CN114828198A - Synchronous clock compensation method, device, equipment and readable storage medium - Google Patents
Synchronous clock compensation method, device, equipment and readable storage medium Download PDFInfo
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Abstract
The embodiment of the application provides a synchronous clock compensation method, a synchronous clock compensation device, synchronous clock compensation equipment and a readable storage medium, wherein the method comprises the following steps: determining a first path, wherein the first path represents a path for a terminal to interact with a base station through an IRS; determining compensation information of a synchronous clock of the terminal according to the first path and a second path, wherein the second path is a path through which the terminal directly interacts with the base station; and sending the compensation information of the synchronous clock to the terminal. In the embodiment of the application, the time delay can be accurately compensated, and the time delay of lengthening a propagation path caused by the extension of a coverage range when the IRS is deployed is overcome; furthermore, after the IRS link is identified, link compensation can be performed on the link, so that the robustness of link detection is improved, and the control flow of the base station and the terminal is simplified.
Description
Technical Field
The embodiment of the application relates to the technical field of communication, in particular to a synchronous clock compensation method, a synchronous clock compensation device, synchronous clock compensation equipment and a readable storage medium for an Intelligent Reflection Surface (IRS) system.
Background
The IRS is a novel intelligent passive surface, and the phase of the surface is controlled in real time by utilizing metamaterials (Meta-materials), so that the reflection angle of incident waves is controlled, and reflection beams in different directions are formed.
The intelligent reflector has the characteristics of low cost and low power consumption, so that the intelligent reflector can realize signal forwarding without a complex Radio Frequency (RF) circuit.
The terminal may transmit signals directly from the IRS. Obviously, the wireless transmission path between the terminal and the base station is no longer a direct path, but a path refracted by the IRS, which is equivalent to that the transmission path between the terminal and the base station is lengthened, which directly affects the length of the Guard Period (GP) of the uplink and downlink transition point and the synchronization compensation of the clock.
Currently, in a fifth Generation mobile communication (5th-Generation, 5G) system, a slot (slot) direction is determined by defining an Uplink (UL) or Downlink (DL) direction of each Symbol (Symbol), and a variable Symbol (flexible Symbol) is introduced, so that the direction of the variable Symbol can be flexibly configured as an uplink or downlink direction as required.
After the IRS is introduced, a transmission path between the terminal and the base station is lengthened, but the distance between the terminal and the base station cannot be determined according to the antenna coverage range of the base station due to the existence of the IRS in a measurement mechanism between the terminal and the base station, so that the compensation information of the synchronous clock of the terminal cannot be determined.
Disclosure of Invention
An object of the embodiments of the present application is to provide a method, an apparatus, a device, and a readable storage medium for compensating a synchronous clock, which solve the problem that compensation information of a synchronous clock of a terminal cannot be determined.
The embodiment of the application provides a synchronous clock compensation method, which is executed by a base station and comprises the following steps:
determining a first path, wherein the first path represents a path for a terminal to interact with a base station through an IRS;
determining compensation information of a synchronous clock of the terminal according to the first path and a second path, wherein the second path is a path through which the terminal directly interacts with the base station;
and sending the compensation information of the synchronous clock to the terminal.
Optionally, the method further comprises:
and if the terminal is determined to interact with the base station through the IRS, executing the step of determining the first path.
Optionally, the method further comprises:
and if the received RNTI comprises the RNTI of the IRS, determining that the terminal interacts with the base station through the IRS.
Optionally, the sending the compensation information of the synchronous clock to the terminal includes:
and transmitting the compensation information of the synchronous clock to the terminal through the MAC CE or the downlink control information DCI.
Optionally, the first path includes: a third path and a fourth path, where the third path is a path when the base station interacts with the IRS; the fourth path is a path where the IRS interacts with the terminal.
Optionally, the determining the first path includes:
determining the third path by measuring the IRS;
determining the fourth path according to the third path, the second path and the included angle between the third path and the second path;
and determining the first path according to the third path and the fourth path.
Optionally, the method further comprises:
determining a first distance between a specific position in the coverage range of the base station and the base station;
subtracting the length of a second path of the terminal at the specific position from the length of the third path to obtain a first difference value;
adding the first difference to the length of the second path to obtain a second distance;
determining that the TAC and/or GP for the specific location needs to be compensated if the second distance is greater than the first distance.
Optionally, the method further comprises:
subtracting the first distance from the second distance to obtain a second difference value;
and obtaining a compensation value for performing TAC and/or GP compensation according to the second difference and the time granularity of the communication system.
Optionally, for the compensation of the GP, performing compensation for the symbol according to the minimum granularity, and increasing one or more symbols each time;
and compensating the TAC by compensating one or more time slots according to the precision specified by the protocol.
Optionally, the specific location comprises one or more of:
a position within the coverage of the base station furthest from the base station;
a position within the coverage area of the base station closest to the base station;
and the position farthest from the IRS within the coverage range of the base station.
Optionally, the third path comprises one or more of:
a path for interaction between the base station and the antenna unit closest to the base station in the IRS;
a path for interaction between the base station and an antenna unit in the IRS, which is farthest from the base station;
a path for interaction between the base station and the antenna unit at the central point of the IRS;
alternatively, the first and second electrodes may be,
the fourth path comprises one or more of:
a path for interaction between an antenna unit on the IRS closest to the base station and a terminal in the coverage area of the IRS closest to the base station;
the path of interaction between the antenna unit farthest from the base station on the IRS and the terminal farthest from the base station in the coverage area of the IRS;
and the antenna unit at the central point on the IRS interacts with the terminal which is farthest away from the IRS in the coverage range of the IRS.
Optionally, the second path comprises one or more of:
a path through which a terminal closest to the base station within the coverage area of the IRS directly interacts with the base station;
a path through which a terminal farthest from the base station within the coverage area of the IRS directly interacts with the base station;
and a path directly interacting between a terminal farthest from the IRS and the base station within the coverage area of the IRS.
Optionally, the method further comprises:
receiving one or more of the following reported by the IRS or configured by an operation and maintenance system:
information of the antenna unit closest to the base station;
information of the antenna unit farthest from the base station;
information in the closest proximity to the base station within the coverage of the IRS;
information farthest from the base station within the coverage of the IRS;
the IRS covers information farthest from the IRS.
In a second aspect, a synchronous clock compensation method is provided, which is performed by a terminal and includes:
receiving compensation information of a synchronous clock, wherein the compensation information of the synchronous clock is a path which is determined according to a first path and a second path, the first path represents a path for a terminal to interact with a base station through an IRS, and the second path is a path for the terminal to directly interact with the base station;
and carrying out synchronous compensation according to the compensation information of the synchronous clock.
Optionally, performing synchronization compensation according to the compensation information of the synchronous clock, including:
if the compensation information of the synchronous clock comprises: TA, updating the clock of air interface synchronization;
if the compensation information of the synchronous clock comprises: and the GP determines the symbol for receiving the downlink signal or sending the uplink signal according to the symbol occupied by the GP.
Optionally, the receiving compensation information of the synchronous clock includes:
the compensation information of the synchronization clock is received through the MAC CE or the DCI.
Optionally, the first path includes: a third path and a fourth path, where the third path is a path when the base station interacts with the IRS; the fourth path is a path where the IRS interacts with the terminal.
Optionally, the third path comprises one or more of:
a path for interaction between the base station and an antenna unit closest to the base station in the IRS;
a path for interaction between the base station and an antenna unit in the IRS, which is farthest from the base station;
a path for interaction between the base station and the antenna unit at the central point of the IRS;
alternatively, the first and second electrodes may be,
the fourth path comprises one or more of:
a path for interaction between an antenna unit closest to the base station on the IRS and a terminal closest to the base station within the coverage of the IRS;
the path of interaction between the antenna unit farthest from the base station on the IRS and the terminal farthest from the base station in the coverage area of the IRS;
and the antenna unit at the central point on the IRS interacts with the terminal which is farthest away from the IRS in the coverage range of the IRS.
Optionally, the second path comprises one or more of:
a path through which a terminal closest to the base station within the coverage area of the IRS directly interacts with the base station;
a path through which a terminal farthest from the base station within the coverage area of the IRS directly interacts with the base station;
and a path directly interacting between a terminal farthest from the IRS and the base station within the coverage area of the IRS.
In a third aspect, a synchronization compensation apparatus is provided, including:
a first determining module, configured to determine a first path, where the first path indicates a path where a terminal interacts with a base station through an IRS;
a second determining module, configured to determine compensation information of a synchronous clock of the terminal according to the first path and a second path, where the second path is a path where the terminal and the base station directly interact with each other;
and the first sending module is used for sending the compensation information of the synchronous clock to the terminal.
In a fourth aspect, a synchronization compensation apparatus is provided, including:
a first receiving module, configured to receive compensation information of a synchronous clock, where the compensation information of the synchronous clock is a path through which a terminal interacts with a base station through an IRS according to a first path and a second path, and the second path is a path through which the terminal directly interacts with the base station;
and the processing module is used for carrying out synchronous compensation according to the compensation information of the synchronous clock.
In a fifth aspect, a network-side device is provided, including: a processor, a memory and a program stored on the memory and executable on the processor, which program, when executed by the processor, carries out the steps of the method according to the first aspect.
In a sixth aspect, a terminal is provided, including: a processor, a memory and a program stored on the memory and executable on the processor, the program, when executed by the processor, implementing the steps of the method according to the second aspect.
In a seventh aspect, a readable storage medium is provided, which is characterized by a program stored thereon, and when executed by a processor, the program realizes the steps comprising the method according to the first aspect or the second aspect.
In the embodiment of the application, the time delay can be accurately compensated, and the time delay of lengthening a propagation path caused by the extension of a coverage range when the IRS is deployed is overcome; furthermore, after the IRS link is identified, link compensation can be performed on the link, so that the robustness of link detection is improved, and the control flow of the base station and the terminal is simplified.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a block diagram of a wireless communication system to which embodiments of the present application are applicable;
FIG. 2 is a flowchart of a synchronous clock compensation method according to an embodiment of the present application;
FIG. 3 is a second flowchart of a synchronous clock compensation method according to an embodiment of the present application;
FIG. 4 is a schematic diagram illustrating a relationship between a base station antenna and an IRS coverage area in an embodiment of the present application;
FIG. 5 is a schematic diagram of a synchronous compensator according to an embodiment of the present application;
FIG. 6 is a second schematic diagram of a synchronous compensation device according to the present application;
FIG. 7 is a schematic diagram of a base station according to an embodiment of the present application;
fig. 8 is a schematic diagram of a terminal according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.
In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, but may also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described techniques can be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. However, the following description describes a New Radio (NR) system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications, such as 6th Generation (6G) communication systems.
Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11, a network-side device 12, and an IRS 13. Wherein, the terminal 11 may also be called as a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palmtop Computer, a netbook, a super-Mobile Personal Computer (UMPC), a Mobile Internet Device (MID), a Wearable Device (Wearable Device) or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and other terminal side devices, the Wearable Device includes: bracelets, earphones, glasses and the like. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network-side device 12 may be a Base Station or a core network, where the Base Station may be referred to as a node B, an evolved node B, an access Point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a WLAN access Point, a WiFi node, a Transmit Receiving Point (TRP), or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that, in the embodiment of the present application, only the Base Station in the NR system is taken as an example, but a specific type of the Base Station is not limited.
Referring to fig. 2, an embodiment of the present application provides a synchronous clock compensation method, which is executed by a base station, and includes: step 201, step 202 and step 203.
Step 201: determining a first path, wherein the first path represents a path for a terminal to interact with a base station through an IRS;
it should be noted that the Intelligent Reflecting Surface (IRS) is also referred to as: intelligent Supersurface (RIS), both identical.
Step 202: determining compensation information of a synchronous clock of the terminal according to the first path and a second path, wherein the second path is a path through which the terminal directly interacts with the base station;
step 203: and sending the compensation information of the synchronous clock to the terminal.
In an embodiment of the present application, the method further includes:
and if the terminal is determined to interact with the base station through the IRS, executing the step of determining the first path.
In an embodiment of the present application, the method further includes:
and if a Radio Network Temporary Identity (RNTI) including the RNTI of the IRS is received, determining that the terminal interacts with the base station through the IRS.
In this embodiment of the present application, the sending the compensation information of the synchronous clock to the terminal includes:
and transmitting the compensation Information of the synchronization clock to the terminal through a Media Access Control (MAC) Control Element (CE) or Downlink Control Information (DCI).
In an embodiment of the present application, the first path includes: a third path and a fourth path, where the third path is a path when the base station interacts with the IRS; the fourth path is a path where the IRS interacts with the terminal.
In an embodiment of the present application, the determining the first path includes:
determining the third path by measuring the IRS;
determining the fourth path according to the third path, the second path and the included angle between the third path and the second path;
and determining the first path according to the third path and the fourth path.
In an embodiment of the present application, the method further includes:
determining a first distance between a specific position in the coverage area of the base station and the base station;
subtracting the length of a second path of the terminal at the specific position from the length of the third path to obtain a first difference value;
adding the first difference to the length of the second path to obtain a second distance;
determining that compensation is required for a Timing Advance Command (TAC) and/or a GP for the specific location if the second distance is greater than the first distance.
In an embodiment of the present application, the method further includes:
subtracting the first distance from the second distance to obtain a second difference value;
and obtaining a compensation value for performing TAC and/or GP compensation according to the second difference and the time granularity of the communication system.
In the embodiment of the application, for the compensation of the GP, the compensation is performed according to the minimum granularity as a symbol, and one or more symbols are added each time;
and compensating the TAC by compensating one or more time slots according to the precision specified by the protocol.
In embodiments of the application, the specific location comprises one or more of:
a position within the coverage of the base station furthest from the base station;
a position within the coverage area of the base station closest to the base station;
and the position which is farthest from the IRS in the coverage range of the base station.
In an embodiment of the present application, the third path comprises one or more of:
a path for interaction between the base station and the antenna unit closest to the base station in the IRS;
a path for interaction between the base station and an antenna unit in the IRS, which is farthest from the base station;
path for interaction between base station and antenna unit at central point of IRS
Alternatively, the first and second electrodes may be,
the fourth path comprises one or more of:
a path for interaction between an antenna unit closest to the base station on the IRS and a terminal closest to the base station within the coverage of the IRS;
the path of interaction between the antenna unit farthest from the base station on the IRS and the terminal farthest from the base station in the coverage area of the IRS;
and the antenna unit at the central point on the IRS interacts with the terminal which is farthest away from the IRS in the coverage range of the IRS.
In an embodiment of the application, the second path comprises one or more of:
a path through which a terminal closest to the base station within the coverage area of the IRS directly interacts with the base station;
a path through which a terminal farthest from the base station within the coverage area of the IRS directly interacts with the base station;
and a path directly interacting between a terminal farthest from the IRS and the base station within the coverage area of the IRS.
In an embodiment of the present application, the method further includes:
receiving one or more of the following reported by the IRS or configured by an operation and maintenance system:
information of the antenna unit closest to the base station;
information of the antenna unit farthest from the base station;
information in the closest proximity to the base station within the coverage of the IRS;
information farthest from the base station within the coverage of the IRS;
the IRS covers information farthest from the IRS.
In the embodiment of the application, the time delay can be accurately compensated, and the time delay of lengthening a propagation path caused by the extension of a coverage range when the IRS is deployed is overcome; furthermore, after the IRS link is identified, link compensation can be performed on the link, so that the robustness of link detection is improved, and the control flow of the base station and the terminal is simplified.
Referring to fig. 3, an embodiment of the present application provides a synchronous clock compensation method, which is executed by a terminal and includes: step 301 and step 302.
Step 301: receiving compensation information of a synchronous clock, wherein the compensation information of the synchronous clock is a path which is determined according to a first path and a second path, the first path represents a path for a terminal to interact with a base station through an IRS, and the second path is a path for the terminal to directly interact with the base station;
step 302: and carrying out synchronous compensation according to the compensation information of the synchronous clock.
In this embodiment of the present application, performing synchronous compensation according to the compensation information of the synchronous clock includes:
if the compensation information of the synchronous clock comprises: TA, updating the clock of air interface synchronization;
if the compensation information of the synchronous clock comprises: and the GP determines the symbol for receiving the downlink signal or sending the uplink signal according to the symbol occupied by the GP.
In this embodiment of the present application, the receiving compensation information of the synchronous clock includes:
the compensation information of the synchronization clock is received through the MAC CE or the DCI.
In an embodiment of the present application, the first path includes: a third path and a fourth path, where the third path is a path when the base station interacts with the IRS; the fourth path is a path where the IRS interacts with the terminal.
In an embodiment of the present application, the third path comprises one or more of:
a path for interaction between the base station and the antenna unit closest to the base station in the IRS;
a path for interaction between the base station and an antenna unit in the IRS, which is farthest from the base station;
path for interaction between base station and antenna unit at central point of IRS
Alternatively, the first and second electrodes may be,
the fourth path comprises one or more of:
a path for interaction between an antenna unit closest to the base station on the IRS and a terminal closest to the base station within the coverage of the IRS;
the path of interaction between the antenna unit farthest from the base station on the IRS and the terminal farthest from the base station in the coverage area of the IRS;
and the antenna unit at the central point on the IRS interacts with the terminal which is farthest away from the IRS in the coverage range of the IRS.
In an embodiment of the application, the second path comprises one or more of:
a path through which a terminal closest to the base station within the coverage area of the IRS directly interacts with the base station;
a path through which a terminal farthest from the base station within the coverage area of the IRS directly interacts with the base station;
and a path directly interacting between a terminal farthest from the IRS and the base station within the coverage area of the IRS.
In the embodiment of the application, the time delay can be accurately compensated, and the time delay of lengthening a propagation path caused by the extension of a coverage range when the IRS is deployed is overcome; furthermore, after the IRS link is identified, link compensation can be performed on the link, so that the robustness of link detection is improved, and the control flow of the base station and the terminal is simplified.
Referring to fig. 4, a closest point to the base station in the coverage area of the IRS is denoted as a-UE, a farthest point from the base station is denoted as B-UE, and a point farthest from the IRS in the coverage area is denoted as C-UE.
The base station and the radio frequency unit on the IRS, which is farthest from the base station and closest to the base station, form a triangle with the farthest point, the closest point and the farthest point from the IRS of the coverage surface.
Taking the A-UE point as an example:
the three sides la, lb, lc form a triangle. Delta l ═ l (la + lc-lb). lb is the direct viewing distance between the UE and the base station, and is the distance used by the current base station when setting TAC and GP.
According to the trigonometric function relationship:
lc 2 ＝la 2 +lb 2 -2la*lb*cosx。
wherein x is the included angle between la and lb.
Lc can be obtained and Delta l is calculated.
When the IRS performs handshake with the base station or accesses the base station, it needs to:
1. measuring the distance between the IRS center point and the base station, and recording the distance between the IRS center point and the base station by the base station;
2. and the IRS reports the distance between the antenna unit closest to the base station and the antenna unit farthest from the base station to the base station.
The distance lengths of the nearest antenna element and the farthest antenna element from the IRS of the base station are respectively expressed in terms of the straight-line distances from the base station. Optionally, the linear distance may be manually measured when the IRS is installed, and then input to the IRS, and the linear distance is reported to the base station by the IRS, or may be uniformly modeled in an operation and maintenance system of the base station, and then configured to the base station by the operation and maintenance system.
3. The IRS calculates the area that the IRS can cover according to its adjustable maximum and minimum elevation angles and according to its height from the ground, and gets the farthest point, the closest point and the farthest point from the IRS in the coverage area, it is understood that the distances are expressed in horizontal distance from the base station.
The farthest point in the coverage area from the base station in fig. 4 is B-UE, the closest point in the coverage area from the base station is a-UE, and the farthest point in the coverage area from the IRS is C-UE. The IRS reports the farthest point, the closest point and the farthest point from the IRS to the base station.
4. The base station obtains the distances of the antenna unit from the farthest point, the closest point and the farthest point from the IRS, i.e. the length of lb in fig. 4, respectively, according to the height of the antenna. This length can be calculated directly from the base station antenna tilt angle, the antenna height, the horizontal distance of the three points to the base station.
5. When the IRS is installed, the included angle of the closest point, namely the included angle of la and lb in fig. 4, can be manually measured. Then IRS reports to base station.
And secondly, the base station obtains delta l of the farthest point, the nearest point and the farthest point away from the IRS according to the formula. And the base station obtains the closest point, the widest point and the farthest point of the coverage range of the base station according to the radius of the coverage cell when the base station is deployed. L is obtained by judging the distance from the farthest point, the closest point and the farthest point (i.e. A-UE, B-UE and C-UE in FIG. 4) covered by the IRS to the base station and adding Delta L to the distance to the base station A ，L B And L C Comparing the sizes of the closest point, the widest point and the farthest point of the coverage area of the base station respectively, if L exists A ，L B And L C One of which is larger than one of the three values, respectively, the TAC and GP at the corresponding positions need to be compensated, respectively, and the compensated value is a difference value (L) A ，L B And L C The difference calculated after one of the values is greater than the corresponding one of the three values) divided by the 5G system time granularity Ts. If the three values are less than the corresponding three values, respectively, no compensation is required. For GP compensation, compensation is performed in terms of minimum granularity-symbols (symbols), adding one or several symbols at a time. And compensating the TAC by one or more according to the precision specified by the protocol.
After the IRS is deployed, when the UE interacts with the base station through the IRS (distinguished through the allocated IRS-RNTI), the compensation scheme is started; when the UE does not interact with the base station via the IRS, no compensation is performed. The MAC of the base station can be determined by the RNTI (IRS-RNTI indicates IRS passed; normal RNTI indicates IRS failed).
Air interface control flow:
when the TA and GP needs to be adjusted, the base station transmits to the terminal through the MAC CE or using DCI.
When the terminal receives DCI carried by a corresponding MAC CE or a Physical Downlink Control Channel (PDCCH), if the DCI is TA, the terminal updates the clock synchronized at the air interface. If the GP is the GP, the Symbol for receiving the downlink signal or transmitting the uplink signal is determined according to the Symbol (Symbol) occupied by the GP appointed by the network side.
Referring to fig. 5, an embodiment of the present application provides a synchronization compensation apparatus, where the apparatus 500 includes:
a first determining module 501, configured to determine a first path, where the first path represents a path where a terminal interacts with a base station through an IRS;
a second determining module 502, configured to determine compensation information of a synchronous clock of the terminal according to the first path and a second path, where the second path is a path where the terminal and the base station directly interact with each other;
a first sending module 503, configured to send compensation information of the synchronous clock to the terminal.
In the embodiment of the present application, the apparatus 500 further includes:
and a second determining module, configured to execute the step of determining the first path if it is determined that the terminal interacts with the base station through the IRS.
In an embodiment of the application, the second determining module is further configured to: and if the received RNTI comprises the RNTI of the IRS, determining that the terminal interacts with the base station through the IRS.
In this embodiment of the present application, the first sending module 503 is further configured to: and transmitting the compensation information of the synchronous clock to the terminal through the MAC CE or the DCI.
In an embodiment of the present application, the first path includes: a third path and a fourth path, where the third path is a path when the base station interacts with the IRS, and the fourth path is a path when the IRS interacts with the terminal.
In an embodiment of the present application, the first determining module 501 is further configured to: determining the third path by measuring the IRS; determining the fourth path according to the third path, the second path and the included angle between the third path and the second path; and determining the first path according to the third path and the fourth path.
In the embodiment of the present application, the apparatus 500 further includes:
a third determining module, configured to determine a first distance between a specific location within a coverage area of the base station and the base station; subtracting the length of a second path of the terminal at the specific position from the length of the third path to obtain a first difference value; adding the first difference to the length of the second path to obtain a second distance; determining that compensation for the TAC and/or GP at the particular location is required if the second distance is greater than the first distance.
In the embodiment of the present application, the apparatus 500 further includes:
a fourth determining module, configured to subtract the first distance from the second distance to obtain a second difference;
and the fifth determining module is used for obtaining a compensation value for performing TAC and/or GP compensation according to the second difference value and the time granularity of the communication system.
In the embodiment of the application, for the compensation of the GP, the compensation is performed according to the minimum granularity as a symbol, and one or more symbols are added each time;
and compensating the TAC by compensating one or more time slots according to the precision specified by the protocol.
In embodiments of the application, the specific location comprises one or more of:
a position within the coverage of the base station furthest from the base station;
a position within the coverage area of the base station closest to the base station;
and the position which is farthest from the IRS in the coverage range of the base station.
In an embodiment of the present application, the third path comprises one or more of:
a path for interaction between the base station and the antenna unit closest to the base station in the IRS;
a path for interaction between the base station and an antenna unit in the IRS, which is farthest from the base station;
path for interaction between base station and antenna unit at central point of IRS
Alternatively, the first and second electrodes may be,
the fourth path comprises one or more of:
a path for interaction between an antenna unit closest to the base station on the IRS and a terminal closest to the base station within the coverage of the IRS;
the path of interaction between the antenna unit farthest from the base station on the IRS and the terminal farthest from the base station in the coverage area of the IRS;
and the antenna unit at the central point on the IRS interacts with the terminal which is farthest away from the IRS in the coverage range of the IRS.
In an embodiment of the application, the second path comprises one or more of:
a path through which a terminal closest to the base station within the coverage area of the IRS directly interacts with the base station;
a path through which a terminal farthest from the base station within the coverage area of the IRS directly interacts with the base station;
and a path for directly interacting the terminal farthest from the IRS and the base station in the coverage range of the IRS.
The device provided in the embodiment of the present application can implement each process implemented by the method embodiment shown in fig. 2, and achieve the same technical effect, and for avoiding repetition, details are not described here again.
Referring to fig. 6, an embodiment of the present application provides a synchronization compensation apparatus, where the apparatus 600 includes:
a first receiving module 601, configured to receive compensation information of a synchronous clock, where the compensation information of the synchronous clock is a path that indicates that a terminal interacts with a base station through an IRS according to a first path and a second path, and the second path is a path where the terminal directly interacts with the base station;
and the processing module 602 is configured to perform synchronization compensation according to the compensation information of the synchronous clock.
In an embodiment of the present application, the processing module 602 is further configured to: if the compensation information of the synchronous clock comprises: TA, updating the clock of air interface synchronization; if the compensation information of the synchronous clock comprises: and the GP determines the symbol for receiving the downlink signal or sending the uplink signal according to the symbol occupied by the GP.
In this embodiment, the first receiving module 601 is further configured to: the compensation information of the synchronization clock is received through the MAC CE or the DCI.
In an embodiment of the present application, the first path includes: a third path and a fourth path, where the third path is a path when the base station interacts with the IRS; the fourth path is a path where the IRS interacts with the terminal.
In an embodiment of the present application, the third path comprises one or more of:
a path for interaction between the base station and the antenna unit closest to the base station in the IRS;
a path for interaction between the base station and an antenna unit in the IRS, which is farthest from the base station;
path for interaction between base station and antenna unit at central point of IRS
Alternatively, the first and second electrodes may be,
the fourth path comprises one or more of:
a path for interaction between an antenna unit closest to the base station on the IRS and a terminal closest to the base station within the coverage of the IRS;
the path of interaction between the antenna unit farthest from the base station on the IRS and the terminal farthest from the base station in the coverage area of the IRS;
and the antenna unit at the central point on the IRS interacts with the terminal which is farthest away from the IRS in the coverage range of the IRS.
In an embodiment of the application, the second path comprises one or more of:
a path through which a terminal closest to the base station within the coverage area of the IRS directly interacts with the base station;
a path through which a terminal farthest from the base station within the coverage area of the IRS directly interacts with the base station;
and a path directly interacting between a terminal farthest from the IRS and the base station within the coverage area of the IRS.
The device provided in the embodiment of the present application can implement each process implemented in the method embodiment shown in fig. 3, and achieve the same technical effect, and is not described here again to avoid repetition.
The embodiment of the application also provides network side equipment. As shown in fig. 7, the network-side device 700 includes: antenna 701, radio frequency device 702, baseband device 703. The antenna 701 is connected to a radio frequency device 702. In the uplink direction, the rf device 702 receives information through the antenna 701, and sends the received information to the baseband device 703 for processing. In the downlink direction, the baseband device 703 processes information to be transmitted and transmits the information to the radio frequency device 702, and the radio frequency device 702 processes the received information and transmits the processed information through the antenna 701.
The above-mentioned band processing apparatus may be located in the baseband apparatus 703, and the method performed by the network side device in the above embodiment may be implemented in the baseband apparatus 703, where the baseband apparatus 703 includes a processor 704 and a memory 705.
The baseband apparatus 703 may include, for example, at least one baseband board, on which a plurality of chips are disposed, as shown in fig. 7, where one of the chips, for example, the processor 704, is connected to the memory 705 to call up the program in the memory 705, so as to perform the network device operations shown in the above method embodiments.
The baseband device 703 may further include a network interface 706, such as a Common Public Radio Interface (CPRI), for exchanging information with the radio frequency device 702.
Specifically, the network side device of the embodiment of the present invention further includes: the instructions or programs stored in the memory 705 and capable of being executed on the processor 704, and the processor 704 calls the instructions or programs in the memory 705 to execute the method executed by each module shown in fig. 5, and achieve the same technical effect, and are not described herein in detail to avoid repetition.
The network side device provided in the embodiment of the present application can implement each process implemented by the method embodiment shown in fig. 2, and achieve the same technical effect, and for avoiding repetition, details are not described here again.
Fig. 8 is a schematic hardware structure diagram of a terminal for implementing an embodiment of the present application, where the terminal 800 includes, but is not limited to: a radio frequency unit 801, a network module 802, an audio output unit 803, an input unit 804, a sensor 805, a display unit 806, a user input unit 807, an interface unit 808, a memory 809, and a processor 810.
Those skilled in the art will appreciate that the terminal 800 may further include a power supply (e.g., a battery) for supplying power to various components, and the power supply may be logically connected to the processor 810 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system. The terminal structure shown in fig. 8 does not constitute a limitation of the terminal, and the terminal may include more or less components than those shown, or combine some components, or have a different arrangement of components, and thus will not be described again.
It should be understood that in the embodiment of the present application, the input Unit 804 may include a Graphics Processing Unit (GPU) 8041 and a microphone 8042, and the Graphics Processing Unit 8041 processes image data of a still picture or a video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 806 may include a display panel 8061, and the display panel 8061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 807 includes a touch panel 8071 and other input devices 8072. A touch panel 8071, also referred to as a touch screen. The touch panel 8071 may include two portions of a touch detection device and a touch controller. Other input devices 8072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.
In the embodiment of the present application, the radio frequency unit 801 receives downlink data from a network side device, and then processes the downlink data to the processor 810; in addition, the uplink data is sent to the network side equipment. In general, radio frequency unit 801 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
The terminal provided in the embodiment of the present application can implement each process implemented by the method embodiment shown in fig. 3, and achieve the same technical effect, and for avoiding repetition, details are not described here again.
An embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the method embodiment shown in fig. 2 or fig. 3, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.
The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or may be embodied in software instructions executed by a processor. The software instructions may consist of corresponding software modules that may be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, a removable hard disk, a compact disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may be carried in a core network interface device. Of course, the processor and the storage medium may reside as discrete components in a core network interface device.
Those skilled in the art will recognize that in one or more of the examples described above, the functions described herein may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
The above-mentioned embodiments, objects, technical solutions and advantages of the present application are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present application, and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present application should be included in the scope of the present application.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications can be made in the embodiments of the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.
Claims (24)
1. A method of synchronous clock compensation, performed by a base station, comprising:
determining a first path, wherein the first path represents a path for interaction between a terminal and a base station through an intelligent reflector plate IRS;
determining compensation information of a synchronous clock of the terminal according to the first path and a second path, wherein the second path is a path through which the terminal directly interacts with the base station;
and sending the compensation information of the synchronous clock to the terminal.
2. The method of claim 1, further comprising:
and if the terminal is determined to interact with the base station through the IRS, executing the step of determining the first path.
3. The method of claim 2, further comprising:
and if the received radio network temporary identifier RNTI comprises the RNTI of the IRS, determining that the terminal interacts with the base station through the IRS.
4. The method of claim 1, wherein the sending the compensation information of the synchronous clock to the terminal comprises:
and transmitting the compensation information of the synchronous clock to the terminal through a media access control (MAC CE) or Downlink Control Information (DCI).
5. The method of claim 1, wherein the first path comprises: a third path and a fourth path, where the third path is a path when the base station interacts with the IRS; the fourth path is a path where the IRS interacts with the terminal.
6. The method of claim 5, wherein determining the first path comprises:
determining the third path by measuring the IRS;
determining the fourth path according to the third path, the second path and the included angle between the third path and the second path;
and determining the first path according to the third path and the fourth path.
7. The method of claim 5, further comprising:
determining a first distance between a specific position in the coverage area of the base station and the base station;
subtracting the length of a second path of the terminal at the specific position from the length of the third path to obtain a first difference value;
adding the first difference to the length of the second path to obtain a second distance;
and if the second distance is greater than the first distance, determining that the timing advance TAC and/or the protection period GP at the specific position need to be compensated.
8. The method of claim 7, further comprising:
subtracting the first distance from the second distance to obtain a second difference value;
and obtaining a compensation value for performing TAC and/or GP compensation according to the second difference and the time granularity of the communication system.
9. The method according to claim 7, characterized in that for the compensation of the GP, the symbols are compensated with a minimum granularity, one or more symbols at a time;
and compensating the TAC by compensating one or more time slots according to the precision specified by the protocol.
10. The method of claim 7, wherein the particular location comprises one or more of:
a position within the coverage of the base station furthest from the base station;
a position within the coverage area of the base station closest to the base station;
and the position which is farthest from the IRS in the coverage range of the base station.
11. The method of claim 6, wherein the third path comprises one or more of:
a path for interaction between the base station and the antenna unit closest to the base station in the IRS;
a path for interaction between the base station and an antenna unit in the IRS, which is farthest from the base station;
a path for interaction between the base station and the antenna unit at the central point of the IRS;
alternatively, the first and second electrodes may be,
the fourth path comprises one or more of:
a path for interaction between an antenna unit closest to the base station on the IRS and a terminal closest to the base station within the coverage of the IRS;
the path of interaction between the antenna unit farthest from the base station on the IRS and the terminal farthest from the base station in the coverage area of the IRS;
and the antenna unit at the central point on the IRS interacts with the terminal which is farthest away from the IRS in the coverage range of the IRS.
12. The method of claim 7, wherein the second path comprises one or more of:
a path through which a terminal closest to the base station within the coverage area of the IRS directly interacts with the base station;
a path through which a terminal farthest from the base station within the coverage area of the IRS directly interacts with the base station;
and a path directly interacting between a terminal farthest from the IRS and the base station within the coverage area of the IRS.
13. The method according to claim 11 or 12, characterized in that the method further comprises:
receiving one or more of the following reported by the IRS or configured by an operation and maintenance system:
information of the antenna unit closest to the base station;
information of the antenna unit farthest from the base station;
information within the coverage area of the IRS that is closest to the base station;
information farthest from the base station within the coverage area of the IRS;
the IRS covers information farthest from the IRS.
14. A method for synchronous clock compensation, performed by a terminal, comprising:
receiving compensation information of a synchronous clock, wherein the compensation information of the synchronous clock is a path which is determined according to a first path and a second path, the first path represents a path for a terminal to interact with a base station through an IRS, and the second path is a path for the terminal to directly interact with the base station;
and carrying out synchronous compensation according to the compensation information of the synchronous clock.
15. The method of claim 14, wherein performing synchronization compensation according to the compensation information of the synchronous clock comprises:
if the compensation information of the synchronous clock comprises: TA, updating the clock of air interface synchronization;
if the compensation information of the synchronous clock comprises: and the GP determines the symbol for receiving the downlink signal or sending the uplink signal according to the symbol occupied by the GP.
16. The method of claim 14, wherein receiving compensation information for the synchronous clock comprises:
the compensation information of the synchronization clock is received through the MAC CE or the DCI.
17. The method of claim 14, wherein the first path comprises: a third path and a fourth path, where the third path is a path when the base station interacts with the IRS; the fourth path is a path where the IRS interacts with the terminal.
18. The method of claim 17, wherein the third path comprises one or more of:
a path for interaction between the base station and the antenna unit closest to the base station in the IRS;
a path for interaction between the base station and an antenna unit in the IRS, which is farthest from the base station;
a path for interaction between the base station and the antenna unit at the central point of the IRS;
alternatively, the first and second electrodes may be,
the fourth path comprises one or more of:
a path for interaction between an antenna unit closest to the base station on the IRS and a terminal closest to the base station within the coverage of the IRS;
the path of interaction between the antenna unit farthest from the base station on the IRS and the terminal farthest from the base station in the coverage area of the IRS;
and the antenna unit at the central point on the IRS interacts with the terminal which is farthest away from the IRS in the coverage range of the IRS.
19. The method of claim 14, wherein the second path comprises one or more of:
a path through which a terminal closest to the base station within the coverage area of the IRS directly interacts with the base station;
a path through which a terminal farthest from the base station within the coverage area of the IRS directly interacts with the base station;
and a path directly interacting between a terminal farthest from the IRS and the base station within the coverage area of the IRS.
20. A synchronous compensator, comprising:
a first determining module, configured to determine a first path, where the first path indicates a path where a terminal interacts with a base station through an IRS;
a second determining module, configured to determine compensation information of a synchronous clock of the terminal according to the first path and a second path, where the second path is a path where the terminal and the base station directly interact with each other;
and the first sending module is used for sending the compensation information of the synchronous clock to the terminal.
21. A synchronous compensator, comprising:
a first receiving module, configured to receive compensation information of a synchronous clock, where the compensation information of the synchronous clock indicates a path where a terminal interacts with a base station through an IRS according to a first path and a second path, and the second path is a path where the terminal directly interacts with the base station;
and the processing module is used for carrying out synchronous compensation according to the compensation information of the synchronous clock.
22. A network-side device, comprising: processor, memory and program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method according to any one of claims 1 to 13.
23. A terminal, comprising: processor, memory and program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method according to any one of claims 14 to 19.
24. A readable storage medium, characterized in that it has stored thereon a program which, when being executed by a processor, carries out steps comprising the method according to any one of claims 1 to 19.
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