CN114641057A

CN114641057A - Power control method and device, road side equipment and network side equipment

Info

Publication number: CN114641057A
Application number: CN202011481158.7A
Authority: CN
Inventors: 刘英浩
Original assignee: Datang Gaohong Zhilian Technology Chongqing Co ltd
Current assignee: Datang Gaohong Zhilian Technology Chongqing Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2022-06-17
Anticipated expiration: 2040-12-15
Also published as: CN114641057B

Abstract

The invention provides a power control method, a power control 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 comprises transmission power information of the second RSU for transmitting the first synchronization signal; determining power adjustment range information according to the first synchronization signal; wherein the power adjustment range information is used for indicating a power adjustment range of the second RSU for transmitting the synchronization signal; sending the power adjustment range information to an operation maintenance center OMC; and/or broadcasting and sending the second synchronous signal in a mode of carrying the power adjustment range information in the second synchronous signal. The scheme of the invention solves the mutual interference between the 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 and apparatus, a roadside device, and a network side device.

Background

Currently, RSU (Road Side Unit) and OBU (On board Unit) of LTE (Long Term Evolution) V2X (Vehicle-to-Everything) broadcast and transmit V2X signals with fixed transmission power. In a scenario without a GNSS (Global Navigation Satellite System) clock synchronization source, typically a tunnel scenario, the synchronization is usually achieved by using an air interface synchronization and positioning technology of the PC 5. At this time, in order to realize air interface synchronization of the PC5, the RSU needs to broadcast and transmit a synchronization signal using fixed time and frequency resources.

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

Disclosure of Invention

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

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 comprises transmission power information of the second RSU for transmitting the first synchronization signal;

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

sending the power adjustment range information to an operation maintenance center OMC; and/or broadcasting and sending the second synchronous signal in a mode of carrying the power adjustment range information in the second synchronous 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 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 the power adjustment range of the second RSU for transmitting 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 an OMC, including:

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

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

sending the target power range information to the second RSU.

In a fourth aspect, an embodiment of the present invention provides a roadside apparatus, 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 executing the computer program.

In a fifth aspect, an embodiment of the present invention provides a roadside apparatus, 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 according to the second aspect when executing the computer program.

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 executing the computer program.

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 synchronization signal sent by the second RSU; wherein the first synchronization signal comprises transmission power information of the second RSU for transmitting the first synchronization signal;

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

the first sending module is used for sending the power adjustment range information to an operation maintenance center OMC; and/or broadcasting and sending the second synchronous signal in a mode of carrying the power adjustment range information in the second synchronous 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 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 the power adjustment range of the second RSU for transmitting 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 an OMC, including:

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

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

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

In a tenth aspect, embodiments of the 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 according to the first aspect, or implements the steps of the power control method according to the second aspect, or implements the steps of the power control method according to 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 the power adjustment ranges are fed back to the OMC or the RSU to control the transmitting power of the RSUs, so that the automatic network optimization of the RSU power is realized, and the mutual interference among the RSUs is effectively solved.

Drawings

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

fig. 2 is 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 flow charts of the power control method of the 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 flow chart of a power control method according to an embodiment of the present invention;

fig. 6 is a block diagram showing a configuration of a power control apparatus according to an embodiment of the present invention;

fig. 7 shows a second block diagram of the power control apparatus according to the embodiment of the 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 configuration block diagrams of the roadside apparatus of the embodiment of the present invention;

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

fig. 11 is a block diagram showing a configuration 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 of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may 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 execution sequence, and the execution sequence of each process should be determined by the function and the inherent logic of the process, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

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

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

In the embodiment of the present invention, 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 Station), 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, a Remote Radio Unit (RRU), a Remote Radio Head (RRH), and the like. The user terminal may be a mobile phone (or handset), or other device capable of sending or receiving wireless signals, including user Equipment, a Personal Digital Assistant (PDA), a wireless modem, a wireless communicator, a handheld device, a laptop computer, a cordless phone, a Wireless Local Loop (WLL) station, a CPE (Customer Premise Equipment) or a mobile smart hotspot capable of converting mobile signals into WiFi signals, a smart appliance, or other devices capable of autonomously communicating with a mobile communication network without human operation, and so on.

A typical network architecture of LTE V2X is shown in fig. 1, where an RSU and an OBU communicate over the air interface of a PC5, and the RSU is connected to an OMC through an ethernet or 4/5G Uu interface.

In the case of good GNSS signals, the RSU and the OBU of LTE V2X are based on GNSS synchronization; in a scenario without a GNSS clock synchronization source (typically, a tunnel scenario), a synchronization scheme based on an air interface signal of the PC5 may be used.

For example, as shown in fig. 2, which is an example of establishing synchronization of RSUs in a tunnel, the RSU0 outside the tunnel transfers GNSS clocks to each RSU in the tunnel step by step after receiving GNSS signals, and determines the accuracy of each RSU clock in the tunnel by eliminating accumulation of idle delay through an algorithm during the transfer. The OBU performs air interface synchronization of the PC5 through the received RSU synchronization signal. Specifically, the RSU0 may receive a GNSS signal for synchronization, and periodically send out an air interface synchronization signal of the PC5, where the synchronization signal includes information such as a synchronization level, a frame number, an RSU ID (Identity), a latitude and longitude, and the like; when the RSU1 is in a scenario without GNSS signal reception, the PC5 air interface synchronization may be performed by receiving a synchronization signal from the RSU0, and after the synchronization is successful, the RSU1 periodically sends out a PC5 air interface synchronization signal; the RSU2 receives the synchronization signal from the RSU1 to perform PC5 air interface synchronization, and performs progressive synchronization to other subsequent RSUs.

At this time, in order to achieve air interface synchronization of the PC5, the RSU transmits the synchronization signal on the air interface of the PC5, which occupies specific time and frequency domain resources, and in order to demodulate the synchronization signal more easily, the synchronization signal is usually transmitted in the frequency domain in full bandwidth. On the other hand, in order to reduce occupation of air interface resources of the PC5, the synchronization signal is transmitted according to a period T (typically, T is 100ms), for example, at the xth ms in each period T. In addition, the PC5 uses PSCCH (PSCCH physical downlink Control Channel) and PSCCH (physical downlink shared Channel) over the air interface, and each RSU cannot receive signals transmitted by other RSUs when transmitting signals. Therefore, in order to shift the time domain transmission windows between RSUs, RSU (i) is usually transmitted according to x (i) i mod M, where M is usually a fixed integer smaller than N, and N is the total number of RSUs in the tunnel. And the OBU cannot send signals in 0-M-1 ms in each period T in order to receive all possible synchronous signals transmitted by the RSU. In this case, if the configuration of M is large, the time domain resources occupied by all the windows for transmitting the synchronization signals by the RSUs in the period T will be too much, which results in the waste of the time domain resources for transmitting the OBU.

In the above synchronization scheme, the same time domain and frequency domain resources are used for RSU (k) and RSU (M + k). When two RSU terminals use the same time domain and frequency domain resources, mutual interference will be caused, so that other RSUs and OBUs fail to decode.

For example, when RSU (i) (k < i < M + k) or OBU is between RSU (k) and RSU (M + k), synchronization signals for 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 received 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 as an interference signal cannot be demodulated; if the signal strength difference of the two received 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 RSUs cannot be used as a synchronization source for synchronization.

In addition, at present, both the RSU and the OBU of LTE V2X broadcast and transmit V2X signals with fixed configured transmission power, which is usually 23dBm maximum defined by the 3GPP protocol, so the signal interference between RSU (k) and RSU (M + k) is relatively severe, and especially, the signal interference is more prominent in a tunnel environment with less signal air interface attenuation.

For RSU synchronization signals that cannot be demodulated, the existing scheme cannot acquire the actually received signal strength, and thus network optimization under networking conditions cannot be performed. Therefore, the RSUs using the same time domain and frequency domain resources can only manually stop sending signals in turn, and the tests need to be repeated manually, and the power adjustment is performed according to the test results after the tests, so that the relevant parameters of the transmitting power of the RSUs can be optimized. Therefore, the power network optimization of the RSUs in the prior art is difficult and tedious, and the problem of mutual interference between the RSUs cannot be effectively solved.

Specifically, embodiments of the present invention provide a power control method, a power control device, a roadside device, and a network side device, which solve the problem in the prior art that power optimization and adjustment of an RSU are 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 comprises transmission power information of the second RSU for transmitting the first synchronization signal.

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

Step 32: determining power adjustment range information according to the first synchronization signal; wherein the power adjustment range information is used for indicating a power adjustment range of the second RSU for transmitting the 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 the 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 and configuration on the first RSU, for example, plan which other RSUs the first RSU needs to receive the synchronization signals transmitted by, so as to determine a distribution range of an RSU for the first RSU, and then determine configuration power range information of each RSU within the distribution range for the first RSU. Here, the configured 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) denotes a first RSU, RSU (j) denotes any RSU within the distribution range, namely, the second RSU, RSRP (i, j) represents the actual power of the first synchronization signal received by the first RSU (the first synchronization signal is sent by the second RSU), pnow (j) is the transmission power obtained by the first RSU demodulating the first synchronization signal (i.e. the transmission power information of the first synchronization signal sent by the second RSU included in the first synchronization signal), the OMC may plan for each RSU (i) the maximum RSRP _ max (i, j) and minimum RSRP _ min (i, j) values of RSUs (i, j) within the distribution that it needs to receive, namely, the OMC plans the configured power range [ RSRP _ min (i, j), RSRP _ max (i, j) ] of rsu (j) for rsu (i), and rsu (i) can obtain the configured power range information about rsu (j) from the OMC.

Rsu (i) power adjustment range information (i.e., recommended power range) for rsu (j) may be obtained by the following formula:

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 transmission power of the first synchronization signal; RSRP (i, j) is the actual power of the first synchronization signal sent by rsu (j) received by rsu (i); RSRP _ max (i, j) is the maximum value of the power range (i.e. the maximum value of the configured power range) required to receive each RSU (i, j) for planning RSU (i); RSRP _ min (i, j) is the minimum value of the power range (i.e. the minimum value of the configured power range) required to be received by each RSU (i, j) for planning RSU (i); pmax is the maximum transmit power configured by the OMC, and may be configured to 23dbm by default, for example; pmin is the minimum transmit power configured by the OMC, and may be configured to 0dbm by default, for example.

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

Here, the first RSU reports power adjustment range information (including Psmax (i, j) and Psmin (i, j)) to the OMC or feeds back 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 an 4/5G Uu port, so that the power adjustment range information is sent to the OMC; the first RSU may broadcast a second synchronization signal, where 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 x-th transmission period T;

the determination method of the target time slot is as follows: determining an emission time domain mode of the xth sending period T according to x; time slot number M corresponding to different transmission time domain modes_tDifferent; the number of time slots M_tThe number of time slots used for transmitting the synchronous signals in one transmission period T; wherein the target time slot is the identifier serial number i of the first RSU divided by the time slot number M_tObtaining a remainder; x, T, M_tAnd i are both positive integers.

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

As an alternative implementation, the synchronization signal is transmitted with a period T, for example, T equals to 100 ms. Specifically, it may be transmitted at the xth ms in each period T. Here, in order to shift the time-domain transmission window between the RSUs, x (i) ═ i mod M may be applied to RSU (i)_tAnd sending the message.

In addition, M is_tIndicating the number of slots used for transmitting the synchronization signal in one transmission period T, and therefore, the number of different slots M_tMay correspond to different transmit time domain modes. For exampleN (at least two) transmission time domain modes can be configured, and the corresponding time slot number M_tCan take the value M₀、M₁、…、M_n-1。

Optionally, the number of time slots M_tDetermined from the remainder t of x divided by n, i.e. M_t＝M_{(x mod n)}. Wherein n represents the number of the types of the transmitting time domain modes; n and t are both positive integers.

It can be seen that the number of time slots M_tThe number of time slots M may be varied according to the number of transmissions x, i.e. the number of time slots M is determined according to the current transmission cycle T_tI.e. determining which time domain mode of transmission is used in the current transmission period T. For example, the mode M is used in the xth transmission period T (i.e., in the xth synchronization signal transmission)_{(x mod n)}。

Optionally, the number of time slots M_tLess than the total number of RSUs to be adjusted; wherein, the RSU to be adjusted is the RSU in the preset area where the first RSU is located, and the time slot number M_tIs a positive integer.

For example, as an alternative embodiment of the present application, n may be set to 2, that is, two transmission time domain modes are configured: m is a group of₀And M₁. When the number of transmission times x is odd, the remainder of x divided by n is 1, and M is_t＝M₁(ii) a When the number of transmission times x is an even number, the remainder of x divided by n is 0, and M_t＝M₀。

It should be noted that, assuming that the total number of RSUs to be adjusted is N, M₁And M₀Generally configured as a fixed integer less than N, M₁And M₀Can be in a relatively prime relationship, i.e. (M)₁，M₀) 1. For example, as a typical configuration, M may be set₀＝M，M₁M + 1. Under the scheme, when two RSUs which use the same time domain resource during odd-numbered transmission times are transmitted, the same time domain resource is not used during even-numbered transmission times, so that the transmission signals of all the RSUs can be ensured to have time domain opportunities not to be interfered by other RSUs.

Based on this principle, the OMC may plan, for each RSU (i), the maximum value RSRP _ max (i, j) of the configured power range and the minimum value RSRP _ min (i, j) of the configured power range that it needs to receive each RSU (i, j).

In this embodiment, for example, in a linear scenario without GNSS coverage, the quality of a synchronization signal sent by each RSU can be automatically detected, and the intensity of a hidden interference signal can be detected by using a resource allocation method with a variable time domain position; after the RSU generating the interference signal is detected, the power adjustment range can be automatically calculated, and then the RSU is issued 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 to reduce network interference. The interference detection and the power adjustment can be automatically executed, manual test optimization is not needed, and network optimization can be rapidly completed, so that mutual interference among RSUs is effectively solved.

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

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

The RSU id information may include ids of multiple RSUs, and the power adjustment range information may include power adjustment range information corresponding to the ids of the RSUs.

The embodiment of the invention can allocate resources based on fixed frequency domain resources and variable time domain positions, determine the power adjustment ranges of different RSUs through the received synchronous signal strengths of the different RSUs, and feed back the power adjustment ranges to the OMC or the RSU to control the transmitting power of the RSUs, 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 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 the 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, obtain power adjustment range information corresponding to the identifier of the second RSU when the RSU identifier information in the parsed synchronization signal includes the identifier of the second RSU, and perform the step of determining the target power range information according to the power adjustment range information; and when the RSU ID carried in the synchronous signal is analyzed to be inconsistent 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 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 the priority of different power adjustment range information according to the distance between a first RSU and a second RSU which send the power adjustment range information; wherein the larger the distance between the first RSU and the second RSU is, the lower the priority of the power adjustment range information transmitted by the first RSU is;

determining the power adjustment range information with 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 sequence 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) denotes a first RSU, and RSU (j) denotes a second RSU. The priorities of different pieces of power adjustment range information can be determined according to the distance between the rsu (i) and the rsu (j) sending the power adjustment range information. The closer rsu (i) is to rsu (j), the higher the priority of the power adjustment range information transmitted by rsu (j) is. After the priority is determined, sequentially comparing the information according to the sequence of the priority from high to low, and adjusting the target power range according to the comparison result until the information of the power adjustment range with the lowest priority is compared, thereby determining the final target power range.

In the 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 power adjustment range information carried in the synchronization signal, thereby completing one-time network power adjustment optimization without additionally adding signaling.

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

adjusting the target power range information to be the same portion of the power adjustment range information as the target power range information, in case the power adjustment range information is the same portion as the target power range information;

in a case where the power adjustment range information and the target power range information do not have the same portion, the target power range information is kept unchanged.

That is, in the above embodiment, if the rsu (i) sent power adjustment range and the current target power range intersect, the current target power range is replaced by the intersection of the two; if there is no intersection, the current target power range is not changed. In this way, according to the order of priority from high to low, all rsus (i) that transmit power adjustment range information are gradually traversed, and the power adjustment range is gradually reduced, so as to obtain the target power range information (i.e. final adjustment power) of 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 by the OMC, so that it can perform power adjustment operation according to the power adjustment range, so as to reduce network interference. The power adjustment can be automatically executed, manual test optimization is not needed, 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 acquired 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 transmission power of the RSUs 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, which is applied to an OMC, and specifically includes the following steps:

step 51: receiving power adjustment range information sent by a first RSU; wherein the power adjustment range information is used for indicating the power adjustment range of the second RSU for transmitting the synchronization 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) denotes a first RSU, and RSU (j) denotes a second RSU. The priorities of different pieces of power adjustment range information can be determined according to the distance between the rsu (i) sending the power adjustment range information and the rsu (j). The closer rsu (i) is to rsu (j), the higher the priority of the power adjustment range information transmitted by rsu (j) is. After the priority is determined, sequentially comparing the information according to the sequence of the priority from high to low, and adjusting the target power range according to the comparison result until the information of the power adjustment range with the lowest priority is compared, thereby determining the final target power range.

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

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

in a 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.

The OMC uses Ethernet or 4/5G Uu as a return link, and configures the target power range information to RSU (j), thereby completing one-time network power adjustment optimization. Thus, the OMC performs power control based on the power suggestion reported by the RSU, so that part of the RSU reduces the transmission power, thereby ensuring that RSU signals in the adjusting range are not interfered.

It should be noted that the OMC may perform planning and configuration on the first RSU, for example, planning and configuring which other RSUs the first RSU needs to receive the synchronization signals transmitted by, so as to determine a distribution range of an RSU for the first RSU, and then determine configuration power range information of each RSU within the distribution range for the first RSU. Here, the configured power range information is configured to avoid mutual interference between RSUs, and indicates a range of actual power of a synchronization signal that the first RSU expects to receive. After obtaining the configured power range information from the OMC, the first RSU may determine the power adjustment range information according to the configured power range information, where the power adjustment range information is used to indicate a power adjustment range in which the second RSU transmits a synchronization signal.

In the embodiment of the application, the power adjustment range information which is sent by the first RSU and aims at the second RSU is received, the target power range of the second RSU is determined according to the power adjustment range information, and the target power range is sent to the second RSU, so that the second RSU can perform power adjustment operation according to the power adjustment range, and network interference is reduced. The power adjustment can be automatically executed, manual test optimization is not needed, 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 comprises transmission power information of the second RSU for transmitting the first synchronization signal;

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

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

Optionally, the first processing module 602 includes:

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

and the second processing unit is used for determining the power adjustment range information according to the transmitting power information, the actual power information and the configuration power range information obtained in advance from the OMC.

Optionally, the power control apparatus 600 further includes:

a third sending module, configured to send a third synchronization signal in a target timeslot of an xth sending period T;

the determination method of the target time slot is as follows:

determining an emission time domain mode of the xth sending period T according to x; time slot number M corresponding to different transmission time domain modes_tDifferent; the number of time slots M_tThe number of time slots for transmitting the synchronization signal in one transmission period T; wherein the target time slot is the identifier serial number i of the first RSU divided by the time slot number M_tObtaining a remainder; x, T, M_tAnd i are both positive integers.

Optionally, the number of time slots M_tDetermining according to a remainder t of x divided by n; wherein n represents the number of the types of the transmitting time domain modes; n and t are both positive integers.

Optionally, the number of time slots M_tLess than the total number of RSUs to be adjusted; and the RSU to be adjusted is the RSU in the preset area where the first RSU is located.

A fourth embodiment of the present invention is corresponding to the method of the first embodiment, and all the implementation means in the first embodiment are applied to the embodiment of the power control apparatus, 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 the power adjustment range of the second RSU for transmitting the synchronization signal;

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

Optionally, the second processing module 702 includes:

a first priority determining unit, configured to determine priorities of different pieces of power adjustment range information according to a distance between a first RSU and a second RSU that transmit the power adjustment range information; wherein the larger the distance between the first RSU and the second RSU is, the lower the priority of the power adjustment range information transmitted 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 sequentially comparing the power adjustment range information with different priorities with the target power range information according to the sequence 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 adjusting unit includes:

a first adjusting subunit, configured to adjust the target power range information to be a same part of the power adjustment range information and the target power range information when the power adjustment range information and the target power range information have the same part;

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.

A fifth embodiment of the present invention is corresponding to the method of the second embodiment, and all the implementation means in the second embodiment are applied to the embodiment of the power control apparatus, and 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 an 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 the power adjustment range of the second RSU for transmitting the synchronization signal;

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

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 pieces of power adjustment range information according to a distance between a first RSU and a second RSU that send the power adjustment range information; wherein the larger the distance between the first RSU and the second RSU is, the lower the priority of the power adjustment range information transmitted 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 sequentially comparing the power adjustment range information with different priorities with the target power range information according to the sequence 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 adjusting unit includes:

a third adjusting subunit, configured to adjust the target power range information to be a same part of the power adjustment range information and the target power range information when the power adjustment range information and the target power range information have the same part;

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 is corresponding to the method of the third embodiment, and all the implementation means in the third embodiment are applied to the embodiment of the power control apparatus, and 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 roadside apparatus, which is a first RSU, including:

a processor 900; and a memory 920 connected to the processor 900 through a bus interface, wherein the memory 920 is used for storing programs and data used by the processor 900 when executing operations, and the processor 900 calls and executes the programs and data stored in the memory 920.

Wherein, the transceiver 910 is connected with the 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 transmitted by the second RSU; wherein the first synchronization signal comprises transmission power information of the second RSU for transmitting the first synchronization signal; the processor 900 is configured to read the program in the memory 920 to perform the following steps:

sending the power adjustment range information to an Operation Maintenance Center (OMC); and/or broadcasting and sending the second synchronous signal in a mode of carrying the power adjustment range information in the second synchronous signal.

In fig. 9, among other things, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 900, and various circuits, represented by memory 920, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any 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. For different terminals, the user interface 930 may also be an interface capable of interfacing with a desired device, 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 the configuration power range information obtained in advance from the OMC.

Optionally, the processor 900 is further configured to transmit a third synchronization signal in a target timeslot of the xth transmission period T; the determination method of the target time slot is as follows: determining an emission time domain mode of the xth sending period T according to x; time slot number M corresponding to different transmission time domain modes_tDifferent; the number of time slots M_tThe number of time slots used for transmitting the synchronous signals in one transmission period T; wherein the target time slot is the identifier serial number i of the first RSU divided by the time slot number M_tObtaining a remainder; x, T, M_tAnd i are both positive integers.

The road side equipment provided by the invention can perform resource allocation 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 perform the transmitting power control of the RSUs, thereby realizing the 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 apparatus, which is a second RSU, including:

a processor 1000; and a memory 1020 connected to the processor 1000 through a bus interface, wherein the memory 1020 is used for storing programs and data used by the processor 1000 when executing operations, and the processor 1000 calls and executes the programs and data stored in the memory 1020.

The transceiver 1010 is connected to the bus interface, and is configured to receive and transmit data under the control of the processor 1000; specifically, the transceiver 1010 is configured to receive a second synchronization signal transmitted by the first RSU; the second synchronization signal comprises power adjustment range information, and the power adjustment range information is used for indicating the power adjustment range of the second RSU for transmitting the synchronization signal.

The processor 1000 is used for reading the program in the memory 1020 and executing the following steps:

Where in fig. 10, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 1000 and memory represented by memory 1020. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any 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. For different terminals, the user interface 1030 may also be an interface capable of interfacing with a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc. 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 pieces of power adjustment range information according to a distance between a first RSU and a second RSU that send the power adjustment range information; wherein the larger the distance between the first RSU and the second RSU is, the lower the priority of the power adjustment range information transmitted 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 determines 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 being used to store programs and data used by the processor 1100 when performing operations, and the processor 1100 calling and executing the programs and data stored in the memory 1120.

Wherein the transceiver 1110 is connected to a 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; wherein the power adjustment range information is used for indicating the power adjustment range of the second RSU for transmitting the synchronization signal.

The processor 1100 is used for reading the program in the memory 1120 and executing the following steps: determining target power range information sent by a synchronous signal according to the power adjustment range information; transmitting the target power range information to the second RSU.

Where in fig. 11, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1100, and various circuits, represented by memory 1120, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any 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. For different terminals, the user interface 1130 may also be an interface capable of interfacing with desired devices, 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 pieces of power adjustment range information according to a distance between a first RSU and a second RSU that send the power adjustment range information; wherein the larger the distance between the first RSU and the second RSU is, the lower the priority of the power adjustment range information transmitted 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 device provided by the invention can determine the target power range of the second RSU according to the power adjustment range information by receiving the power adjustment range information aiming at the second RSU sent by the first RSU, and send the target power range to the second RSU, so that the network side device can carry out power adjustment operation according to the power adjustment range, thereby reducing network interference. The power adjustment can be automatically executed, manual test optimization is not needed, 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 for implementing the above embodiments may be performed by hardware, or may be instructed to be performed by associated hardware by a computer program that includes instructions for performing some or all of the steps of the above methods; and the computer program may be stored in a readable storage medium, which may be any form of storage medium.

In addition, the present invention 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 effect can be achieved, and in order to avoid repetition, the description is omitted.

Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the 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 to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A power control method is applied to a first Road Side Unit (RSU), and is characterized by comprising the following steps:

2. The power control method of claim 1, wherein determining power adjustment range information based on the first synchronization signal comprises:

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 the configuration power range information obtained in advance from the OMC.

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

the determination method of the target time slot is as follows:

determining an emission time domain mode of the xth sending period T according to x; time slot number M corresponding to different transmission time domain modes_tDifferent; the number of time slots M_tIs one transmission weekThe number of time slots used for transmitting the synchronization signal in the period T;

wherein the target time slot is the identifier serial number i of the first RSU divided by the time slot number M_tObtaining a remainder; x, T, M_tAnd i are both positive integers.

4. The power control method of claim 3, wherein the number of time slots M_tDetermining according to a remainder t of x divided by n; wherein n represents the number of the types of the transmitting time domain modes; n and t are both positive integers.

5. The power control method of claim 3, wherein the number of time slots M_tLess than the total number of RSUs to be adjusted; and the RSU to be adjusted is the RSU in the preset area where the first RSU is located.

6. The power control method of claim 1, wherein the second synchronization signal comprises transmission 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 of claim 7, wherein the determining the target power range information of the synchronization signal transmission according to the power adjustment range information comprises:

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

10. A power control method applied to an OMC (open multimedia core) is characterized by comprising the following steps:

transmitting the target power range information to the second RSU.

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

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

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

13. A roadside apparatus, the roadside apparatus 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 realizes the steps of the power control method according to any of claims 1 to 6 when executing the computer program.

14. A roadside apparatus, the roadside apparatus 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 realizes 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 device applied to a first Road Side Unit (RSU), comprising:

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

17. A power control apparatus applied to a second RSU, comprising:

a second receiving module, 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 the power adjustment range of the second RSU for transmitting the synchronization signal;

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

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