between the terminals making a call, i.e. the end-to-end communication quality, or the end-to-end communication condition. Communication quality is typically determined by communication parameters that characterize the quality of the communication, e.g., the quality of the communication may be represented by one or more of a bit error rate, a signal strength value, a signal to noise ratio, etc.

Specifically, the terminal device may evaluate the communication quality of each frequency point by detecting a signal strength value of the communication network of the frequency point. The terminal device can detect the signal intensity value of the communication network corresponding to one frequency point. The terminal equipment can obtain a first signal intensity value of the detected frequency point, and based on the first signal intensity value, the communication quality of the frequency point is evaluated according to a preset communication evaluation rule.

Optionally, the terminal may further measure the communication quality of each frequency point by measuring at least one of parameters of signal receiving power (RSRP), Received Signal Code Power (RSCP), ratio of power PER modulation bit to noise spectral density (ratio of power PER modulation bit to noise spectral density, EcNo), signal to noise ratio (SNR), Reference Signal Receiving Quality (RSRQ), Bit Error Rate (BER), block error rate (BLER), Packet Error Rate (PER), and the like of signals received by the antenna, and may also measure other parameters to determine the communication quality of each frequency point.

In at least one frequency point corresponding to the first SIM and at least one frequency point corresponding to the second SIM, there may be multiple frequency points whose communication quality meets a preset condition. Due to the urgency of the emergency call, when the first frequency point with the communication quality meeting the preset condition is detected, the first frequency point can be used as an access frequency point.

When the access frequency point does not exist in the preferred frequency point of the second SIM, network searching is carried out according to the frequency point corresponding to the first SIM so as to determine the access frequency point.

Or when the access frequency point does not exist in the historical frequency points of the first SIM, the access frequency point can be determined according to the preferred frequency point of the second SIM. Reference may be made in particular to fig. 7.

And searching in a plurality of frequency points supported by the first SIM when determining that no access frequency point exists in the historical frequency point of the first SIM and the preferred frequency point of the second SIM, thereby determining the access frequency point. Reference may be made in particular to fig. 6.

And S420, sending a connection request to the network equipment based on the access frequency point so as to perform emergency call service.

And searching according to the preferred frequency point of the second SIM, so as to determine the access frequency point, perform network access and emergency call, improve the success rate of determining the access frequency point, reduce the time for determining the access frequency point, reduce the time consumption for performing emergency call service, and improve the user experience.

The embodiment of the present application does not limit the identity of the user making the emergency call.

The terminal device may send a connection request to the network device through the first SIM, the second SIM, the IMSI, or the TMSI, which is not limited in the embodiment of the present application.

For example, when the access frequency point is a frequency point supported by the first SIM and a frequency point outside the frequency points supported by the second SIM, the emergency call is performed by using the IMSI or the TMSI. And when the access frequency point is the frequency point supported by the first SIM, carrying out emergency call by the first SIM. And when the access frequency point is the frequency point supported by the second SIM, carrying out emergency call by the second SIM.

In one aspect, the first SIM is a SIM for emergency calls, supporting voice services. The second SIM may only support data services and not voice services. Sending a connection request with the first SIM may increase the likelihood of success of the emergency call.

On the other hand, the first SIM may be a SIM selected by the user for an emergency call, or may be a SIM that the terminal device defaults to performing a voice service. The emergency call is performed through other identities, and the terminal device is required to perform identity switching, which may take a certain time. The first SIM is used for sending the connection request, so that the urgent requirement of the emergency call service can be better met.

Through S410 to S420, the first SIM for the emergency call is not resident in the network supporting the voice service, and may perform a search according to the preferred frequency point of the second SIM to determine an access frequency point for performing the emergency call service. When the access frequency point is searched, the preferred frequency point of the second SIM is considered, so that the time for determining the access frequency point can be reduced, and the user experience is improved.

Fig. 6 is a schematic flow chart of a communication method provided in an embodiment of the present application.

And searching in a plurality of frequency points supported by the first SIM when determining that no access frequency point exists in the historical frequency point of the first SIM and the preferred frequency point of the second SIM, thereby determining the access frequency point. The preferred frequency point of the second SIM is the camping frequency point used for the current camping of the second SIM.

And S510, searching in the history frequency point of the first SIM and the resident frequency point of the second SIM. If the search is successful, that is, the access frequency point exists in the history frequency point of the first SIM and the resident frequency point of the second SIM, S540 is performed. If the failure occurs, no access frequency point exists in the history frequency point of the first SIM and the resident frequency point of the second SIM, then S520 is performed.

Searching the network in each frequency point, namely detecting the communication quality of each frequency point, thereby taking the frequency point with the communication quality meeting the preset conditions as an access frequency point.

At S520, a search is performed in the first supported frequency bin. If the search is successful, an access frequency point exists in the first supporting frequency point, and S540 is performed. If the failure occurs, the access frequency point does not exist in the first supporting frequency point, and then S530 is performed.

It should be understood that in the process of S520, the network search may be performed only in the first supporting frequency point outside the historical frequency point of the first SIM, so as to avoid repeated search of the same frequency point.

At S530, a full band search is performed. If the search is successful, that is, the access frequency point exists in the full frequency band, S540 is performed. And if the emergency call fails, namely the access frequency point does not exist in the full frequency band, the emergency call fails.

It should be understood that in the process of S530, only frequency points other than the first supporting frequency point and the camping frequency point of the second SIM may be searched, so as to avoid repeated searching of the same frequency point.

At S540, a connection request is sent to the network device based on the access frequency point to initiate an emergency call.

Under the condition that the first SIM used for emergency call is not resident in the network supporting voice call, when the emergency call is carried out, searching is carried out according to the historical frequency point of the first SIM and the resident frequency point of the second SIM so as to determine the access frequency point, therefore, the voice call is carried out based on the access frequency point, the resident frequency point of the first SIM is considered when the access frequency point is determined by searching, the time for determining the access frequency point can be reduced, and the user experience is improved.

Illustratively, in S510 or S520, a search may also be performed in the historical frequency point of the second SIM to determine the access frequency point. If the search is successful, that is, there is an access frequency point, S540 is performed. If the search fails, namely no access frequency point exists, the search is carried out in a larger frequency range.

In S530, in the full frequency band searching process, the search may be performed only outside the first supported frequency point and the resident frequency point of the second SIM.

Fig. 7 is a schematic flow chart of a communication method provided in an embodiment of the present application.

When it is determined that no access frequency point exists in the historical frequency points of the first SIM, searching is performed according to the preferred frequency point of the second SIM, and the access frequency point is determined. The preferred frequency point of the second SIM is taken as the camping frequency point of the second SIM as an example.

At S610, a search is performed in a historical frequency point of the first SIM. If the search is successful, that is, the access frequency point exists in the historical frequency points of the first SIM, S640 is performed. If the failure occurs, no access frequency point exists in the historical frequency points of the first SIM, then S620 is performed.

And S620, searching in the first supporting frequency point and the resident frequency point of the second SIM. If the search is successful, an access frequency point exists in the first supporting frequency point and the resident frequency point of the second SIM, and S640 is performed. If the frequency point fails, no access frequency point exists in the first supporting frequency point and the resident frequency point of the second SIM, then S630 is performed.

At S630, a full band search is performed. If the search is successful, that is, the access frequency point exists in the full frequency band, S640 is performed. And if the emergency call fails, namely the access frequency point does not exist in the full frequency band, the emergency call fails.

It should be understood that, in the full-band search process, only the frequency points other than the first supporting frequency point may be searched.

At S640, a connection request is sent to the network device based on the access frequency point to initiate an emergency call.

For example, before S630, a network search may also be performed in a frequency point supported by the second SIM. And when the access frequency point does not exist in the frequency points supported by the second SIM, performing S630.

Fig. 8 is a schematic flow chart of a communication method provided in an embodiment of the present application.

At S1010, request information of a first subscriber identity is received, where the request information is used to request an emergency call service, and the first subscriber identity is not resident in a network supporting the emergency call service.

In S1020, when a second subscriber identity resides in a network supporting the emergency call service, a connection request is sent to a network device by using the first subscriber identity based on an access frequency point to perform the emergency call service, where the access frequency point is a frequency point corresponding to the second subscriber identity.

S1010 to S1020 may be executed by a hardware device such as a terminal device or at least one processor.

When the terminal device executes S1010 to S1020, the request information of the first user identity may be input by a User Interface (UI) of the terminal device user. The terminal device user may select the first user identity on the UI of the terminal device, or the first user identity may be a default user identity of the terminal device. And the terminal equipment user inputs an emergency call number and clicks an icon for indicating a call, and the terminal equipment receives request information which is used for requesting to carry out emergency call service.

When the plurality of processors in the terminal device perform S1010 to S1020, the application processor in the plurality of processors is configured to perform S1010. And the application processor receives the operation of the terminal equipment user on the UI, wherein the operation can be understood as the request information of the first user identity, and requests to perform the emergency call service based on the first user identity. A communication processor of the plurality of processors is configured to perform S1020. The communication processor may determine whether the second subscriber identity resides in a network supporting the emergency call service, and send a connection request to the network device with the first subscriber identity based on the access frequency point when the second subscriber identity resides in the network supporting the emergency call service. The communication processor may be a baseband processor or a mobile processor, etc.

When the communication chip performs S1010 to S1020, the communication chip may receive request information of the first subscriber identity, which is sent by the application processor, the request information indicating an emergency call. The application processor can determine the request information of the first user identity according to the operation of the terminal device user on the UI of the terminal device, and sends the request information to the communication chip. Thus, the communication chip may perform S1010 to S1020. The communication chip may be a modem chip or other chip for implementing the functionality of a baseband processor, a mobile processor, a communication processor.

Before S1020, a search may also be performed according to at least one frequency point corresponding to the second user identity, so as to determine the access frequency point.

That is to say, when performing network search and establishing the network connection of the emergency call service, the range of the network search may include at least one frequency point corresponding to the second user identity.

Of course, in some embodiments, the scope of the network search may also include at least one frequency point corresponding to the first subscriber identity.

In some embodiments, it may be determined preferentially whether the frequency point used by the second subscriber identity residing in the network meets the requirement of the emergency call service, and if the requirement is met, the frequency point used by the second subscriber identity residing in the network is used as the access frequency point. Therefore, the time occupied by network searching can be further reduced, and the user experience is improved.

The access frequency point is a frequency point corresponding to the second user identity, so the network device is a network device corresponding to the second user identity. The network equipment can provide service for users through the access frequency point.

It should be understood that the subscriber identity may be determined from the SIM. Each SIM is used to indicate a subscriber identity. Different operators use different frequency bands. Typically, the network equipment of each operator is used to provide services for the subscriber identity indicated by the SIM of that operator. The network device of the operator is the network device corresponding to the user identity indicated by the SIM of the operator.

The emergency call service may use any of the networks available at the time. For the emergency call service, whether the identity information is the subscriber identity indicated by the SIM of a certain operator, the network equipment of the operator can provide the service of the emergency call service.

The terminal device 800 connects a first subscriber identity module SIM and a second SIM. For emergency call services, the first SIM is prioritized over the second SIM.

The terminal device 800 includes a search module 810 and a transceiver module 820.

The searching module 810 is configured to, when the first SIM is not resident in a network supporting the emergency call service, search according to a preferred frequency point of the second SIM to determine an access frequency point, where a network corresponding to the access frequency point supports the emergency call service.

The transceiver module 820 is configured to send a connection request to a network device based on the access frequency point, so as to perform the emergency call service.

Optionally, the searching module 810 is configured to search according to at least one frequency point corresponding to the first SIM and a preferred frequency point of the second SIM to determine the access frequency point.

Optionally, the searching module 810 is configured to search among historical frequency points of the first SIM, where the historical frequency points of the first SIM include at least one frequency point used by the first SIM before the access frequency point is determined, and the at least one frequency point information corresponding to the first SIM includes the historical frequency point of the first SIM.

The searching module 810 is configured to, when the access frequency point does not exist in the historical frequency points of the first SIM, search in the preferred frequency point of the second SIM to determine the access frequency point.

Optionally, the searching module 810 is configured to, when the access frequency point does not exist in the preferred frequency points of the second SIM, search in a first supported frequency point to determine the access frequency point, where at least one frequency point information corresponding to the first SIM includes the first supported frequency point, and the first supported frequency point includes multiple frequency points supported by the first SIM.

Optionally, the preferred frequency point of the second SIM includes a frequency point used by the second SIM currently residing in a network.

Optionally, the first SIM selects a SIM for the user to use for making an emergency call.

Optionally, the transceiver module 820 is configured to send a connection request to the network device with the first SIM.

Fig. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

The terminal device 900 connects the first subscriber identity module SIM and the second SIM. For emergency call services, the first SIM is prioritized over the second SIM.

Terminal device 900 includes a processor 910 and a communication interface 920.

The processor 910 is configured to, when the first SIM is not resident in a network supporting the emergency call service, search according to a preferred frequency point of the second SIM to determine an access frequency point, where a network corresponding to the access frequency point supports the emergency call service.

The communication interface 920 is configured to send a connection request to a network device based on the access frequency point, so as to perform the emergency call service.

Optionally, the processor 910 is configured to search according to at least one frequency point corresponding to the first SIM and a preferred frequency point of the second SIM to determine the access frequency point.

Optionally, the processor 910 is configured to search for a historical frequency point of the first SIM, where the historical frequency point of the first SIM includes at least one frequency point used by the first SIM before the access frequency point is determined, and the at least one frequency point information corresponding to the first SIM includes the historical frequency point of the first SIM.

The processor 910 is configured to, when the access frequency point does not exist in the historical frequency points of the first SIM, search in a preferred frequency point of the second SIM to determine the access frequency point.

Optionally, the processor 910 is configured to, when the access frequency point does not exist in preferred frequency points of a second SIM, search in a first supported frequency point to determine the access frequency point, where at least one frequency point information corresponding to the first SIM includes the first supported frequency point, and the first supported frequency point includes multiple frequency points supported by the first SIM.

Optionally, the communication interface 920 is configured to send a connection request to the network device with the first SIM.

Fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application.

The communication device 2000 includes a receiving module 2010 and a transmitting module 2020.

The receiving module 2010 is configured to receive request information of a first subscriber identity, where the request information is used to request an emergency call service, and the first subscriber identity is not resident in a network supporting the emergency call service.

The sending module 2020 is configured to, when the second subscriber identity resides in a network supporting the emergency call service, send a connection request to a network device by using the first subscriber identity based on an access frequency point to perform the emergency call service, where the access frequency point is a frequency point corresponding to the second subscriber identity.

Optionally, the communication apparatus 2000 includes a processing module, configured to search according to at least one frequency point corresponding to the second user identity, so as to determine the access frequency point.

Optionally, the processing module is configured to search for at least one frequency point corresponding to the first user identity and at least one frequency point corresponding to the second user identity to determine the access frequency point.

Optionally, the access frequency point is a frequency point used by the second subscriber identity residing in the network.

Optionally, the network device corresponds to the second user identity.

Optionally, the second subscriber identity is determined according to a subscriber identity module SIM.

Fig. 12 is a schematic structural diagram of a communication device according to an embodiment of the present application.

The communication device 3000 includes a processor 3010 and a communication interface 3020.

The communication interface 3020 is used for the communication device 3000 to interact with other devices in information, and when program instructions are executed in the processor 3010, causes the communication device 3000 to perform the methods as described above.

The embodiment of the present application further provides a communication system, which includes the foregoing terminal device and network device. The network device is configured to receive a connection request.

An embodiment of the present application further provides a communication system, which includes the foregoing communication apparatus and network device.

Embodiments of the present application further provide a computer program storage medium, which is characterized by having program instructions, when executed, cause the method in the foregoing to be performed.

An embodiment of the present application further provides a chip system, where the chip system includes at least one processor, and when the program instructions are executed in the at least one processor, the method in the foregoing is performed.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments of the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and may mean that a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) 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: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

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

Claims

PCT domestic application, the claims have been published.