WO2018082049A1 - Low frequency network-assisted synchronisation and access method, apparatus, and system - Google Patents

Abstract

A low frequency network-assisted synchronisation and access method, apparatus, and system. The synchronisation access method comprises: after fulfilling trigger conditions, a user device sends to a low frequency transmission point a preamble sequence selected on the basis of a preamble resource configured by the frequency transmission point and/or a time frequency resource for sending the preamble sequence; by means of the preamble sequence, implicitly indicating the link quality between the user device and a high frequency transmission point or the intention of the user device to establish a connection with the high frequency transmission point. Thus, the low frequency transmission point can send assistance information to the high frequency transmission point, in order to help the high frequency transmission point send a synchronisation signal in a targeted manner, thus speeding up the synchronisation and initial access process of the terminal (user device) and the high frequency transmission point.

Description

Synchronization and access method, apparatus and system assisted by a low frequency network Technical field

The present invention relates to the field of communications, and in particular, to a synchronization and access method, apparatus and system assisted by a low frequency network.

Background technique

Research in Third Generation Partnership Project ^{(3GPP, 3 rd Generation Partnership Project} ) new wireless (NR, new radio) access technology, the new frame structure, new wave, new multiple access technology, high frequency Access transmission technology is the focus of research.

In the high frequency band (for example, greater than 6 GHz), since the path loss is large and the signal transmission relies on the directional link, the beamforming technology needs to be widely applied to the physical channel and the physical signal, including the control channel, the broadcast channel, and the data. Channel, synchronization signal, reference signal, etc. However, in the low frequency band, beamforming techniques are mostly used for data channels, and other physical channels or physical signals are mostly transmitted in an omnidirectional manner to obtain greater coverage. Therefore, in the high frequency band, the influence of the beamforming technology of physical channels and physical signals on the transmission method and flow of the current system is a research hotspot.

It should be noted that the above description of the technical background is only for the purpose of facilitating a clear and complete description of the technical solutions of the present invention, and is convenient for understanding by those skilled in the art. The above technical solutions are not considered to be well known to those skilled in the art simply because these aspects are set forth in the background section of the present invention.

Summary of the invention

The inventors have found that in the discussion of 3GPP's radio access network working group 1 (RAN1), the high frequency band works in two ways, namely standalone operation mode and non-independent operation. (non-standalone operation) mode. In the non-independent operation mode, other networks (such as low-frequency networks, etc.) can assist the high-band network to complete the communication process, that is, the terminal can receive auxiliary information of other networks to implement access communication of the high-frequency network.

Taking the initial access process as an example, in the independent operation mode, in order to achieve coverage over a long distance, the high frequency network can use the beamforming technology to transmit the synchronization signal and serve it by beam sweeping. Coverage. In this case, if long-term evolution (LTE) is used The synchronization signal transmission period of the system to transmit the beamformed synchronization signal greatly increases the synchronization time between the terminal and the high frequency network.

In order to solve the above problem, an embodiment of the present invention provides a synchronization and access method, apparatus, and system assisted by a low frequency network. In a non-independent operation mode, a terminal first interacts with a low frequency network and transmits the same through a low frequency network. The auxiliary information of the frequency network is used to quickly synchronize the high frequency network and the initial access process.

According to a first aspect of the embodiments of the present invention, there is provided a synchronization and access method assisted by a low frequency network, the method being applied to a low frequency transmission point, wherein the method comprises:

The low frequency transmission point configures the preamble resource for the user equipment, so that the user equipment transmits the preamble sequence and/or the preamble sequence selected based on the preamble resource to the low frequency transmission point after satisfying the trigger condition The frequency resource implicitly indicates the link quality between the user equipment and the high frequency transmission point or the user equipment wants to establish a connection with the high frequency transmission point.

According to a second aspect of the present invention, there is provided a synchronization and access method assisted by a low frequency network, the method being applied to a user equipment, the user equipment having implemented downlink synchronization with a low frequency transmission point, wherein The method includes:

After the triggering condition is met, the user equipment sends a preamble sequence and/or a time-frequency resource of the preamble sequence selected based on the preamble resource configured by the low-frequency transmission point to the low-frequency transmission point, by using the preamble sequence And/or the time-frequency resource implicitly indicates a link quality between the user equipment and a high frequency transmission point or a desire of the user equipment to establish a connection with a high frequency transmission point.

According to a third aspect of the embodiments of the present invention, there is provided a synchronization and access method assisted by a low frequency network, the method being applied to a high frequency transmission point, wherein the method comprises:

The high frequency transmission point receives auxiliary information transmitted by the low frequency transmission point, and the auxiliary information includes a beamforming vector of the high frequency transmission point relative to the user equipment;

The high frequency transmission point transmits the synchronization signal to the user equipment using the beamforming vector.

According to a fourth aspect of the present invention, there is provided a synchronization and access device assisted by a low frequency network, the device being configured at a low frequency transmission point, wherein the device comprises:

a configuration unit, configured to configure a preamble resource for the user equipment, so that the user equipment sends a preamble sequence and/or a preamble sequence selected based on the preamble resource to the low frequency transmission point after the trigger condition is met The time-frequency resource implicitly indicates the link quality between the user equipment and the high-frequency transmission point or the user's willingness to establish a connection with the high-frequency transmission point.

According to a fifth aspect of the present invention, there is provided a synchronization and access device assisted by a low frequency network, the device being configured on a user equipment, the user equipment having implemented downlink synchronization with a low frequency transmission point, wherein The device includes:

a sending unit, after the user equipment meets the trigger condition, sending a preamble sequence and/or a time-frequency resource of the preamble sequence selected according to the preamble resource configured by the low-frequency transmission point to the low-frequency transmission point, The link quality between the user equipment and the high frequency transmission point or the willingness of the user equipment to establish a connection with the high frequency transmission point is implicitly indicated by the preamble sequence and/or the time-frequency resource.

According to a sixth aspect of the present invention, there is provided a synchronization and access device assisted by a low frequency network, the device being configured at a high frequency transmission point, wherein the device comprises:

a receiving unit, which receives auxiliary information sent by a low frequency transmission point, where the auxiliary information includes a beamforming vector of the high frequency transmission point relative to the user equipment;

a first transmitting unit that transmits a synchronization signal to the user equipment using the beamforming vector.

According to a seventh aspect of the present invention, there is provided a base station, wherein the base station is configured with the apparatus of the foregoing fourth aspect or the apparatus of the foregoing sixth aspect.

According to an eighth aspect of the embodiments of the present invention, there is provided a user equipment, the user equipment being configured with the apparatus of the foregoing fifth aspect.

According to a ninth aspect of the embodiments of the present invention, there is provided a communication system, comprising: a base station and a user equipment, wherein the base station is configured with the apparatus of the foregoing fourth aspect or the apparatus of the foregoing sixth aspect, The user equipment is configured with the apparatus described in the foregoing fifth aspect.

The beneficial effects of the embodiments of the present invention are as follows: In the high frequency band non-independent operation mode, the low frequency network can trigger the high frequency network to send the synchronization signal, and accelerate the synchronization of the terminal and the high frequency network and the initial access process.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the drawings, in which <RTIgt; It should be understood that the embodiments of the invention are not limited in scope. The embodiments of the present invention include many variations, modifications, and equivalents within the scope of the appended claims.

Features described and/or illustrated with respect to one embodiment may be used in one or more other embodiments in the same or similar manner, in combination with, or in place of, features in other embodiments. .

It should be emphasized that the term "include/comprise" as used herein refers to the presence of features, components, steps or components, The existence or addition of one or more other features, components, steps or components are not excluded.

DRAWINGS

The accompanying drawings are included to provide a further understanding of the embodiments of the invention Obviously, the drawings in the following description are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings according to the drawings without any inventive labor. In the drawing:

1 is a schematic diagram of a synchronization and access method of Embodiment 1;

2 is a schematic diagram of a synchronization and access method of Embodiment 2;

3 is a schematic diagram of a synchronization and access method of Embodiment 3;

4 is an information interaction process of an embodiment of a synchronization and access method according to Embodiment 1-3;

5 is a flow of information interaction of another embodiment of a synchronization and access method according to Embodiment 1-3;

Figure 6 is a schematic diagram of a synchronization and access device of Embodiment 4;

Figure 7 is a schematic diagram of a base station of Embodiment 4;

Figure 8 is a schematic diagram of a synchronization and access device of Embodiment 5;

9 is a schematic diagram of a user equipment of Embodiment 5;

Figure 10 is a schematic diagram of a synchronization and access device of Embodiment 6;

Figure 11 is a schematic diagram of a base station of Embodiment 6;

Figure 12 is a schematic diagram of a communication system of Embodiment 7.

detailed description

The foregoing and other features of the present invention will be apparent from the The specific embodiments of the present invention are disclosed in the specification and the drawings, which are illustrated in the embodiment of the invention The invention includes all modifications, variations and equivalents falling within the scope of the appended claims.

Various embodiments of the present invention will be described below with reference to the accompanying drawings. These embodiments are merely exemplary and are not limiting of the invention.

In this application, a base station may be referred to as a Transmission Point (TRP), an access point, a broadcast transmitter, a Node B, an evolved Node B (eNB), etc., and may include some or all of their functions. In The term "transmission point" will be used in this paper, and the transmission point in the high frequency network is called high frequency transmission point (HF-TRP, High Frequency-TRP), and the transmission point in the low frequency network is called low frequency transmission point (LF- TRP, Low Frequency-TRP). Each transmission point provides communication coverage for a particular geographic area. The low frequency transmission point and the high frequency transmission point may be co-located or non-co-located. The term "cell" can refer to a transmission point and/or its coverage area, depending on the context in which the term is used.

In the present application, a terminal may be referred to as a "user equipment" (UE, User Equipment). A UE may be fixed or mobile and may also be referred to as a mobile station, device, user, access point, subscriber unit, station, and the like. The UE may be a cellular telephone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless telephone, and the like.

Example 1

The embodiment of the present invention provides a synchronization and access method assisted by a low frequency network, and the method is applied to a low frequency transmission point of the low frequency network, and in this embodiment, the low frequency transmission of the user equipment and the low frequency network is assumed. The point has reached a downlink synchronization. 1 is a flow chart of the method. Referring to FIG. 1, the method includes:

Step 101: The low frequency transmission point configures a preamble resource for the user equipment, so that the user equipment sends a preamble sequence and/or a transmission preamble sequence selected based on the preamble resource to the low frequency transmission point after the trigger condition is met. The time-frequency resource implicitly indicates the link quality between the user equipment and the high-frequency transmission point or the user's willingness to access the high-frequency transmission point.

In this embodiment, the configuration manner and the configuration timing of the preamble resource are not limited, and the low-frequency transmission point may be implemented at a suitable timing, such as when the traffic is too large, and the accessed user equipment is excessive. The foregoing preamble resources are configured in a manner such as static, semi-static, or dynamic.

In this embodiment, the preamble resource may be cell-specific, that is, the low-frequency transmission point configures a preamble resource set for the user equipment in the cell, and the user equipment in the cell may use the preamble resource set. The preamble sequence and/or the time-frequency resource of the preamble sequence; the preamble resource may also be dedicated to the user equipment, that is, the low-frequency transmission point configures different preamble resource sets for different user equipments, and different users The device uses a preamble sequence in a different preamble resource set and/or a time-frequency resource in which the preamble sequence is transmitted; the preamble resource may also be packet-based, that is, the low-frequency transmission point is grouped for user equipment in the cell. Configuring different preamble resource sets for user equipments of different groups, such that user equipments of the same group use the same preamble sequence in the preamble resource set and/or the time-frequency resource of the preamble sequence. The user equipment of the group uses a preamble sequence of different preamble resource sets and/or a time-frequency resource of the preamble sequence.

In this embodiment, the preamble resource may be a preamble sequence group that includes multiple preamble sequences. By configuring such a preamble resource, the user equipment may obtain a certain trigger condition from the preamble sequence group. Selecting a preamble sequence for transmitting, after receiving the preamble sequence, the low-frequency transmission point can determine that the preamble sequence is selected and sent by the user equipment based on the configured preamble resource after satisfying the trigger condition. Therefore, the link quality between the user equipment and the high-frequency transmission point or the user equipment wants to access the high-frequency transmission point, for example, the link quality can support communication, but the user equipment does not timely The synchronization signal sent by the high frequency transmission point is received.

In this embodiment, the preamble resource may be a preamble sequence or a time-frequency resource that transmits a preamble sequence. In this embodiment, the format and content of the preamble resource are not limited, as long as the preamble resource is used. The user equipment can be made to implicitly indicate the quality of the link between it and the high frequency transmission point or the willingness of the user equipment to access the high frequency transmission point.

In this embodiment, the low-frequency transmission point is configured to configure the preamble resource for the user equipment, so that the user equipment sends the preamble sequence to the low-frequency transmission point based on the preamble resource after the certain trigger condition is met. Expressing the link quality between the low-frequency transmission point and the high-frequency transmission point or the user equipment's willingness to access the high-frequency transmission point, thereby accelerating the synchronization and initial access of the user equipment with the high-frequency transmission point process. The processing of the user equipment will be described in Embodiment 2.

In an embodiment of the present embodiment, as shown in FIG. 1 , optionally, the method may further include:

Step 102: After receiving the preamble sequence and/or the time-frequency resource sent by the user equipment, the low-frequency transmission point sends auxiliary information to the high-frequency transmission point to trigger the high-frequency transmission point to send to the user equipment. SS burst (called a sync signal).

In this embodiment, after receiving the preamble sequence and/or the time-frequency resource, the low-frequency transmission point may determine that the link quality between the user equipment and the high-frequency transmission point can support communication, but The user equipment does not receive the synchronization signal sent by the high frequency transmission point, or can determine that the user equipment wants to establish a connection with the high frequency transmission point, whereby the low frequency transmission point can be based on the received preamble sequence and/or Or the time-frequency resource sends the auxiliary information to the high-frequency transmission point to assist the high-frequency transmission point to transmit the synchronization signal in a targeted manner, thereby accelerating the synchronization and initial access process between the user equipment and the high-frequency transmission point. The processing of the high frequency transmission point will be described in the third embodiment.

In this embodiment, the auxiliary information is, for example, a beamforming vector of the high frequency transmission point with respect to the user equipment, which can be obtained by calculation or derivation from the low frequency transmission point.

For example, after receiving the preamble sequence sent by the user equipment and/or transmitting the time-frequency resource of the preamble sequence, the low-frequency transmission point may detect the preamble sequence and/or the time-frequency resource to determine whether it is The preamble sequence and/or the time-frequency resource selected by the user equipment based on the new preamble resource configured by the user equipment, after determining to be YES, the low-frequency transmission point may be according to the preamble sequence and/or the time sequence sent by the user equipment. The beam information implicitly carried by the frequency resource (for example, beam direction information) derives a beamforming vector of the high frequency transmission point relative to the user equipment. For example, the beam direction information implicitly carried is a low frequency transmission point relative to the user equipment. Beam information, the low frequency transmission point can be derived from the coarse position of the low frequency transmission point relative to the user equipment, and then the low frequency transmission point can be combined with the low frequency transmission according to the known network topology information, that is, the position of the high frequency transmission point. The point is relative to the coarse position of the user equipment, and the beamforming vector of the high frequency transmission point relative to the user equipment is derived. In addition, the user equipment can also obtain the beam information of the high frequency transmission point relative to the user equipment and the identifier of the high frequency transmission point, and derive the beamforming of the high frequency transmission point relative to the user equipment according to the user equipment. vector.

In this embodiment, the beam information of the high-frequency transmission point relative to the user equipment and/or the identifier of the high-frequency transmission point may be carried by the user equipment through the message 3 (Message 3), but this embodiment does not use this. As a limitation.

In the present embodiment, the method for calculating or deriving the beamforming vector of the high-frequency transmission point with respect to the user equipment is not limited to the low-frequency transmission point, and may be a conventional method or an arbitrary implementable method.

In the present embodiment, it is not limited to notify the low frequency transmission point how many high frequency transmission points and which high frequency transmission points to transmit the synchronization signal, depending on the implementation.

In the present embodiment, the synchronization signal transmitted by the high-frequency transmission point to the user equipment according to the auxiliary information is an aperiodic synchronization signal, and the aperiodic synchronization signal is transmitted by the high-frequency transmission point based on the auxiliary information. The periodic synchronization signal transmitted by the high-frequency transmission point does not conflict, that is, the high-frequency transmission point can transmit the periodic synchronization signal in a conventional manner, and receives the auxiliary information according to the manner of this embodiment. The above non-periodic synchronization signal is then transmitted.

In another embodiment of the embodiment, as shown in FIG. 1 , optionally, the method may further include:

Step 103: The low frequency transmission point sends the indication information to the user equipment to indicate whether the user equipment further searches for the synchronization signal.

In this implementation manner, the low frequency transmission point may further determine, according to its own policy, whether the user equipment needs The search for the synchronization signal continues, and is indicated to the user equipment by the above indication information. For example, if the low frequency network is idle, the low frequency transmission point may indicate that the low frequency network of the user equipment can be accessed by using the foregoing indication information, and the user equipment does not need to search for other synchronization signals. For another example, if the low frequency network is busy, the low frequency transmission point may indicate that the low frequency network cannot be accessed by the user equipment by using the foregoing indication information, and the user equipment needs to continue to search for other synchronization signals, such as a synchronization signal of the high frequency network.

In this embodiment, the indication information may be carried by a random access response. For example, the low frequency transmission point may indicate whether the user equipment needs to continue to search for the synchronization signal by adding 1 bit in the random access response. For example, the bit "1" is used to indicate that the user equipment continues to search for other synchronization signals (such as the synchronization signal transmitted by the high-frequency transmission point), and the access procedure between the user equipment and the low-frequency transmission point ends, ignoring the bit "1". "After the information; bit "0" is used to indicate that the user equipment does not need to further search for the synchronization signal, and continues to parse the information following the indication bit to complete the access procedure with the low frequency transmission point.

In this embodiment, the user equipment may obtain the rough beam information of the low frequency transmission point and the high frequency transmission point relative to the user equipment through the synchronization channel and the broadcast channel, and may The low frequency transmission point is sent to the low frequency transmission point with respect to the beam information of the user equipment and/or the beam information of the high frequency transmission point relative to the user equipment and the identifier of the high frequency transmission point, thereby, the low frequency transmission point can Selecting an appropriate beam according to the beam information of the user equipment to transmit the indication information, or deriving a beamforming vector of the high frequency transmission point relative to the user equipment according to the beam information of the low frequency transmission point relative to the user equipment. And sent to the high frequency transmission point as auxiliary information to trigger the high frequency transmission point to send the synchronization signal. And the low frequency transmission point may calculate a beamforming vector of the high frequency transmission point relative to the user equipment according to the beam information of the high frequency transmission point, and send the auxiliary information to the high frequency transmission point to trigger the The high frequency transmission point transmits the above synchronization signal.

The coarse beam information of the low frequency transmission point relative to the user equipment may be implicitly carried by the foregoing preamble sequence and/or the time frequency resource sent by the UE, and the beam information of the high frequency transmission point relative to the user equipment and the high frequency The identity of the transmission point can be carried by message 3 sent by the user equipment.

With the method of the embodiment, the low-frequency transmission point configures a new preamble resource for the user equipment, so that the user equipment implicitly indicates the high-precision code sequence and/or the time-frequency resource selected based on the preamble resource. The link quality of the frequency transmission point or the willingness of the user equipment to establish a connection with the high frequency transmission point, thereby accelerating the synchronization and initial access process of the user equipment with the high frequency transmission point.

Example 2

The embodiment of the present invention provides a synchronization and access method assisted by a low frequency network, and the method is applied to a user equipment, which is a user equipment side processing corresponding to the method of Embodiment 1, wherein the same content as Embodiment 1 is no longer Repeat the instructions. Similarly, in this embodiment, it is assumed that the user equipment has achieved downlink synchronization with the low frequency transmission point of the low frequency network. 2 is a flow chart of the method. Referring to FIG. 2, the method includes:

Step 201: After the triggering condition is met, the user equipment sends a preamble sequence selected according to the preamble resource configured by the low frequency transmission point to the low frequency transmission point, and/or a time-frequency resource of the preamble sequence. The preamble sequence and/or the time-frequency resource implicitly indicating a link quality between the user equipment and the high-frequency transmission point or a willingness of the user equipment to establish a connection with a high-frequency transmission point .

In this embodiment, the preamble resource has been described in detail in Embodiment 1, and the content thereof is incorporated herein, and details are not described herein again.

In this embodiment, the trigger condition may be that the reference signal received power of the at least one high-frequency transmission point is better than the reference signal received power of the low-frequency transmission point, or may be the reference signal received power and the low-frequency transmission of the at least one high-frequency transmission point. The reference signal received power of the point is equivalent, and the reference signal received power of the at least one high-frequency transmission point is greater than a predetermined threshold, or the user equipment wants to establish a connection with the high-frequency transmission point, and the trigger condition is satisfied. The user equipment may send the preamble sequence and/or the time-frequency resource to the low-frequency transmission point to implicitly indicate that the link quality between the low-frequency transmission point and the high-frequency transmission point can support communication, but Receiving the synchronization signal sent by the high frequency transmission point or the user equipment wants to establish a connection with the high frequency transmission point, whereby the low frequency transmission point can assist the high frequency by transmitting auxiliary information to the high frequency transmission point The frequency transmission point transmits a synchronization signal, thereby accelerating the synchronization and access process of the user equipment and the high frequency transmission point. The auxiliary information has been described in Embodiment 1, and will not be described herein.

In this embodiment, the user equipment can obtain the identifiers of the low-frequency transmission point and the high-frequency transmission point (for example, the cell ID) and the reference signal received power (RSRP, Reference Signal Receiving Power) by cell search and measurement. It can be judged whether the above trigger condition is satisfied.

In this embodiment, corresponding to the processing of the low-frequency transmission point, the user equipment may further receive the indication information sent by the low-frequency transmission point, and determine whether to continue searching for the synchronization signal according to the indication information. The indication information is carried by the random access response, for example. If the indication bit (the bit of the indication information) in the random access response is “1”, the user equipment continues to search for other synchronization signals. And the access process between the user equipment and the low frequency transmission point ends, and the user equipment can ignore the letter after the bit "1" If the indication bit in the random access response is “0”, the user equipment does not further search for other synchronization signals, which can parse the information behind the bit to complete the connection with the low frequency transmission point. Into the process.

In this embodiment, as described above, the user equipment may obtain coarse beam information of the low frequency transmission point and the high frequency transmission point with respect to the user equipment through the synchronization channel and the broadcast channel in the cell search and measurement phase. The user equipment may also send the low frequency transmission point to the low frequency transmission with respect to the beam information of the user equipment and/or the beam information of the high frequency transmission point relative to the user equipment and the identifier of the high frequency transmission point. Point, the beam information of the low frequency transmission point relative to the user equipment may be implicitly carried by the foregoing preamble sequence and/or the time frequency resource, and the beam information of the high frequency transmission point relative to the user equipment and the high frequency transmission point The identity can be carried via message 3. Therefore, the low frequency transmission point may send the indication information to the user equipment according to the beam information of the low frequency transmission point with respect to the beam information of the user equipment, and/or according to the beam information of the low frequency transmission point relative to the user equipment. Deriving a beamforming vector of the high-frequency transmission point relative to the user equipment, and transmitting the same as the auxiliary information to the high-frequency transmission point, so that the high-frequency transmission point sends a synchronization signal to the user equipment, thereby accelerating the user equipment and Synchronization and initial access of high frequency transmission points. Alternatively, the low frequency transmission point may further derive a beamforming vector of the high frequency transmission point relative to the user equipment according to the beam information of the high frequency transmission point with respect to the user equipment, and send the beam shaping vector as the auxiliary information. The high frequency transmission point is such that the high frequency transmission point sends a synchronization signal to the user equipment accordingly, which accelerates the synchronization and initial access process of the user equipment with the high frequency transmission point.

In this embodiment, if the indication sent by the low frequency transmission network is not received, the user equipment may continue to search for the synchronization signal and transmit the synchronization signal (for example, the high frequency transmission point) without further searching for the indication information of the synchronization signal. ) Synchronization, the specific synchronization process can refer to the conventional process, and will not be described here.

In this embodiment, if the user equipment cannot receive the synchronization signal sent by any high-frequency transmission point within a response time window, the user equipment may again send the low-frequency transmission point based on the low-frequency transmission point to which the downlink synchronization is reached. The preamble sequence selected by the configured preamble resource and/or the time-frequency resource of the transmitted preamble sequence. In this embodiment, the user equipment may select a preamble sequence and/or a time-frequency resource of the preamble sequence based on the configured preamble resource, repeat the previous procedure, or may be based on a preamble other than the configured preamble resource. The code resource selects a preamble sequence and/or a time-frequency resource that transmits the preamble sequence to access the low frequency transmission point.

With the method of this embodiment, the user equipment sends the preamble sequence selected based on the preamble resource configured by the low frequency transmission point and/or the time-frequency resource of the preamble sequence to implicitly indicate the user equipment and the high frequency transmission point. The link quality or the willingness of the user equipment to establish a connection with the high frequency transmission point, thereby accelerating the synchronization and initial access process of the user equipment with the high frequency transmission point.

Example 3

The embodiment of the present invention provides a synchronization and access method assisted by a low frequency network, which is applied to a high frequency transmission point in a high frequency network, which is corresponding to the low frequency transmission point of Embodiment 1 and the user equipment of Embodiment 2. Processing on the high frequency transmission point side. Similarly, in this embodiment, it is assumed that the user equipment has achieved downlink synchronization with the low frequency transmission point. 3 is a flow chart of the method. Referring to FIG. 3, the method includes:

Step 301: The high frequency transmission point receives auxiliary information sent by the low frequency transmission point, where the auxiliary information includes a beamforming vector of the high frequency transmission point relative to the user equipment;

Step 302: The high frequency transmission point uses the beamforming vector to send an SS burst (referred to as a synchronization signal) to the user equipment.

In the present embodiment, the auxiliary information has been described in detail in Embodiment 1 and Embodiment 2, and the contents thereof are incorporated herein, and details are not described herein again.

In this embodiment, the low frequency transmission point transmits the foregoing auxiliary information to the high frequency transmission point, and can indicate that the high frequency transmission point uses the beamforming vector to send a synchronization signal to the user equipment, thereby accelerating the user equipment and the high frequency transmission point. Synchronization and initial access procedures.

In this embodiment, the synchronization signal sent by the high frequency transmission point according to the auxiliary information is a non-periodic synchronization signal. As described above, this does not affect the transmission of the periodic synchronization signal by the high frequency transmission point. That is to say, the high-frequency transmission point can not only transmit the above-mentioned aperiodic synchronization signal according to the above-mentioned auxiliary information, but also can transmit a periodic synchronization signal according to its own measurement. For the transmission of its periodic synchronization signal, reference may be made to the prior art, and details are not described herein again.

In this embodiment, since the high frequency transmission point calculated by the low frequency transmission point may not be accurate with respect to the beamforming vector of the user equipment, the high frequency transmission point may use the beam shaping vector and its corresponding The shaping vector of the beam around the beam transmits the synchronization signal, thereby increasing the probability that the user equipment detects the synchronization signal.

Through the method of the embodiment, the high-frequency transmission point can select the beam transmission synchronization signal according to the auxiliary information sent by the low-frequency transmission point, and accelerate the synchronization and initial access process between the user equipment and the high-frequency transmission point.

The synchronization and access methods assisted by the low frequency network are performed by the low frequency transmission point (LF-TRP), the user equipment (UE) and the high frequency transmission point (HF-TRP) from Embodiment 1 to Embodiment 3, respectively. Note that the method is described below through an information exchange process of a low frequency transmission point (LF-TRP), a user equipment (UE), and a high frequency transmission point (HF-TRP), wherein the same content as the embodiment 1-3 is no longer Repeat the instructions.

FIG. 4 is a schematic diagram of a synchronization process according to an embodiment of the present embodiment. In this embodiment, a preamble sequence based on the configured preamble resource selection is sent by the UE to the LF-TRP, as shown in FIG. The process includes:

Step 401: After reaching downlink synchronization with the LF-TRP, the UE sends a preamble sequence to the LF-TRP, where the preamble sequence is selected based on the preamble resource configured by the LF-TRP.

Step 402: The LF-TRP detects a preamble sequence sent by the UE, and obtains beam information of the LF-TRP relative to the UE.

Step 403: The LF-TRP sends the modified random access response to the UE.

In the modified random access response, an additional 1 bit of indication information is included to indicate whether the UE continues to search for the synchronization signal; and the LF-TRP may select an appropriate LF-TRP according to the beam information of the UE. The beam transmits the modified random access response;

Step 404: The LF-TRP derives a beamforming weighting factor (beamforming vector) of the HF-TRP relative to the UE;

Step 405: The LF-TRP sends auxiliary information to the HF-TRP, instructing the HF-TRP to use the derived HF-TRP to transmit a synchronization signal with respect to the beamforming weighting factor of the UE;

Step 406: The HF-TRP sends a synchronization signal.

The HF-TRP uses the LF-TRP derived HF-TRP to transmit a synchronization signal with respect to the beamforming weighting factor of the UE; optionally, the HF-TRP can use the beamforming weighting factor and its corresponding beam around the beam. Forming a weighting factor to transmit the above synchronization signal;

Step 407: The UE detects the synchronization signal and other access required information.

Step 408: The UE sends a preamble sequence to the HF-TRP.

Step 409: HF-TRP updates the beamforming factor;

The HF-TRP updates the beamforming factor according to the foregoing preamble sequence sent by the UE;

Step 410: The HF-TRP sends a random access response using the updated beamforming factor.

After that, other steps of the initial access can be continued.

FIG. 5 is a schematic diagram of a synchronization process according to another embodiment of the present embodiment. In this embodiment, the preamble sequence based on the configured preamble resource selection is still sent by the UE to the LF-TRP, as shown in FIG. , the process includes:

Step 501: After reaching downlink synchronization with the LF-TRP, the UE sends a preamble sequence to the LF-TRP, where the preamble sequence is selected based on the preamble resource configured by the LF-TRP.

Step 502: The LF-TRP sends the modified random access response to the UE.

In the modified random access response, an additional 1-bit indication information is included to indicate whether the UE continues to search for the synchronization signal;

Step 503: The UE sends a message 3 (Message 3) to the LF-TRP, where the message 3 includes the beam information of the HF-TRP relative to the UE and the identifier of the HF-TRP (for example, Cell ID);

Regarding message 3, reference may be made to the prior art; and, in the cell search and measurement phase, the UE may obtain rough beam information of the HF-TRP with respect to the UE and an identifier of the HF-TRP;

Step 504: The LF-TRP sends a message 4 (Message 4) to the UE;

Regarding message 4, reference can be made to the prior art;

Step 505: The LF-TRP derives a beamforming weighting factor (beamforming vector) of the HF-TRP relative to the UE;

The LF-TRP may derive the beamforming weighting factor of the HF-TRP relative to the UE according to the rough beam information of the HF-TRP obtained by the foregoing and/or the relative position of the high-frequency transmission point and the user equipment, this embodiment There are no restrictions on specific derivation methods;

Step 506: The LF-TRP sends auxiliary information to the HF-TRP, instructing the HF-TRP to use the derived HF-TRP to transmit a synchronization signal with respect to the beamforming weighting factor of the UE.

Step 507: The LF-TRP instructs the UE to receive the synchronization signal sent by the HF-TRP.

Step 508: The HF-TRP sends a synchronization signal.

The HF-TRP uses the LF-TRP derived HF-TRP to transmit a synchronization signal with respect to the beamforming weighting factor of the UE; optionally, the HF-TRP can use the beamforming weighting factor and its corresponding beam around the beam. Forming a weighting factor to transmit the above synchronization signal;

Step 509: The UE detects the synchronization signal and other access required information.

Step 510: The UE sends a preamble sequence to the HF-TRP.

Step 511: HF-TRP updates the beamforming factor;

The HF-TRP updates the beamforming factor according to the foregoing preamble sequence sent by the UE;

Step 512: The HF-TRP sends a random access response using the updated beamforming factor.

After that, other steps of the initial access can be continued.

Example 4

The embodiment of the present invention provides a synchronization and access device assisted by a low frequency network. The device is configured at a low frequency transmission point. The principle of solving the problem is similar to the method of the first embodiment. Therefore, the specific implementation may refer to the implementation. The implementation of the method of Example 1 is not repeated here.

Figure 6 is a schematic diagram of the composition of the device. As shown in Figure 6, the device 600 includes:

The configuration unit 601 is configured to configure a preamble resource for the user equipment, so that the user equipment sends the preamble sequence and/or the time frequency of the preamble sequence selected based on the preamble resource to the low frequency transmission point after the trigger condition is met. The resource implicitly indicates the quality of the link between the user equipment and the high frequency transmission point or the user's willingness to establish a connection with the high frequency transmission point.

In this embodiment, the preamble resource may be a preamble sequence group that includes multiple preamble sequences, or may be a preamble sequence, or may be a time-frequency resource that transmits a preamble sequence, or the foregoing three types. Any combination is specifically as described in Embodiment 1, and details are not described herein again.

In this embodiment, as shown in FIG. 6, the apparatus 600 may further include:

a first sending unit 602, after receiving the preamble sequence and/or the time-frequency resource of the preamble sequence sent by the user equipment, after the low-frequency transmission point, sending the auxiliary information to the high-frequency transmission point to trigger the high The frequency transmission point sends a synchronization signal to the user equipment.

In this embodiment, the auxiliary information is, for example, a beamforming vector of the high frequency transmission point with respect to the user equipment.

In an embodiment of the present embodiment, as shown in FIG. 6, the apparatus 600 may further include: a first receiving unit 603, a first detecting unit 604, a first obtaining unit 605, and a first calculating unit 606.

The first receiving unit 603 receives the preamble sequence and/or the time-frequency resource of the preamble sequence sent by the user equipment; the first detecting unit 604 detects the preamble sequence and/or the time-frequency resource to determine Whether the preamble sequence and/or the time-frequency resource is selected and sent by the user equipment based on the preamble resource after satisfying a trigger condition; the first acquiring unit 605 is in the preamble sequence and/or the time-frequency resource. When the user equipment selects and transmits based on the preamble resource after satisfying the trigger condition, the former And obtaining, by the pilot sequence and/or the time-frequency resource, beam information of the low-frequency transmission point relative to the user equipment; the first calculating unit 606 deriving the high-frequency transmission point relative to the user according to the beam information of the low-frequency transmission point relative to the user equipment. The beamforming vector of the device.

In another embodiment of the present embodiment, as shown in FIG. 6, the apparatus 600 may further include: a second receiving unit 603', a second detecting unit 604', a second obtaining unit 605', and a second calculating unit 606. '.

The second receiving unit 603' receives the preamble sequence and/or the time-frequency resource of the preamble sequence sent by the user equipment, and the second detecting unit 604' detects the preamble sequence and/or the time-frequency resource. Determining whether the preamble sequence and/or the time-frequency resource is selected and sent by the user equipment based on the preamble resource after satisfying a trigger condition; the second obtaining unit 605' is in the preamble sequence and/or the foregoing The time-frequency resource is obtained by the user equipment, after the triggering condition is met, based on the foregoing preamble resource, and the beam information of the high-frequency transmission point relative to the user equipment and the identifier of the high-frequency transmission point are obtained from the user equipment; The second calculating unit 606' derives a beamforming vector of the high frequency transmission point with respect to the user equipment according to the beam information of the high frequency transmission point with respect to the user equipment.

In this embodiment, the beam information of the high frequency transmission point relative to the user equipment and the identification of the high frequency transmission point can be carried by message 3 (Message 3).

In this embodiment, the synchronization signal sent by the high frequency transmission point to the user equipment is an aperiodic synchronization signal.

In this embodiment, as shown in FIG. 6, the apparatus 600 may further include:

The second sending unit 607 sends the indication information to the user equipment to indicate whether the user equipment should continue to search for the synchronization signal.

In this embodiment, as described above, the indication information may be carried by a random access response, and the embodiment is not limited thereto.

With the apparatus of this embodiment, the low frequency transmission point configures a new preamble resource for the user equipment, so that the user equipment implicitly transmits the preamble sequence selected based on the preamble resource and/or the time-frequency resource of the preamble sequence. The ground indicates its link quality with the high frequency transmission point or the user equipment wants to establish a connection with the high frequency transmission point, thereby accelerating the synchronization and initial access process of the user equipment with the high frequency transmission point.

The embodiment of the present invention further provides a base station configured with the foregoing synchronization and access device 600 assisted by a low frequency network.

FIG. 7 is a schematic diagram of a base station according to an embodiment of the present invention. As shown in FIG. 7, the base station 700 can include: a central location A processor (CPU) 701 and a memory 702; a memory 702 is coupled to the central processor 701. Wherein the memory 702 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 701 to receive various information transmitted by the user equipment and to transmit various information to the user equipment. .

In one embodiment, the functionality of the synchronization and access device 600 assisted by the low frequency network may be integrated into the central processor 701. For example, the central processing unit 701 can be configured to perform control for configuring a preamble resource for the user equipment, such that the user equipment selects by transmitting to the low frequency transmission point based on the preamble resource after the trigger condition is met The preamble sequence and/or the time-frequency resource of the transmitting preamble implicitly indicates the link quality between the user equipment and the high frequency transmission point or the user's willingness to establish a connection with the high frequency transmission point.

In another embodiment, the synchronization and access device 600 assisted by the low frequency network can be configured separately from the central processor 701, for example, the synchronization and access device 600 assisted by the low frequency network can be configured as a chip coupled to the central processor 701. The function of the synchronization and access device 600 assisted by the low frequency network is implemented by the control of the central processing unit 701.

In addition, as shown in FIG. 7, the base station 700 may further include: a transceiver 703, an antenna 704, and the like; wherein the functions of the foregoing components are similar to those of the prior art, and details are not described herein again. It should be noted that the base station 700 also does not have to include all the components shown in FIG. 7; in addition, the base station 700 may further include components not shown in FIG. 7, and reference may be made to the prior art.

The base station in this embodiment configures a new preamble resource for the user equipment, so that the user equipment implicitly indicates the preamble sequence and/or the time-frequency resource of the preamble sequence that is selected based on the preamble resource. The link quality of the high frequency transmission point or the willingness of the user equipment to establish a connection with the high frequency transmission point, thereby accelerating the synchronization and initial access process of the user equipment with the high frequency transmission point.

Example 5

The embodiment of the present invention further provides a synchronization and access device assisted by a low frequency network. The device is configured on a user equipment, and the user equipment has implemented downlink synchronization with a low frequency transmission point of the low frequency network, because the device solves the problem. The principle of the method is similar to that of the embodiment 2. Therefore, the specific implementation can refer to the implementation of the method of the embodiment 2, and the description of the same portions is not repeated.

Figure 8 is a schematic diagram of the composition of the device. As shown in Figure 8, the device 800 includes:

a sending unit 801, after the user equipment meets the trigger condition, send the signal to the low frequency transmission point based on a preamble sequence selected by the preamble resource configured by the low frequency transmission point and/or a time-frequency resource of the preamble sequence, by which the user equipment and the high frequency transmission are implicitly indicated by the preamble sequence and/or the time-frequency resource The quality of the link between the points or the willingness of the user equipment to establish a connection with the high frequency transmission point.

In this embodiment, as shown in FIG. 8, the apparatus 800 may further include:

The determining unit 802 determines whether the user equipment meets a trigger condition, where the triggering condition is that the reference signal receiving power of the at least one high frequency transmission point is better than the reference signal receiving power of the low frequency transmission point, or is at least one high frequency transmission point. The reference signal received power is equivalent to the reference signal received power of the low frequency transmission point, or the reference signal received power of the at least one high frequency transmission point is greater than a predetermined threshold, or the user equipment has a desire to establish a connection with the high frequency transmission point.

In this embodiment, as shown in FIG. 8, the apparatus 800 may further include:

The measuring unit 803 performs cell search and measurement to obtain reference signal received power of at least one high frequency transmission point and reference signal received power of the above low frequency transmission point.

In this embodiment, as shown in FIG. 8, the apparatus 800 may further include:

The receiving unit 804 receives the indication information sent by the low frequency transmission point; the indication information can be carried by the random access response;

A determining unit 805 determines whether to continue searching for the synchronization signal based on the indication information.

In this embodiment, the user equipment may obtain beam information of the low frequency transmission point relative to the user equipment, and beam information of the high frequency transmission point relative to the user equipment and the high frequency transmission in a cell measurement and search phase. The identifier of the point, the sending unit 801 may further send, after the user equipment receives the random access response sent by the low-frequency transmission point, the beam information of the high-frequency transmission point relative to the user equipment to the low-frequency transmission point, and may Simultaneously transmitting the identifier of the high frequency transmission point, so that the low frequency transmission point derives the beamforming vector of the high frequency transmission point relative to the user equipment, and provides it as auxiliary information to the high frequency transmission point to trigger the high frequency The transmission point sends a synchronization signal. In this embodiment, the sending unit 801 can send the beam information of the high frequency transmission point relative to the user equipment and the identifier of the high frequency transmission point by using the message 3.

In this embodiment, as shown in FIG. 8, the apparatus 800 may further include:

a search unit 806 that searches for a synchronization signal;

A synchronization unit 807 that synchronizes with a transmission point that transmits the above-described synchronization signal.

With the apparatus of this embodiment, the user equipment may implicitly indicate the user equipment and the high frequency by transmitting a preamble sequence selected based on the preamble resource configured by the low frequency transmission point and/or a time-frequency resource of the preamble sequence. The link quality of the transmission point or the willingness of the user equipment to establish a connection with the high frequency transmission point, thereby accelerating the synchronization and initial access process of the user equipment with the high frequency transmission point.

The embodiment of the invention further provides a user equipment, which comprises the aforementioned synchronization and access device 800 assisted by a low frequency network.

FIG. 9 is a schematic diagram of a user equipment 900 according to an embodiment of the present invention. As shown in FIG. 9, the user device 900 can include a central processor 901 and a memory 902; the memory 902 is coupled to the central processor 901. It should be noted that the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.

In one embodiment, the functionality of the synchronization and access device 800 assisted by the low frequency network may be integrated into the central processor 901. For example, the central processor may be configured to perform control of transmitting a preamble sequence selected based on the preamble resources of the low frequency transmission point configuration to the low frequency transmission point after the user equipment satisfies the trigger condition and/or Or transmitting a time-frequency resource of the preamble sequence, implicitly indicating, by the preamble sequence and/or the time-frequency resource, a link quality between the user equipment and the high-frequency transmission point or a user equipment wants to communicate with a high frequency The willingness of the transmission point to establish a connection.

In another embodiment, the synchronization and access device 800 assisted by the low frequency network can be configured separately from the central processor 901, for example, the synchronization and access device 800 assisted by the low frequency network can be configured as a chip coupled to the central processor 901. The function of the synchronization and access device 800 assisted by the low frequency network is implemented by the control of the central processing unit 901.

As shown in FIG. 9, the user equipment 900 may further include: a communication module 903, an input unit 904, an audio processing unit 905, a display 906, and a power supply 907. It should be noted that the user equipment 900 does not have to include all the components shown in FIG. 9; in addition, the user equipment 900 may further include components not shown in FIG. 9, and reference may be made to the prior art.

As shown in FIG. 9, central processor 901, sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device that receives input and controls various aspects of user device 900. The operation of the part.

The memory 902 can be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device. Various information can be stored, and a program for executing related information can be stored. And the central processing unit 901 can execute the program stored in the memory 902 to implement information storage or processing and the like. The functions of other components are similar to those of the existing ones and will not be described here. User equipment The various components of 900 may be implemented by special purpose hardware, firmware, software or a combination thereof without departing from the scope of the invention.

The user equipment in this embodiment implicitly indicates the link quality of the user equipment and the high frequency transmission point by transmitting the preamble sequence selected based on the preamble resource configured by the low frequency transmission point and/or the time frequency resource of the transmission preamble sequence. Or the user equipment wants to establish a connection with the high frequency transmission point, thereby accelerating the synchronization and initial access process of the user equipment with the high frequency transmission point.

Example 6

The embodiment of the present invention further provides a synchronization and access device assisted by a low frequency network. The device is configured at a high frequency transmission point. Since the principle of solving the problem is similar to the method of the third embodiment, the specific implementation may be Referring to the implementation of the method of Embodiment 3, the description of the same portions will not be repeated.

FIG. 10 is a schematic diagram of the composition of the apparatus. As shown in FIG. 10, the apparatus 1000 includes: a receiving unit 1001 and a first sending unit 1002, wherein the receiving unit 1001 receives auxiliary information sent by a low-frequency transmission point, and the auxiliary information includes The high frequency transmission point is shaped with respect to a beam of the user equipment; the first transmitting unit 1002 transmits a synchronization signal to the user equipment using the beamforming vector.

In this embodiment, the synchronization signal is a non-periodic synchronization signal, and the first transmitting unit 1002 may transmit the synchronization signal by using the beamforming vector of the beamforming vector and the beam forming vector of the beam around the corresponding beam.

In this embodiment, as shown in FIG. 10, the apparatus 1000 may further include:

The second transmitting unit 1003 transmits a periodic synchronization signal.

With the device of the embodiment, the high-frequency transmission point can select the beam transmission synchronization signal according to the auxiliary information sent by the low-frequency transmission point, and accelerate the synchronization and initial access process of the user equipment and the high-frequency transmission point.

The embodiment of the present invention further provides a base station configured with the foregoing synchronization and access device 1000 assisted by a low frequency network.

11 is a schematic diagram of a base station according to an embodiment of the present invention. As shown in FIG. 11, the base station 1100 can include a central processing unit (CPU) 1101 and a memory 1102; the memory 1102 is coupled to the central processing unit 1101. The memory 1102 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 1101 to receive various information sent by the user equipment, and send various information to the user equipment. .

In one embodiment, the functionality of the synchronization and access device 1000 assisted by the low frequency network can be integrated Go to the central processor 1101. For example, the central processing unit 1101 can be configured to perform control of receiving auxiliary information transmitted by a low frequency transmission point, the auxiliary information including a beamforming vector of the high frequency transmission point with respect to a user equipment; using the beam The shaping vector sends a synchronization signal to the user equipment.

In another embodiment, the synchronization and access device 1000 assisted by the low frequency network may be configured separately from the central processor 1101, for example, the synchronization and access device 1000 assisted by the low frequency network may be configured as a chip coupled to the central processor 1101. The function of the synchronization and access device 1000 assisted by the low frequency network is implemented by the control of the central processing unit 1101.

In addition, as shown in FIG. 11, the base station 1100 may further include: a transceiver 1103, an antenna 1104, and the like; wherein the functions of the foregoing components are similar to the prior art, and details are not described herein again. It should be noted that the base station 1100 does not have to include all the components shown in FIG. 11; in addition, the base station 1100 may further include components not shown in FIG. 11, and reference may be made to the prior art.

The base station in the embodiment of the present invention can select a beam transmission synchronization signal according to the auxiliary information sent by the low frequency transmission point, and accelerate the synchronization and initial access process of the user equipment and the high frequency transmission point.

Example 7

The embodiment of the present invention further provides a communication system, including the base station according to Embodiment 4, the user equipment described in Embodiment 5, and the base station described in Embodiment 6.

12 is a schematic diagram of a communication system according to an embodiment of the present invention. As shown in FIG. 12, the communication system 1200 includes base stations 1201, 1202 and user equipment 1203. The base station 1201 is a low-frequency transmission point, which may be the base station 700 described in Embodiment 4; the base station 1202 is a high-frequency transmission point, which may be the base station 1100 described in Embodiment 6, and the user equipment 1203 may be an embodiment. 5 user equipment 900. Since the base stations 700, 1100 and the user equipment 900 have been described in detail in the foregoing embodiments, the contents thereof are incorporated herein, and are not described herein again.

Through the communication system of the embodiment, in the high-band non-independent operation mode, the low-frequency network can trigger the high-frequency network to transmit the synchronization signal, and accelerate the synchronization of the terminal and the high-frequency network and the initial access process.

Embodiments of the present invention also provide a computer readable program, wherein when the program is executed in a synchronization and access device or base station assisted by a low frequency network, the program causes a computer to synchronize and assist in the low frequency network The synchronization and access method assisted by the low frequency network described in Embodiment 1 or 3 is performed in the access device or the base station.

Embodiments of the present invention also provide a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the method described in Embodiment 1 or 3 in a synchronization and access device or base station assisted by a low frequency network. Synchronization and access methods assisted by low frequency networks.

Embodiments of the present invention also provide a computer readable program, wherein the program causes a computer to be synchronized by the low frequency network when the program is executed in a synchronization and access device or user equipment assisted by a low frequency network The low frequency network assisted synchronization and access method described in Embodiment 2 is performed in an access device or user equipment.

Embodiments of the present invention also provide a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the method described in Embodiment 2 in a synchronization and access device or user equipment assisted by a low frequency network Low frequency network assisted synchronization and access methods.

The above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software. The present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps. Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like. The present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

The synchronization and access device and/or the synchronization and access method described in connection with the embodiments of the present invention may be directly embodied as hardware, a software module executed by a processor, or a combination of both. For example, one or more of the functional blocks shown in Figures 6, 8, 10 and/or one or more combinations of functional blocks may correspond to individual software modules of a computer program flow, or to individual hardware. Module. These software modules may correspond to the various steps shown in Figures 1-3, respectively. These hardware modules can be implemented, for example, by curing these software modules using a Field Programmable Gate Array (FPGA).

The software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. A storage medium can be coupled to the processor to enable the processor to read information from, and write information to, the storage medium; or the storage medium can be an integral part of the processor. The processor and the storage medium can be located in an ASIC. The software module can be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if a device (such as a mobile terminal) uses a larger capacity MEGA-SIM card or a large-capacity flash memory device, the software module can be stored on the MEGA-SIM card or In a large-capacity flash memory device.

One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein. An application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof. One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.

The present invention has been described in connection with the specific embodiments thereof, and it should be understood by those skilled in the art that A person skilled in the art can make various modifications and changes to the present invention within the scope of the present invention.

Claims (20)

1. A synchronization and access device assisted by a low frequency network, the device being configured at a low frequency transmission point, wherein the device comprises:

   a configuration unit, configured to configure a preamble resource for the user equipment, so that the user equipment sends a preamble sequence and/or a preamble sequence selected based on the preamble resource to the low frequency transmission point after the trigger condition is met The time-frequency resource implicitly indicates the link quality between the user equipment and the high-frequency transmission point or the user's willingness to establish a connection with the high-frequency transmission point.
2. The apparatus according to claim 1, wherein the preamble resource is a preamble sequence group comprising a plurality of preamble sequences, or a preamble sequence, or a time-frequency resource for transmitting a preamble sequence.
3. The apparatus of claim 1 wherein said apparatus further comprises:

   a first sending unit, after the low frequency transmission point receives the preamble sequence sent by the user equipment, sending auxiliary information to the high frequency transmission point to trigger the high frequency transmission point to the user The device sends a sync signal.
4. The apparatus according to claim 3, wherein the auxiliary information is a beamforming vector of the high frequency transmission point with respect to the user equipment, the apparatus further comprising:

   a first receiving unit, which receives a preamble sequence sent by the user equipment and/or a time-frequency resource of a preamble sequence;

   a first detecting unit, configured to detect the preamble sequence and/or the time-frequency resource to determine whether the preamble sequence and/or the time-frequency resource is based on the user equipment after satisfying a trigger condition The preamble resource is selected and sent;

   a first acquiring unit, when the preamble sequence and/or the time-frequency resource is selected and sent by the user equipment based on the preamble resource after satisfying a trigger condition, from the preamble sequence and And/or the time-frequency resource obtains beam information of the low-frequency transmission point relative to the user equipment;

   a first calculating unit, which derives a beamforming vector of the high frequency transmission point relative to the user equipment according to the beam information of the low frequency transmission point relative to the user equipment.
5. The apparatus according to claim 3, wherein the auxiliary information is a beamforming vector of the high frequency transmission point with respect to the user equipment, the apparatus further comprising:

   a second receiving unit, when receiving the preamble sequence and/or transmitting the preamble sequence sent by the user equipment Frequency resource

   a second detecting unit, configured to detect the preamble sequence and/or the time-frequency resource to determine whether the preamble sequence and/or the time-frequency resource is based on the user equipment after satisfying a trigger condition The preamble resource is selected and sent;

   a second acquiring unit, when the preamble sequence and/or the time-frequency resource is selected and sent by the user equipment based on the preamble resource after satisfying a trigger condition, acquiring high from the user equipment a beam transmission point relative to the beam information of the user equipment and an identifier of the high frequency transmission point;

   a second calculating unit that calculates a beamforming vector of the high frequency transmission point relative to the user equipment according to the beam information of the high frequency transmission point relative to the user equipment.
6. The apparatus according to claim 5, wherein said high frequency transmission point is carried by message 3 with respect to beam information of said user equipment and said identification of said high frequency transmission point.
7. The apparatus of claim 3 wherein said synchronization signal is a non-periodic synchronization signal.
8. The apparatus of claim 1 wherein said apparatus further comprises:

   And a second sending unit that sends indication information to the user equipment, where the indication information indicates whether the user equipment should continue to search for a synchronization signal.
9. The apparatus of claim 8, wherein the indication information is carried by a random access response.
10. A synchronization and access device assisted by a low frequency network, the device being configured on a user equipment, the user equipment having implemented downlink synchronization with a low frequency transmission point, wherein the apparatus comprises:

    a sending unit, after the user equipment meets the trigger condition, sending a preamble sequence and/or a time-frequency resource of the preamble sequence selected according to the preamble resource configured by the low-frequency transmission point to the low-frequency transmission point, The link quality between the user equipment and the high frequency transmission point or the willingness of the user equipment to establish a connection with the high frequency transmission point is implicitly indicated by the preamble sequence and/or the time-frequency resource.
11. The device of claim 10, wherein the device further comprises:

    a determining unit, determining whether the user equipment meets a trigger condition, where the trigger condition is that the reference signal receiving power of the at least one high frequency transmission point is better than the reference signal receiving power of the low frequency transmission point, or at least one high frequency transmission The reference signal received power of the point is equivalent to the reference signal received power of the low frequency transmission point, or the reference signal received power of the at least one high frequency transmission point is greater than a predetermined threshold, or the user equipment wants to establish with the high frequency transmission point connection.
12. The apparatus of claim 11 wherein said apparatus further comprises:

    And a measurement unit that performs cell search and measurement to obtain reference signal received power of the at least one high frequency transmission point and reference signal received power of the low frequency transmission point.
13. The device of claim 10, wherein the device further comprises:

    a receiving unit, which receives indication information sent by the low frequency transmission point;

    A determining unit that determines whether to continue searching for the synchronization signal based on the indication information.
14. The apparatus of claim 13, wherein the indication information is carried by a random access response.
15. The apparatus according to claim 10, wherein said transmitting unit further transmits said high frequency transmission point to said low frequency transmission point after said user equipment receives said random access response transmitted by said low frequency transmission point The beam information of the user equipment and the identifier of the high frequency transmission point.
16. The apparatus according to claim 15, wherein said transmitting unit transmits the beam information of said high frequency transmission point with respect to said user equipment and the identification of said high frequency transmission point by message 3.
17. The device of claim 10, wherein the device further comprises:

    a search unit that searches for a synchronization signal;

    A synchronization unit that synchronizes with a transmission point that transmits the synchronization signal.
18. A synchronization and access device assisted by a low frequency network, the device being configured at a high frequency transmission point, wherein the device comprises:

    a receiving unit, which receives auxiliary information sent by a low frequency transmission point, where the auxiliary information includes a beamforming vector of the high frequency transmission point relative to the user equipment;

    a first transmitting unit that transmits a synchronization signal to the user equipment using the beamforming vector.
19. The apparatus of claim 18, wherein the synchronization signal is a non-periodic synchronization signal, the apparatus further comprising:

    A second transmitting unit that transmits a periodic synchronization signal.
20. The apparatus of claim 18, wherein the first transmitting unit transmits the synchronization signal using a beamforming vector of the beamforming vector and a beam around the corresponding beam.

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