CN114641057B

CN114641057B - Power control method and device, road side equipment and network side equipment

Info

Publication number: CN114641057B
Application number: CN202011481158.7A
Authority: CN
Inventors: 刘英浩
Original assignee: CICTCI Technology Co Ltd
Current assignee: CICTCI Technology Co Ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2023-08-08
Anticipated expiration: 2040-12-15
Also published as: CN114641057A

Abstract

The invention provides a power control method, a device, road side equipment and network side equipment, wherein the method comprises the following steps: receiving a first synchronization signal sent by a second RSU; wherein the first synchronization signal includes transmission power information of the first synchronization signal transmitted by the second RSU; determining power adjustment range information according to the first synchronization signal; the power adjustment range information is used for indicating a power adjustment range of the second RSU for sending a synchronous signal; transmitting the power adjustment range information to an operation maintenance center OMC; and/or broadcasting the second synchronization signal in a mode of carrying the power adjustment range information in the second synchronization signal. The scheme of the invention solves the mutual interference among RSUs by controlling the transmitting power of the RSUs, and realizes the automatic network optimization of the RSU power.

Description

Power control method and device, road side equipment and network side equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a power control method, a device, a roadside device, and a network side device.

Background

Currently, RSUs (Road Side units) and OBUs (On board units) of LTE (Long Term Evolution ) V2X (Vehicle-to-Everything) broadcast and transmit V2X signals with a fixed configuration of transmission power. Whereas in a scenario without a GNSS (global navigation satellite system ) clock synchronization source, typically like a tunnel scenario, synchronization is usually achieved using PC5 air interface synchronization and positioning techniques. At this time, in order to achieve PC5 air interface synchronization, the RSU needs to broadcast a transmission synchronization signal using fixed time and frequency domain resources.

However, when two RSUs use the same time and frequency domain resources, mutual interference will result, causing other RSUs and OBUs to fail decoding. Therefore, the test needs to be repeated manually, and the related parameters of the transmitting power of the RSU are adjusted and optimized according to the test result, but the power optimization mode of the RSU is difficult and complicated, and the problem of mutual interference among the RSUs cannot be effectively solved.

Disclosure of Invention

The invention provides a power control method, a device, road side equipment and network side equipment, which solve the problem that the power optimization scheme in the prior art cannot effectively solve the mutual interference between RSUs.

In a first aspect, an embodiment of the present invention provides a power control method applied to a first road side unit RSU, including:

receiving a first synchronization signal sent by a second RSU; wherein the first synchronization signal includes transmission power information of the first synchronization signal transmitted by the second RSU;

determining power adjustment range information according to the first synchronization signal; the power adjustment range information is used for indicating a power adjustment range of the second RSU for sending a synchronous signal;

transmitting the power adjustment range information to an operation maintenance center OMC; and/or broadcasting the second synchronization signal in a mode of carrying the power adjustment range information in the second synchronization signal.

In a second aspect, an embodiment of the present invention provides a power control method applied to a second RSU, including:

receiving a second synchronous signal sent by the first RSU; the second synchronization signal comprises power adjustment range information, and the power adjustment range information is used for indicating a power adjustment range of the second RSU sending the synchronization signal;

and determining target power range information sent by the synchronous signal according to the power adjustment range information.

In a third aspect, an embodiment of the present invention provides a power control method, applied to OMC, including:

receiving power adjustment range information sent by a first RSU; the power adjustment range information is used for indicating a power adjustment range of the synchronous signal sent by the second RSU;

determining target power range information sent by the synchronous signal according to the power adjustment range information;

and sending the target power range information to the second RSU.

In a fourth aspect, an embodiment of the present invention provides a roadside device, which is a first RSU, including: a transceiver, a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the power control method according to the first aspect when the computer program is executed.

In a fifth aspect, an embodiment of the present invention provides a roadside device, which is a second RSU, including: a transceiver, a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the power control method as described in the second aspect when the computer program is executed.

In a sixth aspect, an embodiment of the present invention provides a network-side device, including: a transceiver, a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the power control method according to the third aspect when the computer program is executed.

In a seventh aspect, an embodiment of the present invention provides a power control apparatus applied to a first RSU, including:

the first receiving module is used for receiving a first synchronous signal sent by the second RSU; wherein the first synchronization signal includes transmission power information of the first synchronization signal transmitted by the second RSU;

the first processing module is used for determining power adjustment range information according to the first synchronous signal; the power adjustment range information is used for indicating a power adjustment range of the second RSU for sending a synchronous signal;

the first sending module is used for sending the power adjustment range information to an operation maintenance center OMC; and/or broadcasting the second synchronization signal in a mode of carrying the power adjustment range information in the second synchronization signal.

In an eighth aspect, an embodiment of the present invention provides a power control apparatus applied to a second RSU, including:

The second receiving module is used for receiving a second synchronous signal sent by the first RSU; the second synchronization signal comprises power adjustment range information, and the power adjustment range information is used for indicating a power adjustment range of the second RSU sending the synchronization signal;

and the second processing module is used for determining target power range information sent by the synchronous signal according to the power adjustment range information.

In a ninth aspect, an embodiment of the present invention provides a power control apparatus, applied to OMC, including:

the third receiving module is used for receiving the power adjustment range information sent by the first RSU; the power adjustment range information is used for indicating a power adjustment range of the synchronous signal sent by the second RSU;

the third processing module is used for determining target power range information sent by the synchronous signal according to the power adjustment range information;

and the second sending module is used for sending the target power range information to the second RSU.

In a tenth aspect, embodiments of the present invention provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the power control method as described in the first aspect, or implements the steps of the power control method as described in the second aspect, or implements the steps of the power control method as described in the third aspect.

The technical scheme of the invention has the beneficial effects that:

according to the embodiment of the invention, the power adjustment ranges of different RSUs are determined through the received synchronous signal strengths of the different RSUs and are fed back to the OMC or the RSU to control the transmitting power of the RSU, so that automatic network optimization of the RSU power is realized, and the mutual interference among the RSUs is effectively solved.

Drawings

FIG. 1 is a schematic diagram of a typical network architecture of LTE V2X in the prior art according to an embodiment of the present invention;

fig. 2 shows a schematic diagram of an RSU in a tunnel scenario in the prior art according to an embodiment of the present invention;

FIG. 3 shows one of the flowcharts of the power control method of an embodiment of the present invention;

FIG. 4 is a second flowchart of a power control method according to an embodiment of the invention;

FIG. 5 is a third flowchart of a power control method according to an embodiment of the invention;

fig. 6 shows one of the block diagrams of the power control apparatus according to the embodiment of the present invention;

FIG. 7 is a second block diagram of a power control apparatus according to an embodiment of the present invention;

FIG. 8 is a third block diagram of a power control apparatus according to an embodiment of the present invention;

FIG. 9 shows one of the block diagrams of the construction of the roadside apparatus according to the embodiment of the present invention;

FIG. 10 shows a second block diagram of a roadside apparatus according to an embodiment of the present invention;

Fig. 11 is a block diagram of a network device according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided merely to facilitate a thorough understanding of embodiments of the invention. It will therefore be apparent to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

In addition, the terms "system" and "network" are often used interchangeably herein.

In the examples provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B may be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information.

In the embodiment of the invention, the form of the access network is not limited, and the access network may be an access network including a macro base station (Macro Base Station), a micro base station (Pico Base Station), a Node B (3G mobile base station name), an enhanced base station (eNB), a Home enhanced base station (Femto eNB or Home eNode B or Home eNB or HeNB), a relay station, an access point, an RRU (Remote Radio Unit, a remote radio module), an RRH (Remote Radio Head, a remote radio head), and the like. The user terminal may be a mobile phone (or handset), or other device capable of transmitting or receiving wireless signals, including user equipment, personal Digital Assistant (PDA), wireless modem, wireless communicator, handheld device, laptop, cordless phone, wireless Local Loop (WLL) station, CPE (Customer Premise Equipment, client terminal) or mobile smart hot spot capable of converting mobile signals to WiFi signals, smart home appliances, or other devices capable of spontaneously communicating with a mobile communication network without manipulation by a person, etc.

Typical network architecture for LTE V2X as shown in fig. 1, RSU and OBU communicate over PC5 air interface, RSU is connected to OMC over ethernet or 4/5G Uu interface.

Under the condition that GNSS signals are good, GNSS synchronization is based between the RSU and the OBU of the LTE V2X; in a scenario without a GNSS clock synchronization source (typically as a tunnel scenario), a synchronization scheme based on PC5 air interface signals may be used.

For example, as shown in fig. 2, an example of synchronization establishment of RSUs in a tunnel is shown, after receiving a GNSS signal, an RSU0 outside the tunnel transmits GNSS clocks to each RSU in the tunnel step by step, and in the transmission process, accumulation of air interface delay is eliminated by an algorithm, so as to determine accuracy of each RSU clock in the tunnel. And the OBU performs PC5 air interface synchronization through the received RSU synchronization signal. Specifically, the RSU0 may receive the GNSS signal for synchronization, and periodically send a PC5 air interface synchronization signal to the outside, where the synchronization signal includes information such as synchronization level, frame number, RSU ID (Identity), longitude and latitude; when the RSU1 is in a scene without GNSS signal reception, the RSU1 can perform PC5 air interface synchronization by receiving a synchronization signal from the RSU0, and after synchronization is successful, the RSU1 periodically transmits the PC5 air interface synchronization signal outwards; the RSU2 receives the synchronization signal from the RSU1 to perform PC5 air interface synchronization, and step by step synchronizes to other subsequent RSUs.

At this time, in order to achieve PC5 air interface synchronization, the RSU will occupy specific time domain and frequency domain resources when transmitting the synchronization signal on the PC5 air interface, and in order to demodulate the synchronization signal more easily, the synchronization signal is usually transmitted in full bandwidth on the frequency domain. On the other hand, in order to reduce occupation of the PC5 air interface resource, the synchronization signal is transmitted in a period T (typically, t=100 ms), for example, in an Xms transmission in each period T. In addition, the PC5 air interface uses PSCCH (PSCCH Pysical Sidelink Control Channel, physical Sidelink control channel) and PSSCH (Pysical Sidelink Share Channel, physical Sidelink shared channel), and each RSU will not receive signals transmitted by other RSUs when transmitting signals. Therefore, in order to stagger the time domain transmission windows between RSUs, for RSU (i), transmission is typically performed according to X (i) =i mod M, where M is typically configured as a fixed integer less than N, where N is the total number of RSUs in the tunnel. Whereas the OBU is not able to send a signal in every period T, 0-M-1 ms, in order to receive all possible RSU transmitted synchronization signals. In this case, if the configuration of M is large, the window for transmitting the synchronization signal by all RSUs occupies too much time domain resources in the period T, resulting in waste of the time domain resources transmitted by the OBUs, so that the configuration of M cannot be too large.

In the above synchronization scheme, the same time domain and frequency domain resources are used for RSU (k) and RSU (m+k). And when two RSU terminals use the same time domain and frequency domain resources, mutual interference will be caused, so that decoding of other RSUs and OBUs fails.

For example, when RSU (i) (k < i < m+k) or OBU is between RSU (k) and RSU (m+k), synchronization signals of both RSU (k) and RSU (m+k) may be received. Since the same time and frequency domain resources are used for receiving two RSUs, the following may occur: if the signal strength difference of the two RSUs is large, the RSU signal with large signal strength can be demodulated, and the RSU signal with small signal strength can not be demodulated as an interference signal; if the signal strength difference between the two RSUs is not large, the signal to noise ratio of the two RSUs is low, and the two RSU signals cannot be demodulated, so that the two RSU signals cannot be used as a synchronization source for synchronization.

In addition, at present, both RSUs and OBUs of LTE V2X broadcast V2X signals with fixed configured transmit power, which is usually 23dBm at the maximum value defined by the 3GPP protocol, so signal interference between each RSU (k) and RSU (m+k) will be serious, especially in a tunnel environment with less attenuation of signal air interface.

For the RSU synchronous signals which cannot be demodulated, the existing scheme cannot acquire the actually received signal strength, and therefore network optimization under the networking condition cannot be performed. Therefore, the RSUs using the same time domain and frequency domain resources can only be manually stopped from sending signals in turn, the test needs to be repeated manually, and the power adjustment is performed according to the test results after the test respectively, so that the related parameters of the transmitting power of the RSUs can be optimized. Therefore, the power network optimization of the RSU in the prior art is difficult and complicated, and the problem of mutual interference between the RSUs cannot be effectively solved.

Specifically, the embodiment of the invention provides a power control method, a device, road side equipment and network side equipment, which solve the problem that the power optimization adjustment of an RSU in the prior art is difficult.

First embodiment

As shown in fig. 3, an embodiment of the present invention provides a power control method applied to a first road side unit RSU, which specifically includes the following steps:

step 31: receiving a first synchronization signal sent by a second RSU; wherein the first synchronization signal includes transmission power information of the second RSU transmitting the first synchronization signal.

For example, the initial default value of the transmission power of the first synchronization signal transmitted by the second RSU may be set to 23dBm, and the transmission power information may be carried in the first synchronization signal transmitted by the second RSU, where the transmission power information indicates the transmission power Pnow currently used by the second RSU.

Step 32: determining power adjustment range information according to the first synchronization signal; the power adjustment range information is used for indicating a power adjustment range of the second RSU for transmitting a synchronization signal.

Optionally, step 32 may include: obtaining actual power information of the first synchronization signal; and determining the power adjustment range information according to the transmitting power information, the actual power information and configuration power range information obtained in advance from the OMC.

It should be noted that the configuration power range information may be obtained from the OMC. Specifically, the OMC may perform planning configuration for the first RSU, for example, plan which other RSUs need to receive the synchronization signals sent by the first RSU, so as to determine a distribution range of an RSU for the first RSU, and determine configuration power range information of each RSU in the distribution range for the first RSU. Here, the power range information is configured to avoid mutual interference between RSUs, and represents an actual power range of a synchronization signal that the first RSU expects to receive.

For example, as an alternative embodiment of the present application, RSU (i) represents a first RSU, RSU (j) represents any RSU in the distribution range, that is, a second RSU, RSRP (i, j) represents actual power of a first synchronization signal received by the first RSU (the first synchronization signal is transmitted by the second RSU), pnow (j) represents transmit power obtained by demodulating the first synchronization signal for the first RSU (that is, transmit power information of the first synchronization signal transmitted by the second RSU included in the first synchronization signal), so OMC may plan, for each RSU (i), a maximum rsrp_max (i, j) and a minimum rsrp_min (i, j) of each RSU (i, j) in the distribution range that it needs to receive, that is, OMC plans, for RSU (i), a configuration power range [ rsrp_min (i, j), rsrp_max (i, j) ], RSU (i) may obtain configuration power range information about RSU (j) from OMC.

The power adjustment range information (i.e., the recommended power range) for RSU (j) by RSU (i) can be obtained by the following equation:

Psmax(i，j)＝min(Pnow(j)-RSRP(i，j)+RSRP_max(i，j)，Pmax)；

Psmin(i，j)＝min(Pnow(j)-RSRP(i，j)+RSRP_min(i，j)，Pmin)；

wherein Psmax (i, j) represents the maximum value of the power adjustment range; psmin (i, j) represents the minimum value of the power adjustment range; pnow (j) is the transmit power of the first synchronization signal; the RSRP (i, j) is the actual power of the first synchronization signal sent by the RSU (j) received by the RSU (i); rsrp_max (i, j) is the maximum value of the power range (i.e. the maximum value of the configuration power range) that each RSU (i, j) needs to receive for planning RSU (i); rsrp_min (i, j) is the minimum value of the power range (i.e. the minimum value of the configuration power range) that each RSU (i, j) needs to receive for planning RSU (i); pmax is the maximum transmit power configured by OMC, for example, it may be configured as 23dbm by default; pmin is the minimum transmit power configured by the OMC and may be configured by default to 0dbm, for example.

Step 33: transmitting the power adjustment range information to an operation maintenance center OMC; and/or broadcasting the second synchronization signal in a mode of carrying the power adjustment range information in the second synchronization signal.

Here, the first RSU reports or feeds back power adjustment range information (including Psmax (i, j) and qmin (i, j)) to the OMC or to the second RSU to perform power adjustment on the second RSU. The first RSU can be connected to the OMC through an Ethernet or a 4/5G Uu port, so that the power adjustment range information is sent to the OMC; the first RSU may broadcast and transmit a second synchronization signal, wherein the second synchronization signal includes power adjustment range information, and the second RSU may obtain the power adjustment range information by receiving the second synchronization signal.

Optionally, the power control method further includes:

transmitting a third synchronization signal in a target time slot of an xth transmission period T;

the determining mode of the target time slot is as follows: determining a transmitting time domain mode of an xth transmitting period T according to x; time slot number M corresponding to different transmitting time domain modes _t Different; the number M of time slots _t Is a hairThe number of time slots used for transmitting the synchronous signals in the transmission period T; wherein the target time slot is the identification sequence number i of the first RSU divided by the time slot number M _t The remainder obtained; x, T, M _t And i are positive integers.

In this embodiment, the transmitting time domain mode may be changed according to the number of times of sending the synchronization signal, so that the synchronization signal sent by each RSU has a time domain chance not to be interfered by other RSUs.

As an alternative implementation, the synchronization signal is sent according to a period T, e.g., t=100 ms. Specifically, the transmission may be performed in the Xms of each period T. Here, in order to stagger the time domain transmission windows among the RSUs, the RSU (i) may be set to X (i) =i mod M _t And transmitting.

M is the same as that of the prior art _t Representing the number of time slots for transmitting the synchronization signal in one transmission period T, and thus the number of time slots M is different _t May correspond to different transmit time domain modes. For example, n (at least two) transmission time domain modes may be configured, then the corresponding number of slots M _t Can take the value M ₀ 、M ₁ 、…、M _n-1 。

Optionally, the time slot number M _t Determined from the remainder t of dividing x by n, i.e. M _t ＝M _{(x mod n)} . Wherein n represents the number of kinds of the transmitting time domain modes; n and t are both positive integers.

It can be seen that the number of slots M _t Can be varied according to the number x of transmissions, i.e. the number M of time slots is determined according to the current transmission period T _t I.e. it is determined which transmit time domain mode is to be used in the current transmission period T. For example, pattern M is used at the xth transmission period T (i.e., at the time of transmitting the xth synchronization signal) _{(x mod n)} 。

Optionally, the time slot number M _t Less than the total number of RSUs to be adjustedThe method comprises the steps of carrying out a first treatment on the surface of the Wherein the RSU to be adjusted is an RSU in a preset area where the first RSU is located, and the time slot number M _t Is a positive integer.

For example, as an alternative embodiment of the present application, n may be set to 2, i.e. configured with two transmit time domain modes: m is M ₀ And M ₁ . When the number of transmissions x is an odd number, the remainder of dividing x by n is 1, M _t ＝M ₁ The method comprises the steps of carrying out a first treatment on the surface of the When the number of transmissions x is even, the remainder of dividing x by n is 0, M _t ＝M ₀ 。

It should be noted that, assuming that the total number of RSUs to be adjusted is N, M ₁ And M ₀ Typically configured as a fixed integer less than N, M ₁ And M ₀ Can be of a mutual quality relationship, i.e. (M) ₁ ，M ₀ ) =1. For example, as a typical configuration, M may be set ₀ ＝M，M ₁ =m+1. Under the scheme, when two RSUs using the same time domain resource are transmitted in odd number, the same time domain resource is not used in even number, so that the time domain opportunity of the transmitting signals of all RSUs is ensured not to be interfered by other RSUs.

Based on this principle, the OMC can plan for each RSU (i) that it needs to receive the maximum value rsrp_max (i, j) and the minimum value rsrp_min (i, j) of the configuration power range of the respective RSU (i, j).

In this embodiment, for example, in a linear scenario without GNSS coverage, the quality of the synchronization signal sent by each RSU can be automatically detected, and the hidden interference signal strength can be detected by using a resource allocation method with a variable time domain position; after detecting the RSU generating the interference signal, the power adjustment range can be automatically calculated, and then the RSU is transmitted to the RSU corresponding to the power adjustment range through the OMC or the synchronous signal, so that the RSU can perform power adjustment operation according to the power adjustment range, and network interference is reduced. The interference detection and the power adjustment can be automatically performed without manual test optimization, and network optimization can be rapidly completed, so that the mutual interference among RSUs is effectively solved.

In the embodiment of the application, by adopting the resource allocation method with variable time domain positions, after network construction is completed, the transmitting time domain mode can be changed according to the transmission times of the synchronizing signals, so that the RSU can be ensured to receive the synchronizing signals transmitted by other RSUs, the signal intensity of other interfering RSUs is detected, the power of other RSUs is further controlled, and the mutual interference among the RSUs is effectively solved.

Optionally, the second synchronization signal includes transmitting transmission power information of the second synchronization signal, RSU identification information, and power adjustment range information corresponding to the RSU identification information.

The RSU identification information may include identifications of a plurality of RSUs, and the power adjustment range information may include power adjustment range information corresponding to the identifications of the RSUs one by one.

The embodiment of the invention can allocate resources based on fixed frequency domain resources and variable time domain positions, determines the power adjustment ranges of different RSUs through the received synchronous signal strength of the different RSUs, and feeds back the power adjustment ranges to the OMC or the RSU to control the transmitting power of the RSU, thereby realizing automatic network optimization of the RSU power and effectively solving the mutual interference among the RSUs.

Second embodiment

As shown in fig. 4, an embodiment of the present invention provides a power control method applied to a second RSU, which specifically includes the following steps:

step 41: receiving a second synchronous signal sent by the first RSU; the second synchronization signal includes power adjustment range information, where the power adjustment range information is used to indicate a power adjustment range of the second RSU for transmitting the synchronization signal.

Here, the second RSU may receive one or more synchronization signals, each of which includes transmission power information for transmitting the synchronization signal, RSU identification information, and power adjustment range information corresponding to the RSU identification information. The second RSU may parse the received synchronization signal, and obtain power adjustment range information corresponding to the identifier of the second RSU when it is parsed that the RSU identifier information in the synchronization signal includes the identifier of the second RSU, and perform a step of determining target power range information according to the power adjustment range information; when the RSU ID carried in the synchronous signal is not consistent with the RSU ID of the second RSU, the synchronous signal is not subjected to subsequent processing.

For example, the second RSU receives a second synchronization signal sent by the first RSU, where the second synchronization signal carries power adjustment range information for the second RSU. Wherein the second RSU may receive one or more second synchronization signals, which are transmitted by different first RSUs.

Step 42: and determining target power range information sent by the synchronous signal according to the power adjustment range information.

Optionally, step 42 may specifically include:

determining priorities of different power adjustment range information according to the distance between a first RSU sending the power adjustment range information and the second RSU; the larger the distance between the first RSU and the second RSU is, the lower the priority of the power adjustment range information sent by the first RSU is;

determining the power adjustment range information of the highest priority as target power range information;

comparing the power adjustment range information with different priorities with the target power range information in sequence according to the order of the priorities from high to low;

and adjusting the target power range information according to the comparison result until the comparison of the power adjustment range information with the lowest priority is completed.

For example, as an alternative embodiment of the present application, RSU (i) represents a first RSU and RSU (j) represents a second RSU. The priority of different power adjustment range information can be determined according to the magnitude of the distance between the RSU (i) and RSU (j) transmitting the power adjustment range information. Wherein, the closer RSU (i) is to RSU (j), the higher the priority of the power adjustment range information it transmits. After the priority is determined, sequentially comparing the information according to the order of the priority from high to low, and adjusting the target power range according to the comparison result until the power adjustment range information of the lowest priority is compared, thereby determining the final target power range.

In this embodiment of the present application, the second RSU performs power control based on the received synchronization signal, and specifically may perform power adjustment according to the power adjustment range information carried in the synchronization signal, so as to complete primary network power adjustment optimization, without adding additional signaling.

Optionally, the adjusting the target power range information according to the comparison result includes:

adjusting the target power range information to the same portion of the power adjustment range information as the target power range information in the case where the power adjustment range information has the same portion as the target power range information;

in the case where the power adjustment range information does not have the same portion as the target power range information, the target power range information is kept unchanged.

That is, in the above-described embodiment, if the RSU (i) transmits the power adjustment range with the current target power range having an intersection, the current target power range is replaced with the intersection of the two; if there is no intersection, the current target power range is not changed. In this way, all RSUs (i) transmitting the power adjustment range information are traversed step by step in order of priority from high to low, and the power adjustment range is narrowed step by step, so as to obtain the target power range information (i.e., the final adjustment power) of the RSUs (j).

In this embodiment, for example, in a linear scenario without GNSS coverage, the power adjustment range information may be issued to the RSU corresponding to the power adjustment range information through the OMC, so that the RSU may perform a power adjustment operation according to the power adjustment range, so as to reduce network interference. The power adjustment can be automatically performed without manual test optimization, and network optimization can be rapidly completed.

In the embodiment of the application, the power adjustment range information carried in the synchronization signal can be obtained by receiving the synchronization signal sent by other RSUs, and the target power range is determined according to the power adjustment range information, so that the self transmitting power is controlled, and the mutual interference among the RSUs is effectively solved.

Third embodiment

As shown in fig. 5, an embodiment of the present invention provides a power control method applied to OMC, specifically including the following steps:

step 51: receiving power adjustment range information sent by a first RSU; the power adjustment range information is used for indicating a power adjustment range of the second RSU for transmitting the synchronous signal.

Here, the OMC may receive one or more power adjustment range information for the second RSU, which are transmitted by different first RSUs.

Step 52: and determining target power range information sent by the synchronous signal according to the power adjustment range information.

Optionally, step 52 may specifically include:

For example, as an alternative embodiment of the present application, RSU (i) represents a first RSU and RSU (j) represents a second RSU. The priority of different power adjustment range information can be determined according to the magnitude of the distance between the RSU (i) transmitting the power adjustment range information and the RSU (j). Wherein, the closer RSU (i) is to RSU (j), the higher the priority of the power adjustment range information it transmits. After the priority is determined, sequentially comparing the information according to the order of the priority from high to low, and adjusting the target power range according to the comparison result until the power adjustment range information of the lowest priority is compared, thereby determining the final target power range.

Step 53: and sending the target power range information to the second RSU.

In this embodiment of the present application, after receiving power adjustment range information (i.e., power adjustment suggestion) reported by a certain RSU, the OMC may synthesize a network overall indicator to determine a power adjustment amount (i.e., target power range information) of the RSU to which the power adjustment range information is directed, and send the target power range information to a corresponding RSU, so that the OMC performs power control according to the target power range information, so as to reduce interference between RSUs.

The OMC configures the target power range information to the RSU (j) through the Ethernet or 4/5G Uu as a return link, so that primary network power adjustment optimization is completed. In this way, the OMC performs power control based on the power advice reported by the RSU, so that a part of RSUs reduce the transmission power, thereby ensuring that RSU signals in the adjustment range are not interfered.

It should be noted that the OMC may perform planning configuration for the first RSU, for example, plan which other RSUs need to receive the synchronization signals sent by the first RSU, so as to determine a distribution range of an RSU for the first RSU, and determine configuration power range information of each RSU in the distribution range for the first RSU. Here, the power range information is configured to avoid mutual interference between RSUs, and represents a range of actual power of a synchronization signal that the first RSU expects to receive. After the first RSU obtains the configuration power range information from the OMC, the power adjustment range information may be determined according to the configuration power range information, where the power adjustment range information is used to indicate a power adjustment range of the second RSU for sending a synchronization signal.

In the embodiment of the application, the power adjustment operation can be performed according to the power adjustment range by receiving the power adjustment range information sent by the first RSU for the second RSU, determining the target power range of the second RSU according to the power adjustment range information, and sending the target power range to the second RSU, so as to reduce network interference. The power adjustment can be automatically executed without manual test optimization, network optimization can be rapidly completed, and mutual interference among RSUs can be effectively solved.

Fourth embodiment

As shown in fig. 6, an embodiment of the present invention provides a power control apparatus 600, applied to a first road side unit RSU, including:

a first receiving module 601, configured to receive a first synchronization signal sent by a second RSU; wherein the first synchronization signal includes transmission power information of the first synchronization signal transmitted by the second RSU;

a first processing module 602, configured to determine power adjustment range information according to the first synchronization signal; the power adjustment range information is used for indicating a power adjustment range of the second RSU for sending a synchronous signal;

a first sending module 603, configured to send the power adjustment range information to an operation maintenance center OMC; and/or broadcasting the second synchronization signal in a mode of carrying the power adjustment range information in the second synchronization signal.

Optionally, the first processing module 602 includes:

a first processing unit, configured to obtain actual power information of the first synchronization signal;

and a second processing unit, configured to determine the power adjustment range information according to the transmit power information, the actual power information, and configuration power range information obtained in advance from the OMC.

Optionally, the power control apparatus 600 further includes:

a third transmitting module, configured to transmit a third synchronization signal in a target time slot of an xth transmission period T;

the determining mode of the target time slot is as follows:

determining a transmitting time domain mode of an xth transmitting period T according to x; time slot number M corresponding to different transmitting time domain modes _t Different; the number M of time slots _t The number of time slots for transmitting the synchronization signal in one transmission period T; wherein the target time slot is the identification sequence number i of the first RSU divided by the time slot number M _t The remainder obtained; x, T, M _t And i are positive integers.

Optionally, the time slot number M _t Determined from the remainder t of dividing x by n; wherein n represents the number of kinds of the transmitting time domain modes; n and t are both positive integers.

Optionally, the time slot number M _t Less than the total number of RSUs to be adjusted; the RSU to be adjusted is an RSU in a preset area where the first RSU is located.

The fourth embodiment of the present invention corresponds to the method of the first embodiment, and all the implementation means in the first embodiment are applicable to the embodiment of the power control device, so that the same technical effects can be achieved.

Fifth embodiment

As shown in fig. 7, an embodiment of the present invention provides a power control apparatus 700, applied to a second RSU, including:

a second receiving module 701, configured to receive a second synchronization signal sent by the first RSU; the second synchronization signal comprises power adjustment range information, and the power adjustment range information is used for indicating a power adjustment range of the second RSU sending the synchronization signal;

and the second processing module 702 is configured to determine target power range information sent by the synchronization signal according to the power adjustment range information.

Optionally, the second processing module 702 includes:

a first priority determining unit, configured to determine priorities of different power adjustment range information according to a distance between a first RSU that transmits the power adjustment range information and the second RSU; the larger the distance between the first RSU and the second RSU is, the lower the priority of the power adjustment range information sent by the first RSU is;

a first power range determining unit configured to determine the power adjustment range information of the highest priority as target power range information;

the first power range comparison unit is used for comparing the power adjustment range information with different priorities with the target power range information in sequence according to the order of the priorities from high to low;

And the first power range adjusting unit is used for adjusting the target power range information according to the comparison result until the comparison of the power adjustment range information with the lowest priority is completed.

Optionally, the first power range adjustment unit includes:

a first adjustment subunit, configured to adjust, when the power adjustment range information has the same portion as the target power range information, the target power range information to the same portion as the power adjustment range information;

and a second adjustment subunit, configured to keep the target power range information unchanged if the power adjustment range information does not have the same portion as the target power range information.

The fifth embodiment of the present invention corresponds to the method of the second embodiment, and all the implementation means in the second embodiment are applicable to the embodiment of the power control device, so that the same technical effects can be achieved.

Sixth embodiment

As shown in fig. 8, an embodiment of the present invention provides a power control apparatus 800, applied to OMC, including:

a third receiving module 801, configured to receive power adjustment range information sent by the first RSU; the power adjustment range information is used for indicating a power adjustment range of the synchronous signal sent by the second RSU;

A third processing module 802, configured to determine target power range information sent by the synchronization signal according to the power adjustment range information;

a second sending module 803, configured to send the target power range information to the second RSU.

Optionally, the third processing module 802 includes:

a second priority determining unit, configured to determine priorities of different power adjustment range information according to a distance between a first RSU that transmits the power adjustment range information and the second RSU; the larger the distance between the first RSU and the second RSU is, the lower the priority of the power adjustment range information sent by the first RSU is;

a second power range determining unit configured to determine the power adjustment range information of the highest priority as target power range information;

the second power range comparison unit is used for comparing the power adjustment range information with different priorities with the target power range information in sequence according to the order of the priorities from high to low;

and the second power range adjusting unit is used for adjusting the target power range information according to the comparison result until the comparison of the power adjustment range information with the lowest priority is completed.

Optionally, the second power range adjustment unit includes:

a third adjustment subunit configured to adjust, when the power adjustment range information has the same portion as the target power range information, the target power range information to the same portion as the power adjustment range information;

and a fourth adjustment subunit, configured to keep the target power range information unchanged if the power adjustment range information does not have the same portion as the target power range information.

A sixth embodiment of the present invention corresponds to the method of the third embodiment, and all the implementation means in the third embodiment are applicable to the embodiment of the power control device, so that the same technical effects can be achieved.

Seventh embodiment

In order to better achieve the above object, as shown in fig. 9, a seventh embodiment of the present invention further provides a road side device, which is a first RSU, including:

a processor 900; and a memory 920 connected to the processor 900 through a bus interface, the memory 920 storing programs and data used by the processor 900 when performing operations, the processor 900 calling and executing the programs and data stored in the memory 920.

Wherein the transceiver 910 is coupled to a bus interface for receiving and transmitting data under the control of the processor 900; specifically, the transceiver 910 is configured to receive a first synchronization signal sent by the second RSU; wherein the first synchronization signal includes transmission power information of the first synchronization signal transmitted by the second RSU; the processor 900 is configured to read the program in the memory 920 to perform the following steps:

Wherein in fig. 9, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 900 and various circuits of memory represented by memory 920, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 910 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The user interface 930 may also be an interface capable of interfacing with an inscribed desired device for a different terminal, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 900 is responsible for managing the bus architecture and general processing, and the memory 920 may store data used by the processor 900 in performing operations.

Optionally, the processor 900 is further configured to obtain actual power information of the first synchronization signal; and determining the power adjustment range information according to the transmitting power information, the actual power information and configuration power range information obtained in advance from the OMC.

Optionally, the processor 900 is further configured to send a third synchronization signal in the target slot of the x-th sending period T; the determining mode of the target time slot is as follows: determining a transmitting time domain mode of an xth transmitting period T according to x; time slot number M corresponding to different transmitting time domain modes _t Different; the number M of time slots _t The number of time slots for transmitting the synchronization signal in one transmission period T; wherein the target time slot is the identification sequence number i of the first RSU divided by the time slot number M _t The remainder obtained; x, T, M _t And i are positive integers.

Optionally, the time slot number M _t Determined from the remainder t of dividing x by n; which is a kind ofWherein n represents the number of types of the transmission time domain modes; n and t are both positive integers.

The road side equipment provided by the invention can allocate resources based on fixed frequency domain resources and variable time domain positions, determines the power adjustment ranges of different RSUs through the received synchronous signal strengths of the different RSUs, and feeds back the power adjustment ranges to the OMC or the RSU to control the transmitting power of the RSU, thereby realizing automatic network optimization of the RSU power and effectively solving the mutual interference among the RSUs.

Eighth embodiment

In order to better achieve the above object, as shown in fig. 10, an eighth embodiment of the present invention further provides a roadside device, which is a second RSU, including:

a processor 1000; and a memory 1020 connected to the processor 1000 through a bus interface, the memory 1020 storing programs and data used by the processor 1000 in performing operations, the processor 1000 calling and executing the programs and data stored in the memory 1020.

Wherein the transceiver 1010 is coupled to the bus interface for receiving and transmitting data under the control of the processor 1000; specifically, the transceiver 1010 is configured to receive a second synchronization signal sent by the first RSU; the second synchronization signal includes power adjustment range information, where the power adjustment range information is used to indicate a power adjustment range of the second RSU for transmitting the synchronization signal.

The processor 1000 is configured to read a program in the memory 1020 to perform the following steps:

Wherein in fig. 10, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by the processor 1000 and various circuits of the memory, represented by the memory 1020, are chained together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 1010 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The user interface 1030 may also be an interface capable of interfacing with an internal connection requiring device including, but not limited to, a keypad, display, speaker, microphone, joystick, etc., for different terminals. The processor 1000 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor 1000 in performing operations.

Optionally, the processor 1000 is further configured to determine priorities of different power adjustment range information according to a distance between the first RSU that transmits the power adjustment range information and the second RSU; the larger the distance between the first RSU and the second RSU is, the lower the priority of the power adjustment range information sent by the first RSU is;

Optionally, when the processor 1000 adjusts the target power range information according to the comparison result, the processor is specifically configured to:

The road side equipment provided by the invention can acquire the power adjustment range information carried in the synchronization signal by receiving the synchronization signal sent by other RSUs, and determine the target power range according to the power adjustment range information, thereby controlling the self transmitting power and effectively solving the mutual interference among the RSUs.

Ninth embodiment

In order to better achieve the above object, as shown in fig. 11, a ninth embodiment of the present invention further provides a network side device, including:

a processor 1100; and a memory 1120 connected to the processor 1100 through a bus interface, the memory 1120 storing programs and data used by the processor 1100 when performing operations, the processor 1100 calling and executing the programs and data stored in the memory 1120.

Wherein the transceiver 1110 is coupled to the bus interface for receiving and transmitting data under the control of the processor 1100; specifically, the transceiver 1110 is configured to receive power adjustment range information sent by the first RSU; the power adjustment range information is used for indicating a power adjustment range of the second RSU for transmitting the synchronous signal.

The processor 1100 is configured to read a program in the memory 1120 to perform the following steps: determining target power range information sent by the synchronous signal according to the power adjustment range information; and sending the target power range information to the second RSU.

Wherein in fig. 11, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 1100 and various circuits of memory represented by memory 1120, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 1110 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The user interface 1130 may also be an interface capable of interfacing with an internal connection requiring device for a different terminal, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1100 in performing operations.

Optionally, the processor 1100 is further configured to determine priorities of different power adjustment range information according to a distance between the first RSU that transmits the power adjustment range information and the second RSU; the larger the distance between the first RSU and the second RSU is, the lower the priority of the power adjustment range information sent by the first RSU is;

Optionally, when the processor 1100 adjusts the target power range information according to the comparison result, the processor is specifically configured to:

The network side equipment provided by the invention can be used for reducing network interference by receiving the power adjustment range information sent by the first RSU for the second RSU, determining the target power range of the second RSU according to the power adjustment range information and sending the target power range to the second RSU, so that the network side equipment can perform power adjustment operation according to the power adjustment range. The power adjustment can be automatically executed without manual test optimization, network optimization can be rapidly completed, and mutual interference among RSUs can be effectively solved.

Those skilled in the art will appreciate that all or part of the steps of implementing the above-described embodiments may be implemented by hardware, or may be implemented by instructing the relevant hardware by a computer program comprising instructions for performing some or all of the steps of the above-described methods; and the computer program may be stored in a readable storage medium, which may be any form of storage medium.

In addition, a specific embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the method in the first embodiment described above, or implements the steps of the method in the second embodiment described above, or implements the steps of the method in the third embodiment described above. And the same technical effects can be achieved, and in order to avoid repetition, the description is omitted here.

Furthermore, it should be noted that in the apparatus and method of the present invention, it is apparent that the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present invention. Also, the steps of performing the series of processes described above may naturally be performed in chronological order in the order of description, but are not necessarily performed in chronological order, and some steps may be performed in parallel or independently of each other. It will be appreciated by those of ordinary skill in the art that all or any of the steps or components of the methods and apparatus of the present invention may be implemented in hardware, firmware, software, or a combination thereof in any computing device (including processors, storage media, etc.) or network of computing devices, as would be apparent to one of ordinary skill in the art after reading this description of the invention.

The object of the invention can thus also be achieved by running a program or a set of programs on any computing device. The computing device may be a well-known general purpose device. The object of the invention can thus also be achieved by merely providing a program product containing program code for implementing said method or apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is apparent that the storage medium may be any known storage medium or any storage medium developed in the future. It should also be noted that in the apparatus and method of the present invention, it is apparent that the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present invention. The steps of executing the series of processes may naturally be executed in chronological order in the order described, but are not necessarily executed in chronological order. Some steps may be performed in parallel or independently of each other.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims

1. A power control method applied to a first road side unit RSU, comprising:

2. The power control method according to claim 1, wherein the determining power adjustment range information according to the first synchronization signal includes:

obtaining actual power information of the first synchronization signal;

And determining the power adjustment range information according to the transmitting power information, the actual power information and configuration power range information obtained in advance from the OMC.

3. The power control method of claim 1, further comprising:

the determining mode of the target time slot is as follows:

determining a transmitting time domain mode of an xth transmitting period T according to x; time slot number M corresponding to different transmitting time domain modes _t Different; the number M of time slots _t The number of time slots for transmitting the synchronization signal in one transmission period T;

wherein the target time slot is the identification sequence number i of the first RSU divided by the time slot number M _t The remainder obtained; x, T, M _t And i are positive integers.

4. A power control method according to claim 3, characterized in that the number of time slots M _t Determined from the remainder t of dividing x by n; wherein n represents the number of kinds of the transmitting time domain modes; n and t are both positive integers.

5. A power control method according to claim 3, characterized in that the number of time slots M _t Less than the total number of RSUs to be adjusted; the RSU to be adjusted is an RSU in a preset area where the first RSU is located.

6. The power control method of claim 1, wherein the second synchronization signal includes transmit power information for transmitting the second synchronization signal, RSU identification information, and power adjustment range information corresponding to the RSU identification information.

7. A power control method applied to a second RSU, comprising:

8. The power control method according to claim 7, wherein determining target power range information for synchronization signal transmission based on the power adjustment range information comprises:

9. The power control method of claim 8, wherein adjusting the target power range information based on the comparison result comprises:

10. A power control method applied to OMC, comprising:

and sending the target power range information to the second RSU.

11. The power control method according to claim 10, wherein the determining target power range information for synchronization signal transmission according to the power adjustment range information includes:

12. The power control method of claim 11, wherein adjusting the target power range information based on the comparison result comprises:

13. A roadside device, the roadside device being a first RSU, comprising: transceiver, memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the power control method according to any of claims 1 to 6 when executing the computer program.

14. A roadside device, the roadside device being a second RSU, comprising: transceiver, memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the power control method according to any of claims 7 to 9 when executing the computer program.

15. A network side device, comprising: transceiver, memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the power control method according to any of claims 10 to 12 when executing the computer program.

16. A power control apparatus for use in a first road side unit RSU, comprising:

17. A power control apparatus for use with a second RSU, comprising:

18. A power control apparatus for use in an OMC, comprising:

19. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the power control method according to any one of claims 1 to 6, or the steps of the power control method according to any one of claims 7 to 9, or the steps of the power control method according to any one of claims 10 to 12.