CN112770382A - LoRa gateway, method, device and medium for realizing time synchronization of LoRa gateway - Google Patents
LoRa gateway, method, device and medium for realizing time synchronization of LoRa gateway Download PDFInfo
- Publication number
- CN112770382A CN112770382A CN201911001013.XA CN201911001013A CN112770382A CN 112770382 A CN112770382 A CN 112770382A CN 201911001013 A CN201911001013 A CN 201911001013A CN 112770382 A CN112770382 A CN 112770382A
- Authority
- CN
- China
- Prior art keywords
- time information
- module
- lora gateway
- time
- lora
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000004891 communication Methods 0.000 claims abstract description 103
- 238000005516 engineering process Methods 0.000 claims description 24
- 238000012790 confirmation Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000002085 persistent effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002355 dual-layer Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
-
- 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
- H04J3/0644—External master-clock
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
An LoRa gateway, a method, a device and a medium for realizing time synchronization of the LoRa gateway are disclosed. The LoRa gateway includes: the communication module is used for connecting with the first equipment and receiving a message which is sent by the first equipment and comprises first time information; and a synchronization module for performing time synchronization based on the first time information. For example, the first device may be a base station, and the communication module may transmit a heartbeat packet to the communication base station and receive acknowledgement information transmitted by the communication base station for the heartbeat packet, where the acknowledgement information includes the first time information. Therefore, the problem that the time synchronization cannot be carried out due to the fact that the LoRa gateway cannot receive the GPS signals (for example, when the LoRa gateway is deployed indoors) can be solved.
Description
Technical Field
The present disclosure relates to the field of communications, and in particular, to an LoRa gateway, and a method, an apparatus, and a medium for implementing time synchronization in the LoRa gateway.
Background
LoRa (abbreviation for Long Range) is a low power consumption Long distance wireless standard, and is one of low power consumption wide area network (LPWAN) technologies. The LoRa gateway is a device used for receiving the radio frequency signals of the LoRa nodes and converting the received LoRa protocol information into an upper layer protocol. The LoRa gateway ensures the uplink and downlink synchronization of the system by adopting the PPS (pulse per second) pulse of the GPS and acquired astronomical time, which requires the time precision of the GPS to reach above us. Due to the obstruction of buildings, the indoor GPS signals are poor, and time synchronization cannot be performed on the basis of this method for the base station installed indoors.
Therefore, a solution to the problem that the indoor LoRa gateway cannot perform time synchronization is needed.
Disclosure of Invention
An object of the present disclosure is to provide a scheme capable of supporting time synchronization of an LoRa gateway located indoors.
According to a first aspect of the present disclosure, a LoRa gateway is provided, including: the communication module is used for sending a heartbeat packet to the communication base station and receiving confirmation information sent by the communication base station aiming at the heartbeat packet, wherein the confirmation information comprises first time information; and a synchronization module for performing time synchronization based on the first time information.
Optionally, the LoRa gateway further includes: and the satellite navigation module is used for acquiring the second time information.
Optionally, the synchronization module performs time synchronization based on the second time information when the satellite navigation module acquires the second time information, or performs time synchronization based on the first time information and the second time information when the satellite navigation module fails to acquire the second time information.
Optionally, the communication module is a GPRS module.
Optionally, the LoRa gateway further includes: and the sending module is used for periodically sending the beacon frame.
According to a second aspect of the present disclosure, there is also provided an LoRa gateway, including: the communication module is used for connecting with first equipment and receiving a message which is sent by the first equipment and comprises first time information; and a synchronization module for performing time synchronization based on the first time information.
Optionally, the LoRa gateway further includes: and the satellite navigation module is used for acquiring the second time information.
Optionally, when the satellite navigation module acquires the second time information, the synchronization module performs time synchronization based on the second time information, or the synchronization module performs time synchronization based on the first time information and the second time information, and when the satellite navigation module fails to acquire the second time information, the synchronization module performs time synchronization based on the first time information.
Optionally, the communication module comprises: a first communication module for receiving the message by a wireless local area network technology; and/or the second communication module sends the heartbeat packet through a second generation communication technology; and/or a third communication module, which sends the heartbeat packet through a third generation communication technology; and/or a fourth communication module, which sends the heartbeat packet through a fourth generation communication technology; and/or the fourth communication module sends the heartbeat packet through a general packet radio service technology.
Optionally, the LoRa gateway further includes: and the control module is used for selecting the communication module to be put into use.
According to a third aspect of the present disclosure, there is also provided a LoRa network, including: a plurality of LoRa gateways, a plurality of LoRa gateways are used for sending the beacon frame in step, exist at least some LoRa gateways in a plurality of LoRa gateways and be the LoRa gateway that this first aspect of this disclosure or second aspect said.
According to a fourth aspect of the present disclosure, there is also provided a method for implementing time synchronization by an LoRa gateway, including: sending a heartbeat packet to a communication base station through a communication module; receiving confirmation information sent by the communication base station for the heartbeat packet through the communication module, wherein the confirmation information comprises first time information; and performing time synchronization based on the first time information.
Optionally, the method further comprises: and acquiring second time information through the satellite navigation module, wherein time synchronization is performed based on the second time information or based on the first time information and the second time information when the satellite navigation module acquires the second time information, and time synchronization is performed based on the first time information when the satellite navigation module fails to acquire the second time information.
Optionally, the communication module is a GPRS module.
According to a fifth aspect of the present disclosure, there is also provided a method for implementing time synchronization by an LoRa gateway, including: connecting with a first device through a communication module; receiving a message including first time information sent by the first device through a communication module; and performing time synchronization based on the first time information.
According to a sixth aspect of the present disclosure, there is also presented a computing device comprising: a processor; and a memory having executable code stored thereon, which when executed by the processor, causes the processor to perform a method as set forth in the third or fourth aspect of the disclosure.
According to a seventh aspect of the present disclosure, there is also presented a non-transitory machine-readable storage medium having stored thereon executable code, which when executed by a processor of an electronic device, causes the processor to perform a method as set forth in the third or fourth aspect of the present disclosure.
In the exemplary embodiment of the present disclosure, the synchronization is performed by using the time information acquired from the communication base station, so that the problem that the LoRa gateway cannot perform time synchronization indoors due to weak GPS signals can be solved, and the problem that the indoor LoRa gateway cannot support ClassB due to the fact that the time synchronization cannot be performed can be solved.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in greater detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
Fig. 1 shows a schematic structural diagram of an LoRa gateway according to an embodiment of the present disclosure.
Fig. 2 shows a schematic diagram of an indoor LoRa gateway communicating with an outdoor communication base station according to an embodiment of the present disclosure.
FIG. 3 shows a schematic structural diagram of a computing device according to an embodiment of the present disclosure.
Detailed Description
Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In order to enable the LoRa gateway to achieve time synchronization even when the LoRa gateway cannot receive GPS signals or the received GPS signals are weak (for example, when the LoRa gateway is located indoors), the disclosure proposes that a communication module provided in the LoRa gateway may be used to connect with another device (which may be referred to as a first device for convenience of distinction) and receive a message including time information sent by the first device, so that the LoRa gateway can perform time synchronization based on the time information.
As an example, the communication module may employ a GPRS module, and the DTU heartbeat packet of the GPRS module may be used to replace the PPS second pulse of the GPS. On one hand, in order to maintain the link with the communication base station, the GPRS module can regularly send heartbeat packets to the communication base station so as to obtain confirmation information of the communication base station, wherein the confirmation information contains time information, and the time information is accurate time of the communication base station and can reach the us level; on the other hand, the system uplink and downlink time synchronization can be completed by using the heartbeat acknowledgement packet acquisition time of the GPRS under the condition that no GPS signal exists, namely, the indoor LoRa gateway, even though the GPRS signal exists indoors or outdoors. Therefore, the problem that the LoRa gateway cannot perform time synchronization indoors due to weak GPS signals can be solved.
Based on the above concept, the present disclosure proposes a new LoRa gateway.
Fig. 1 shows a schematic structural diagram of an LoRa gateway according to an embodiment of the present disclosure.
Referring to fig. 1, the LoRa gateway 100 includes a communication module 110 and a synchronization module 120.
The communication module 110 may be configured to connect with a first device and receive a message including time information (for convenience of distinction, may be referred to as first time information) sent by the first device. The first time information mentioned here refers to the current time that can be used for time synchronization by the LoRa gateway, and the first device may be any form of party that can transmit the time information to the communication module 110.
The synchronization module 120 may perform time synchronization based on the first time information. The time synchronization mentioned here is to adjust the local clock of the LoRa gateway according to the first time information, so that the local clock is consistent with the time scale represented by the first time information.
The communication module 110 may establish a wireless connection with the first device by using wireless communication technologies such as but not limited to a wireless local area network technology (e.g., Wi-Fi), a second generation communication technology (i.e., GSM), a third generation communication technology (i.e., 3G), a fourth generation communication technology (i.e., 4G), a packet radio service technology (i.e., GPRS), and the like, or may establish a wired connection with the first device by using wired methods such as but not limited to an optical cable, a cable, and the like.
By way of example, the communication module may include, but is not limited to, any one or more of a first communication module, a second communication module, a third communication module, and a fourth communication module. The first communication module is used for receiving messages through a wireless local area network technology; the second communication module receives the message through a second generation communication technology; the third communication module receives the message through a third generation communication technology; the fourth communication module receives the message through a fourth generation communication technology; the fourth communication module receives the message via general packet radio service technology.
The type of communication module employed by the LoRa gateway 100 may be determined as desired. For example, an appropriate communication module may be selected according to the equipment cost and the requirement of the service scenario on the communication quality. As an example, in the case where the LoRa gateway 100 includes a plurality of communication modules, the LoRa gateway 100 may further include a control module for selecting a communication module to be put into use.
Taking the communication module 110 to implement communication based on the packet radio service technology (i.e., GPRS), the first device may refer to a communication base station, and the communication module 110 may be, but is not limited to, a GPRS module (i.e., GPRS DTU). The GPRS module is an internet of things wireless data terminal and can provide wireless long-distance data transmission function for users by utilizing a public operator network. As described above, in order to maintain the link with the communication base station, the GPRS module periodically sends a heartbeat packet to the communication base station, so as to obtain the acknowledgement information returned by the communication base station, where the acknowledgement information includes the first time information capable of representing the accurate time of the communication base station.
As shown in fig. 2, when the LoRa gateway is located indoors, time information may be acquired from an external communication base station for synchronization. That is, whether the LoRa gateway is located indoors or outdoors, the communication module 110 may receive a signal transmitted by a nearby communication base station. Therefore, by using the time information acquired from the communication base station, the problem that the LoRa gateway cannot perform time synchronization indoors due to weak GPS signals and cannot perform time synchronization indoors due to other unavailable GPS signals can be solved.
As shown in fig. 1, the LoRa gateway 100 may further include a satellite navigation module 130, and the time information (for convenience of distinguishing, may be referred to as second time information) may also be acquired by the satellite navigation module 130. The second time information may refer to a time determined based on a GPS PPS-second pulse.
As an example, in the case that the satellite navigation module 130 can acquire the second time information, the synchronization module 120 may perform time synchronization based on the second time information, or the synchronization module 120 may also perform time synchronization based on the first time information and the second time information, for example, the first time information may be calibrated based on the second time information, and the time synchronization may be performed based on the calibrated time. In the case where the satellite navigation module 130 fails to acquire the second time information, the synchronization module 120 may perform time synchronization based on the first time information.
As shown in fig. 1, the LoRa gateway 100 may further include a sending module 140.
In the LoRaWAN protocol, the operation modes of the LoRa node are divided into three types: ClassA, ClassB and ClassC. ClassA is the most basic mode, and both ClassB and ClassC are compatible with the ClassA mode. All LoRa gateways in a network supporting ClassB must send Beacon frames (Beacon) synchronously. In other words, the LoRa gateway transmits the beacon frame on the premise that time synchronization can be achieved.
As described above, the present disclosure can solve the problem that time synchronization cannot be performed indoors in the LoRa gateway, and thus, the present disclosure can simultaneously solve the problem that the LoRa gateway cannot support ClassB indoors due to the inability to synchronize. That is, for the LoRa gateway 100 located indoors, the beacon frame may be periodically transmitted through the transmitting module 140, and the transmitted beacon frame does not cause a collision due to time asynchronization.
The disclosure also provides a LoRa network supporting ClassB, including a plurality of LoRa gateways, the plurality of LoRa gateways are used for synchronously transmitting beacon frames. Wherein there may be at least some of the plurality of LoRa gateways as the LoRa gateway described above in connection with fig. 1. For the structure of the LoRa gateway, reference may be made to the description above in conjunction with fig. 1, and details are not repeated here. The LoRa network may further include one or more LoRa nodes.
In other words, some LoRa gateways in the LoRa network may be provided with communication modules, and some LoRa gateways may not be provided with communication modules.
Specifically, according to the location information of the LoRa gateway, a part of the LoRa gateways are uniformly selected from all the LoRa gateways forming the LoRa network, and the LoRa gateway structure is set. In addition, the number and the distribution condition of the LoRa gateways adopting the scheme can be set according to actual service requirements.
The present disclosure further provides a method for implementing time synchronization by an LoRa gateway, including: sending a heartbeat packet to a communication base station through a communication module; receiving confirmation information sent by the communication base station for the heartbeat packet through the communication module, wherein the confirmation information comprises first time information; and performing time synchronization based on the first time information. For details related to the method, see the above description, and are not repeated herein.
The present disclosure further provides a method for implementing time synchronization by an LoRa gateway, including: connecting with a first device through a communication module; receiving a message including first time information sent by first equipment through a communication module; time synchronization is performed based on the first time information. For details related to the method, see the above description, and are not repeated herein.
Fig. 3 is a schematic structural diagram of a computing device that can be used to implement the above method for implementing time synchronization by an LoRa gateway according to an embodiment of the present invention.
Referring to fig. 3, computing device 300 includes memory 310 and processor 320.
Processor 320 may be a multi-core processor or may include multiple processors. In some embodiments, processor 320 may include a general-purpose host processor and one or more special coprocessors such as a Graphics Processor (GPU), a Digital Signal Processor (DSP), or the like. In some embodiments, processor 320 may be implemented using custom circuitry, such as an Application Specific Integrated Circuit (ASIC) or a Field Programmable Gate Array (FPGA).
The memory 310 may include various types of storage units, such as system memory, Read Only Memory (ROM), and permanent storage. Wherein the ROM may store static data or instructions for the processor 320 or other modules of the computer. The persistent storage device may be a read-write storage device. The persistent storage may be a non-volatile storage device that does not lose stored instructions and data even after the computer is powered off. In some embodiments, the persistent storage device employs a mass storage device (e.g., magnetic or optical disk, flash memory) as the persistent storage device. In other embodiments, the permanent storage may be a removable storage device (e.g., floppy disk, optical drive). The system memory may be a read-write memory device or a volatile read-write memory device, such as a dynamic random access memory. The system memory may store instructions and data that some or all of the processors require at runtime. Further, the memory 310 may comprise any combination of computer-readable storage media, including various types of semiconductor memory chips (DRAM, SRAM, SDRAM, flash memory, programmable read-only memory), magnetic and/or optical disks, may also be employed. In some embodiments, memory 310 may include a removable storage device that is readable and/or writable, such as a Compact Disc (CD), a read-only digital versatile disc (e.g., DVD-ROM, dual layer DVD-ROM), a read-only Blu-ray disc, an ultra-density optical disc, a flash memory card (e.g., SD card, min SD card, Micro-SD card, etc.), a magnetic floppy disc, or the like. Computer-readable storage media do not contain carrier waves or transitory electronic signals transmitted by wireless or wired means.
The memory 310 has stored thereon executable code that, when processed by the processor 320, may cause the processor 320 to perform the above-mentioned method for implementing time synchronization by the LoRa gateway.
The LoRa gateway, the method for implementing time synchronization by the LoRa gateway, the LoRa network, and the computing device according to the present invention have been described in detail above with reference to the accompanying drawings.
Furthermore, the method according to the invention may also be implemented as a computer program or computer program product comprising computer program code instructions for carrying out the above-mentioned steps defined in the above-mentioned method of the invention.
Alternatively, the invention may also be embodied as a non-transitory machine-readable storage medium (or computer-readable storage medium, or machine-readable storage medium) having stored thereon executable code (or a computer program, or computer instruction code) which, when executed by a processor of an electronic device (or computing device, server, etc.), causes the processor to perform the steps of the above-described method according to the invention.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the disclosure herein may be implemented as electronic hardware, computer software, or combinations of both.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems and methods according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (17)
1. An LoRa gateway, comprising:
the communication module is used for sending a heartbeat packet to a communication base station and receiving confirmation information sent by the communication base station aiming at the heartbeat packet, wherein the confirmation information comprises first time information; and
and the synchronization module is used for carrying out time synchronization based on the first time information.
2. The LoRa gateway of claim 1, further comprising:
and the satellite navigation module is used for acquiring the second time information.
3. The LoRa gateway of claim 2,
the synchronization module performs time synchronization based on the second time information in a case where the satellite navigation module acquires the second time information, or the synchronization module performs time synchronization based on the first time information and the second time information,
the synchronization module performs time synchronization based on the first time information in a case where the satellite navigation module fails to acquire the second time information.
4. The LoRa gateway of claim 1, wherein the communication module is a GPRS module.
5. The LoRa gateway of claim 1, further comprising:
and the sending module is used for periodically sending the beacon frame.
6. An LoRa gateway, comprising:
the communication module is used for connecting with first equipment and receiving a message which is sent by the first equipment and comprises first time information; and
and the synchronization module is used for carrying out time synchronization based on the first time information.
7. The LoRa gateway of claim 6, further comprising:
and the satellite navigation module is used for acquiring the second time information.
8. The LoRa gateway of claim 7,
the synchronization module performs time synchronization based on the second time information in a case where the satellite navigation module acquires the second time information, or the synchronization module performs time synchronization based on the first time information and the second time information,
the synchronization module performs time synchronization based on the first time information in a case where the satellite navigation module fails to acquire the second time information.
9. The LoRa gateway of claim 6, wherein the communication module comprises:
a first communication module for receiving the message by a wireless local area network technology; and/or
The second communication module receives the message through a second generation communication technology; and/or
The third communication module receives the message through a third generation communication technology; and/or
The fourth communication module receives the message through a fourth generation communication technology; and/or
A fourth communication module that receives the message via general packet radio service technology.
10. The LoRa gateway of claim 9, further comprising:
and the control module is used for selecting the communication module to be put into use.
11. An LoRa network, comprising: a plurality of LoRa gateways, the plurality of LoRa gateways are used for sending beacon frames synchronously, and at least some LoRa gateways exist in the plurality of LoRa gateways are the LoRa gateway in any one of claims 1 to 10.
12. A method for realizing time synchronization of an LoRa gateway is characterized by comprising the following steps:
sending a heartbeat packet to a communication base station through a communication module;
receiving, by the communication module, acknowledgement information sent by the communication base station for the heartbeat packet, where the acknowledgement information includes first time information; and
and performing time synchronization based on the first time information.
13. The method of claim 12, further comprising:
second time information is acquired by the satellite navigation module, wherein,
performing time synchronization based on the second time information or performing time synchronization based on the first time information and the second time information in a case where the second time information is acquired by the satellite navigation module,
and under the condition that the satellite navigation module cannot acquire the second time information, performing time synchronization based on the first time information.
14. The method of claim 12, wherein the communication module is a GPRS module.
15. A method for realizing time synchronization of an LoRa gateway is characterized by comprising the following steps:
connecting with a first device through a communication module;
receiving a message including first time information sent by the first device through a communication module;
and performing time synchronization based on the first time information.
16. A computing device, comprising:
a processor; and
a memory having executable code stored thereon which, when executed by the processor, causes the processor to perform the method of any of claims 12 to 15.
17. A non-transitory machine-readable storage medium having stored thereon executable code, which when executed by a processor of an electronic device, causes the processor to perform the method of any of claims 12-15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911001013.XA CN112770382A (en) | 2019-10-21 | 2019-10-21 | LoRa gateway, method, device and medium for realizing time synchronization of LoRa gateway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911001013.XA CN112770382A (en) | 2019-10-21 | 2019-10-21 | LoRa gateway, method, device and medium for realizing time synchronization of LoRa gateway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112770382A true CN112770382A (en) | 2021-05-07 |
Family
ID=75691586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911001013.XA Pending CN112770382A (en) | 2019-10-21 | 2019-10-21 | LoRa gateway, method, device and medium for realizing time synchronization of LoRa gateway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112770382A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866830A (en) * | 2005-07-29 | 2006-11-22 | 华为技术有限公司 | Method for realizing media gateway synchronization in communication system |
| CN101132222A (en) * | 2006-08-22 | 2008-02-27 | 上海贝尔阿尔卡特股份有限公司 | Gateway equipment, base station equipment, communication network and synchronization method |
| CN102056285A (en) * | 2011-01-18 | 2011-05-11 | 大唐移动通信设备有限公司 | Clock synchronization method, system and equipment |
| US20130154877A1 (en) * | 2011-12-14 | 2013-06-20 | Samsung Electronics Co., Ltd. | Wireless communication system and time synchronization method thereof |
| CN105453667B (en) * | 2014-06-30 | 2019-05-28 | 华为技术有限公司 | A clock synchronization method, system and related device |
-
2019
- 2019-10-21 CN CN201911001013.XA patent/CN112770382A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866830A (en) * | 2005-07-29 | 2006-11-22 | 华为技术有限公司 | Method for realizing media gateway synchronization in communication system |
| CN101132222A (en) * | 2006-08-22 | 2008-02-27 | 上海贝尔阿尔卡特股份有限公司 | Gateway equipment, base station equipment, communication network and synchronization method |
| CN102056285A (en) * | 2011-01-18 | 2011-05-11 | 大唐移动通信设备有限公司 | Clock synchronization method, system and equipment |
| US20130154877A1 (en) * | 2011-12-14 | 2013-06-20 | Samsung Electronics Co., Ltd. | Wireless communication system and time synchronization method thereof |
| CN105453667B (en) * | 2014-06-30 | 2019-05-28 | 华为技术有限公司 | A clock synchronization method, system and related device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113169795B (en) | Adaptation of physical layer procedures for mobile RAN in non-terrestrial networks | |
| ES2745756T3 (en) | Method and apparatus for generating a location reference signal in a communication system using a multiple transmitter antenna configuration | |
| US9942714B2 (en) | Method and apparatus for selecting a positioning scheme, method and apparatus for controlling a positioning scheme to be selected | |
| KR101676309B1 (en) | Method for acquiring positioning information | |
| WO2019062337A1 (en) | Observed time difference of arrival (otdoa) positioning in wireless communication networks | |
| WO2021004233A1 (en) | Satellite communication method and apparatus, terminal device, satellite, and readable storage medium | |
| CN107046461A (en) | V2X Terminal Time-Frequency Synchronization Transmission and Reception Processing Method and Device | |
| JP2023537375A (en) | Communication method and communication device | |
| US20230397161A1 (en) | Access offset determination in conjunction with paging in non-terrestrial networks | |
| US20220182914A1 (en) | Method and apparatus for tracking area update in non-terrestrial network | |
| US20230108216A1 (en) | Wireless communication method, terminal device and network device | |
| US20250247820A1 (en) | Method for positioning, terminal device, and network device | |
| CN110730496A (en) | Synchronization method and terminal equipment | |
| CN115004786A (en) | Method, apparatus and system for determining the location of a mobile device | |
| CN116349160A (en) | Earth fixed cell ID for non-terrestrial networks | |
| US20240188026A1 (en) | Selective reporting of tracking area identity to core network in non-terrestrial networks | |
| EP4161170A1 (en) | Reducing contention by improving the identification of the target of a response signal | |
| WO2023102710A1 (en) | Communication method, terminal device, and network device | |
| HK40051248A (en) | Lora gateway, method for realizing time synchronization by the lora gateway, equipment and medium | |
| CN112770382A (en) | LoRa gateway, method, device and medium for realizing time synchronization of LoRa gateway | |
| EP2749061B1 (en) | Method and apparatuses for initialising a radio base station | |
| CN116324512A (en) | GNSS measurement method, device, equipment and storage medium | |
| CN111641937A (en) | Communication system, first node, gateway, network server and time synchronization method | |
| CN114760682B (en) | A method, device and equipment for transmitting time information | |
| CN116782360A (en) | A method and device for determining timing advance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 40051248 Country of ref document: HK |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210507 |