CN112953668A - Time service method of communication system and related equipment - Google Patents
Time service method of communication system and related equipment Download PDFInfo
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- CN112953668A CN112953668A CN201911261572.4A CN201911261572A CN112953668A CN 112953668 A CN112953668 A CN 112953668A CN 201911261572 A CN201911261572 A CN 201911261572A CN 112953668 A CN112953668 A CN 112953668A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0658—Clock or time synchronisation among packet nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/28—Timers or timing mechanisms used in protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
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- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
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Abstract
The embodiment of the application discloses a time service method of a communication system and related equipment: firstly, the access network device (e.g., 5G base station) acquires the UTC high-precision reference time, and determines the system time information of the access network device according to the UTC high-precision reference time (e.g., the 5G base station acquires the UTC high-precision reference time from a time reference source such as GNSS or 1588V2 synchronization), and the access network device periodically transmits the acquired system time information to the corresponding UE, so that the UE can perform time synchronization according to the system time information of the access network device. In the embodiment of the present application, a communication system (e.g., a 5G system) requires time synchronization of the whole network, and the accuracy of basic service synchronization is required to be ± 1.5 microseconds (relative to UTC), so that the system time information of the access network device is used as the source of the system time of the UE, which not only has no limitation on the use scenario, but also greatly shortens the time service path, thereby improving the time service accuracy.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a time service method for a communication system and a related device.
Background
The "time service" refers to an operation of transmitting a standard time signal by using radio waves. According to different time service means, the method is divided into short-wave time service, long-wave time service, satellite time service, internet and telephone time service and the like.
At present, time service methods adopted by User Equipment (UE) such as a mobile phone and a smart watch generally include network time service and satellite time service, where the network time service is that the UE acquires time from a network, for example, the UE acquires a standard time signal from the network by using a User inquiry method, and specific UE network time service schemes generally include two types: a. acquiring Time by using a Network Identification and Time Zone (NITZ); b. time is obtained from a Network Time Protocol (NTP) server. The satellite time service can realize large-area coverage of the broadcast signal, and the satellite time service is divided into an active type satellite and a transfer type satellite according to the action of the satellite in the time service, wherein the active type satellite is provided with a precise clock and can broadcast a standard time signal; the relay Satellite only transmits the standard time signal transmitted from the ground time reference through the Satellite ground station, and if the UE internally supports a Global Navigation Satellite System (GNSS), the UE also supports time acquisition from the GNSS of the UE itself.
If the time acquired by the UE originates from the NTP server, the time service accuracy is low due to the long distance traveled by the time service, for example, the time acquired by the mobile phone from the NTP server may have a difference of 1s to 2s in networks provided by different operators. If the time acquired by the UE is derived from satellite time service, the time can be acquired only when the UE with its own GNSS is available, for example, an indoor scene cannot be time-serviced by the satellite (therefore, this method is not generally used as a reference source for UE time service).
Disclosure of Invention
A first aspect of the present application provides a time service method for a communication system, which specifically includes:
firstly, the access network equipment acquires Coordinated Universal Time (UTC) high-precision reference Time, and determines system Time information of the access network equipment according to the UTC high-precision reference Time, and the access network equipment periodically transmits the acquired system Time information to corresponding UE (user equipment), so that the UE can perform Time synchronization according to the system Time information of the access network equipment.
In the above embodiments of the present application, a communication system (e.g., a 5G system) requires time synchronization of the whole network, and the accuracy of basic service synchronization is required to be ± 1.5 microseconds (relative to UTC), so that the system time information of the access network device is used as the source of the system time of the UE, which not only has no limitation on the usage scenario, but also greatly shortens the time service path, thereby improving the time service accuracy.
With reference to the first aspect of the present application, in the first implementation manner of the first aspect of the present application, the access network device may obtain the UTC high-precision reference time from a GNSS time reference source, and the access network device may also obtain the UTC high-precision reference time from a time reference source of a 1588V2 clock, which is not limited herein.
In the foregoing embodiments of the present application, two ways for the access network device to obtain the UTC high-precision reference time are specifically set forth, and the two ways are selectable.
With reference to the first aspect of the present application and the first implementation manner of the first aspect of the present application, in the second implementation manner of the first aspect of the present application, the system time information may include year, month, day, hour, minute, second, millisecond, and microsecond, the system time information may also include year, month, day, hour, minute, second, and millisecond, the system time information may also include year, month, day, hour, minute, second, and microsecond, and specifically, information specifically included in the system time information is not limited, and is determined by precision required by the UE.
In the above embodiments of the present application, it is stated that what the system time information may specifically include is determined by the precision required by the UE whether the system time information is to include microseconds and/or milliseconds, and flexibility is provided.
With reference to the first aspect of the present application and the first implementation manner to the second implementation manner of the first aspect of the present application, in a third implementation manner of the first aspect of the present application, the provided time service method of the communication system may be applied to various communication networks, for example, may be applied to a 5G communication network, and may also be applied to future communication networks, for example, a 6G network, a 7G network, and the like, and the name of the related network element/device is not limited, and may be replaced by the name of the network element/device having the same or similar function in the future communication network, and the application is not limited, for example, the communication system may be a 5G communication system, and an access network device in the 5G communication system may be a 5G base station.
In the above embodiments of the present application, it is explained that the related communication system is a 5G communication system, and the corresponding access network device is a 5G base station, which has practicability.
The second aspect of the present application further provides a time service method for a communication system, including: firstly, UE judges whether system time information sent by corresponding access network equipment is acquired in a preset period or not, wherein the system time information is determined by the access network equipment according to the acquired UTC high-precision reference time; if the UE determines that the system time information sent by the corresponding access network device is obtained within the preset period, the UE may perform time synchronization according to the system time information, that is, the system time of the access network device is used as the system time of the UE.
In the above embodiments of the present application, a communication system (e.g., a 5G system) requires time synchronization of the whole network, and the accuracy of basic service synchronization is required to be ± 1.5 microseconds (relative to UTC), so that the system time information of the access network device is used as the source of the system time of the UE, which not only has no limitation on the usage scenario, but also greatly shortens the time service path, thereby improving the time service accuracy.
With reference to the second aspect of the present application, in the first implementation manner of the second aspect of the present application, if the UE does not acquire the system time information within the preset period (e.g., the access network device does not send the system time information to the UE), the UE may perform time synchronization according to the network time service manner (e.g., using NITZ to acquire time or using an NTP server to acquire time) or the satellite time service manner (e.g., a scenario where a GNSS of the UE itself is available).
In the foregoing embodiments of the present application, it is specifically stated that if the UE cannot acquire the system time information of the access device, the UE may also select to perform time synchronization according to a network time service manner or a satellite time service manner, which has flexibility.
With reference to the second aspect of the present application, in a second implementation manner of the second aspect of the present application, before the UE determines whether to acquire the system time information sent by the corresponding access network device within a preset period, the method further includes: the UE judges whether the GNSS carried by the UE is available or not; and if the UE determines that the GNSS carried by the UE is unavailable, the UE executes a step of judging whether to acquire the system time information sent by the corresponding access network equipment in a preset period.
In the foregoing embodiment of the present application, if the UE is provided with a GNSS, the UE may first determine whether the GNSS provided by the UE is available, and if the GNSS provided by the UE is not available (for example, in an indoor scenario), the UE may select to perform the step of determining whether to acquire the system time information sent by the corresponding access network device within a preset period, which is specifically flexible.
With reference to the second implementation manner of the second aspect of the present application, in a third implementation manner of the second aspect of the present application, if the UE does not acquire the system time information within a preset period, the UE further performs time synchronization according to a network time service manner.
In the above embodiments of the present application, in different scenarios, the UE may select different timing manners for timing, which provides more flexibility.
With reference to the second aspect of the present application and the first to third embodiments of the second aspect of the present application, in the fourth embodiment of the second aspect of the present application, the system time information may include year, month, day, hour, minute, second, millisecond, and microsecond, the system time information may also include year, month, day, hour, minute, second, and millisecond, the system time information may also include year, month, day, hour, minute, second, and microsecond, and specifically, information specifically included in the system time information here is not limited, and is determined by the accuracy required by the UE.
In the above embodiments of the present application, it is stated that what the system time information may specifically include is determined by the precision required by the UE whether the system time information is to include microseconds and/or milliseconds, and flexibility is provided.
With reference to the second aspect of the present application and the first to fourth embodiments of the second aspect of the present application, in a fifth embodiment of the second aspect of the present application, the provided time service method of the communication system may be applied to various communication networks, for example, may be applied to a 5G communication network, and may also be applied to future communication networks, for example, a 6G network, a 7G network, and the like, and the related network element name/device name is not limited, and may be replaced by a network element name/device name having the same or similar function in the future communication network, and the present application is not limited, for example, the communication system may be a 5G communication system, and an access network device in the 5G communication system may be a 5G base station.
In the above embodiments of the present application, it is explained that the related communication system is a 5G communication system, and the corresponding access network device is a 5G base station, which has practicability.
A third aspect of an embodiment of the present application further provides an access network device, which has a function of implementing the method in the first aspect or any one of the possible implementation manners of the first aspect. The function 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.
A fourth aspect of the embodiments of the present application further provides a UE having a function of implementing the method according to any one of the second aspect and the second possible implementation manner. The function 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.
A fifth aspect of the embodiments of the present application further provides an access network device, which may include: the system comprises a memory, a processor and a bus system, wherein the memory and the processor are connected through the bus system; wherein the memory is used for storing programs and instructions; the processor is configured to call the instructions stored in the memory to execute the method in the first aspect of the embodiment of the present application and any one of the possible implementation manners of the first aspect.
The sixth aspect of the present embodiment also provides a UE, which may include: the system comprises a memory, a processor and a bus system, wherein the memory and the processor are connected through the bus system; wherein the memory is used for storing programs and instructions; the processor is configured to call the instructions stored in the memory to execute the method in the second aspect of the embodiment of the present application and any one of the possible implementations of the second aspect.
A seventh aspect of the present embodiment provides a communication system, where the communication system includes an access network device and a UE, where the access network device may be the control device provided in the third aspect or the fifth aspect of the present embodiment, and the UE may be the UE provided in the fourth aspect or the sixth aspect of the present embodiment.
An eighth aspect of embodiments of the present application provides a computer-readable storage medium, which stores instructions that, when executed on a computer, enable the computer to perform the method of any one of the above-mentioned first aspect (or second aspect) and possible implementation manners of the first aspect (or second aspect).
A ninth aspect of embodiments of the present application provides a computer program product containing instructions, which when run on a computer, enables the computer to perform the method of any one of the above-mentioned first aspect (or second aspect) and possible implementation manners of the first aspect (or second aspect).
According to the technical scheme, the embodiment of the application has the following advantages: firstly, the access network device (e.g., 5G base station) acquires the UTC high-precision reference time, and determines the system time information of the access network device according to the UTC high-precision reference time (e.g., the 5G base station acquires the UTC high-precision reference time from a time reference source such as GNSS or 1588V2 synchronization), and the access network device periodically transmits the acquired system time information to the corresponding UE, so that the UE can perform time synchronization according to the system time information of the access network device. In the embodiment of the present application, a communication system (e.g., a 5G system) requires time synchronization of the whole network, and the accuracy of basic service synchronization is required to be ± 1.5 microseconds (relative to UTC), so that the system time information of the access network device is used as the source of the system time of the UE, which not only has no limitation on the use scenario, but also greatly shortens the time service path, thereby improving the time service accuracy.
Drawings
FIG. 1 is a diagram illustrating a UE acquiring time from a GNSS enabled to be self-contained;
FIG. 2 is a schematic diagram of two ways of network time service;
FIG. 3 is a schematic diagram of a time service method of a communication system according to an embodiment of the present application;
FIG. 4 is a schematic diagram of an access network device;
FIG. 5 is a diagram of a UE;
fig. 6 is a schematic diagram of a related apparatus.
Detailed Description
The embodiment of the application provides a time service method of a communication system, which is used for taking system time information of access network equipment (such as a 5G base station) as a source of system time of UE (user equipment), so that a use scene is not limited, a time service path is greatly shortened, and the time service precision is improved.
Before describing the present embodiment, concepts that may appear in the embodiments of the present application are first described. It should be understood that the related conceptual explanations may be limited by the specific details of the embodiments of the present application, but do not mean that the present application is limited to the specific details, and that the specific details of the embodiments may vary from one embodiment to another, and are not limited herein.
NITZ: network identification and time zone, is a mechanism for automatically configuring local time and date, while also providing operator information to mobile devices (e.g., UEs) over the wireless network. NITZ is an optional function. The NITZ is defined in 3GPP TS 24.501 in detail and is not described herein. It should be noted that NITZ is a message between a Universal Service Node (USN) and the UE, and the access network device directly passes the message to the UE without performing special processing.
NTP: is a time synchronization protocol for time-service to terminals via the internet. The network node can be obtained by connecting terminal data service to an NTP server, and can also be obtained by connecting Wireless-Fidelity (WiFi) to the NTP server.
GNSS: the Global Navigation Satellite System specifically includes four Global Satellite systems, i.e., a Global Positioning System (GPS) in the united states, a BeiDou Navigation Satellite System (BDS), a GLONASS Satellite Navigation System (GLONASS), and a Galileo Satellite Navigation System (Galileo). Global satellite navigation systems have been used in various industries, such as: in the embodiment of the present application, mainly based on the time service function, as shown in fig. 1, if a UE (taking a mobile phone as an example) has a GNSS, the mobile phone supports time acquisition from the own GNSS (e.g., GPS).
1588V2 clock: the 1588V2 clock is a high-precision clock adopting IEEE 1588V2 protocol. The IEEE 1588 protocol is called as "precision clock synchronization protocol standard of a network measurement and control system", and is a general specification for improving the timing synchronization capability of a network system, so that a distributed communication network can have strict timing synchronization. The basic idea is to synchronize the internal clock of the network device (client) with the master clock of the master controller by hardware and software, providing the use of synchronization setup time less than 10 microseconds. The IEEE 1588 protocol is currently developed to a V2 version (namely 1588V2 clock), which is perfect for 1588V1 clock and improves the synchronization precision.
The time service method of the communication system provided in the embodiment of the present application may be applied to various communication networks, for example, may be applied to a 5G communication network, and may also be applied to future communication networks, for example, a 6G network, a 7G network, and the like, and the name of the related network element/device is not limited, and may be replaced by the name of the network element/device having the same or similar function in the future communication network, and the application is not limited, for example, an access network device in the 5G communication system is a 5G base station.
At present, a time service method adopted by a UE generally includes network time service and satellite time service, where a satellite time service mode is shown in fig. 1, and as long as the UE has a GNSS, the UE can support the GNSS to acquire time, but this mode is limited to a use scenario, that is, a scenario applicability is poor, and time can be acquired only when the GNSS of the UE is available (for example, the GNSS of the UE cannot be used in an indoor scenario). If a network time service mode is adopted, two modes are available: a. using the NITZ acquisition time; b. time is obtained from the NTP server. As shown in fig. 2, the priority of the general time service is: the UE preferentially acquires time from the NITZ of the USN (that is, as shown in fig. 2, the USN directly transmits the NITZ from the access network device to the UE by using the network), and if the UE does not acquire time from the USN, the UE can further acquire time from the NTP server, but the path through which the UE acquires time by using the NTP server is long (as shown in fig. 2, the time needs to pass through the NTP server, the network, and the base station to be transmitted to the UE), and the transmission path has various delays, so that the time service accuracy is not high, and the networks of different operators are different, the delays are different, and there is a difference of 1s to 2 s.
Based on this, to solve the above-mentioned problem, an embodiment of the present application provides a time service method for a communication system, and refer to fig. 3 specifically:
301. and the access network equipment acquires the UTC high-precision reference time.
First, the access network device (e.g., a 5G base station) may directly obtain the time of the UTC high-precision reference time, for example, the access network device may obtain the UTC high-precision reference time from a GNSS time reference source, and the access network device may also obtain the UTC high-precision reference time from a time reference source of a 1588V2 clock, which is not limited herein.
302. And the access network equipment determines system time information according to the UTC high-precision reference time.
And then, the access network equipment can determine the system time information of the access network equipment according to the acquired UTC high-precision reference time. Because communication systems such as a 5G system and the like require time synchronization of the whole network, and the accuracy of basic service synchronization is required to be within +/-1.5 microseconds (relative UTC), the system time information accuracy of the access network equipment is high.
303. The access network equipment periodically sends system time information to the UE.
The access network device may periodically update the system time information, and send the updated system time information to the corresponding UE according to a preset period (e.g., 5 minutes, 10 minutes, etc.).
304. And the UE judges whether to acquire system time information in a preset period.
At the UE side, it is determined whether to acquire the corresponding system time information within a preset period, for example, it may be determined whether to acquire the system time information once within 5 minutes.
It should be noted that, in some embodiments of the present application, the system time information may include year, month, day, hour, minute, second, millisecond, and microsecond, the system time information may also include year, month, day, hour, minute, second, and millisecond, the system time information may also include year, month, day, hour, minute, second, and microsecond, and the specific included information of the system time information is not limited and is determined by the accuracy required by the UE.
305. And if so, the UE carries out time synchronization according to the system time information.
If the UE determines that the system time information sent by the corresponding access network device is obtained within the preset period, the UE may perform time synchronization according to the system time information, that is, the system time of the access network device is used as the system time of the UE.
Preferably, in some embodiments of the present application, if the UE does not acquire the system time information within the preset period (e.g., the access network device does not send the system time information to the UE), the UE may perform time synchronization according to the network time service manner (e.g., using a NITZ to acquire time or using an NTP server to acquire time) or the satellite time service manner (e.g., a scenario where a GNSS of the UE itself is available).
Preferably, in some embodiments of the present application, if the UE is equipped with a GNSS, the UE may first determine whether the GNSS of the UE is available, and if the GNSS of the UE is available (e.g., in an outdoor scenario), the time service manner may also be that the UE performs time service by using the GNSS of the UE itself first, and if the GNSS of the UE is unavailable (e.g., in an indoor scenario), the UE may select to perform the step of determining whether to acquire the system time information sent by the corresponding access network device within a preset period. It should be noted that, in this embodiment, if the UE does not acquire the system time information within a preset period, the UE performs timing further according to a network timing mode. Therefore, in different scenes, the UE can select different time service modes for time service, and the flexibility is better achieved.
In the above embodiments of the present application, the communication systems such as the 5G system require time synchronization of the whole network, and the accuracy of basic service synchronization is required to be ± 1.5 microseconds (relative UTC), so that the system time information of the access network device (e.g., the 5G base station) is used as the source of the system time of the UE, which not only has no limitation on the usage scenario, but also greatly shortens the time service path, thereby improving the accuracy of time service.
In the embodiment of the present application, according to the example of the time service method of the communication system, functional modules of related devices of the communication system may be divided, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.
For example, fig. 4 shows a schematic diagram of an access network device, and the access network device provided in an embodiment of the present application may include:
an obtaining module 401, configured to obtain coordinated universal time UTC high-precision reference time;
a determining module 402, configured to determine system time information according to the UTC high-precision reference time;
a sending module 403, configured to periodically send the system time information to a corresponding UE, so that the UE performs time synchronization according to the system time information.
Preferably, in some embodiments of the present application, the obtaining module 401 is specifically configured to:
and acquiring the UTC high-precision reference time from a time reference source of a global navigation satellite system GNSS or a 1588V2 clock.
Preferably, in some embodiments of the present application, the system time information includes:
year, month, day, hour, minute, second, millisecond, and microsecond; or, year, month, day, hour, minute, second, and millisecond; or, year, month, day, hour, minute, second, and microsecond.
Preferably, in some embodiments of the present application, the access network device includes: and 5G base stations.
The specific functions and structures of the access network device in the embodiment corresponding to fig. 4 are used to implement the steps processed by the access network device in the embodiment corresponding to fig. 3, and details are not repeated here.
In addition, fig. 5 also shows a schematic diagram of a UE, where the UE provided in the embodiment of the present application may include:
a determining module 501, configured to determine whether system time information sent by a corresponding access network device is acquired within a preset period, where the system time information is determined by the access network device according to the acquired UTC high-precision reference time;
the time synchronization module 502 is configured to perform time synchronization according to the system time information if the UE does not acquire the system time information in the preset period.
Preferably, in some embodiments of the present application, the time setting module 502 is further configured to:
and if the UE does not acquire the system time information in the preset period, carrying out time synchronization according to a network time service mode or a satellite time service mode.
Preferably, in some embodiments of the present application, the determining module 501 is further configured to:
judging whether the GNSS carried by the user equipment is available;
and if the GNSS is determined to be unavailable, judging whether the system time information sent by the corresponding access network equipment is acquired in a preset period.
Preferably, in some embodiments of the present application, the time setting module 502 is further configured to:
and if the UE does not acquire the system time information in the preset period, timing according to a network time service mode.
Preferably, in some embodiments of the present application, the system time information includes:
year, month, day, hour, minute, second, millisecond, and microsecond; or, year, month, day, hour, minute, second, and millisecond; or, year, month, day, hour, minute, second, and microsecond.
Preferably, in some embodiments of the present application, the access network device includes: and 5G base stations.
The specific functions and structures of the UE in the embodiment corresponding to fig. 5 are used to implement the steps processed by the UE in the embodiment corresponding to fig. 3, and are not repeated here.
Fig. 6 is another schematic diagram of a device (which may be an access network device or a UE) according to an embodiment of the present application, and for convenience of description, only a portion related to the embodiment of the present application is shown, and details of the technology are not disclosed, please refer to a method portion of the embodiment of the present application. The apparatus 600 may vary widely in configuration or performance and may include one or more Central Processing Units (CPUs) 622 (e.g., one or more processors) and memory 632, one or more storage media 630 (e.g., one or more mass storage devices) storing applications 642 or data 644. Memory 632 and storage medium 630 may be, among other things, transient or persistent storage. The program stored in the storage medium 630 may include one or more modules (not shown), each of which may include a series of instruction operations for the server. Still further, the central processor 622 may be configured to communicate with the storage medium 630 to execute a series of instruction operations in the storage medium 630 on the device 600.
The apparatus 600 may also include one or more power supplies 626, one or more wired or wireless network interfaces 650, one or more input-output interfaces 658, and/or one or more operating systems 641, such as Windows Server, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, and so forth.
The steps executed by the access network device in the embodiment corresponding to fig. 3 may be implemented based on the structure shown in fig. 6, and the steps executed by the UE in the embodiment corresponding to fig. 3 may also be implemented based on the structure shown in fig. 6, which is not limited herein.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.
The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium. The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk), among others.
Claims (25)
1. A time service method of a communication system is characterized by comprising the following steps:
the access network equipment acquires coordinated universal time UTC high-precision reference time;
the access network equipment determines system time information according to the UTC high-precision reference time;
and the access network equipment periodically sends the system time information to corresponding User Equipment (UE) so that the UE carries out time synchronization according to the system time information.
2. The method of claim 1, wherein the obtaining, by the access network device, a coordinated universal time, UTC, high precision reference time comprises:
and the access network equipment acquires the UTC high-precision reference time from a time reference source of a global navigation satellite system GNSS or a 1588V2 clock.
3. The method according to any of claims 1-2, wherein the system time information comprises:
year, month, day, hour, minute, second, millisecond, and microsecond;
or the like, or, alternatively,
year, month, day, hour, minute, second, and millisecond;
or the like, or, alternatively,
year, month, day, hour, minute, second, and microsecond.
4. The method according to any one of claims 1 to 3,
the communication system includes: a 5G communication system;
the access network device includes: and 5G base stations.
5. A time service method of a communication system is characterized in that,
the UE judges whether system time information sent by corresponding access network equipment is acquired in a preset period or not, and the system time information is determined by the access network equipment according to the acquired UTC high-precision reference time;
and if so, the UE carries out time synchronization according to the system time information.
6. The method of claim 5, further comprising:
and if the UE does not acquire the system time information in the preset period, the UE performs time synchronization according to a network time service mode or a satellite time service mode.
7. The method according to claim 5, wherein before the UE determines whether to acquire the system time information sent by the corresponding access network device within a preset period, the method further comprises:
the UE judges whether the GNSS carried by the UE is available or not;
and if the UE determines that the GNSS of the UE is unavailable, the UE executes a step of judging whether to acquire the system time information sent by the corresponding access network equipment in a preset period.
8. The method of claim 7, further comprising:
and if the UE does not acquire the system time information in the preset period, the UE synchronizes time according to a network time service mode.
9. The method according to any of claims 5-8, wherein the system time information comprises:
year, month, day, hour, minute, second, millisecond, and microsecond;
or the like, or, alternatively,
year, month, day, hour, minute, second, and millisecond;
or the like, or, alternatively,
year, month, day, hour, minute, second, and microsecond.
10. The method according to any one of claims 5 to 9,
the communication system includes: a 5G communication system;
the access network device includes: and 5G base stations.
11. An access network device, comprising:
the acquisition module is used for acquiring coordinated universal time UTC high-precision reference time;
the determining module is used for determining system time information according to the UTC high-precision reference time;
and the sending module is used for periodically sending the system time information to corresponding User Equipment (UE) so that the UE carries out time synchronization according to the system time information.
12. The access network device of claim 11, wherein the obtaining module is specifically configured to:
and acquiring the UTC high-precision reference time from a time reference source of a global navigation satellite system GNSS or a 1588V2 clock.
13. An access network device according to any one of claims 11-12, wherein the system time information comprises:
year, month, day, hour, minute, second, millisecond, and microsecond;
or the like, or, alternatively,
year, month, day, hour, minute, second, and millisecond;
or the like, or, alternatively,
year, month, day, hour, minute, second, and microsecond.
14. An access network device according to any one of claims 11-13, characterized in that the access network device comprises: and 5G base stations.
15. A UE, characterized in that,
the system comprises a judging module and a judging module, wherein the judging module is used for judging whether system time information sent by corresponding access network equipment is acquired in a preset period or not, and the system time information is determined by the access network equipment according to the acquired UTC high-precision reference time;
and the time synchronization module is used for performing time synchronization according to the system time information if the UE does not acquire the system time information in the preset period.
16. The UE of claim 15, wherein the time synchronization module is further configured to:
and if the UE does not acquire the system time information in the preset period, carrying out time synchronization according to a network time service mode or a satellite time service mode.
17. The UE of claim 15, wherein the determining module is further configured to:
judging whether the GNSS carried by the user equipment is available;
and if the GNSS is determined to be unavailable, judging whether the system time information sent by the corresponding access network equipment is acquired in a preset period.
18. The UE of claim 17, wherein the time synchronization module is further configured to:
and if the UE does not acquire the system time information in the preset period, timing according to a network time service mode.
19. The UE of any of claims 15-18, wherein the system time information comprises:
year, month, day, hour, minute, second, millisecond, and microsecond;
or the like, or, alternatively,
year, month, day, hour, minute, second, and millisecond;
or the like, or, alternatively,
year, month, day, hour, minute, second, and microsecond.
20. The UE of any of claims 15-19, wherein the access network device comprises: and 5G base stations.
21. An access network device, comprising: a processor and a memory;
the memory is used for storing programs;
the processor is configured to execute the program to implement the method according to any one of claims 1-4.
22. A UE, comprising: a processor and a memory;
the memory is used for storing programs;
the processor is configured to execute the program to implement the method according to any one of claims 5-10.
23. A communication system, comprising: access network equipment and a UE;
the access network equipment, configured to implement the method according to any one of claims 1 to 4;
the UE configured to implement the method according to any one of claims 5-10.
24. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1-10.
25. A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1-10.
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| CN201911261572.4A CN112953668A (en) | 2019-12-10 | 2019-12-10 | Time service method of communication system and related equipment |
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| WO2023207719A1 (en) * | 2022-04-25 | 2023-11-02 | 华为技术有限公司 | Clock synchronization method and apparatus |
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