CN108282905B

CN108282905B - Random access method and network element thereof

Info

Publication number: CN108282905B
Application number: CN201710010981.1A
Authority: CN
Inventors: 周凯捷; 邓天乐
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-01-06
Filing date: 2017-01-06
Publication date: 2020-04-21
Anticipated expiration: 2037-01-06
Also published as: CN108282905A; WO2018127079A1

Abstract

A random access method and network elements thereof, the method comprising: receiving one or more beam reference signals from a target high frequency base station; transmitting signal quality information of part or all of the beam reference signals in the one or more beam reference signals to a target high-frequency base station through the target low-frequency base station; receiving information of a random access resource corresponding to a target beam from the target high-frequency base station, wherein the target beam is obtained based on the signal quality information; and sending a random access request to the target high-frequency base station by using the random access resource. By adopting the embodiment of the invention, the terminal can send the random access request by using the random access resources distributed by the high-frequency base station, and the target high-frequency base station is not required to reserve a plurality of possible random access resources for the terminal to select, thereby improving the resource utilization rate.

Description

Random access method and network element thereof

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a random access method and a network element thereof.

Background

The fifth generation mobile communication technology (5G) is a next generation mobile communication technology that is being developed after the fourth generation mobile communication technology (4G), and is a wireless mobile communication technology that faces the future demand of the human information society. To meet the high-rate communication requirement, 5G can be transmitted using high-frequency (e.g., carrier frequency >6GHz) signals.

In order to reduce the loss of high-frequency signal transmission, a beam forming (beam forming) technique is generally used to improve the signal quality when high-frequency signals are transmitted, that is, narrower beams are used to transmit signals. The signal coverage area of the narrower beam is relatively small, and a plurality of narrower beams in different directions are required to transmit signals to meet the requirement of the high-frequency base station signal on full cell coverage. Therefore, the high frequency base station needs to receive/transmit the beam-formed signals in each direction in a time division manner, so as to realize the coverage of the whole cell. Since it is difficult to determine which direction terminal will initiate a Random Access request to the high frequency base station, the high frequency base station needs to reserve respective Random Access resources for each possible uplink signal receiving direction, such as the number and interval of Random Access Channel (RACH) Access time slots, and the unused Random Access resources are wasted. Therefore, how to reduce the waste of random access resources as much as possible while ensuring the signal transmission quality of the high-frequency base station becomes a problem which needs to be solved at present.

Disclosure of Invention

The application provides a random access method and a network element thereof, aiming to improve the resource utilization rate.

In a first aspect, a random access method is provided, including:

the terminal receives one or more beam reference signals from a target high-frequency base station;

the terminal sends signal quality information of part or all of the beam reference signals in the one or more beam reference signals to a target high-frequency base station through a target low-frequency base station;

the terminal receives information of random access resources corresponding to a target beam from the target high-frequency base station, wherein the target beam is obtained based on the signal quality information;

and the terminal sends a random access request to the target high-frequency base station by using the random access resource.

In the first aspect, a terminal sends signal quality information of part or all of beam reference signals in one or more beam reference signals to a target high-frequency base station through a target low-frequency base station, obtains information of random access resources corresponding to a target beam sent by the target high-frequency base station, and sends a random access request to the target high-frequency base station by using the random access resources, so that the target high-frequency base station does not need to reserve a plurality of possible random access resources for the terminal to select, and the resource utilization rate is improved.

In the first aspect, if the terminal sends the signal quality information of the beam reference signal to the target high frequency base station through the target low frequency base station, the signal quality information may include identification information of the beam reference signal and signal quality of the beam reference signal, or may only include identification information of the beam reference signal; if the terminal sends the signal quality information of the filtered multiple beam reference signals to the target high frequency base station through the target low frequency base station, the signal quality information of the filtered multiple beam reference signals may include identification information of the beam reference signals and signal quality of the beam reference signals, and the filtered multiple beam reference signals are filtered from one or more beam reference signals by the terminal according to a quality condition.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the signal quality of the part or all of the beam-reference signals satisfies a quality condition.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the quality condition is signal strength top N, where N is a natural number greater than or equal to 1.

With reference to the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the quality condition is that the signal strength satisfies a threshold range.

With reference to the first aspect or any one of the first to third possible implementation manners of the first aspect, in a fourth possible implementation manner of the first aspect, the sending, by the terminal, signal quality information of some or all of the one or more beam reference signals to the target high frequency base station through the target low frequency base station includes:

the terminal sends the signal quality information to the target low-frequency base station through a Physical Uplink Shared Channel (PUSCH) so that the target low-frequency base station sends the signal quality information to the target high-frequency base station; or the like, or, alternatively,

the terminal sends the signal quality information to the target low-frequency base station through a Physical Uplink Control Channel (PUCCH) so that the target low-frequency base station sends the signal quality information to the target high-frequency base station; or the like, or, alternatively,

the terminal sends a message 3msg3 message carrying the signal quality information to the target low-frequency base station, so that the target low-frequency base station sends the signal quality information to the target high-frequency base station; or the like, or, alternatively,

and the terminal sends a first Radio Resource Control (RRC) message carrying the signal quality information to the target low-frequency base station so that the target low-frequency base station sends the signal quality information to the target high-frequency base station.

With reference to the first aspect or any one of the first to the fourth possible implementation manners of the first aspect, in a fifth possible implementation manner of the first aspect, the method further includes:

the terminal acquires the corresponding relation between the target high-frequency base station and the target low-frequency base station;

and the terminal selects the target low-frequency base station according to the corresponding relation.

With reference to the first aspect or any one of the first possible implementation manner to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the receiving, by the terminal, information of a random access resource corresponding to a target beam from the target high-frequency base station includes:

the terminal receives the information of the random access resource from the target high-frequency base station through a Physical Downlink Control Channel (PDCCH); or the like, or, alternatively,

the terminal receives the information of the random access resource from the target high-frequency base station through a Physical Downlink Shared Channel (PDSCH); or the like, or, alternatively,

the terminal receives a broadcast message from the target high-frequency base station, wherein the broadcast message comprises the information of the random access resource; or the like, or, alternatively,

the terminal receives the information of the random access resource from the target low-frequency base station through a Physical Downlink Shared Channel (PDSCH), wherein the information of the random access resource is received by the target low-frequency base station from the target high-frequency base station; or the like, or, alternatively,

the terminal receives the information of the random access resource from the target low-frequency base station through a Physical Downlink Control Channel (PDCCH), wherein the information of the random access resource is received by the target low-frequency base station from the target high-frequency base station; or the like, or, alternatively,

the terminal receives a second Radio Resource Control (RRC) message from the target low-frequency base station, wherein the second RRC message carries information of the random access resource, and the information of the random access resource is received by the target low-frequency base station from the target high-frequency base station; or the like, or, alternatively,

and the terminal receives a broadcast message from the target low-frequency base station, wherein the broadcast message carries the information of the random access resource.

In a second aspect, a random access method is provided, including:

the target high-frequency base station transmits one or more beam reference signals to the terminal;

the target high-frequency base station receives signal quality information of part or all of the beam reference signals in the one or more beam reference signals from the terminal;

the target high-frequency base station selects a target wave beam according to the signal quality information;

and the target high-frequency base station sends information of random access resources corresponding to the target wave beam to the terminal.

In the second aspect, the target high-frequency base station receives signal quality information of part or all of the beam reference signals in the one or more beam reference signals from the terminal, selects a target beam and allocates corresponding random access resources according to the signal quality information, and does not need to reserve a plurality of possible random access resources for the terminal to select, thereby improving the resource utilization rate.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the sending, by the target high frequency base station, information of a random access resource corresponding to the target beam to the terminal includes:

the target high-frequency base station sends information of random access resources corresponding to the target wave beam to the user terminal through a Physical Downlink Control Channel (PDCCH); or the like, or, alternatively,

the target high-frequency base station sends information of random access resources corresponding to the target wave beam to the user terminal through a Physical Downlink Shared Channel (PDSCH); or the like, or, alternatively,

and the target high-frequency base station sends a broadcast message, and the broadcast message carries the information of the random access resource.

In a third aspect, a random access method is provided, including:

the target low-frequency base station receives signal quality information of part or all of one or more beam reference signals from a terminal;

and the target low-frequency base station sends the signal quality information to a target high-frequency base station.

In the third aspect, the target low-frequency base station forwards the signal quality information of part or all of the beam reference signals in one or more beam reference signals sent by the terminal to the target high-frequency base station, so that the target high-frequency base station allocates random access resources for the terminal, and the target high-frequency base station does not need to reserve a plurality of possible random access resources for the terminal to select, thereby improving the resource utilization rate.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the receiving, by the target low frequency base station, signal quality information of part or all of one or more beam reference signals from a terminal includes:

a target low-frequency base station receives signal quality information of part or all of one or more beam reference signals from a terminal through a Physical Uplink Shared Channel (PUSCH); or the like, or, alternatively,

a target low-frequency base station receives signal quality information of part or all of one or more beam reference signals from a terminal through a Physical Uplink Control Channel (PUCCH); or the like, or, alternatively,

the target low-frequency base station receives a message 3msg3 message from the terminal, wherein the message 3msg3 message carries signal quality information of part or all of one or more beam reference signals; or the like, or, alternatively,

the target low-frequency base station receives a first Radio Resource Control (RRC) message from the terminal, wherein the first RRC message carries signal quality information of part or all of one or more beam reference signals.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, after the target low frequency base station transmits the signal quality information to the target high frequency base station, the method further includes:

the target low-frequency base station receives information of random access resources corresponding to a target beam from a high-frequency base station, wherein the target beam is obtained based on the signal quality information;

and the target low-frequency base station sends the information of the random access resource to a terminal.

With reference to the third aspect or the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the sending, by the target low frequency base station, the information of the random access resource to the terminal includes:

the target low-frequency base station sends the information of the random access resource to a terminal through a Physical Downlink Shared Channel (PDSCH); or the like, or, alternatively,

the target low-frequency base station sends the information of the random access resource to a terminal through a Physical Downlink Control Channel (PDCCH); or the like, or, alternatively,

the target low-frequency base station sends a second Radio Resource Control (RRC) message to the terminal, wherein the second RRC message carries the information of the random access resource; or the like, or, alternatively,

and the target low-frequency base station sends a broadcast message to a terminal, wherein the broadcast message carries the information of the random access resource.

In a fourth aspect, a terminal is provided that includes a transceiver and a processor; the processor is configured to:

receiving, by the transceiver, one or more beam-reference signals from a target high-frequency base station;

transmitting, by the transceiver, signal quality information of some or all of the one or more beam-reference signals to a target high-frequency base station using a target low-frequency base station;

receiving, by the transceiver, information of a random access resource corresponding to a target beam from the target high frequency base station, the target beam being obtained based on the signal quality information;

and sending a random access request to the target high-frequency base station by using the random access resource through the transceiver.

In a fifth aspect, there is provided a high frequency base station comprising a transceiver and a processor, the processor being configured to:

transmitting, by the transceiver, one or more beam-reference signals to a terminal;

receiving, by the transceiver, signal quality information of some or all of the one or more beam-reference signals from the terminal;

selecting a target beam according to the signal quality information;

and sending the information of the random access resource corresponding to the target wave beam to the terminal through the transceiver.

In a sixth aspect, there is provided a low frequency base station comprising a transceiver and a processor, the processor being configured to:

receiving, by the transceiver, signal quality information of part or all of one or more beam-reference signals from a terminal;

and transmitting the signal quality information to a target high-frequency base station through the transceiver.

In a seventh aspect, an embodiment of the present invention further provides a communication system, including the high-frequency base station in the fifth aspect and the low-frequency base station in the sixth aspect.

In an eighth aspect, an embodiment of the present invention further provides a computer program product, where the computer program product includes instructions for implementing the YY method in the first, second, or third aspects.

In a ninth aspect, the present invention also provides a computer-readable storage medium for storing the instructions of the computer program of the first, second or third aspect.

Drawings

Fig. 1 is a diagram of a network architecture of a possible communication system according to an embodiment of the present invention;

fig. 2 is a diagram of a network architecture of another possible communication system according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating a random access method according to an embodiment of the present invention;

fig. 3-1 is a schematic diagram of beam transmission according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating another random access method according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating another random access method according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a high frequency base station according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a low frequency base station according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the present application, the signal quality information is mainly taken as an example of signal strength, but is not limited to signal strength, and may include other performance parameters such as signal-to-noise ratio that can be used to indicate signal quality. In the present application, a Physical Downlink Control Channel (PDCCH) is used to describe a Channel for carrying Downlink scheduling information, such as Channel allocation and Control information; a Physical Downlink Shared Channel (PDSCH) is used to describe channels carrying Downlink traffic data, paging messages, etc.; a message 3(msg3) is used to describe a third message sent by the terminal in the random access process, and the third message can carry a Radio Resource Control (RRC) connection request, a Control message or a service data packet, and the like; RRC messages are used to describe third layer information of the control plane between the terminal and the base station, for example, to support broadcasting of upper layer information and the like. In fact, the present application does not limit the above names to describe the corresponding functions, and other names may be used to describe the corresponding functions.

Referring to fig. 1, fig. 1 is a diagram illustrating a network architecture of a possible communication system according to an embodiment of the present invention.

As shown in fig. 1, base station 2, and base station 3 … …, base station n (n is greater than or equal to 1 and is a natural number), which has both functions of a high frequency base station and a low frequency base station, that is, each of the above base stations can transmit/receive a high frequency signal and also can transmit/receive a low frequency signal, and information between a high frequency base station functional entity and a low frequency base station functional entity in the base station can be transmitted through the inside of the base station. When the terminal a needs to perform high-frequency random access, it needs to first determine which base station the terminal a should select for random access.

In the embodiment of the present invention, each base station may periodically broadcast one or more beam reference signals, and when the terminal a receives the beam reference signal, one base station may be selected as a target base station, for example, by taking signal strength according to the signal quality information of the beam reference signal, that is, the terminal a selects a base station for random access. For example, terminal a receives beam reference signal a broadcast by base station 1, beam reference signals b and c broadcast by base station 2, and beam reference signal d broadcast by base station 3, and assuming that a preset threshold range of signal strength has been set, according to the signal strength of the beam reference signal, terminal a may select a base station whose signal strength meets the requirement of the preset threshold range as a target base station. The terminal A sends the quality information of the beam reference signal to the target base station so as to enable the target base station to allocate proper random access resources, and the terminal A can use the random access resources to send a random access request to the target base station to realize a random access process. In the embodiments of the present invention, the high frequency base station functional entity of the base station is described as an independent high frequency base station, and the low frequency base station functional entity of the base station is described as an independent low frequency base station.

Referring to fig. 2, fig. 2 is a diagram illustrating a network architecture of another possible communication system according to an embodiment of the present invention. As shown in fig. 2, a high frequency base station 1, a high frequency base station 2, and a high frequency base station 3 … … are deployed respectively, where m is greater than or equal to 1 and is a natural number, and a low frequency base station 1, a low frequency base station 2, and a low frequency base station 3 … … is deployed respectively, where the high frequency base station transmits/receives a high frequency signal, the low frequency base station transmits/receives a low frequency signal, information transmission can be performed between the high frequency base station and the low frequency base station through an X2 interface, and values of m and s may be the same or different. When the terminal a needs to perform high-frequency random access, it needs to first determine which high-frequency base station the terminal a should select for random access.

In the embodiment of the present invention, each high frequency base station may periodically broadcast one or more beam reference signals, and when the terminal a receives the beam reference signal, one high frequency base station may be selected as a target high frequency base station according to signal quality information of the beam reference signal, taking signal strength as an example, that is, the terminal a selects a high frequency base station for random access. For example, the terminal a receives the beam reference signal a broadcast by the high frequency base station 1, the beam reference signals b and c broadcast by the high frequency base station 2, and the beam reference signal d broadcast by the high frequency base station 3, and assuming that a preset threshold range of signal strength has been set, according to the signal strength of the beam reference signal, the terminal a may select a high frequency base station whose signal strength meets the requirement of the preset threshold range as the target high frequency base station.

The correspondence between each low frequency base station and each high frequency base station may be one-to-one, one-to-many, or many-to-one. Each low frequency base station may periodically broadcast base station matching information, which includes the high frequency base station to which the low frequency base station corresponds. For example, the high frequency base stations corresponding to the low frequency base station 1 are the high frequency base station 1 and the high frequency base station 2, the high frequency base station corresponding to the low frequency base station 2 is the high frequency base station 3, and the high frequency base station corresponding to the low frequency base station 3 is the high frequency base station 3. After the terminal a determines the target high frequency base station, the low frequency base station may be determined according to the target high frequency base station, for example, the target high frequency base station is the high frequency base station 2, and then the terminal may select the low frequency base station 1 as the target low frequency base station. According to the information interaction among the terminal A, the target low-frequency base station and the target high-frequency base station, the terminal can obtain corresponding random access resources and sends a random access request to the target base station by using the random access resources, so that the random access process is realized. The embodiments described later mainly take the case where the high frequency base station and the low frequency base station are deployed independently, and may also be applied to the communication system shown in fig. 1 where the high frequency base station and the low frequency base station are deployed together as one base station.

Referring to fig. 3, fig. 3 is a flowchart illustrating a random access method according to an embodiment of the present invention, which is applicable to the communication systems of fig. 1 and fig. 2. Fig. 3-1 is a schematic diagram of beam transmission according to an embodiment of the present invention. As shown in fig. 3, the random access method includes steps S101 to S106.

S101, the target high-frequency base station sends one or more beam reference signals to the terminal.

Correspondingly, the terminal receives one or more beam reference signals from the target high-frequency base station.

Specifically, one high frequency base station may transmit one or more beam reference signals in different directions in a time division manner. For example, as shown in FIG. 3-1, the high frequency base station may transmit beam B1 at time T1 and may transmit beam B2 at time T2. In the embodiment of the invention, the target high-frequency base station refers to a high-frequency base station which realizes random access with the terminal in advance, and the target high-frequency base station can be selected by the terminal. The terminal can receive all beam reference signals sent by a plurality of high-frequency base stations, group all the received beam reference signals according to the high-frequency base stations to which the beam reference signals belong, and select a group of corresponding high-frequency base stations with the largest number of the beam reference signals as a target high-frequency base station, or select a group of corresponding high-frequency base stations with the largest average signal intensity value as the target high-frequency base station, or select a group of corresponding high-frequency base stations with the largest number of the beam reference signals with the signal intensity meeting the requirement of a certain preset threshold range as the target high-frequency base station.

For example, as shown in FIG. 2, a beam reference signal a broadcast by the high frequency base station 1 with a signal strength of-120 dBm, beam reference signals b and c broadcast by the high frequency base station 2 with signal strengths of-90 dBm and-80 dBm, and beam reference signal d broadcast by the high frequency base station 3 with a signal strength of-100 dBm are received; arranging the signal intensity of the signals according to a descending order, wherein the order is as follows: c. b, d, a. Some possible cases are listed here according to different values of N as follows: assuming that N is 1, that is, the terminal obtains a beam reference signal c with the maximum signal intensity, selects a high-frequency base station 2 for transmitting c as a target base station, and then obtains signal quality information of c; assuming that N is 2, the terminal may obtain beam reference signals c and b, and select the high frequency base station 2 that transmits c and b as a target base station, and then obtain the signal quality information of c and the signal quality information of b; assuming that N is 3, the terminal may obtain beam reference signals c, b, and d, 2 high frequency base stations transmitting c, b, and d, and the high frequency base station 2 and the high frequency base station 3, the terminal may select one of the high frequency base station 2 and the high frequency base station 3 as a target high frequency base station, or the terminal selects the high frequency base station 2 with the large number of beam reference signals as the target high frequency base station, and then obtains the signal quality information of c and the signal quality information of b.

For another example, as shown in fig. 2, terminal a receives beam reference signal a broadcast by high frequency base station 1 with signal strength of-120 dBm, beam reference signals b and c broadcast by high frequency base station 2 with signal strengths of-90 dBm and-80 dBm, and beam reference signal d broadcast by high frequency base station 3 with signal strength of-100 dBm. Some possible cases are listed here according to the preset threshold range of signal strength as follows: assuming that the preset threshold range of the signal strength is greater than-100 dBm, the beam reference signals b and c meet the requirement of the preset threshold range, and the terminal a can select the high-frequency base station 2 as a target high-frequency base station and then acquire the signal quality information of b and the signal quality information of c; assuming that the preset threshold range of the signal strength is greater than-110 dBm, the beam reference signals b, c, and d satisfy the above preset threshold range requirement, the terminal a may select one of the high frequency base station 2 and the high frequency base station 3 as the target high frequency base station, or the terminal selects the high frequency base station 2 with a large number of beam reference signals as the target high frequency base station, for example, the high frequency base station 2, and then acquires the signal quality information of b and the signal quality information of c.

The terminal may receive one or more beam reference signals transmitted by the target high frequency base station, and detect the signal quality of some or all of the beam reference signals, i.e. execute step S102.

S102, the terminal sends signal quality information of part or all of the beam reference signals in the one or more beam reference signals to the target low-frequency base station.

Correspondingly, the target low-frequency base station receives the signal quality information of part or all of the beam reference signals in the one or more beam reference signals from the terminal.

Specifically, the terminal may send signal quality information of all beam reference signals in the one or more beam reference signals to the target low frequency base station, or may screen out a part of the beam reference signals from the one or more beam reference signals according to a quality condition, and then send the signal quality information of the part of the beam reference signals to the target low frequency base station. The quality condition may be sent to the terminal by the target high-frequency base station, or may be obtained according to a communication standard convention, and the quality condition may be N before the signal strength ranking, where N is a natural number greater than or equal to 1, or may be that the signal strength satisfies a threshold range. For example, as shown in fig. 2, if the target high frequency base station is the high frequency base station 2, and one or all of the beam reference signals transmitted by the high frequency base station 2 are b, c, the signal quality information of b, c may be transmitted to the target high frequency base station; c with the first signal strength rank can be selected from the obtained signals, and the signal quality information of the c is sent to the target high-frequency base station; or selecting the beam reference signals b and c with the signal strength meeting the preset threshold range from the beam reference signals b and c, and then sending the signal quality information of the b and c to the target high-frequency base station. The preset threshold range may be sent to the terminal by the target high-frequency base station, or may be obtained according to a communication standard convention. In this embodiment of the present invention, if the terminal sends the signal quality information of the beam reference signal to the target high frequency base station through the target low frequency base station, the signal quality information of the beam reference signal may include identification information of the beam reference signal and signal quality of the beam reference signal, or may only include identification information of the beam reference signal. If the terminal sends the signal quality information of the filtered multiple beam reference signals to the target high frequency base station through the target low frequency base station, the signal quality information of the filtered multiple beam reference signals may include identification information of the beam reference signals and signal quality of the beam reference signals, so that after the target low frequency base station forwards the signal quality information to the target high frequency base station, the target high frequency base station selects one of the multiple beam reference signals as a target beam according to the signal quality of the beam reference signal. Wherein the filtered plurality of beam reference signals are filtered by the terminal from one or more beam reference signals according to a quality condition.

In the embodiment of the present invention, the target low frequency base station may be determined by a terminal, and the terminal acquires a correspondence between the target high frequency base station and the target low frequency base station, and then selects the target low frequency base station according to the correspondence. The specific determination method of the target low-frequency base station comprises the following steps: and the terminal acquires base station matching information broadcasted by at least one low-frequency base station, and then selects one low-frequency base station corresponding to the target high-frequency base station as a target low-frequency base station according to the base station matching information broadcasted by the at least one low-frequency base station. Wherein the base station matching information includes at least one high frequency base station corresponding to each low frequency base station. The low frequency base station can periodically broadcast the base station matching information, and the terminal acquires the base station matching information broadcast by at least one low frequency base station. As shown in fig. 2, the high frequency base stations corresponding to the low frequency base station 1 are the high frequency base station 1 and the high frequency base station 2, the high frequency base station corresponding to the low frequency base station 2 is the high frequency base station 3, and the high frequency base station corresponding to the low frequency base station 3 is the high frequency base station 3. If the target high-frequency base station is the high-frequency base station 1, the terminal selects the low-frequency base station 1 as the target low-frequency base station; if the target high frequency base station is the high frequency base station 3, the terminal may select one of the low frequency base stations from the low frequency base station 2 and the low frequency base station 3 as the target low frequency base station.

In the embodiment of the present invention, if the target low frequency base station and the terminal have established a communication connection, the terminal may send the signal quality information to the target low frequency base station through a physical uplink shared channel PUSCH, or may send the signal quality information to the target low frequency base station through a physical uplink control channel PUCCH. And if the terminal is not connected with the target low-frequency base station, the terminal sends a message 3(msg3) message carrying the signal quality information to the target low-frequency base station, or sends a first RRC message carrying the signal quality information to the target low-frequency base station.

S103, the target low-frequency base station sends signal quality information of part or all of the beam reference signals in the one or more beam reference signals to the target high-frequency base station.

Correspondingly, the target high-frequency base station receives the signal quality information of part or all of the beam reference signals in the one or more beam reference signals from the target low-frequency base station.

Specifically, if the target low-frequency base station and the target high-frequency base station are deployed in a unified manner, the low-frequency base station may transmit the signal quality information to the target high-frequency base station through the internal transmission of the base station; if the low-frequency base station and the high-frequency base station are deployed independently, the target low-frequency base station and the target high-frequency base station may be connected through an ideal backhaul (backhaul) or a non-ideal backhaul, and the target low-frequency base station transmits the signal quality information to the target high-frequency base station through the ideal backhaul or the non-ideal backhaul.

S104, the target high-frequency base station selects a target beam according to the signal quality information.

Specifically, the target high frequency base station may select the target beam according to the signal quality information, and the selection rule may be defined based on a communication standard or may be configured in the target high frequency base station. For example, as shown in fig. 2, if the target high frequency base station is the high frequency base station 2, and the high frequency base station 2 receives the signal quality information of b and c from the target low frequency base station, the target high frequency base station may select a target beam satisfying a preset rule that a beam reference signal with the maximum signal strength is selected as the target beam, for example, the target high frequency base station selects c with the maximum signal strength as the target beam, according to the signal quality information. In the embodiment of the present invention, if the terminal sends signal quality information of a beam reference signal to the target high frequency base station, the target high frequency base station determines the beam as a target beam, and the target high frequency base station may obtain the random access resource corresponding to the target beam according to the identification information of the target beam. If the terminal sends the signal quality information of the multiple beam reference signals to the target high-frequency base station, the target high-frequency base station can select one beam reference signal as a target beam according to the signal quality in the signal quality information of the target beam, and obtain the random access resource corresponding to the target beam according to the identification information of the target beam. And the random access resource is distributed to the terminal by the target high-frequency base station.

And S105, the target high-frequency base station sends the information of the random access resource corresponding to the target wave beam to the terminal.

Correspondingly, the terminal receives the information of the random access resource corresponding to the target beam from the target high-frequency base station.

Specifically, the information of the random access resource may be configuration information of the random access resource regarding a frequency domain and/or a time domain, or may be understood as a frequency domain resource and/or a time domain resource in the random access resource.

Optionally, the target high-frequency base station may send the information of the random access resource to the terminal through a physical downlink control channel PDCCH or a physical downlink shared channel PDSCH, or send a broadcast message to the terminal, where the broadcast message carries the information of the random access resource.

Optionally, the target high frequency base station may forward the information of the random access resource to the terminal through the target low frequency base station. Specifically, the target high frequency base station sends the information of the random access resource to the target low frequency base station. If the target low frequency base station establishes communication connection with the terminal, the target low frequency base station may send the information of the random access resource to the terminal through a physical downlink shared channel PDSCH or a physical downlink control channel PDCCH. If the target low frequency base station and the terminal do not establish a communication connection, the target low frequency base station may send a second Radio resource control RRC message to the terminal, where the second Radio resource control RRC message carries information of the random access resource, or send a broadcast message to the terminal, where the broadcast message carries information of the random access resource, for example, a Radio Network Temporary Identity (RNTI) is carried in the broadcast message. The broadcast message may be transmitted through a System Information Block (SIB) or a Master Information Block (MIB).

S106, the terminal sends a random access request to the target high-frequency base station by using the random access resource.

Correspondingly, the target high-frequency base station receives the random access request from the terminal.

Specifically, after acquiring the information of the random access resource, the terminal may find a corresponding frequency domain resource and/or time domain resource according to the information of the random access resource, and send a random access request to the target high frequency base station through the frequency domain resource and/or time domain resource. After receiving the Random Access request, the target high frequency base station sends a Random Access Response (RAR) message to the terminal. If a random access mode based on non-competition is adopted, the terminal and the target high-frequency base station establish communication connection at the moment. If the random access mode based on competition is adopted, after receiving the random access response message, the terminal sends msg3 message to the target high-frequency base station, and then the target high-frequency base station sends a competition resolving message to the terminal, and at this time, the terminal and the target high-frequency base station establish communication connection.

In the embodiment of the invention, a target high-frequency base station sends one or more beam reference signals to a terminal, then the terminal sends signal quality information of part or all of the beam reference signals in the one or more beam reference signals to the target low-frequency base station, the target low-frequency base station sends the signal quality information of part or all of the beam reference signals in the one or more beam reference signals to the target high-frequency base station, the target high-frequency base station selects a target beam according to the received signal quality information and sends information of random access resources corresponding to the target beam to the terminal, finally the terminal sends a random access request to the target high-frequency base station by using the random access resources, the target high-frequency base station selects the target beam and allocates corresponding random access resources by using the signal quality information, and the terminal directly sends the random access request by using the random access resources, and a plurality of possible random access resources are not required to be reserved by the target high-frequency base station for the selection of the terminal, so that the resource utilization rate is improved.

Referring to fig. 4, fig. 4 is a flowchart illustrating another random access method according to an embodiment of the present invention. As shown in fig. 4, the random access method includes steps S201 to S204.

S201, the terminal receives one or more beam reference signals from a target high-frequency base station.

Specifically, in the embodiment of the present invention, one high-frequency base station may send one or more beam reference signals in different directions in a time division manner, please refer to corresponding explanations of step S101 in the corresponding embodiment of fig. 3, which are not described herein again. The terminal may select a target high frequency base station by detecting received signal qualities, such as signal strengths, of all beam reference signals transmitted by the plurality of high frequency base stations.

For example, the terminal may determine the target high frequency base station according to the signal strength of each beam reference signal and a preset rule. The preset rule may be to sort the signal strengths of the beam reference signals in order from large to small, and select one or the first several beam reference signals with the best signal strength, or may be to select all or part of the beam reference signals whose signal strengths meet the requirement of a preset threshold range from the beam reference signals sent by each high-frequency base station. After selecting the beam reference signal meeting the preset rule according to the signal strength, the terminal may select one high-frequency base station from one or more high-frequency base stations corresponding to the selected beam reference signal to be a target high-frequency base station, and acquire signal quality information of the beam reference signal transmitted by the target high-frequency base station.

In the embodiment of the present invention, the signal quality information of the beam reference signal sent by the target high-frequency base station may be signal quality information corresponding to one or all beam reference signals sent by the target high-frequency base station selected by the terminal from the beam reference signals meeting the preset rule. For example, as shown in fig. 2, if the target high frequency base station is the high frequency base station 2, and one or all of the beam reference signals transmitted by the high frequency base station 2 are b and c, then the signal quality information of c with the best signal quality may be selected and transmitted to the target high frequency base station, or the signal quality information of b and c may be selected and transmitted to the target high frequency base station.

S202, the terminal sends signal quality information of part or all of the beam reference signals in the one or more beam reference signals to the target high-frequency base station through the target low-frequency base station.

Specifically, the terminal sends the signal quality information of some or all of the beam reference signals in the one or more beam reference signals to the target high-frequency base station through the target low-frequency base station, and the target high-frequency base station allocates the random access resource to the terminal according to the received signal quality information of the beam reference signals. For a specific determination method of the target low frequency base station and a specific process of the terminal sending the signal quality information to the target high frequency base station through the target low frequency base station, please refer to corresponding explanations of steps S102 to S103 in the embodiment corresponding to fig. 3, which are not described herein again.

S203, the terminal receives the information of the random access resource corresponding to the target wave beam from the target high-frequency base station.

Specifically, the terminal receives, from the target high-frequency base station, information of a random access resource corresponding to a target beam, where the target beam is obtained based on the signal quality information. In this embodiment of the present invention, the target high-frequency base station may select the target beam according to the signal quality information, and the selection rule may be defined based on a communication standard or configured on the target high-frequency base station, for a specific explanation, refer to step S104 in the corresponding embodiment of fig. 3, which is not described herein again.

Optionally, the target high-frequency base station may send the information of the random access resource to the terminal through a physical downlink control channel PDCCH or a physical downlink shared channel PDSCH, or send a broadcast message to the terminal, where the broadcast message carries the information of the random access resource. And the terminal receives the information of the random access resource corresponding to the target wave beam from the target high-frequency base station.

Optionally, the target high frequency base station may send the information of the random access resource to the terminal through the target low frequency base station. For a detailed explanation, please refer to the detailed description in step S105 of the corresponding embodiment in fig. 3, which is not repeated herein.

S204, the terminal sends a random access request to the target high-frequency base station by using the random access resource.

In the embodiment of the present invention, please refer to the detailed description in step S106 of the corresponding embodiment in fig. 3 for a detailed explanation of step S204, which is not repeated herein.

In the embodiment of the invention, a terminal receives one or more beam reference signals from a target high-frequency base station, then sends signal quality information of part or all of the beam reference signals in the one or more beam reference signals to the target high-frequency base station through a target low-frequency base station, receives information of random access resources corresponding to a target beam from the target high-frequency base station, finally sends a random access request to the target high-frequency base station by using the random access resources, distributes the random access resources for the terminal according to the signal quality information through the high-frequency base station, does not need to reserve a plurality of possible random access resources, and improves the resource utilization rate.

Referring to fig. 5, fig. 5 is a flowchart illustrating another random access method according to an embodiment of the present invention. As shown in fig. 5, the another random access method includes steps S301 to S308.

S301, the terminal receives one or more beam reference signals from the target high-frequency base station.

Specifically, in the embodiment of the present invention, for the specific explanation of step S301, refer to the corresponding explanation of step S201 shown in fig. 4, which is not repeated herein.

S302, the terminal determines a target high-frequency base station according to the beam reference signals sent by the high-frequency base stations and acquires the signal quality information of the beam reference signals sent by the target high-frequency base station.

Specifically, the terminal determines a target high-frequency base station according to the beam reference signals sent by each high-frequency base station, and acquires signal quality information of part or all of the beam reference signals sent by the target high-frequency base station. The terminal receives 1 or more beam reference signals transmitted by each high frequency base station and detects signal quality information of the received beam reference signals. Taking the signal strength as an example, the terminal may determine the target high-frequency base station according to the detected signal strength, and further obtain the signal quality information of the beam reference signal sent by the target high-frequency base station.

Optionally, the terminal arranges the signal strengths of the 1 or more beam reference signals sent by each high-frequency base station in an order from large to small to obtain the first N beam reference signals, where N is a natural number greater than or equal to 1; the terminal selects one high-frequency base station as a target high-frequency base station from all high-frequency base stations which send the previous N wave beam reference signals; and the terminal acquires the signal quality information of the beam reference signal sent by the target high-frequency base station according to the beam reference signal sent by the target high-frequency base station in the first N beam reference signals. For specific examples, see detailed description in step S101 of the corresponding embodiment in fig. 3, which is not repeated herein.

Optionally, the terminal selects all beam reference signals of which the signal intensity meets a preset threshold range from the beam reference signals sent by each high-frequency base station; the terminal selects one high-frequency base station as a target high-frequency base station from all high-frequency base stations which send all beam reference signals with the signal intensity meeting the preset threshold range; and the terminal acquires the signal quality information of the beam reference signal sent by the target high-frequency base station from all the beam reference signals with the signal intensity meeting the preset threshold range and the beam reference signal sent by the target high-frequency base station. For specific examples, see detailed description in step S101 of the corresponding embodiment in fig. 3, which is not repeated herein.

S303, the terminal acquires base station matching information broadcasted by at least one low-frequency base station.

Specifically, in the embodiment of the present invention, the target low frequency base station may be determined by a terminal, and the terminal acquires a correspondence between the target high frequency base station and the target low frequency base station, and then selects the target low frequency base station according to the correspondence. The terminal acquires base station matching information broadcasted by at least one low-frequency base station. In the embodiment of the present invention, the base station matching information includes at least one high frequency base station corresponding to each low frequency base station. The low frequency base station can periodically broadcast the base station matching information, and the terminal acquires the base station matching information broadcast by at least one low frequency base station. As shown in fig. 2, the base station matching information transmitted by the low frequency base station 1 may be one or more high frequency base stations corresponding to the low frequency base station 1, such as the high frequency base station 1 and the high frequency base station 2.

S304, the terminal selects a low-frequency base station corresponding to the target high-frequency base station as a target low-frequency base station according to the base station matching information broadcasted by the at least one low-frequency base station.

Specifically, the terminal selects one low-frequency base station corresponding to the target high-frequency base station as a target low-frequency base station according to the base station matching information broadcasted by the at least one low-frequency base station. In the embodiment of the present invention, as shown in fig. 2, for example, the high frequency base station corresponding to the low frequency base station 1 is the high frequency base station 1 and the high frequency base station 2, the high frequency base station corresponding to the low frequency base station 2 is the high frequency base station 3, and the high frequency base station corresponding to the low frequency base station 3 is the high frequency base station 3. If the target high-frequency base station is the high-frequency base station 1, the terminal selects the low-frequency base station 1 as the target low-frequency base station; if the target high frequency base station is the high frequency base station 3, the terminal may select one of the low frequency base stations from the low frequency base station 2 and the low frequency base station 3 as the target low frequency base station.

S305, the terminal judges whether the terminal establishes communication connection with a target low-frequency base station.

S306, if the terminal and the target low-frequency base station establish communication connection, the terminal sends an access resource request to the target low-frequency base station through a PUSCH or PUCCH, so that the target low-frequency base station sends the access resource request to the target high-frequency base station.

Specifically, in the embodiment of the present invention, the access resource request carries the signal quality information, and the signal quality information is used by the target high frequency base station to allocate a random access resource to the terminal. If the terminal and the target low-frequency base station establish communication connection, the terminal sends an access resource request to the target low-frequency base station through a PUSCH or PUCCH, and the target low-frequency base station forwards the access resource request to the target high-frequency base station. The target high-frequency base station obtains the signal quality information in the access resource request, and may allocate a random access resource to the terminal, where the specific process may be: and the target high-frequency base station selects a beam reference signal corresponding to the signal quality information of one beam reference signal from the signal quality as a target beam, and then allocates random access resources to the terminal according to the target beam. For example, the signal quality includes quality information of the beam reference signal a, quality information of the beam reference signal b, and quality information of the beam reference signal c, and the target high-frequency base station may select the beam reference signal a corresponding to the quality information of the beam reference signal a as a target beam, and then allocate a random access resource to the terminal according to the target beam.

S307, if the terminal does not establish communication connection with the target low-frequency base station, the terminal sends msg3 message or RRC message carrying the signal quality information to the target low-frequency base station, so that the target low-frequency base station sends the signal quality information to the target high-frequency base station.

Specifically, if the terminal does not establish a communication connection with a target low-frequency base station, the terminal sends the signal quality information to the target low-frequency base station through msg3 message or RRC message, the target low-frequency base station sends the signal quality information to the target high-frequency base station, and the target high-frequency base station allocates a random access resource to the terminal according to the signal quality information.

S308, the terminal acquires the random access resource distributed by the target high-frequency base station and sends a random access request to the target high-frequency base station by using the random access resource.

Specifically, the terminal obtains a random access resource allocated by the target high-frequency base station, and sends a random access request to the target high-frequency base station by using the random access resource. The random access resource may be one or more of a time domain resource, a frequency domain resource, and a space dimension resource (such as which beam resource).

Optionally, the target high frequency base station may forward the information of the random access resource to the terminal through the target low frequency base station. Specifically, the target high frequency base station sends the information of the random access resource to the target low frequency base station. Two cases are included here: first, if the target low frequency base station establishes a communication connection with the terminal, the terminal may receive information of the random access resource sent by the target low frequency base station through a PDCCH, or the terminal may receive information of the random access resource sent by the target low frequency base station through a PDSCH; second, if the target low frequency base station and the terminal do not establish a communication connection, the target low frequency base station may send a second RRC message to the terminal, where the second RRC message carries the information of the random access resource, or send a broadcast message to the terminal, where the broadcast message carries the information of the random access resource, such as an RNTI is carried in the broadcast message. Wherein, the broadcast message can be transmitted through SIB or MIB.

Optionally, the terminal may receive information of the random access resource sent by the target high frequency base station through the PDCCH or the PDSCH.

Optionally, the terminal may send a broadcast message to the terminal, where the broadcast message carries information of the random access resource, such as RNTI in the broadcast message. Wherein, the broadcast message can be transmitted through SIB or MIB.

The terminal may receive the access resource message transmitted by any one of the target high frequency base station and the target low frequency base station, and whether to select the target high frequency base station or the target low frequency base station may be selected according to a preset rule, for example, if a target high frequency base station priority rule is set, the target high frequency base station may preferentially transmit the access resource message.

In the embodiment of the invention, a terminal receives one or more beam reference signals from a target high-frequency base station, then determines the target high-frequency base station according to the beam reference signals sent by each high-frequency base station, and acquires signal quality information of the beam reference signals sent by the target high-frequency base station, the terminal selects one low-frequency base station corresponding to the target high-frequency base station as a target low-frequency base station by acquiring base station matching information broadcast by at least one low-frequency base station, selects to send an access resource request to the target low-frequency base station through a PUSCH or PUCCH or sends an msg3 message or an RRC message carrying the signal quality information to the target low-frequency base station by judging whether the terminal is in communication connection with the target low-frequency base station, so that the target low-frequency base station sends the access resource request or the signal quality information to the target high-, after the terminal acquires the random access resource distributed by the target high-frequency base station, the random access resource is used for sending a random access request to the target high-frequency base station.

Referring to fig. 6, fig. 6 is a diagram illustrating a terminal according to an embodiment of the present invention. Please refer to fig. 6. Fig. 6 is a schematic structural diagram of a terminal 1000 according to an embodiment of the present invention. As shown in fig. 6, the terminal may include at least one processor 1001, such as a CPU, at least one transceiver 1002, memory 1003, at least one communication bus 1004. A communication bus 1004 is used to enable connective communication between these components. The transceiver 1002 may be used for transmitting and receiving information, and the memory 1003 may include a high-speed RAM memory, and may further include a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory 1003 may optionally include at least one storage device located remotely from the processor 1001. Optionally, the memory 1003 may also be internal to the processor 1001. Programs stored in the optional memory 1003 may also be burned into the processor 1001.

Specifically, the processor 1001 calls a program stored in the memory 1003, and performs the following operations:

receiving, by transceiver 1002, one or more beam-reference signals from a target high-frequency base station;

transmitting, by the transceiver 1002, signal quality information of some or all of the one or more beam-reference signals to a target high-frequency base station by using the target low-frequency base station;

receiving, by the transceiver 1002, information of a random access resource corresponding to a target beam obtained based on the signal quality information from the target high frequency base station;

sending a random access request to the target high frequency base station using the random access resource through the transceiver 1002.

In a possible embodiment, the signal quality of the partial or all beam reference signals satisfies a quality condition.

In one possible embodiment, the quality condition is signal strength top N, where N is a natural number greater than or equal to 1.

In one possible embodiment, the quality condition is that the signal strength satisfies a threshold range.

In a possible implementation, the processor 1001 calls a program stored in the memory 1003, and specifically executes:

transmitting, by the transceiver 1002, the signal quality information to the target low frequency base station by using a physical uplink shared channel, PUSCH, so that the target low frequency base station transmits the signal quality information to the target high frequency base station; or the like, or, alternatively,

transmitting, by the transceiver 1002, the signal quality information to the target low frequency base station by using a physical uplink control channel, PUCCH, so that the target low frequency base station transmits the signal quality information to the target high frequency base station; or the like, or, alternatively,

sending, by transceiver 1002, a message 3msg3 message carrying the signal quality information to the target low frequency base station, so that the target low frequency base station sends the signal quality information to the target high frequency base station; or the like, or, alternatively,

transmitting, by the transceiver 1002, a first radio resource control RRC message carrying the signal quality information to the target low frequency base station, so that the target low frequency base station transmits the signal quality information to the target high frequency base station.

In one possible implementation, the processor 1001 calls a program stored in the memory 1003, and further performs:

acquiring a corresponding relation between the target high-frequency base station and the target low-frequency base station;

and selecting the target low-frequency base station according to the corresponding relation.

receiving information of the random access resource from the target high frequency base station by using a Physical Downlink Control Channel (PDCCH) through a transceiver 1002; or the like, or, alternatively,

receiving, by the transceiver 1002, information of the random access resource from the target high frequency base station using a physical downlink shared channel PDSCH; or the like, or, alternatively,

receiving a broadcast message by the target high frequency base station through a transceiver 1002, where the broadcast message carries information of the random access resource; or the like, or, alternatively,

receiving, by the transceiver 1002, information of the random access resource from the target low frequency base station by using a physical downlink shared channel PDSCH, the information of the random access resource being received by the target low frequency base station from the target high frequency base station; or the like, or, alternatively,

receiving, by the transceiver 1002, information of the random access resource from the target low frequency base station by using a physical downlink control channel PDCCH, the information of the random access resource being received by the target low frequency base station from the target high frequency base station; or the like, or, alternatively,

receiving, by the transceiver 1002, a second radio resource control RRC message from the target low frequency base station, where the second RRC message carries information of the random access resource, where the information of the random access resource is received by the target low frequency base station from the target high frequency base station; or the like, or, alternatively,

receiving a broadcast message from the target low frequency base station through the transceiver 1002, the broadcast message carrying information of the random access resource.

The terminal shown in the embodiment of the present invention is configured to execute actions or steps of the terminal in any embodiment shown in fig. 6, and for technical effects brought by the terminal, reference is made to the detailed description of the corresponding method embodiment, which is not described herein again.

Referring to fig. 7, fig. 7 is a high frequency base station according to an embodiment of the present invention. Referring to fig. 7, fig. 7 is a schematic structural diagram of a high frequency base station 2000 according to an embodiment of the present invention. As shown in fig. 7, the high frequency base station may include at least one processor 2001, such as a CPU, at least one transceiver 2002, a memory 2003, at least one communication bus 2004. A communication bus 2004 is used to enable connective communication between these components. The transceiver 2002 may be used for sending and receiving information data, and the memory 2003 may include a high-speed RAM memory, and may further include a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory 2003 may optionally include at least one memory device located remotely from the aforementioned processor 2001. Optionally, the memory 2003 may also be internal to the processor 2001. Programs stored in the optional memory 2003 may also be burned into the processor 2001.

Specifically, the processor 2001 is configured to call a program stored in the memory 2003, and perform the following operations:

transmitting, by the transceiver 2002, one or more beam-reference signals to the terminal;

receiving, by the transceiver 2002, signal quality information of some or all of the one or more beam-reference signals from the terminal;

selecting a target beam according to the signal quality information;

and sending information of the random access resource corresponding to the target beam to the terminal through the transceiver 2002.

In a possible implementation, the processor 2001 calls a program stored in the memory 2003 to specifically perform:

transmitting information of a random access resource corresponding to the target beam to the user equipment through a transceiver 2002 by using a Physical Downlink Control Channel (PDCCH); or the like, or, alternatively,

transmitting information of a random access resource corresponding to the target beam to the user terminal by using a Physical Downlink Shared Channel (PDSCH) through a transceiver 2002; or the like, or, alternatively,

a broadcast message is sent via the transceiver 2002, the broadcast message carrying information of the random access resource.

The high-frequency base station shown in the embodiment of the present invention is configured to execute actions or steps of the high-frequency base station in any embodiment shown in fig. 7, and for technical effects brought by the high-frequency base station, reference is made to the detailed description of the corresponding method embodiment, which is not described herein again.

Referring to fig. 8, fig. 8 is a diagram illustrating a low frequency base station according to an embodiment of the present invention. Referring to fig. 8, fig. 8 is a schematic structural diagram of a low frequency base station 3000 according to an embodiment of the present invention. As shown in fig. 8, the low frequency base station 3000 may include at least one processor 3001, e.g., a CPU, at least one transceiver 3002, memory 3003, and at least one communication bus 3004. The communication bus 3004 is used to enable connection communication between these components. The transceiver 3002 may be used for transmitting and receiving information data, and the memory 3003 may include a high-speed RAM memory, and may further include a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory 3003 may optionally include at least one memory device located remotely from the processor 3001. Optionally, the memory 3003 may also be embedded in the processor 3001. The program stored in the optional memory 3003 may also be burned in the processor 3001.

Specifically, the processor 3001 is configured to call a program stored in the memory 3003, and perform the following operations:

receiving, by the transceiver 3002, signal quality information of some or all of the one or more beam-reference signals from the terminal;

the signal quality information is transmitted to the target high frequency base station through the transceiver 3002.

In a possible implementation, the processor 3001 is configured to call a program stored in the memory 3003, and specifically perform:

receiving, by the transceiver 3002, signal quality information of some or all of the beam-reference signals from the terminal using a physical uplink shared channel, PUSCH; or the like, or, alternatively,

receiving, by the transceiver 3002, signal quality information of some or all of the beam reference signals from the terminal using a physical uplink control channel PUCCH; or the like, or, alternatively,

receiving a message 3msg3 message from a terminal through the transceiver 3002, the message 3msg3 message carrying signal quality information for some or all of one or more beam-reference signals; or the like, or, alternatively,

a first radio resource control, RRC, message is received from the terminal via the transceiver 3002, the first RRC message carrying signal quality information for some or all of the one or more beam-reference signals.

In one possible implementation, the processor 3001 is configured to call a program stored in the memory 3003, and further performs:

receiving, by the transceiver 3002, information of a random access resource corresponding to a target beam obtained based on the signal quality information from the high frequency base station;

the information of the random access resource is transmitted to the terminal through the transceiver 3002.

transmitting information of the random access resource to a terminal by using a Physical Downlink Shared Channel (PDSCH) through a transceiver 3002; or the like, or, alternatively,

transmitting information of the random access resource to a terminal by using a Physical Downlink Control Channel (PDCCH) through a transceiver 3002; or the like, or, alternatively,

transmitting a second Radio Resource Control (RRC) message to the terminal through the transceiver 3002, wherein the second RRC message carries the information of the random access resource; or the like, or, alternatively,

and sending a broadcast message to the terminal through the transceiver 3002, wherein the broadcast message carries the information of the random access resource.

The low frequency base station shown in the embodiment of the present invention is configured to execute actions or steps of the low frequency base station in any embodiment shown in fig. 8, and for technical effects brought by the low frequency base station, reference is made to the detailed description of the corresponding method embodiment, which is not described herein again.

An embodiment of the present invention further provides a communication system, including the high-frequency base station provided in the corresponding embodiment of fig. 7 and the low-frequency base station provided in the corresponding embodiment of fig. 8.

The units in the device of the embodiment of the invention can be merged, divided and deleted according to actual needs. Those skilled in the art may combine or combine features of different embodiments and features of different embodiments described in this specification.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A random access method, the method comprising:

2. The method according to claim 1, wherein the signal quality of the partial or all beam reference signals satisfies a quality condition.

3. The method of claim 2, wherein the quality condition is a signal strength top-ranked N, wherein N is a natural number greater than or equal to 1.

4. The method of claim 2, wherein the quality condition is that signal strength meets a threshold range.

5. The method according to any one of claims 1 to 4, wherein the terminal sends, to the target high frequency base station through the target low frequency base station, signal quality information of some or all of the one or more beam reference signals, including:

6. The method of any one of claims 1-5, further comprising:

7. The method according to any of claims 1-6, wherein the terminal receives information of the random access resource corresponding to the target beam from the target high frequency base station, and comprises:

8. A random access method, the method comprising:

the target high-frequency base station receives signal quality information of part or all of the beam reference signals in the one or more beam reference signals from the terminal through the target low-frequency base station;

the target high-frequency base station selects a target wave beam according to the signal quality information; and the target high-frequency base station sends information of random access resources corresponding to the target wave beam to the terminal, and the random access resources are used by the terminal for sending a random access request to the target high-frequency base station.

9. The method of claim 8, wherein the transmitting, by the target high frequency base station, the information of the random access resource corresponding to the target beam to the terminal comprises:

the target high-frequency base station sends information of random access resources corresponding to the target wave beam to the terminal through a Physical Downlink Control Channel (PDCCH); or the like, or, alternatively,

the target high-frequency base station sends information of random access resources corresponding to the target wave beam to the terminal through a Physical Downlink Shared Channel (PDSCH); or the like, or, alternatively,

10. A random access method, the method comprising:

11. The method of claim 10, wherein the target low frequency base station receives signal quality information of some or all of the one or more beam reference signals from a terminal, and comprises:

12. The method of claim 10 or 11, wherein after the target low frequency base station transmits the signal quality information to the target high frequency base station, the method further comprises:

13. The method of claim 12, wherein the target low frequency base station sends the information of the random access resource to a terminal, and the method comprises:

14. A terminal, characterized in that the terminal comprises a transceiver and a processor; the processor is configured to:

15. The terminal of claim 14, wherein the signal quality of some or all of the beam-reference signals satisfies a quality condition.

16. The terminal of claim 15, wherein the quality condition is signal strength top N, where N is a natural number greater than or equal to 1.

17. The terminal of claim 15, wherein the quality condition is that signal strength meets a threshold range.

18. The terminal according to any of claims 14-17, wherein the processor is specifically configured to:

transmitting, by the transceiver, the signal quality information to the target low frequency base station using a Physical Uplink Shared Channel (PUSCH) so that the target low frequency base station transmits the signal quality information to the target high frequency base station; or the like, or, alternatively,

transmitting, by the transceiver, the signal quality information to the target low frequency base station using a Physical Uplink Control Channel (PUCCH) so that the target low frequency base station transmits the signal quality information to the target high frequency base station; or the like, or, alternatively,

sending, by the transceiver, a message 3msg3 message carrying the signal quality information to the target low frequency base station, so that the target low frequency base station sends the signal quality information to the target high frequency base station; or the like, or, alternatively,

and transmitting a first Radio Resource Control (RRC) message carrying the signal quality information to the target low-frequency base station through the transceiver, so that the target low-frequency base station transmits the signal quality information to the target high-frequency base station.

19. The terminal of any of claims 14-18, wherein the processor is further configured to:

20. The terminal according to any of claims 14-19, wherein the processor is specifically configured to:

receiving, by the transceiver, information of the random access resource from the target high frequency base station using a Physical Downlink Control Channel (PDCCH); or the like, or, alternatively,

receiving, by the transceiver, information of the random access resource from the target high frequency base station using a Physical Downlink Shared Channel (PDSCH); or the like, or, alternatively,

receiving a broadcast message by the target high-frequency base station through the transceiver, wherein the broadcast message carries the information of the random access resource; or the like, or, alternatively,

receiving, by the transceiver, information of the random access resource from the target low frequency base station using a Physical Downlink Shared Channel (PDSCH), the information of the random access resource being received by the target low frequency base station from the target high frequency base station; or the like, or, alternatively,

receiving, by the transceiver, information of the random access resource from the target low frequency base station using a Physical Downlink Control Channel (PDCCH), the information of the random access resource being received by the target low frequency base station from the target high frequency base station; or the like, or, alternatively,

receiving, by the transceiver, a second Radio Resource Control (RRC) message from the target low frequency base station, the second RRC message carrying information of the random access resource, the information of the random access resource being received by the target low frequency base station from the target high frequency base station; or the like, or, alternatively,

and receiving a broadcast message from the target low-frequency base station through the transceiver, wherein the broadcast message carries the information of the random access resource.

21. A high frequency base station, comprising a transceiver and a processor, the processor configured to:

receiving, by the transceiver, signal quality information of some or all of the one or more beam-reference signals from the terminal through a target low frequency base station;

selecting a target beam according to the signal quality information;

and sending information of random access resources corresponding to the target wave beam to the terminal through the transceiver, wherein the random access resources are used by the terminal for sending a random access request to the high-frequency base station.

22. The high frequency base station of claim 21, wherein the processor is specifically configured to:

sending information of random access resources corresponding to the target wave beam to the terminal by using a Physical Downlink Control Channel (PDCCH) through the transceiver; or the like, or, alternatively,

sending information of random access resources corresponding to the target wave beam to the terminal by using a Physical Downlink Shared Channel (PDSCH) through the transceiver; or the like, or, alternatively,

and sending a broadcast message through the transceiver, wherein the broadcast message carries the information of the random access resource.

23. A low frequency base station, comprising a transceiver and a processor, wherein the processor is configured to:

24. The low frequency base station of claim 23, wherein the processor is specifically configured to:

receiving signal quality information of part or all of one or more beam reference signals from a terminal by using a Physical Uplink Shared Channel (PUSCH) through the transceiver; or the like, or, alternatively,

receiving, by the transceiver, signal quality information of part or all of beam reference signals in one or more beam reference signals from a terminal using a Physical Uplink Control Channel (PUCCH); or the like, or, alternatively,

receiving, by the transceiver, a message 3msg3 message from a terminal, the message 3msg3 message carrying signal quality information for some or all of one or more beam-reference signals; or the like, or, alternatively,

receiving, by the transceiver, a first Radio Resource Control (RRC) message from a terminal, the first RRC message carrying signal quality information of some or all of one or more beam reference signals.

25. The low frequency base station of claim 23 or 24, wherein the processor is further configured to:

receiving, by the transceiver, information of a random access resource corresponding to a target beam from a high frequency base station, the target beam being obtained based on the signal quality information;

and sending the information of the random access resource to a terminal through the transceiver.

26. The low frequency base station of claim 25, wherein the processor is specifically configured to:

transmitting information of the random access resource to a terminal by using a Physical Downlink Shared Channel (PDSCH) through the transceiver; or the like, or, alternatively,

transmitting information of the random access resource to a terminal by using a Physical Downlink Control Channel (PDCCH) through the transceiver; or the like, or, alternatively,

sending a second Radio Resource Control (RRC) message to the terminal through the transceiver, wherein the second RRC message carries the information of the random access resource; or the like, or, alternatively,

and sending a broadcast message to a terminal through the transceiver, wherein the broadcast message carries the information of the random access resource.

27. A computer-readable storage medium, characterized in that it stores a computer program which, when executed by hardware, is capable of implementing the method of any one of claims 1 to 13.