WO2018033071A1 - Method and apparatus for collaborative control among wireless access points - Google Patents

Abstract

A method for collaborative control among wireless access points comprises: by using a time-frequency resource corresponding to a first wireless access point, a second wireless access point sends scheduling information to a terminal in a step of macro diversity transmission among wireless access points or a step of time-frequency equivalent replacement transmission among wireless access points.

Description

Wireless access point cooperation control method and device Technical field

The present application relates to, but is not limited to, a cooperative control technology in the field of communication technologies, and in particular, to a method and apparatus for cooperative control between wireless access points.

Background technique

In order to support the high-speed movement of the terminal and realize the flexible cooperation between the wireless access points, it is necessary to quickly acquire the terminal location and the terminal channel state in real time, thereby realizing the rapid transparent migration or transparent movement of the terminal communication link between adjacent wireless access points.

The rapid migration of the communication links between the cells through coordinated transmission between cells is a requirement for the subsequent evolution of the Long Term Evolution (LTE) system. The Coordinated Multiple Point (CoMP) in the LTE system is proposed to improve the transmission rate of the cell edge terminal, which is to increase the signal strength received by the terminal in the edge region. The implementation of CoMP is premised on inter-cell interference coordination. CoMP must implement transmit diversity and multiple-input multiple-output (MIMO) transmission when multi-point interference is circumvented.

Coordinated Scheduling and Beamforming (CS/CB) is an inter-beam coordination technique that dynamically reduces interference from other cells. The data of the UE (User Equipment, terminal) is obtained from the serving node, and the scheduling and beamforming of the user are based on the coordination result between the evolved base stations (eNodeBs) in the CoMP cluster.

The core technology of downlink CoMP is Joint Processing and Transmission (JPT). JPT includes at least two implementation modes: a) dynamic node selection, based on channel status indicator (CSI), dynamic Selecting an eNodeB from a cluster of eNodeBs participating in coordinated transmission for transmitting data to the UE; b) jointly transmitting, dynamically selecting two or more eNodeBs from a cluster of eNodeBs participating in coordinated transmission according to CSI information And for transmitting data to the UE; wherein, the foregoing multiple eNodeBs are simultaneously used to send data to the UE, and are divided into two cases: non-coherent transmission and coherent transmission; a typical manner of non-coherent transmission is transmit diversity; coherent transmission A typical way is MIMO transmission.

From the link control mode of CoMP, one is the control mode of each cell or node used in CoMP transmission in the LTE system, which is characterized by the control issued by each wireless node or cell participating in coordinated multi-point transmission in CoMP. The command is only used to control the data transmission between the cell and the terminal, and does not control the data transmission between the terminal and other nodes participating in the coordinated multi-point transmission. The control command adopted by the CoMP is essentially based on the traditional local cell transmission or The control command of single stream transmission; the other is that one of a group of nodes participating in CoMP acts as a control node, and the control node sends a scheduling instruction to control data transmission of other nodes participating in the COPM transmission.

During soft handover, the mobile station searches all pilot signals to detect Code Division Multiple Access (CDMA) channels and measures their strength; when the mobile station detects the discovery of adjacent pilot signal sets or residual pilot signals When the pilot signal strength exceeds the handover threshold T_ADD, the mobile station transmits a Pilot Strength Measurement Message (PSMM) to the serving base station.

The serving base station sends the PSMM to the Mobile Switching Center (MSC), and the MSC notifies the handover destination base station to arrange a forward traffic channel to the mobile station, and the two base station forward traffic channels will transmit exactly the same except for the power control subchannel. Modulating a symbol, and transmitting, by the serving base station, a Handoff Direction Message (HDM) including a PN (Pseudo-Noise) number, a Forward Traffic Channel Number, and a handover parameter of the handover destination base station, to indicate the mobile station Start switching.

The mobile station adds the PN number of the handover destination base station to the effective pilot set according to the received HDM, and simultaneously demodulates the two base station forward traffic channels, and sends a handover complete message (HCM) after the demodulation is completed.

As the mobile station moves, when the pilot signal strength of the active pilot set is lower than T_DROP, the mobile station initiates the handover removal timer T_TDROP; when the timer T_TDROP expires, the mobile station transmits the PSMM to the two base stations.

After receiving the PSMM, the two base stations send the message to the MSC, and the MSC sends back the corresponding HDM, which is forwarded by the base station to the mobile station, and the mobile station moves the pilot signal out of the active set according to the HDM, and simultaneously transmits the HCM.

Although the soft handover realizes the migration process of the terminal connecting and disconnecting between the wireless nodes in the same frequency cell, the time of the soft handover of the terminal is large, and the time of the physical layer measurement process can reach 200. In milliseconds, in addition, the diversity connection between the traffic channel and the terminal of two adjacent base stations is not always necessary, and this diversity connection limits the flexibility of configuring the time-frequency resources of the traffic channel for the inbound terminal between adjacent base stations. .

It can be seen that the fast transparent migration or transparent movement of the terminal communication link between adjacent wireless access points cannot be achieved at present.

Summary of invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiments of the present invention provide a method and an apparatus for cooperatively controlling between wireless access points, which can ensure fast transparent migration or transparent movement of a terminal between adjacent wireless access points.

In a first aspect, an embodiment of the present application provides a method for cooperatively controlling a wireless access point, which is applied to a network side, where the method includes: using, by a second wireless access point, a time-frequency resource that is equivalent to a first wireless access point, Transmitting the scheduling information to the terminal by the macro-diversity transmission step between the wireless access points or the time-frequency peer-to-peer replacement transmission step between the wireless access points;

The macro diversity transmitting step between the wireless access points includes:

And at least one time interval, the second wireless access point and the first wireless access, in a sequence of time intervals configured for the scheduling information transmission channel of the first wireless access point to the terminal Sending the same scheduling information to the terminal according to time synchronization, frequency synchronization, and symbol synchronization; the scheduling information is used by each of the first wireless access point and the second wireless access point Assigning, to the terminal, a time-frequency resource location of an uplink or downlink traffic channel on at least one of the used time-frequency resources; or

The time-frequency peer-to-peer replacement transmission step between the wireless access points includes:

The first wireless access point interrupts sending scheduling information to the terminal in a time interval sequence configured for the scheduling information transmission channel of the first wireless access point to the terminal, in at least one time interval The second wireless access point sends a schedule to the terminal using a frequency used by the first wireless access point before the at least one time interval in at least one time interval of the time interval sequence information.

In a second aspect, an embodiment of the present application provides a wireless access point cooperation control apparatus, which is applied to a network side, where the apparatus includes:

a macro diversity transmitting module between the wireless access points, configured to perform the second wireless access point in at least one time interval on a time interval sequence configured for a scheduling information transmission channel of the first wireless access point to the terminal Transmitting the same scheduling information to the terminal in a manner of time synchronization, frequency synchronization, and symbol synchronization with the first wireless access point; the scheduling information is used in the first wireless access point and the Assigning, to the terminal, a time-frequency resource location of an uplink or downlink traffic channel on at least one of time-frequency resources used by the second wireless access point;

a time-frequency peer-to-peer replacement transmitting module between the wireless access points, configured to be in a time interval sequence configured for the scheduling information transmission channel of the first wireless access point to the terminal, in at least one time interval, Disclosing, by the first wireless access point, sending scheduling information to the terminal, where the second wireless access point uses the first wireless access point in the office in at least one time interval in the time interval sequence The frequency used before the at least one time interval is used to send scheduling information to the terminal.

In addition, the embodiment of the present application further provides a computer readable medium storing computer executable instructions, where the computer executable instructions are executed by a processor to implement the steps of the wireless access point cooperative control method.

In the embodiment of the present application, the second wireless access point uses the time-frequency resource equivalent to the first wireless access point to replace the transmission by the macro-diversity transmission step between the wireless access points or the time-frequency peer between the wireless access points. The step of transmitting scheduling information to the terminal, implementing peer-to-peer replacement or transparent replacement of the control channel between the first wireless access point and the second wireless access point (the terminal does not perceive the replacement of the generated control channel), thus, The terminal quickly and transparently moves or transparently moves between adjacent wireless access points.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

In the drawings, which are not necessarily to scale, the Like reference numerals with different letter suffixes may indicate different examples of similar components. The drawings generally illustrate the various embodiments discussed herein by way of example and not limitation.

1 is a schematic flowchart of a method for cooperatively controlling wireless access points in an embodiment of the present application;

2a is a schematic diagram of an example of cooperative transmission of a control channel between wireless access points in an embodiment of the present application;

2b is a schematic diagram of another example of cooperative transmission of a control channel between wireless access points in an embodiment of the present application;

FIG. 3 is a schematic diagram of an example of transmitting scheduling information by using a guard band in an LTE channel bandwidth according to an embodiment of the present application;

4 is a schematic flowchart diagram of another example of a method for cooperatively controlling wireless access points in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a wireless access point cooperation control apparatus according to an embodiment of the present application;

FIG. 6 is another schematic structural diagram of a wireless access point cooperation control apparatus according to an embodiment of the present application.

Detailed

In the embodiment of the present application, the time-frequency resource that is peered with the first wireless access point is used by the second wireless access point, and the macro-diversity transmission step between the wireless access points or the time-frequency equivalent between the wireless access points is replaced. The transmitting step sends scheduling information to the terminal; the step of transmitting macro-division diversity between the wireless access points includes: in a time interval sequence configured for the scheduling information transmission channel of the first wireless access point to the terminal, Transmitting, by the second wireless access point and the first wireless access point, the same scheduling information to the terminal according to time synchronization, frequency synchronization, and symbol synchronization in at least one time interval; the scheduling information And assigning, to the terminal, a time-frequency resource location of an uplink or downlink traffic channel, on at least one of time-frequency resources used by each of the first wireless access point and the second wireless access point; The step of time-frequency peer-to-peer replacement of the wireless access point includes: at least one of a time interval sequence configured for a scheduling information transmission channel of the first wireless access point to the terminal The first wireless access point interrupts transmitting scheduling information to the terminal, and the second wireless access point uses the first wireless connection in at least one time interval in the time interval sequence. The entry point transmits scheduling information to the terminal at a frequency used prior to the at least one time interval.

The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is to be understood that the embodiments described herein are merely illustrative of the application and are not intended to be limiting.

FIG. 1 is a flowchart of a method for cooperative control between wireless access points according to an embodiment of the present disclosure. As shown in FIG. 1 , the method for cooperatively controlling wireless access points provided by this embodiment may be applied to the network side, and includes the following steps:

Step 101: The second wireless access point uses a time-frequency resource that is peered with the first wireless access point, and sends the step to the terminal by using a macro-diversity transmission step between the wireless access points or a time-frequency peer-to-peer transmission step between the wireless access points. Scheduling information.

Determining that the second wireless access point is a coordinated control node of the first wireless access point at the current location of the terminal; wherein the first wireless access point communicates with the terminal by using the first time-frequency resource.

Here, the first wireless access point and the second wireless access point may be a cell or a base station, and an access point (AP). The terminal can be a communication device such as a smart phone, a tablet computer, a notebook computer, or a wearable device such as a smart watch.

Step 102: The step of transmitting a macrodiversity between wireless access points, including: in a time interval sequence configured for a scheduling information transmission channel of the first wireless access point to the terminal, in at least one time interval Transmitting, by the second wireless access point and the first wireless access point, the same scheduling information to the terminal according to time synchronization, frequency synchronization, and symbol synchronization; the scheduling information is used in the At least one of the time-frequency resources used by each of the first wireless access point and the second wireless access point, the terminal is assigned a time-frequency resource location of the uplink or downlink traffic channel.

Step 103: The time-frequency peer-to-peer replacement transmitting step between the wireless access points includes: at least one time interval sequence configured for the scheduling information transmission channel of the first wireless access point to the terminal Within the time interval, the first wireless access point interrupts transmitting scheduling information to the terminal, and the second wireless access point uses the first wireless connection in at least one time interval in the sequence of time intervals. The entry point transmits scheduling information to the terminal at a frequency used prior to the at least one time interval.

In implementation, the sending the scheduling information to the terminal may include the following steps: the second wireless access point may send a signal carrying the scheduling information to the terminal by using the same channel code or pseudo-random sequence as the first wireless access point. Illustratively, the second wireless access point may transmit a signal carrying the scheduling information to the terminal using the same cell scrambling code as the first wireless access point or a pseudo-random sequence characterizing the cell.

In practice, the second wireless access point needs to know the time interval sequence configured by the first wireless access point to the scheduling information transmission channel of the terminal.

Referring to FIG. 2a, the first time interval sequence configured for the scheduling information transmission channel of the first wireless access point 201 to the first terminal 210 includes: a time interval A, a time interval B, and a time interval C;

The second time interval sequence includes a time interval a, a time interval b, and a time interval c.

The time interval a corresponds to the time interval A, the time interval a is synchronized with the time interval A at the start and end time or overlaps with the duration; the time interval b corresponds to the time interval B, and the time interval b is synchronized with the time interval B at the start and end time or The duration overlaps; the time interval c corresponds to the time interval C, and the time interval c and the time interval C are synchronized in the start and end time or overlap in duration.

When the scheduling information is transmitted by the inter-radio access point macrodiversity transmitting step described in step 102, the second radio access point 202 is in the second time interval including the time interval a to the time interval c corresponding to the first time interval sequence. Sequencely, the same scheduling information is sent to the first terminal in a manner of time synchronization, frequency synchronization, and symbol synchronization with the first wireless access point.

When the scheduling information is transmitted by the inter-radio access point time-frequency peer-to-peer transmission step described in step 103, the first radio access point 201 transmits scheduling information in the time interval A included in the first time interval sequence, at the first time. The scheduling information is not transmitted in the time intervals B and C after the time interval A included in the interval sequence, and the second wireless access point 202 does not transmit the scheduling information in the time interval a corresponding to the time interval A, corresponding to the time interval B. The scheduling information is transmitted to the first terminal 210 within the time interval b. The frequency used by the second wireless access point 202 to transmit scheduling information in the time interval b is the same as the frequency used by the first wireless access point 201 to transmit scheduling information in the time interval A.

In this embodiment, the second wireless access point uses the time-frequency resource equivalent to the first wireless access point to replace the transmitting step with the macro-diversity transmission step between the wireless access points or the time-frequency peer between the wireless access points. The terminal sends scheduling information to implement peer-to-peer replacement or peer-to-peer migration or transparent replacement of the control channel between the wireless access points (the terminal does not perceive the replacement channel of the generated control channel), so that the terminal can be connected in the adjacent wireless connection. Fast transparent migration or transparent movement between in points.

In an exemplary embodiment, the method for transmitting scheduling information to the terminal in the wireless access point cooperation control method provided in this embodiment may include: sending a time window or an access point in the same predetermined cell identification information. Within the identification information transmission time window, the second wireless access point and the first wireless access point respectively transmit respective cell identification information or access point identification information using the same frequency.

Here, the cell identification information transmission time window or the access point identification information transmission time window is occupied. a time resource in a time interval sequence configured by the first wireless access point to the scheduling information transmission channel of the terminal, or occupying a time interval sequence configured by the first wireless access point to the scheduling information transmission channel of the terminal Time resources.

The cell or access point identification information may include at least one or a combination of the following:

Cell or wireless access point identification information;

Current transmit power information of the cell or the wireless access point;

Band information supported by a cell or a wireless access point;

Current spectrum usage status information of the cell or the wireless access point;

Current channel configuration status information of the cell or wireless access point.

In practice, in the same predetermined cell identification information transmission time window or access point identification information transmission time window, the second wireless access point and the first wireless access point respectively send the respective cells or the same frequency using the same frequency. An exemplary embodiment of the in-point identification information includes: the second wireless access point and the first wireless access point respectively transmit respective cell or access point identification information using frequencies within the LTE channel bandwidth; illustratively, The second wireless access point and the first wireless access point transmit respective cell or access point identification information using a guard band within the LTE channel bandwidth.

Referring to FIG. 2b, T1 and T2 are cell or access point identification information transmission time windows configured on the air interface of the first wireless access point 201, and t1 and t2 are cells configured on the air interface of the second wireless access point 202. Or the access point identification information transmission time window; the cell or access point identification information transmission time window T1 and t1 are synchronized at the start and end time or overlap in duration, and T2 and t2 are synchronized at the start and end time or overlap in duration; Transmitting cell or access point identification information using at least one of a cell or access point identification information transmission time window T1 and t1, T2, and t2; identifying information transmission time windows T1 and t1, T2, and t2 at the cell or access point In any one of the pair of time windows, the first wireless access point 201 and the second wireless access point 202 transmit respective cell or access point identification information using the same frequency; for example, the first wireless access point 201 is in the cell Or the access point identification information transmission time window T1, and the second wireless access point 202 transmits the respective cell or access point identification information using the same frequency in the cell or access point identification information transmission time window t1.Illustratively, at least one of T1, T2 is included in the time range of time interval A, and at least one of t1, t2 is included in the time range of time interval a.

In this embodiment, different cell or access point identification signals are synchronously transmitted in the same time frequency window between adjacent wireless access points, and the terminal acquires identification information and signal strength of different wireless access points in the same time frequency window. The information overcomes the inability to quickly acquire the potential channel state between the terminal and the wireless access point in real time, and cannot realize the short transparent migration or transparent movement of the terminal communication link between adjacent wireless access points, and is easy to realize the wireless connection of the terminal. High-speed movement between in points.

In an exemplary embodiment, the method for transmitting scheduling information to the terminal in the wireless access point cooperation control method provided in this embodiment may include:

When at least one of the first wireless access point and the second wireless access point is a macro cell access point, the first wireless access point and the second are opened on the first frequency band used by the macro cell access point. a time-frequency window used by the downlink access channel of the wireless access point; the first wireless access point and the second wireless access point transmit scheduling information in a time-frequency window; the scheduling information is used in a frequency band used by the second wireless access point Assigning the time-frequency resource location of the traffic channel to the terminal; or

In the second frequency band used by the single frequency network composed of the first wireless access point and the second wireless access point, when the first wireless access point and the second wireless access point downlink control channel are used for use a frequency window; the first wireless access point and the second wireless access point send scheduling information in a time-frequency window; the scheduling information is used to allocate a time-frequency resource of the service channel to the terminal in a frequency band used by the second wireless access point position.

In practice, the time-frequency window includes, in time, a time interval configured for the first wireless access point or the second wireless access point to the scheduling information transmission channel of the terminal.

In this embodiment, in order to flexibly use the spectrum, a time-frequency window used by the downlink control channel for transmitting scheduling information by the first and second wireless access points is opened on the first frequency band, or the first and second wireless connections are used. The first frequency band used by the single frequency network composed of the ingress points opens a time-frequency window used by the downlink control channel for transmitting scheduling information by the first and second wireless access points, wherein the time-frequency window is on the first frequency band The location includes, as shown in FIG. 3, the time-frequency window is opened on the guard bands 421 and 422 set in the LTE channel bandwidth; the guard band set in the LTE channel bandwidth includes at least one of the following: a guard band in the LTE uplink channel bandwidth The guard band within the LTE downlink channel bandwidth. Illustratively, a method of opening a time-frequency window used by a downlink control channel for transmitting scheduling information may include: when at least one of resource blocks 411 and 412 is used as a downlink control channel for the first and second wireless access points The frequency resource occupied by the frequency window.

LTE system supports different channel bandwidth (BW Band) in LTE There are multiple ways of the number of resource blocks in the corresponding transmission bandwidth configuration (NRB, Number of Resource Block) and the Guard band bandwidth in the LTE channel. Among them, one resource block (RB, Resource) The width of Block is: 15 kHz × 12 = 180 kHz.

The embodiment further provides a method for receiving the measurement report information or the service request information sent by the terminal by using the uplink channel, which may include:

Generating a time-frequency window for use by the first and second wireless access point uplink control channels on the first frequency band, at least one of the first and second wireless access points receiving the first terminal in the time-frequency window Measuring reported information or business request information; or,

Generating a time-frequency window for use by the first wireless access point uplink control channel, the first and second wireless accesses, on a second frequency band used by the diversity receiving channel consisting of the first and second wireless access points At least one of the points receives measurement report information or service request information of the first terminal within the time-frequency window.

In an exemplary embodiment, referring to FIG. 4, the method for cooperatively controlling wireless access points provided by this embodiment may further include a method for determining a state of potential cooperative control between wireless access points, which may include the following steps:

Step 401: Acquire measurement information of an identification information bearer signal of at least two wireless access points in a cell or access point identification information transmission time window reported by the terminal, where at least two wireless access points include at least a first wireless connection Incoming point and second wireless access point;

Step 402: Determine whether the amplitude or power of the identification information bearer signal of the second wireless access point is greater than the amplitude or power of the identification information bearer signal of the first wireless access point; and determine the second wireless access point. When the amplitude or power of the identification information carrying signal is greater than the amplitude or power of the identification information carrying signal of the first wireless access point, determining the second wireless access point as the potential cooperative control of the first wireless access point at the current location of the terminal Node; or,

Determining whether the amplitude or power of the identification information carrying signal of the second wireless access point is greater than a first threshold; and determining that the amplitude or power of the identification information carrying signal of the second wireless access point is greater than the first threshold, The wireless access point is determined to be a potential cooperative control node of the first wireless access point at the current location of the terminal.

The determining, by the second wireless access point, the amplitude of the identification information carrying signal is greater than the amplitude of the identification information carrying signal of the first wireless access point; determining the second wireless access point identifying information carrying signal When the amplitude is greater than the amplitude of the identification information carrying signal of the first wireless access point, determining the second wireless access point as a potential cooperative control node of the first wireless access point at the current location of the terminal; or

Determining whether the power of the identification information bearer signal of the second wireless access point is greater than the power of the identification information bearer signal of the first wireless access point; determining that the power of the identification information bearer signal of the second wireless access point is greater than When the identification information of the first wireless access point carries the power of the signal, the second wireless access point is determined as a potential cooperative control node of the first wireless access point at the current location of the terminal; or

Determining whether the amplitude of the identification information carrying signal of the second wireless access point is greater than a first threshold; and determining that the amplitude of the identification information carrying signal of the second wireless access point is greater than the first threshold, the second wireless access point Determining as a potential cooperative control node of the first wireless access point at the current location of the terminal; or

Determining whether the power of the identification information carrying signal of the second wireless access point is greater than a first threshold; and determining that the power of the identification information carrying signal of the second wireless access point is greater than the first threshold, the second wireless access point A potential cooperative control node determined to be the first wireless access point at the current location of the terminal.

Step 403: Send scheduling information to the terminal by using the second wireless access point.

Comparing the amplitude or power of the first wireless access point and the second wireless access point identification information, if the amplitude or power of the identification information of the second wireless access point is greater than the first wireless access point The identification information carries the amplitude or power of the signal, and the second wireless access point is determined as a potential cooperative control node at the current location of the first terminal, and the scheduling information is sent to the first terminal by the second wireless access point; Otherwise, the second wireless access point is determined as a non-potential cooperative control node in the current location of the first terminal, and the scheduling information is not sent to the first terminal by using the second wireless access point; or

Comparing the amplitude or power of the first wireless access point identification information bearer signal with the first threshold, if greater than the first threshold, determining the second wireless access point as a potential cooperative control node at the current location of the first terminal And sending the scheduling information to the first terminal by using the second wireless access point; otherwise, determining that the second wireless access point is a non-potential cooperative control node in the current location of the first terminal, The second wireless access point transmits scheduling information to the first terminal. Illustratively, the first threshold value may be greater than or equal to -80 dBm.

The method for judging the potential cooperative control state between the wireless access points provided by the embodiment overcomes the shortcoming that the potential cooperation state between the adjacent wireless access points for a specific mobile terminal cannot be quickly determined, and the terminal is easily implemented at the wireless access point. High speed movement between.

In an exemplary embodiment, the embodiment provides a method for performing synchronization control between wireless access points, which may include the following steps:

Obtaining, respectively, an arrival phase of the first narrowband synchronization measurement signal sent by the first wireless access point, and an arrival phase of the second narrowband synchronization measurement signal sent by the second wireless access point, where the first narrowband synchronization measurement signal and The bandwidth of the second narrowband synchronization measurement signal is less than 1 MHz;

Determining, according to the arrival phase of the first narrowband synchronization measurement signal and the arrival phase of the second narrowband synchronization measurement signal, the phase of the first narrowband synchronization measurement signal leaving the first wireless access point transmit antenna interface and the second narrowband synchronization measurement signal leaving a phase difference between phases when the second wireless access point transmits the antenna interface;

When the phase difference is greater than a predetermined phase error threshold, the start time of the radio frame transmitted by the first wireless access point or the second wireless access point is adjusted.

In practice, the method for performing synchronization control between wireless access points provided in this embodiment may further include any one of the following implementation manners:

Implementation 1), based on the synchronization control method of the arrival time difference, using the broadband synchronous measurement signal to perform the air interface synchronization control between the wireless access points, including:

The first broadband synchronization measurement signal sent by the first wireless access point is received by the time of arrival measurement unit located at the second wireless access point, and the second broadband synchronization measurement signal sent by the second wireless access point is located at the first wireless connection. Receiving, by the arrival time measuring unit at the in-point, that the bandwidth of the first broadband synchronization measurement signal and the second broadband synchronization measurement signal is greater than 1.25 MHz, and the arrival time measurement unit at the second wireless access point acquires the first broadband synchronization measurement signal. At the arrival time TOA1, the arrival time measuring unit at the first wireless access point acquires the arrival time TOA2 of the second broadband synchronization measurement signal; using the arrival time TOA1, TOA2 and the first wireless access point and the second wireless access point The distance between the first and second broadband synchronization measurement signals leaving the first and second wireless access point transmitting antennas The time difference between time T1 and T2 (T1-T2), when the time difference (T1-T2) is greater than a predetermined synchronization error threshold, the start time of the radio frame transmitted by the first or second wireless access point is adjusted, so that The time difference (T1-T2) is less than a predetermined synchronization error threshold; or,

The first broadband synchronization measurement signal sent by the first wireless access point is received by the arrival time measurement unit located in the area effectively covered by the second wireless access point, and the second broadband synchronization measurement signal sent by the second wireless access point is located. Receiving, by an arrival time measuring unit in an area that is effectively covered by the first wireless access point, the position of the arrival time measuring unit relative to the first and second wireless access points is known, and the first and second broadband synchronization measurement signals are The bandwidth is greater than 1.25 MHz, and the arrival time measuring unit acquires the arrival times TOA1 and TOA2 of the first and second broadband synchronization measurement signals; using the arrival time TOA1, TOA2 and the arrival time measurement unit to the first wireless access point and the second wireless access The distance between the points determines the time difference (T1-T2) between the time T1 and T2 when the first and second broadband synchronous measurement signals leave the transmitting and receiving antenna faces of the first and second wireless access points, when the time difference (T1-T2) When the synchronization error threshold is greater than the predetermined synchronization error threshold, the start time of the radio frame sent by the first or second radio access point is adjusted so that the time difference (T1-T2) is less than the predetermined synchronization error threshold. For example, the value of the synchronization error threshold in the implementation mode 1 may be less than or equal to 10 microseconds; or the value of the synchronization error threshold may be a value less than or equal to 1 microsecond; or, the synchronization error threshold is taken. The value can be a value less than or equal to 0.01 microseconds.

Implementation 2), based on the synchronization control method of reaching the phase difference, using the narrowband synchronous measurement signal to perform the air interface synchronization control between the wireless access points, including:

The first narrowband synchronization measurement signal sent by the first wireless access point is received by the arrival phase measurement unit located at the second wireless access point, and the second narrowband synchronization measurement signal sent by the second wireless access point is located at the first wireless connection. The arrival phase measurement unit at the in-point receives, the bandwidth of the first narrowband synchronization measurement signal and the second narrowband synchronization measurement signal is less than 1 MHz, and the first and second narrowband synchronization measurement signals are a sinusoidal amplitude modulation signal, a Gaussian amplitude modulation signal, and a Sinc amplitude modulation. Any one of the signals, the arrival phase measurement unit at the second wireless access point acquires a phase of arrival POA1 (Phase Of Arrival) of the first narrowband synchronization measurement signal, and the arrival phase measurement unit at the first wireless access point acquires The phase of arrival of the second synchronization measurement signal POA2 (Phase Of Arrival); in the arrival phase POA1, POA2, the propagation phase shift introduced by the distance between the first wireless access point and the second wireless access point is removed, and the first phase is obtained. The phase of the two narrowband synchronous measurement signals leaving the first and second wireless access point transmitting antennas The phase difference (P1-P2) between P1 and P2, when the phase difference (P1-P2) is greater than a predetermined phase error threshold, the start time of the radio frame transmitted by the first or second wireless access point is adjusted, Making the phase difference (P1-P2) smaller than a predetermined synchronization error threshold; or

The first narrowband synchronization measurement signal sent by the first wireless access point is received by the arrival phase measurement unit located in the area effectively covered by the second wireless access point, and the second narrowband synchronization measurement signal sent by the second wireless access point is located. Receiving a phase measurement unit in an area that is effectively covered by the first wireless access point, the position of the arrival phase measurement unit relative to the first and second wireless access points is known, the first and second narrowband synchronization measurement signals The bandwidth of the first and second narrowband synchronization measurement signals is any one of a sine amplitude modulation signal, a Gaussian amplitude modulation signal, and a sinc amplitude modulation signal, and the arrival phase measurement unit at the second wireless access point acquires the first narrowband synchronization. The arrival phase POA1 of the measurement signal, the arrival phase measurement unit at the first wireless access point acquires the arrival phase POA2 of the second narrowband synchronization measurement signal; and removes the first wireless access point and the second in the arrival phase POA1, POA2 Propagation phase shift introduced by the distance between the wireless access points, obtaining the first and second narrowband synchronous measurement signals leaving the first and second wireless access point transmitting antennas The phase difference (P1-P2) between the phases P1 and P2 of the face, the start of the radio frame transmitted to the first or second wireless access point when the phase difference (P1-P2) is greater than a predetermined phase error threshold The time is adjusted such that the phase difference (P1-P2) is less than a predetermined synchronization error threshold. In practice, the value of the phase error threshold in the implementation mode 2 may be a value less than or equal to 2 degrees; or the value of the synchronization error threshold may be a value less than or equal to 0.2 degrees; or, the value of the synchronization error threshold It can be a value less than or equal to 0.02 microseconds. The period of a sine wave signal corresponds to 360 degrees.

In this embodiment, by using a narrowband signal to implement air interface synchronization between adjacent wireless access points, the complexity and cost of synchronization can be reduced.

Illustratively, the bandwidth of the first and second narrowband synchronization measurement signals is 200 KHz; exemplarily, the first and second narrowband synchronization measurement signals and the Narrow Band-Internet Of Things are time-divisionally Share the same carrier frequency.

The method for performing synchronization control between wireless access points provided by this embodiment overcomes the problem that the potential channel state between the terminal and the wireless access point cannot be quickly obtained in real time, and the terminal communication link cannot be quickly connected between adjacent wireless access points. The disadvantage of transparent migration or transparent movement makes it easy to achieve high-speed movement of terminals between wireless access points.

The embodiment also describes a wireless access point cooperation control device, which can be applied to the network side; the wireless access point cooperation control device can be implemented in various manners, for example, implementing a device in a base station or a wireless access point. All components, or components in the device are implemented in a coupled manner on the base station or wireless access point side. Referring to FIG. 5, the wireless access point cooperation control apparatus 510 includes:

The inter-radio access point macrodiversity transmitting module 501 is configured to, in the time interval sequence configured for the scheduling information transmission channel of the first radio access point to the terminal, in the at least one time interval, the second radio access And transmitting, by the first wireless access point, the same scheduling information to the terminal according to time synchronization, frequency synchronization, and symbol synchronization; the scheduling information is used in the first wireless access point and the Assigning, to the terminal, a time-frequency resource location of an uplink or downlink traffic channel, on at least one of time-frequency resources used by each of the second wireless access points;

The inter-radio access point-to-time peer-to-peer replacement transmitting module 502 is configured to be in a time interval sequence configured for the scheduling information transmission channel of the first wireless access point to the terminal, in at least one time interval, Transmitting, by the first wireless access point, scheduling information to the terminal, where the second wireless access point uses the first wireless access point in at least one time interval in the time interval sequence The frequency used before the at least one time interval sends scheduling information to the terminal.

In this embodiment, the second wireless access point uses the time-frequency resource that is equivalent to the first wireless access point, and replaces the transmitting module with the time-frequency peer between the wireless access point macro-diversity transmitting module and the wireless access point. The terminal sends the scheduling information to implement the peer-to-peer replacement or peer-to-peer migration of the control channel between the wireless access points, so as to realize the non-perceived (transparent) transfer between the adjacent wireless access points, so that the terminal can ensure the adjacent wireless connection. Fast transparent migration or transparent movement between in points.

On the basis of the foregoing embodiment, the inter-radio access point macro-diversity transmitting module 501 or the inter-radio access point-to-time peer-to-peer replacement transmitting module 502 may be configured to: pass the second wireless access point. And transmitting, by using the same channel code or pseudo-random sequence as the first wireless access point, a signal carrying the scheduling information to the terminal.

On the basis of the foregoing embodiment, the inter-radio access point macrodiversity transmitting module 501 or the inter-radio access point-to-peer replacement transmitting module 502 may be configured to be in the same predetermined cell or access. In the point identification information transmission time window, the same frequency is used to transmit respective cell or access point identification information on the second wireless access point and the first wireless access point; wherein The cell or access point identification information transmission time window occupies the time resource in the time interval sequence configured by the first wireless access point to the scheduling information transmission channel of the terminal, or occupies the first wireless A time resource outside the time interval sequence configured by the access point to the scheduling information transmission channel of the terminal.

On the basis of the foregoing embodiment, the wireless access point macro diversity transmitting module 501 or the wireless access point time-frequency peer-to-peer replacement transmitting module 502 may be configured to: at the second wireless access point And transmitting respective cell or access point identification information to the first wireless access point using frequencies within the LTE channel bandwidth.

On the basis of the foregoing embodiment, the inter-radio access point macro-diversity transmitting module 501 or the inter-radio access point-to-peer replacement transmitting module 502 may be configured to:

When at least one of the first wireless access point and the second wireless access point is a macro cell access point, the first frequency band used by the downlink channel of the macro cell access point is opened up a time-frequency window used by the first wireless access point and the second wireless access point downlink control channel; the first wireless access point and the second wireless access point are sent in the time-frequency window Scheduling information; the scheduling information is used to allocate a time-frequency resource location of the traffic channel to the terminal in a frequency band used by the second wireless access point; or

Generating, for the second frequency band used by the single frequency network composed of the first wireless access point and the second wireless access point, for the first wireless access point and the second wireless connection a time-frequency window used by the in-point downlink control channel; the first wireless access point and the second wireless access point transmitting scheduling information in the time-frequency window.

On the basis of the structure shown in FIG. 5, this embodiment further describes another wireless access point cooperation control device. Referring to FIG. 6, the wireless access point cooperation control device 610 shown in FIG. 6 also includes: The in-point macro-diversity transmitting module 501 and the inter-radio access point time-frequency peer-to-peer replace the transmitting module 502, and the modules also have the functions and connection relationships shown in FIG. 5; meanwhile, the radio access shown in FIG. The inter-point cooperation control device 610 may further include:

The potential cooperative control state judging module 601 between the wireless access points is configured to:

And acquiring, by the terminal, the measurement information of the identification information bearer signal of the at least two wireless access points in the cell or access point identification information sending time window, where the at least two wireless access points include at least the first a wireless access point and the second wireless access point;

Determining whether the amplitude or power of the identification information carrying signal of the second wireless access point is greater than the amplitude or power of the identification information carrying signal of the first wireless access point; determining the identification of the second wireless access point When the amplitude or power of the information carrying signal is greater than the amplitude or power of the identification information carrying signal of the first wireless access point, determining the second wireless access point as the first wireless access point at the current location of the terminal a potential cooperative control node, and sending the scheduling information to the terminal by using the second wireless access point; or

Determining whether the amplitude or power of the identification information carrying signal of the second wireless access point is greater than a first threshold; when determining that the amplitude or power of the identification information carrying signal of the second wireless access point is greater than the first threshold, The second wireless access point determines that the first wireless access point is a potential coordinated control node in the current location of the terminal, and sends the scheduling information to the terminal by using the second wireless access point.

Illustratively, the device 610 may further include: a wireless access point synchronization control module 602 configured to:

Obtaining, respectively, an arrival phase of the first narrowband synchronization measurement signal sent by the first wireless access point, and an arrival phase of the second narrowband synchronization measurement signal sent by the second wireless access point, where the first narrowband The bandwidth of the synchronous measurement signal and the second narrowband synchronous measurement signal is less than 1 MHz;

Determining, according to an arrival phase of the first narrowband synchronization measurement signal and an arrival phase of the second narrowband synchronization measurement signal, a phase when the first narrowband synchronization measurement signal leaves the transmission plane surface of the first wireless access point a phase difference between a phase when the second narrowband synchronization measurement signal leaves the second wireless access point transmitting antenna port face;

And adjusting a start time of a radio frame sent by the first wireless access point or the second wireless access point when the phase difference is greater than a predetermined phase error threshold.

In practical applications, the macro-division transmitting module 501 between the wireless access points, the time-frequency peer-to-peer replacement transmitting module 502 between the wireless access points, the potential cooperative control state judging module 601 between the wireless access points, and the synchronization control between the wireless access points Module 602 can each be implemented by a central processing unit (CPU), a microprocessor (MPU), an application specific integrated circuit (ASIC), or a field programmable gate array (FPGA) located in a cooperative control device between wireless access points.

This embodiment describes a computer readable medium, which may be a ROM (eg, a read only memory, a FLASH memory, a transfer device, etc.), a magnetic storage medium (eg, a magnetic tape, a disk drive, etc.), Optical storage medium (eg, CD-ROM, DVD-ROM, paper card, paper tape, etc.) and other well-known types of program memory; computer-readable medium storing computer-executable instructions that, when executed, cause at least one processing The device performs the following operations:

The second wireless access point uses the time-frequency resource that is peered with the first wireless access point, and sends the scheduling information to the terminal by the macro-diversity transmission step between the wireless access points or the time-frequency peer-to-peer transmission step between the wireless access points;

The step of transmitting a macrodiversity between wireless access points is: in a sequence of time intervals configured for a scheduling information transmission channel of the first wireless access point to the terminal, in at least one time interval, the first Transmitting, by the second wireless access point, the same scheduling information to the terminal according to time synchronization, frequency synchronization, and symbol synchronization; the scheduling information is used in the first wireless connection And assigning, by the at least one of the time-frequency resources used by the ingress point and the second wireless access point, the time-frequency resource location of the uplink or downlink traffic channel to the terminal;

The step of transmitting the time-frequency peer-to-peer alternately between the wireless access points is: in a time interval sequence configured for the scheduling information transmission channel of the first wireless access point to the terminal, in at least one time interval, Transmitting, by the first wireless access point, scheduling information to the terminal, where the second wireless access point uses the first wireless access point in at least one time interval in the time interval sequence The frequency used before the at least one time interval sends scheduling information to the terminal.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Accordingly, the application can take the form of a hardware embodiment, a software embodiment, or an embodiment in combination with software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and functional blocks/units of the methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical The components work together. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer readable medium, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and nonvolatile, implemented in any method or technology for storing information, such as computer readable instructions, data structures, program modules or other data. Sex, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or may Any other medium used to store the desired information and that can be accessed by the computer. Moreover, it is well known to those skilled in the art that communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media. .

The above is only an exemplary embodiment of the present application, and is not intended to limit the scope of the present application.

Claims (15)

A method for cooperatively controlling wireless access points is applied to a network side, and the method includes: The second wireless access point uses the time-frequency resource that is peered with the first wireless access point, and sends the scheduling information to the terminal by the macro-diversity transmission step between the wireless access points or the time-frequency peer-to-peer transmission step between the wireless access points; The macro diversity transmitting step between the wireless access points includes: And at least one time interval, the second wireless access point and the first wireless access, in a sequence of time intervals configured for the scheduling information transmission channel of the first wireless access point to the terminal Sending the same scheduling information to the terminal according to time synchronization, frequency synchronization, and symbol synchronization; the scheduling information is used by each of the first wireless access point and the second wireless access point Assigning, to the terminal, a time-frequency resource location of an uplink or downlink traffic channel on at least one of the used time-frequency resources; The time-frequency peer-to-peer replacement transmission step between the wireless access points includes: The first wireless access point interrupts sending scheduling information to the terminal in a time interval sequence configured for the scheduling information transmission channel of the first wireless access point to the terminal, in at least one time interval The second wireless access point sends a schedule to the terminal using a frequency used by the first wireless access point before the at least one time interval in at least one time interval of the time interval sequence information. The method of claim 1, wherein the transmitting the scheduling information to the terminal comprises: the second wireless access point using the same channel code or pseudo-random sequence as the first wireless access point to The terminal transmits a signal carrying the scheduling information. The method according to claim 1 or 2, wherein the transmitting the scheduling information to the terminal comprises: in the same predetermined cell or access point identification information transmission time window, the second wireless access point and the location The first wireless access point separately transmits respective cell or access point identification information using the same frequency; wherein the cell or access point identification information transmission time window occupies the first wireless access point to the The time resource in the time interval sequence configured by the scheduling information transmission channel of the terminal, or the time resource other than the time interval sequence configured by the first wireless access point to the scheduling information transmission channel of the terminal. The method according to claim 3, wherein said second wireless access point is used in the same predetermined cell or access point identification information transmission time window as said first wireless access point The frequency respectively sends the respective cell or access point identification information, including: The second wireless access point and the first wireless access point respectively transmit respective cell or access point identification information using frequencies within a Long Term Evolution LTE channel bandwidth. The method according to claim 1 or 2, wherein the sending the scheduling information to the terminal comprises: When at least one of the first wireless access point and the second wireless access point is a macro cell access point, the first frequency band used by the downlink channel of the macro cell access point is opened up a time-frequency window used by the first wireless access point and the second wireless access point downlink control channel; the first wireless access point and the second wireless access point are sent in the time-frequency window Scheduling information; the scheduling information is used to allocate a time-frequency resource location of the traffic channel to the terminal in a frequency band used by the second wireless access point; or Generating, for the second frequency band used by the single frequency network composed of the first wireless access point and the second wireless access point, for the first wireless access point and the second wireless connection a time-frequency window used by the in-point downlink control channel; the first wireless access point and the second wireless access point transmitting scheduling information in the time-frequency window. The method of claim 1 further comprising: And acquiring, by the terminal, the measurement information of the identification information bearer signal of the at least two wireless access points in the cell or access point identification information sending time window, where the at least two wireless access points include at least the first a wireless access point and the second wireless access point; Determining whether the amplitude or power of the identification information carrying signal of the second wireless access point is greater than the amplitude or power of the identification information carrying signal of the first wireless access point; determining the identification of the second wireless access point When the amplitude or power of the information carrying signal is greater than the amplitude or power of the identification information carrying signal of the first wireless access point, determining the second wireless access point as the first wireless access point at the current location of the terminal a potential cooperative control node, and sending the scheduling information to the terminal by using the second wireless access point; or Determining whether the amplitude or power of the identification information bearer signal of the second wireless access point is greater than a first threshold; determining that the second wireless access point is the first wireless access point at the terminal when determining that the amplitude or power of the identification information carrying signal of the second wireless access point is greater than the first threshold a potential cooperative control node under the current location, and transmitting the scheduling information to the terminal by using the second wireless access point. The method of claim 1 further comprising: Obtaining, respectively, an arrival phase of the first narrowband synchronization measurement signal sent by the first wireless access point, and an arrival phase of the second narrowband synchronization measurement signal sent by the second wireless access point, where the first narrowband The bandwidth of the synchronous measurement signal and the second narrowband synchronous measurement signal is less than 1 MHz; Determining, according to an arrival phase of the first narrowband synchronization measurement signal and an arrival phase of the second narrowband synchronization measurement signal, a phase when the first narrowband synchronization measurement signal leaves the transmission plane surface of the first wireless access point a phase difference between a phase when the second narrowband synchronization measurement signal leaves the second wireless access point transmitting antenna port face; And adjusting a start time of a radio frame sent by the first wireless access point or the second wireless access point when the phase difference is greater than a predetermined phase error threshold. A wireless access point cooperation control device is applied to a network side, and the device includes: a macro diversity transmitting module between the wireless access points, configured to perform the second wireless access point in at least one time interval on a time interval sequence configured for a scheduling information transmission channel of the first wireless access point to the terminal Transmitting the same scheduling information to the terminal in a manner of time synchronization, frequency synchronization, and symbol synchronization with the first wireless access point; the scheduling information is used in the first wireless access point and the Assigning, to the terminal, a time-frequency resource location of an uplink or downlink traffic channel on at least one of time-frequency resources used by the second wireless access point; a time-frequency peer-to-peer replacement transmitting module between the wireless access points, configured to be in a time interval sequence configured for the scheduling information transmission channel of the first wireless access point to the terminal, in at least one time interval, Disclosing, by the first wireless access point, sending scheduling information to the terminal, where the second wireless access point uses the first wireless access point in the office in at least one time interval in the time interval sequence The frequency used before the at least one time interval is used to send scheduling information to the terminal. The apparatus according to claim 8, wherein the inter-radio access point macrodiversity transmitting module or the inter-radio-frequency peer-to-peer replacement transmitting module is configured to: And transmitting, by the second wireless access point, a signal carrying the scheduling information to the terminal by using a same channel code or a pseudo random sequence as the first wireless access point. The apparatus according to claim 8 or 9, wherein the inter-radio access point macrodiversity transmitting module or the inter-radio-frequency peer-to-peer replacement transmitting module is configured to: Sending respective cell or access point identifications using the same frequency on the second wireless access point and the first wireless access point in the same predetermined cell or access point identification information transmission time window Information; wherein the cell or access point identification information transmission time window occupies the time resource in the time interval sequence configured by the first wireless access point to the scheduling information transmission channel of the terminal, or occupies the A time resource other than a time interval sequence configured by the first wireless access point to the scheduling information transmission channel of the terminal. The apparatus according to claim 10, wherein the inter-radio access point macrodiversity transmitting module or the inter-radio access point replacement transmitting module between the wireless access points is configured to: And transmitting, by the second wireless access point and the first wireless access point, respective cell or access point identification information using frequencies within a Long Term Evolution LTE channel bandwidth. The apparatus according to claim 8 or 9, wherein the inter-radio access point macrodiversity transmitting module or the inter-radio-frequency peer-to-peer replacement transmitting module is configured to: When at least one of the first wireless access point and the second wireless access point is a macro cell access point, the first frequency band used by the downlink channel of the macro cell access point is opened up a time-frequency window used by the first wireless access point and the second wireless access point downlink control channel; the first wireless access point and the second wireless access point are sent in the time-frequency window Scheduling information; the scheduling information is used to allocate a time-frequency resource location of the traffic channel to the terminal in a frequency band used by the second wireless access point; or Generating, for the second frequency band used by the single frequency network composed of the first wireless access point and the second wireless access point, for the first wireless access point and the second wireless connection a time-frequency window used by the in-point downlink control channel; the first wireless access point and the second wireless access point transmitting scheduling information in the time-frequency window. The device according to claim 8, further comprising: a potential cooperative control state judging module between the wireless access points, configured to: And acquiring, by the terminal, the measurement information of the identification information bearer signal of the at least two wireless access points in the cell or access point identification information sending time window, where the at least two wireless access points include at least the first a wireless access point and the second wireless access point; Determining whether the amplitude or power of the identification information carrying signal of the second wireless access point is greater than the amplitude or power of the identification information carrying signal of the first wireless access point; determining the identification of the second wireless access point When the amplitude or power of the information carrying signal is greater than the amplitude or power of the identification information carrying signal of the first wireless access point, determining the second wireless access point as the first wireless access point at the current location of the terminal a potential cooperative control node, and sending the scheduling information to the terminal by using the second wireless access point; or Determining whether the amplitude or power of the identification information carrying signal of the second wireless access point is greater than a first threshold; when determining that the amplitude or power of the identification information carrying signal of the second wireless access point is greater than the first threshold, The second wireless access point determines that the first wireless access point is a potential coordinated control node in the current location of the terminal, and sends the scheduling information to the terminal by using the second wireless access point. The device according to claim 8, further comprising: a wireless access point synchronization control module, configured to: Obtaining, respectively, an arrival phase of the first narrowband synchronization measurement signal sent by the first wireless access point, and an arrival phase of the second narrowband synchronization measurement signal sent by the second wireless access point, where the first narrowband The bandwidth of the synchronous measurement signal and the second narrowband synchronous measurement signal is less than 1 MHz; Determining, according to an arrival phase of the first narrowband synchronization measurement signal and an arrival phase of the second narrowband synchronization measurement signal, a phase when the first narrowband synchronization measurement signal leaves the transmission plane surface of the first wireless access point a phase difference between a phase when the second narrowband synchronization measurement signal leaves the second wireless access point transmitting antenna port face; And adjusting a start time of a radio frame sent by the first wireless access point or the second wireless access point when the phase difference is greater than a predetermined phase error threshold. A computer readable medium storing computer executable instructions that, when executed by a processor, implement the steps of the method of cooperative control between wireless access points according to any one of claims 1 to 7.

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