CN114095979A

CN114095979A - Method, device and related equipment for establishing communication connection

Info

Publication number: CN114095979A
Application number: CN202010858421.3A
Authority: CN
Inventors: 晋英豪; 郝金平
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2022-02-25
Also published as: WO2022041932A1

Abstract

The embodiment of the application discloses a method for establishing communication connection, which can be applied to the field of communication. The method comprises the following steps: a terminal receives a first message sent by first equipment, wherein the first message comprises information of uplink resources of second equipment; and the terminal sends a second message to the second equipment through the uplink resource of the second equipment. And the terminal receives a third message sent by the first equipment, wherein the third message comprises information of downlink resources of the second equipment, and the downlink resources of the second equipment are used for establishing a first downlink communication connection with the second equipment by the terminal according to the downlink resources of the second equipment. The terminal establishes downlink communication connection with the second equipment through the first equipment. Therefore, the broadcasting resource of the second device can be saved, and even the common channel broadcasting of the second device is closed, so that the energy consumption of the second device is reduced.

Description

Method, device and related equipment for establishing communication connection

Technical Field

The present application relates to the field of communications, and in particular, to a method, an apparatus, and a related device for establishing a communication connection.

Background

The percentage of the electricity charges is about 15.88% of the operating cost of the communication carrier. Among the energy consumption of the stations, the energy consumption of a Radio Frequency (RF) module accounts for 80% -90% of the energy consumption of the whole access network equipment. Therefore, reducing the power consumption of the RF module becomes a key to reduce the electricity charges.

Currently, a typical way to reduce the energy consumption of the radio frequency module is symbol turn-off, where symbol turn-off means that when the access network device does not transmit data in part of symbols, the access network device turns off a power amplifier (power amplifier) in these "no data transmission" symbol periods, so as to reduce the system power consumption. When the access network equipment detects a symbol without data in a time domain, the power supply of the amplifier and related hardware is turned off, and the static power consumption of the hardware is reduced. For example, when the access network device is busy, the PA of the access network device needs to be always on. However, when no data is transmitted, the PA can be turned off briefly from the energy saving perspective, thereby achieving the purpose of saving energy. The power saving benefit of symbol turn off depends on the turn off duration of the amplifier and associated hardware, i.e., the ratio of symbols without data to all symbols.

Although the use of symbol turn-off can reduce the power consumption of the RF module, how to further reduce the power consumption is a constant consideration in the field of communications.

Disclosure of Invention

The application provides a method, a device and related equipment for establishing communication connection, which aim to reduce energy consumption.

A first aspect of the present application provides a method of establishing a communication connection.

The method comprises the following steps: and after the terminal finishes the cell search, the terminal performs downlink frame synchronization and cell residence with the first equipment. After the steps are completed, the terminal receives a first message sent by first equipment, wherein the first message comprises information of uplink resources of second equipment; and the terminal sends a second message to the second equipment through the uplink resource of the second equipment. And the terminal receives a third message sent by the first equipment, wherein the third message comprises information of downlink resources of the second equipment, and the downlink resources of the second equipment are used for establishing a first downlink communication connection with the second equipment by the terminal according to the downlink resources of the second equipment. The terminal establishes downlink communication connection with the second equipment through the first equipment. Therefore, the broadcasting resource of the second device can be saved, and even the common channel broadcasting of the second device is closed, so that the energy consumption of the second device is reduced. And the first message is sent through the downlink resource of the first device, and the second message is received through the uplink resource of the second device, so that uplink and downlink decoupling is realized. Under the condition of uplink and downlink decoupling, the second device may receive the second message of the terminal, and compared with the case that the terminal interacts with the first device only, the second device may ensure that the terminal establishes the first downlink communication connection with the second device within the signal coverage of the second device.

In an optional design of the first aspect, the second message is a Radio Resource Control (RRC) setup request message. The first downlink communication connection between the terminal and the second device is established in the random access, so that the time delay of the terminal accessing the second device can be reduced.

In an optional design of the first aspect, the first message further includes a Reference Signal Receiving Power (RSRP) threshold and information of an uplink resource of the first device, where the uplink resource of the second device is used by the terminal to establish a first uplink communication connection with the second device according to the uplink resource of the second device, and the uplink resource of the first device is used by the terminal to establish a second uplink communication connection with the first device according to the uplink resource of the first device; the method further comprises the following steps: if the RSRP between the terminal and the first equipment is greater than the RSRP threshold, the terminal sends data, signaling or random access signals to the second equipment through the first uplink communication connection; or, if the RSRP of the terminal and the first device is less than the RSRP threshold, the terminal sends data, signaling or a random access signal to the first device through the second uplink communication connection; or, if the RSRP of the terminal and the first device is equal to the RSRP threshold, the terminal sends data, signaling, or a random access signal through the first uplink communication connection or the second uplink communication connection. The terminal resides in a cell where the first device is located, the second uplink communication connection is an Uplink (UL) of the terminal, and the first uplink communication connection is an SUL of the terminal. In a related Supplementary Uplink (SUL) technology, if RSRP of a terminal and a first device is greater than an RSRP threshold, the terminal may select uplink UL transmission data. If the RSRP of the terminal and the first device is less than the RSRP threshold, the terminal selects the SUL to transmit data. The method and the device can still enable the terminal to select the proper uplink communication connection under the condition that the second equipment reduces or does not carry out the common channel broadcast.

In an alternative design of the first aspect, the first message further includes a first Physical Cell Identity (PCI) and a second PCI. The method further comprises the following steps: the terminal receives a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) sent by second equipment, wherein the first PSS and the SSS correspond to a first PCI; the terminal receives a second PSS and a second SSS which are sent by third equipment and correspond to a second PCI; and if the first PCI strength is greater than the second PCI strength, the terminal sends a second message to the second equipment through the uplink resource of the second equipment, wherein the first PCI strength is the signal strength of the first PSS and the SSS, and the second PCI strength is the signal strength of the second PSS and the SSS. If there are multiple devices, except the first device, within the signal coverage of the first device, which can provide downlink service for the terminal, it is desirable to select a device with a stronger signal to provide downlink service for the terminal. The PSS and the SSS sent by the second equipment and the third equipment are measured to determine which equipment has stronger signals, so that the second information is sent to the second equipment with stronger signal strength, and the downlink communication quality of the terminal is improved.

In an optional design of the first aspect, the first message further includes measurement information, where the measurement information is used to instruct the terminal to obtain a trigger event of the first PCI strength and/or the second PCI strength, the first PCI strength is a downlink signal strength of a cell corresponding to the first PCI, and the second PCI strength is a downlink signal strength of a cell corresponding to the second PCI. For example, the trigger event is a measurement event, where the measurement event indicates how long after the terminal receives the SSB or SIB1 message, the terminal starts and/or ends to measure the first PSS and the SSS sent by the second device, or specifies that the terminal needs to measure the signal strength of the cell corresponding to the frequency band of the second device as long as the terminal resides in the cell2, and obtains the first PCI strength and/or the second PCI strength, or specifies that the terminal needs to measure the signal of the cell of the second device and/or the third device when the downlink RSRP signal strength of the cell2 measured by the terminal is higher than a certain threshold. By informing the terminal under what conditions to receive the first PSS and SSS, the first aspect may ensure that the terminal may receive the first PSS and SSS under the conditions, and the second aspect may allow the second device to transmit the first PSS and SSS under the conditions, thereby reducing the number of PSS and SSS transmitted by the second device, and thus reducing the energy consumption of the second device.

In an optional design of the first aspect, the third message or the first message further includes System Frame Number (SFN) information, and the SFN information is used for the terminal to perform downlink frame synchronization with the second device according to the SFN information. And the terminal cannot complete the downlink frame synchronization with the second equipment through the broadcast information of the second equipment under the condition that the second equipment does not perform the common channel broadcast. Through the SFN information in the first message, the terminal may complete downlink frame synchronization with the second device, thereby improving the success rate of data transmission. Further, the SFN information is a time offset of the first device and the second device. Because the terminal performs downlink frame synchronization with the first device, the terminal can realize downlink frame synchronization with the second device after acquiring the time offset between the first device and the second device.

In an alternative design of the first aspect, the first device is a low frequency base station or a low frequency antenna and the second device is a high frequency base station or a high frequency antenna. The low frequency and the high frequency are relative, and in the case that the center frequency of the spectrum resource used by the second base station is greater than the center frequency of the spectrum resource used by the first base station, the second device may be considered as a high frequency base station, and the first device may be considered as a low frequency base station. Under the same power, the signal coverage of the high-frequency base station is smaller than that of the low-frequency base station. Therefore, the number of high frequency base stations needs to be larger than the number of low frequency base stations. By reducing or turning off the common channel broadcast of the high frequency base stations, more energy consumption may be reduced than by turning off or reducing the common channel broadcast of the low frequency base stations.

In an optional design of the first aspect, the first message further includes a cell identifier of the second device and a cell identifier of the third device.

In an optional design of the first aspect, the third message further includes information of a downlink resource of the first device, where the downlink resource of the first device is used for the terminal to establish a second downlink communication connection with the first device according to the downlink resource of the first device, and the first downlink communication connection and the second downlink communication connection are used to transmit data to the terminal in a carrier aggregation CA manner. The first downlink communication connection and the second downlink communication connection transmit data to the terminal in a CA mode, so that the transmission efficiency of the downlink data of the terminal can be improved.

In an optional design of the first aspect, the first message further includes a tracking signal, and the tracking signal is used for performing fine downlink synchronization with the second device according to the tracking signal. The fine synchronization refers to precise synchronization, and may include precise time and frequency synchronization. And under the condition that the second equipment does not carry out common channel broadcasting, the terminal cannot finish the downlink fine synchronization with the second equipment through the broadcasting information of the second equipment. And the terminal can finish the downlink fine synchronization with the second equipment through the tracking signal in the first message, thereby improving the reliability of data transmission.

A second aspect of the present application provides a method of establishing a communication connection.

The method comprises the following steps:

and after the terminal finishes the cell search, the terminal performs downlink frame synchronization and cell residence with the first equipment. After the above steps are completed, the first device sends a first message to the terminal, where the first message includes information of an uplink resource of the second device, the uplink resource of the second device is used for the terminal to send a second message to the second device through the uplink resource of the second device, and the second message is used for obtaining a third message. And the first equipment sends a third message to the terminal, wherein the third message comprises the information of the downlink resource of the second equipment, and the downlink resource of the second equipment is used for establishing the first downlink communication connection with the second equipment by the terminal according to the downlink resource of the second equipment.

In an alternative design of the second aspect, the second message is an RRC setup request message. The first downlink communication connection between the terminal and the second device is established in the random access, so that the time delay of the terminal accessing the second device can be reduced.

In an optional design of the second aspect, the first message further includes a reference signal received power, RSRP, threshold and information of an uplink resource of the first device, the uplink resource of the second device is used for the terminal to establish a first uplink communication connection with the second device according to the uplink resource of the second device, the uplink resource of the first device is used for the terminal to establish a second uplink communication connection with the first device according to the uplink resource of the first device, the RSRP threshold is used for, if the RSRP of the terminal and the first device is greater than the RSRP threshold, the terminal sends data signaling or a random access signal to the second device over the first uplink communication connection, or is used for sending a data signaling or a random access signal to the first device through the second uplink communication connection if the RSRP between the terminal and the first device is less than the RSRP threshold, or the terminal is configured to send a data signaling or a random access signal through the first uplink communication connection or the second uplink communication connection if the target RSRP is equal to the RSRP threshold.

In an optional design of the second aspect, the first message further includes a first PCI and a second PCI; the method further comprises the following steps: the method comprises the steps that a first device sends a first primary synchronization signal PSS and an auxiliary synchronization signal SSS to a terminal, the first PSS and the SSS are used for the terminal to obtain first PCI strength, the first PSS and the SSS correspond to a first PCI, the first PCI strength is used for the terminal to send a second message to a second device through uplink resources if the first PCI strength is larger than a second PCI strength, the second PCI strength is obtained by the terminal according to a second PSS and the SSS sent by the second device, and the second PSS and the SSS correspond to a second PCI.

In an optional design of the second aspect, the first message further includes information of a downlink resource of the third device and information of a downlink resource of the second device, where the downlink resource of the second device is used for the terminal to receive, through the downlink resource of the second device, the first primary synchronization signal PSS and the secondary synchronization signal SSS sent by the second device; the downlink resource of the third device is used for the terminal to receive the second PSS and SSS sent by the third device through the downlink resource of the third device. If the terminal is not connected to the second device for the first time, the terminal may obtain the information of the downlink resource of the second device in the service of the second device to the terminal in the previous time. If the terminal is connected to the second device for the first time, the first message further includes information of downlink resources of the second device.

In an optional design of the second aspect, the first message further includes measurement information, and the measurement information is used to instruct the terminal to acquire a trigger event of the first PCI strength.

In an optional design of the second aspect, the third message or the first message further includes system frame number SFN information, and the SFN information is used for the terminal to perform downlink frame synchronization with the second device according to the SFN information.

In an alternative design of the second aspect, the first device is a low frequency base station or a low frequency antenna and the second device is a high frequency base station or a high frequency antenna.

In an optional design of the second aspect, the first message further includes a cell identification of the second device and a cell identification of the third device.

In an optional design of the second aspect, the first message further includes a tracking signal, and the tracking signal is used for performing fine downlink synchronization with the second device by the terminal according to the tracking signal.

In an optional design of the second aspect, the third message further includes information of a downlink resource of the first device, where the information of the downlink resource of the first device is used by the terminal to establish a second downlink communication connection with the first device according to the downlink resource of the first device, and the first downlink communication connection and the second downlink communication connection are used to transmit data to the terminal in a CA manner.

For a description of the advantageous effects of the second aspect of the present application, reference may be made to the description of the advantageous effects of the aforementioned first aspect.

A third aspect of the present application provides a method of establishing a communication connection.

The method comprises the following steps: the second device receives a second message sent by the terminal through an uplink resource of the second device, wherein the uplink resource of the second device is obtained by the terminal from the first message sent by the first device;

the method comprises the steps that a second device sends a confirmation message to a first device, wherein the confirmation message is used for enabling the first device to send a third message to a terminal, the third message comprises information of downlink resources of the second device, and the downlink resources of the second device are used for enabling the terminal to establish first downlink communication connection with the second device according to the downlink resources of the second device.

In an optional design of the third aspect, the second message is an RRC setup request message. The first downlink communication connection between the terminal and the second device is established in the random access, so that the time delay of the terminal accessing the second device can be reduced.

In an optional design of the third aspect, the first message further includes information of a reference signal received power, RSRP, threshold and an uplink resource of the first device, where the uplink resource of the second device is used for the terminal to establish a first uplink communication connection with the second device according to the uplink resource of the second device, the uplink resource of the first device is used for the terminal to establish a second uplink communication connection with the first device according to the uplink resource of the first device, and the RSRP threshold is used for, if the RSRP of the terminal and the first device is greater than the RSRP threshold, the terminal to send data, signaling or a random access signal to the second device through the first uplink communication connection, or for, if the RSRP of the terminal and the first device is less than the RSRP threshold, the terminal to send data, signaling or a random access signal to the second device through the second uplink communication connection, or for, if the target RSRP is equal to the RSRP threshold, the terminal to send data to the second device through the first uplink communication connection or the second uplink communication connection, signaling or random access signals.

In an optional design of the third aspect, the first message further includes a first PCI and a second PCI; the method further comprises the following steps: and the second equipment sends a second primary synchronization signal PSS and an auxiliary synchronization signal SSS to the terminal, the second PSS and the SSS are used for the terminal to obtain second PCI strength, the second PSS and the SSS correspond to the second PCI, the second PCI strength is used for sending a second message to the second equipment through uplink resources if the first PCI strength is greater than the second PCI strength, the first PCI strength is obtained by the terminal according to the first PSS and the SSS sent by the first equipment, and the first PSS and the SSS correspond to the first PCI.

In an optional design of the third aspect, the first message further includes measurement information, where the measurement information is used to instruct the terminal to acquire a trigger event of the first PCI strength.

In an optional design of the third aspect, the third message or the first message further includes SFN information, where the SFN information is used for the terminal to perform downlink frame synchronization with the second device according to the SFN information.

In an alternative design of the third aspect, the first device is a low frequency base station or a low frequency antenna and the second device is a high frequency base station or a high frequency antenna.

In an optional design of the third aspect, the first message further includes a cell identifier of the second device and a cell identifier of the third device.

In an optional design of the third aspect, the first message further includes a tracking signal, and the tracking signal is used for performing fine downlink synchronization with the second device according to the tracking signal.

In an optional design of the third aspect, the third message further includes information of a downlink resource of the first device, where the downlink resource of the first device is used by the terminal to establish a second downlink communication connection with the first device according to the downlink resource of the first device, and the first downlink communication connection and the second downlink communication connection are used to transmit data to the terminal in a CA manner.

For the description of the advantageous effects of the third aspect of the present application, reference may be made to the description of the advantageous effects of the foregoing first aspect.

A fourth aspect of the present application provides a method of establishing a communication connection.

The method comprises the following steps: a terminal receives a first message of first equipment;

the terminal sends uplink measurement signals to the second equipment and the third equipment;

the terminal sends a second message to the first device;

the terminal receives a third message sent by the first device, where the third message is obtained according to a measurement result, the measurement result includes a first measurement result and a second measurement result, the first measurement result is obtained from the uplink measurement signal received by the second device, the second measurement result is obtained from the uplink measurement signal received by the third device, the third message includes information of downlink resources of the second device, and the downlink resources of the second device are used for the terminal to establish a first downlink communication connection with the second device according to the downlink resources of the second device.

The terminal establishes downlink communication connection with the second equipment through the first equipment. Therefore, the broadcasting resource of the second device can be saved, and even the common channel broadcasting of the second device is closed, so that the energy consumption of the second device is reduced. In addition, if there are a plurality of devices, other than the first device, that can provide the downlink service to the terminal within the signal coverage of the first device, it is desirable to select a device with a stronger signal to provide the downlink service to the terminal. The terminal sends an uplink measurement signal, the measurement device obtains the strength of the uplink measurement signal, and can obtain the signal quality of the second device and the terminal and the signal quality of the third device and the terminal, and the measurement device may be the second device, the third device, or a Building Base Band Unit (BBU) device, etc. The magnitude of the two signal qualities affects whether the terminal establishes the first downlink communication connection with the second device or the third device. If only the signal quality, i.e. the measurement result, affects the selection of the second device or the third device, the second device is selected to provide the downlink service for the terminal under the condition that the first measurement result is greater than the second measurement result. Compared with the method that the terminal measures the PCI strength of the PSS and the SSS sent by the second equipment and the third equipment, the method can save downlink resources of the second equipment and the third equipment. In particular, the second message is used for random access, so that the time delay of the terminal accessing the second device is reduced.

In an optional design of the fourth aspect, the first message further includes information of a transmission period;

the terminal sending uplink measurement signals to the second device and the third device includes:

and the terminal sends the uplink measurement signal to the second equipment and the third equipment according to the sending period.

For example, for different moving speeds of the terminal, it is desirable that the periods of the terminal sending the uplink measurement signal are different, and if the moving speed is high, the sending period is small, and if the moving speed is low, the sending period is large. For another example, for different electric quantities of the terminal, it is desirable that the terminal has different periods for transmitting the uplink measurement signal, and the transmission period is small as the remaining electric quantity is larger, and the transmission period is large as the remaining electric quantity is smaller.

In an optional design of the fourth aspect, the first message further includes information of a first uplink measurement resource, where the first uplink measurement resource is used for a terminal that is not allocated to the measurement resource to transmit an uplink measurement signal. Although the second device or the third device is not aware of the identity of the terminal not allocated with the measurement resource, a thermodynamic diagram of the terminal not allocated with the measurement resource can be obtained, which is beneficial to the judgment of the load by the second device or the third device, so that the current network state can be determined, for example, the current network state can be used for energy saving.

In an optional design of the fourth aspect, the first message is derived from the measurement results and available resources, the available resources including available resources of the second device and available resources of the third device. Besides, the measurement result may affect whether the terminal establishes the first downlink communication connection with the second device or establishes the first downlink communication connection with the third device, and the available resource is also one of the factors. The available resource may be a spectrum resource, or a Central Processing Unit (CPU) utilization, etc. And the DL which decides whether the second equipment or the third equipment is selected as the terminal is jointly determined by two factors, so that the normal establishment of the first downlink communication connection is further ensured.

In an optional design of the fourth aspect, the third message is sent by a fourth device to the terminal through the first device, and the third message is obtained by the fourth device according to the first measurement result and the second measurement result.

In an optional design of the fourth aspect, the third message or the first message further includes SFN information, and the SFN information is used for the terminal to perform downlink frame synchronization with the second device according to the SFN information. And the terminal cannot complete the downlink frame synchronization with the second equipment through the broadcast information of the second equipment under the condition that the second equipment does not perform the common channel broadcast. Through the SFN information in the first message, the terminal may complete downlink frame synchronization with the second device, thereby improving the success rate of data transmission. Further, the SFN information is a time offset of the first device and the second device. Because the terminal performs downlink frame synchronization with the first device, the terminal can realize downlink frame synchronization with the second device after acquiring the time offset between the first device and the second device.

In an alternative design of the fourth aspect, the first device is a low frequency base station or a low frequency antenna, and the second device is a high frequency base station or a high frequency antenna. The low frequency and the high frequency are relative, and in the case that the center frequency of the spectrum resource used by the second base station is greater than the center frequency of the spectrum resource used by the first base station, the second device may be considered as a high frequency base station, and the first device may be considered as a low frequency base station. Under the same power, the signal coverage of the high-frequency base station is smaller than that of the low-frequency base station. Therefore, the number of high frequency base stations needs to be larger than the number of low frequency base stations. By reducing or turning off the common channel broadcast of the high frequency base stations, more energy consumption may be reduced than by turning off or reducing the common channel broadcast of the low frequency base stations.

In an optional design of the fourth aspect, the first message further includes a cell identifier of the second device and a cell identifier of the third device.

In an optional design of the fourth aspect, the third message further includes information of a downlink resource of the first device, where the downlink resource of the first device is used for the terminal to establish a second downlink communication connection with the first device according to the downlink resource of the first device, and the first downlink communication connection and the second downlink communication connection are used to transmit data to the terminal in a CA manner. The first downlink communication connection and the second downlink communication connection transmit data to the terminal in a CA mode, so that the transmission efficiency of the downlink data of the terminal can be improved.

In an optional design of the fourth aspect, the first message further includes a tracking signal, and the tracking signal is used for performing fine downlink synchronization between the terminal and the second device according to the tracking signal. The fine synchronization refers to precise synchronization, and may include precise time and frequency synchronization. And under the condition that the second equipment does not carry out common channel broadcasting, the terminal cannot finish the downlink fine synchronization with the second equipment through the broadcasting information of the second equipment. And the terminal can finish the downlink fine synchronization with the second equipment through the tracking signal in the first message, thereby improving the reliability of data transmission.

A fifth aspect of the present application provides a method of establishing a communication connection.

The method comprises the following steps:

a first device sends a first message to a terminal, wherein the first message is used for the terminal to send uplink measurement signals to a second device and a third device according to the first message;

the first equipment receives a second message sent by the terminal;

the first device sends a third message to the terminal, where the third message is obtained according to a measurement result, the measurement result includes a first measurement result and a second measurement result, the first measurement result is obtained from the uplink measurement signal received by the second device, the second measurement result is obtained from the uplink measurement signal received by the third device, the third message includes information of downlink resources of the second device, and the downlink resources of the second device are used for the terminal to establish a first downlink communication connection with the second device according to the downlink resources of the second device. In an optional design of the fifth aspect, the first message further includes information of an uplink resource for sending measurement information, where the information of the uplink resource for sending measurement information includes information of an uplink resource of the second device, and the uplink resource for sending the uplink measurement signal to the second device and the third device through the uplink resource for sending measurement information by the terminal.

In an optional design of the fifth aspect, the first message further includes information of a sending period, where the sending period is used for the terminal to send the uplink measurement signal to the second device and the third device according to the sending period.

In an optional design of the fifth aspect, the first message further includes information of a first uplink measurement resource, where the first measurement resource is used for a terminal that is not allocated to the measurement resource to transmit an uplink measurement signal.

In an optional design of the fifth aspect, the third message is derived from the measurement results and available resources, the available resources including available resources of the second device and available resources of the third device.

In an optional design of the fifth aspect, the third message is sent by a fourth device to the terminal through the first device, and the third message is obtained by the fourth device according to the first measurement result and the second measurement result.

In an optional design of the fifth aspect, the third message or the first message further includes SFN information, and the SFN information is used for the terminal to perform downlink frame synchronization with the second device according to the SFN information.

In an optional design of the fifth aspect, the first device is a low frequency access network device or a low frequency antenna, and the second device is a high frequency access network device or a high frequency antenna.

In an optional design of the fifth aspect, the first message further includes a cell identifier of the second device and a cell identifier of the third device.

In an optional design of the fifth aspect, the third message further includes information of downlink resources of the first device, where the information of downlink resources of the first device is used by the terminal to establish a second downlink communication connection with the first device according to the downlink resources of the first device, and the first downlink communication connection and the second downlink communication connection are used to transmit data to the terminal in a carrier aggregation CA manner.

In an optional design of the fifth aspect, the third message or the first message further includes a tracking signal, and the tracking signal is used for performing fine downlink synchronization between the terminal and the second device according to the tracking signal.

For a description of the advantageous effects of the fifth aspect of the present application, reference may be made to the description of the advantageous effects of the foregoing fourth aspect.

A sixth aspect of the present application provides a method of establishing a communication connection.

The method comprises the following steps:

and the second equipment receives an uplink measurement signal sent by the terminal, wherein the uplink measurement signal is obtained by the terminal according to the first message sent by the first equipment.

The second device sends an acknowledgement message to the first device, where the acknowledgement message is used to enable the first device to send a third message to the terminal after receiving a second message, where the third message is obtained according to a measurement result, the measurement result includes a first measurement result and a second measurement result, the first measurement result is obtained from the uplink measurement signal received by the second device, the second measurement result is obtained from the uplink measurement signal received by the third device, the third message includes information of downlink resources of the second device, and the downlink resources of the second device are used for the terminal to establish a first downlink communication connection with the second device according to the downlink resources of the second device.

In an optional design of the sixth aspect, the first message further includes information of a sending period, where the sending period is used for the terminal to send the uplink measurement signal to the second device and the third device according to the sending period.

In an optional design of the sixth aspect, the first message further includes information of a first uplink measurement resource, where the first measurement resource is used for a terminal that is not allocated to the measurement resource to transmit an uplink measurement signal.

In an optional design of the sixth aspect, the third message is derived from the measurement results and available resources, the available resources including available resources of the second device and available resources of the third device.

In an optional design of the sixth aspect, the third message is sent by a fourth device to the terminal through the first device, and the third message is obtained by the fourth device according to the first measurement result and the second measurement result.

In an optional design of the sixth aspect, the third message or the first message further includes SFN information, and the SFN information is used for the terminal to perform downlink frame synchronization with the second device according to the SFN information.

In an alternative design of the sixth aspect, the first device is a low frequency base station or a low frequency antenna, and the second device is a high frequency base station or a high frequency antenna.

In an optional design of the sixth aspect, the first message further includes a cell identifier of the second device and a cell identifier of the third device.

In an optional design of the sixth aspect, the third message further includes information of downlink resources of the first device, where the information of downlink resources of the first device is used by the terminal to establish a second downlink communication connection with the first device according to the downlink resources of the first device, and the first downlink communication connection and the second downlink communication connection are used to transmit data to the terminal in a carrier aggregation CA manner.

In an optional design of the sixth aspect, the first message further includes a tracking signal, and the tracking signal is used for performing fine downlink synchronization between the terminal and the second device according to the tracking signal.

For the description of the advantageous effects of the sixth aspect of the present application, reference may be made to the description of the advantageous effects of the foregoing fourth aspect.

A seventh aspect of the present application provides an apparatus for establishing a communication connection.

The device includes: a first receiving module, configured to receive a first message sent by a first device, where the first message includes information of an uplink resource of a second device;

a sending module, configured to send a second message to the second device through the uplink resource of the second device.

A second receiving module, configured to receive a third message sent by a first device, where the third message includes information of a downlink resource of a second device, and the downlink resource of the second device is used for the terminal to establish a first downlink communication connection with the second device according to the downlink resource of the second device.

In an optional design of the seventh aspect, the first message further includes an RSRP threshold and information of an uplink resource of the first device, where the uplink resource of the second device is used by the apparatus to establish a first uplink communication connection with the second device according to the uplink resource of the second device, and the uplink resource of the first device is used by the terminal to establish a second uplink communication connection with the first device according to the uplink resource of the first device; the sending module is further configured to send data, signaling or a random access signal to the second device through the first uplink communication connection if RSRP between the apparatus and the first device is greater than the RSRP threshold; or the like, or, alternatively,

the sending module is further configured to send data, signaling or a random access signal to the second device through the second uplink communication connection if RSRP of the apparatus and the first device is smaller than the RSRP threshold; or the like, or, alternatively,

the sending module is further configured to send data, signaling, or a random access signal through the first uplink communication connection or the second uplink communication connection if RSRP of the apparatus and the first device is equal to the RSRP threshold.

In an optional design of the seventh aspect, the first message further includes a first PCI and a second PCI;

the first receiving module is further configured to receive a first primary synchronization signal PSS and a secondary synchronization signal SSS sent by the second device, where the first PSS and the SSS correspond to the first PCI;

the first receiving module is further configured to receive a second PSS and SSS sent by the third device, where the second PSS and SSS correspond to the second PCI;

the sending module is specifically configured to send the second message to the second device through an uplink resource of the second device if a first PCI strength is greater than a second PCI strength, where the first PCI strength is a signal strength of the first PSS and the SSS, and the second PCI strength is a signal strength of the second PSS and the SSS.

In an optional design of the seventh aspect, the first message further includes measurement information, where the measurement information is used to instruct the terminal to acquire a trigger event of the first PCI strength and/or the second PCI strength.

In an optional design of the seventh aspect, the third message or the first message further includes SFN information, and the SFN information is used for the apparatus to perform downlink frame synchronization with the second device according to the SFN information.

In an alternative design of the seventh aspect, the first device is a low frequency base station or a low frequency antenna, and the second device is a high frequency base station or a high frequency antenna.

In an optional design of the seventh aspect, the first message further includes a cell identifier of the second device and a cell identifier of the third device.

In an optional design of the seventh aspect, the third message further includes information of downlink resources of the first device, where the downlink resources of the first device are used by the terminal to establish a first downlink communication connection with the first device according to the downlink resources of the first device, and the first downlink communication connection and the second downlink communication connection are used to transmit data to the terminal in a CA manner.

In an optional design of the seventh aspect, the first message further includes a tracking signal, and the tracking signal is used for fine downlink synchronization of the apparatus with the second device according to the tracking signal.

An eighth aspect of the present application provides an apparatus for establishing a communication connection.

The device includes: a first sending module, configured to send a first message to a terminal, where the first message includes information of an uplink resource of a second device, and the uplink resource of the second device is used for the terminal to send a second message to the second device through the uplink resource of the second device;

a second sending module, configured to send a third message to the terminal, where the third message includes information of a downlink resource of the second device, and the downlink resource of the second device is used for the terminal to establish a first downlink communication connection with the second device according to the downlink resource of the second device.

In an optional design of the eighth aspect, the first message further includes information of a reference signal received power, RSRP, threshold and an uplink resource of the first device, the uplink resource of the second device is used for the terminal to establish a first uplink communication connection with the second device according to the uplink resource of the second device, the uplink resource of the first device is used for the terminal to establish a second uplink communication connection with the first device according to the uplink resource of the first device, the RSRP threshold is used for, if the RSRP of the terminal and the first device is greater than the RSRP threshold, the terminal to send data, signaling or a random access signal to the second device through the first uplink communication connection, or used for, if the RSRP of the terminal and the first device is less than the RSRP threshold, the terminal to send data, signaling or a random access signal to the second device through the second uplink communication connection, or used for, if the target RSRP is equal to the RSRP threshold, the terminal to send data through the first uplink communication connection or the second uplink communication connection, signaling or random access signals.

In an optional design of the eighth aspect, the first message further includes a first PCI and a second PCI;

the first sending module is further configured to send a first primary synchronization signal PSS and an auxiliary synchronization signal SSS to the terminal, where the first PSS and the SSS are used for the terminal to obtain a first PCI strength, the first PSS and the SSS correspond to the first PCI, and the first PCI strength is used for the terminal to send a second message to the second device through the uplink resource if the first PCI strength is greater than a second PCI strength, where the second PCI strength is obtained by the terminal according to a second PSS and an SSS sent by the second device, and the second PSS and the SSS correspond to the second PCI.

In an optional design of the eighth aspect, the first message further includes measurement information, and the measurement information is used to instruct the terminal to acquire a trigger event of the first PCI strength and/or the second PCI strength.

In an optional design of the eighth aspect, the third message or the first message further includes SFN information, and the SFN information is used for the terminal to perform downlink frame synchronization with the second device according to the SFN information.

In an alternative design of the eighth aspect, the apparatus is a low frequency base station or a low frequency antenna and the second device is a high frequency base station or a high frequency antenna.

In an optional design of the eighth aspect, the first message further includes a cell identification of the second device and a cell identification of the third device.

In an optional design of the eighth aspect, the first message further includes a tracking signal, and the tracking signal is used for performing fine downlink synchronization with the second device according to the tracking signal.

In an optional design of the eighth aspect, the third message further includes information of a downlink resource of the first device, where the downlink resource of the first device is used by the terminal to establish a second downlink communication connection with the first device according to the downlink resource of the first device, and the first downlink communication connection and the second downlink communication connection are used to transmit data to the terminal in a CA manner.

A ninth aspect of the present application provides an apparatus for establishing a communication connection.

The device includes: a receiving module, configured to receive a second message sent by a terminal through an uplink resource of a second device, where the uplink resource of the second device is obtained by the terminal from a first message sent by a first device.

A sending module, configured to send a confirmation message to the first device, where the confirmation message is used to enable the first device to send a third message to a terminal, where the third message includes information of a downlink resource of a second device, and the downlink resource of the second device is used for the terminal to establish a first downlink communication connection with the second device according to the downlink resource of the second device.

In an optional design of the ninth aspect, the first message further includes information of a reference signal received power, RSRP, threshold and an uplink resource of the first device, the uplink resource of the second device is used for the terminal to establish a first uplink communication connection with the second device according to the uplink resource of the second device, the uplink resource of the first device is used for the terminal to establish a second uplink communication connection with the first device according to the uplink resource of the first device, the RSRP threshold is used for, if the RSRP of the terminal and the first device is greater than the RSRP threshold, the terminal to send data, signaling or a random access signal to the second device through the first uplink communication connection, or used for, if the RSRP of the terminal and the first device is less than the RSRP threshold, the terminal to send data, signaling or a random access signal to the second device through the second uplink communication connection, or used for, if the target RSRP is equal to the RSRP threshold, the terminal to send data through the first uplink communication connection or the second uplink communication connection, signaling or random access signals.

In an optional design of the ninth aspect, the first message further includes a first PCI and a second PCI;

the sending module is further configured to send a second primary synchronization signal PSS and an additional synchronization signal SSS to the terminal, where the second PSS and the SSS are used for the terminal to obtain a second PCI strength, the second PSS and the SSS correspond to a second PCI, and the second PCI strength is used for the terminal to send a second message to the second device through the uplink resource if the first PCI strength is greater than the second PCI strength, where the first PCI strength is obtained by the terminal according to the first PSS and the SSS sent by the first device, and the first PSS and the SSS correspond to the first PCI.

In an optional design of the ninth aspect, the first message further includes measurement information, and the measurement information is used to instruct the terminal to acquire a trigger event of the first PCI strength and/or the second PCI strength.

In an optional design of the ninth aspect, the third message or the first message further includes SFN information, and the SFN information is used for the terminal to perform downlink frame synchronization with the second device according to the SFN information.

In an alternative design of the ninth aspect, the first device is a low frequency base station or a low frequency antenna and the second device is a high frequency base station or a high frequency antenna.

In an optional design of the ninth aspect, the first message further includes a cell identification of the second device and a cell identification of the third device.

In an optional design of the ninth aspect, the first message further includes a tracking signal, and the tracking signal is used for performing fine downlink synchronization with the second device according to the tracking signal.

In an optional design of the ninth aspect, the third message further includes information of a downlink resource of the first device, where the downlink resource of the first device is used by the terminal to establish a second downlink communication connection with the first device according to the downlink resource of the first device, and the first downlink communication connection and the second downlink communication connection are used to transmit data to the terminal in a CA manner.

A tenth aspect of the present application provides an apparatus for establishing a communication connection.

The device includes:

the first receiving module is used for receiving a first message of first equipment;

the first sending module is used for sending uplink measurement signals to the second equipment and the third equipment;

a second sending module, configured to send a second message to the first device;

a second receiving module, configured to receive a third message sent by the first device, where the third message is obtained according to a measurement result, where the measurement result includes a first measurement result and a second measurement result, the first measurement result is obtained from the uplink measurement signal received by the second device, the second measurement result is obtained from the uplink measurement signal received by the third device, the third message includes information of downlink resources of the second device, and the downlink resources of the second device are used for the terminal to establish a first downlink communication connection with the second device according to the downlink resources of the second device.

The first sending module is specifically configured to send the uplink measurement signal to the second device and the third device through the uplink resource of the measurement information.

In an optional design of the tenth aspect, the first message further includes information of a transmission period;

the first sending module is specifically configured to send the uplink measurement signal to the second device and the third device according to the sending period.

In an optional design of the tenth aspect, the first message further includes information of a first uplink measurement resource, where the first uplink measurement resource is used for a terminal that is not allocated to the measurement resource to transmit an uplink measurement signal.

In an optional design of the tenth aspect, the first message is derived from the measurement results and available resources, the available resources including available resources of the second device and available resources of the third device.

In an optional design of the tenth aspect, the third message is sent by a fourth device to the terminal through the first device, and the third message is obtained by the fourth device according to the first measurement result and the second measurement result.

In an optional design of the tenth aspect, the third message or the first message further includes SFN information, and the SFN information is used for the terminal to perform downlink frame synchronization with the second device according to the SFN information.

In an alternative design of the tenth aspect, the first device is a low frequency base station or a low frequency antenna and the second device is a high frequency base station or a high frequency antenna.

In an optional design of the tenth aspect, the first message further includes a cell identifier of the second device and a cell identifier of the third device.

In an optional design of the tenth aspect, the third message further includes information of a downlink resource of the first device, where the downlink resource of the first device is used by the terminal to establish a second downlink communication connection with the first device according to the downlink resource of the first device, and the first downlink communication connection and the second downlink communication connection are used to transmit data to the terminal in a CA manner.

In an optional design of the tenth aspect, the first message further includes a tracking signal, and the tracking signal is used for performing fine downlink synchronization between the terminal and the second device according to the tracking signal.

An eleventh aspect of the present application provides an apparatus for establishing a communication connection.

The device includes:

a first sending module, configured to send a first message by a terminal, where the first message is used for the terminal to send an uplink measurement signal to a second device and a third device according to the first message;

a receiving module, configured to receive a second message sent by the terminal;

a second sending module, configured to send a third message to the terminal, where the third message is obtained according to a measurement result, the measurement result includes a first measurement result and a second measurement result, the first measurement result is obtained from the uplink measurement signal received by the second device, the second measurement result is obtained from the uplink measurement signal received by the third device, the third message includes information of a downlink resource of the second device, and the downlink resource of the second device is used for the terminal to establish a first downlink communication connection with the second device according to the downlink resource of the second device. In an optional design of the eleventh aspect, the first message further includes information of an uplink resource for sending measurement information, where the information of the uplink resource for sending measurement information includes information of an uplink resource of the second device, and the uplink resource for sending the uplink measurement signal to the second device and the third device through the uplink resource for sending measurement information by the terminal.

In an optional design of the eleventh aspect, the first message further includes information of a transmission period, where the transmission period is used for the terminal to transmit the uplink measurement signal to the second device and the third device according to the transmission period.

In an optional design of the eleventh aspect, the first message further includes information of a first uplink measurement resource, where the first uplink measurement resource is used for a terminal that is not allocated to a measurement resource to transmit an uplink measurement signal.

In an optional design of the eleventh aspect, the third message is derived from the measurement results and available resources, the available resources including available resources of the second device and available resources of the third device.

In an optional design of the eleventh aspect, the third message is sent by a fourth device to the terminal through the first device, and the third message is obtained by the fourth device according to the first measurement result and the second measurement result.

In an optional design of the eleventh aspect, the third message or the first message further includes SFN information, and the SFN information is used for the terminal to perform downlink frame synchronization with the second device according to the SFN information.

In an alternative design of the eleventh aspect, the first device is a low frequency base station or a low frequency antenna and the second device is a high frequency base station or a high frequency antenna.

In an optional design of the eleventh aspect, the first message further includes a cell identification of the second device and a cell identification of the third device.

In an optional design of the eleventh aspect, the third message further includes information of downlink resources of the first device, where the information of downlink resources of the first device is used by the terminal to establish a second downlink communication connection with the first device according to the downlink resources of the first device, and the first downlink communication connection and the second downlink communication connection are used to transmit data to the terminal in a carrier aggregation CA manner.

In an optional design of the eleventh aspect, the first message further includes a tracking signal, and the tracking signal is used for performing fine downlink synchronization between the terminal and the second device according to the tracking signal.

A twelfth aspect of the present application provides an apparatus for establishing a communication connection.

The device includes:

the receiving module is configured to receive an uplink measurement signal sent by a terminal, where the uplink measurement signal is obtained by the terminal according to a first message sent by a first device.

A sending module, configured to send an acknowledgement message to the first device, where the acknowledgement message is used to enable the first device to send a third message to the terminal after receiving a second message, where the third message is obtained according to a measurement result, the measurement result includes a first measurement result and a second measurement result, the first measurement result is obtained by the uplink measurement signal received by the second device, the second measurement result is obtained by the uplink measurement signal received by the third device, the third message includes information of downlink resources of the second device, and the downlink resources of the second device are used for the terminal to establish a first downlink communication connection with the second device according to the downlink resources of the second device.

In an optional design of the twelfth aspect, the first message further includes information of a sending period, where the sending period is used for the terminal to send the uplink measurement signal to the second device and the third device according to the sending period.

In an optional design of the twelfth aspect, the first message further includes information of a first uplink measurement resource, where the first uplink measurement resource is used for a terminal that is not allocated to the measurement resource to transmit an uplink measurement signal.

In an optional design of the twelfth aspect, the third message is derived from the measurement results and available resources, the available resources including available resources of the second device and available resources of the third device.

In an optional design of the twelfth aspect, the third message is sent by a fourth device to the terminal through the first device, and the third message is obtained by the fourth device according to the first measurement result and the second measurement result.

In an optional design of the twelfth aspect, the third message or the first message further includes SFN information, and the SFN information is used for the terminal to perform downlink frame synchronization with the second device according to the SFN information.

In an optional design of the twelfth aspect, the first device is a low frequency base station or a low frequency antenna, and the second device is a high frequency base station or a high frequency antenna.

In an optional design of the twelfth aspect, the first message further includes a cell identifier of the second device and a cell identifier of the third device.

In an optional design of the twelfth aspect, the third message further includes information of downlink resources of the first device, where the information of downlink resources of the first device is used by the terminal to establish a second downlink communication connection with the first device according to the downlink resources of the first device, and the first downlink communication connection and the second downlink communication connection are used to transmit data to the terminal in a CA manner.

In an optional design of the twelfth aspect, the first message further includes a tracking signal, and the tracking signal is used for performing fine downlink synchronization between the terminal and the second device according to the tracking signal.

A thirteenth aspect of the present application provides a terminal, including a transceiver and a processor, where the transceiver is configured to receive a first message sent by a first device, where the first message includes information of an uplink resource of a second device; and sending a second message to the second equipment through the uplink resource of the second equipment. Receiving a third message sent by a first device, where the third message includes information of a downlink resource of a second device, and the downlink resource of the second device is used for the terminal to establish a first downlink communication connection with the second device according to the downlink resource of the second device.

In an optional design of the thirteenth aspect, the first message further includes an RSRP threshold and information of an uplink resource of the first device, where the uplink resource of the second device is used by the apparatus to establish a first uplink communication connection with the second device according to the uplink resource of the second device, and the uplink resource of the first device is used by the terminal to establish a second uplink communication connection with the first device according to the uplink resource of the first device; the sending module is further configured to send data, signaling or a random access signal to the second device through the first uplink communication connection if RSRP between the apparatus and the first device is greater than the RSRP threshold; or the like, or, alternatively,

the transceiver is further configured to send data, signaling or a random access signal to the second device through the second uplink communication connection if RSRP of the apparatus and the first device is less than the RSRP threshold; or the like, or, alternatively,

the transceiver is further configured to send data, signaling, or a random access signal through the first uplink communication connection or the second uplink communication connection if RSRP of the apparatus and the first device is equal to the RSRP threshold.

In an optional design of the thirteenth aspect, the first message further includes a first PCI and a second PCI;

the transceiver is further configured to receive a first primary synchronization signal PSS and a secondary synchronization signal SSS transmitted by the second device,

the first PSS and SSS correspond to the first PCI;

the transceiver is further configured to receive a second PSS and SSS transmitted by the third device, the second PSS and SSS corresponding to the second PCI;

the transceiver is specifically configured to send the second message to the second device through an uplink resource of the second device if a first PCI strength is greater than a second PCI strength, where the first PCI strength is a signal strength of the first PSS and the SSS, and the second PCI strength is a signal strength of the second PSS and the SSS.

In an optional design of the thirteenth aspect, the first message further includes measurement information, where the measurement information is used to instruct the terminal to acquire a triggering event of the first PCI strength and/or the second PCI strength.

In an optional design of the thirteenth aspect, the third message or the first message further includes SFN information, and the SFN information is used for the apparatus to perform downlink frame synchronization with the second device according to the SFN information.

In an alternative design of the thirteenth aspect, the first device is a low frequency base station or a low frequency antenna, and the second device is a high frequency base station or a high frequency antenna.

In an optional design of the thirteenth aspect, the first message further includes a cell identity of the second device and a cell identity of the third device.

In an optional design of the thirteenth aspect, the third message further includes information of a downlink resource of the first device, where the downlink resource of the first device is used by the terminal to establish a first downlink communication connection with the first device according to the downlink resource of the first device, and the first downlink communication connection and the second downlink communication connection are used to transmit data to the terminal in a CA manner.

In an optional design of the thirteenth aspect, the first message further includes a tracking signal, and the tracking signal is used for performing fine downlink synchronization with the second device according to the tracking signal.

A fourteenth aspect of the present application provides a terminal, including a transceiver and a processor, where the transceiver is configured to send a first message to the terminal, where the first message includes information of an uplink resource of a second device, and the uplink resource of the second device is used for the terminal to send a second message to the second device through the uplink resource of the second device;

the transceiver is configured to send a third message to the terminal, where the third message includes information of a downlink resource of the second device, and the downlink resource of the second device is used for the terminal to establish a first downlink communication connection with the second device according to the downlink resource of the second device.

In an optional design of the fourteenth aspect, the first message further includes information of a reference signal received power, RSRP, threshold and an uplink resource of the first device, the uplink resource of the second device is used for the terminal to establish a first uplink communication connection with the second device according to the uplink resource of the second device, the uplink resource of the first device is used for the terminal to establish a second uplink communication connection with the first device according to the uplink resource of the first device, the RSRP threshold is used for, if the RSRP of the terminal and the first device is greater than the RSRP threshold, the terminal to send data, signaling or a random access signal to the second device through the first uplink communication connection, or used for, if the RSRP of the terminal and the first device is less than the RSRP threshold, the terminal to send data, signaling or a random access signal to the second device through the second uplink communication connection, or used for, if the target RSRP is equal to the RSRP threshold, the terminal to send data through the first uplink communication connection or the second uplink communication connection, signaling or random access signals.

In an optional design of the fourteenth aspect, the first message further includes the first PCI and the second PCI;

the transceiver is further configured to send a first primary synchronization signal PSS and an auxiliary synchronization signal SSS to the terminal, where the first PSS and the SSS are used for the terminal to obtain a first PCI strength, the first PSS and the SSS correspond to the first PCI, and the first PCI strength is used for the terminal to send a second message to the second device through the uplink resource if the first PCI strength is greater than a second PCI strength, where the second PCI strength is obtained by the terminal according to a second PSS and an SSS sent by the second device, and the second PSS and the SSS correspond to the second PCI.

In an optional design of the fourteenth aspect, the first message further includes measurement information, and the measurement information is used to instruct the terminal to acquire a trigger event of the first PCI strength and/or the second PCI strength.

In an optional design of the fourteenth aspect, the third message or the first message further includes SFN information, and the SFN information is used for the terminal to perform downlink frame synchronization with the second device according to the SFN information.

In an alternative design of the fourteenth aspect, the apparatus is a low frequency base station or a low frequency antenna, and the second device is a high frequency base station or a high frequency antenna.

In an optional design of the fourteenth aspect, the first message further includes a cell identification of the second device and a cell identification of the third device.

In an optional design of the fourteenth aspect, the first message further includes a tracking signal, and the tracking signal is used for performing fine downlink synchronization with the second device according to the tracking signal.

In an optional design of the fourteenth aspect, the third message further includes information of a downlink resource of the first device, where the downlink resource of the first device is used by the terminal to establish a second downlink communication connection with the first device according to the downlink resource of the first device, and the first downlink communication connection and the second downlink communication connection are used to transmit data to the terminal in a CA manner.

A fifteenth aspect of the present application provides an access network device, where the terminal includes a transceiver and a processor, where the transceiver is configured to receive a second message sent by the terminal through an uplink resource of a second device, where the uplink resource of the second device is obtained by the terminal from a first message sent by a first device.

The transceiver is configured to send a confirmation message to the first device, where the confirmation message is used to enable the first device to send a third message to the terminal, where the third message includes information of a downlink resource of a second device, and the downlink resource of the second device is used for the terminal to establish a first downlink communication connection with the second device according to the downlink resource of the second device.

In an optional design of the fifteenth aspect, the first message further includes information of a reference signal received power, RSRP, threshold and an uplink resource of the first device, where the uplink resource of the second device is used for the terminal to establish a first uplink communication connection with the second device according to the uplink resource of the second device, the uplink resource of the first device is used for the terminal to establish a second uplink communication connection with the first device according to the uplink resource of the first device, and the RSRP threshold is used for sending data, signaling or a random access signal to the second device through the first uplink communication connection if the RSRP of the terminal and the first device is greater than the RSRP threshold, or used for sending data, signaling or a random access signal to the second device through the second uplink communication connection if the RSRP of the terminal and the first device is less than the RSRP threshold, or used for sending data through the first uplink communication connection or the second uplink communication connection if the target RSRP is equal to the RSRP threshold, signaling or random access signals.

In an optional design of the fifteenth aspect, the first message further includes a first PCI and a second PCI;

the transceiver is further configured to send a second primary synchronization signal PSS and an additional synchronization signal SSS to the terminal, where the second PSS and the SSS are used for the terminal to obtain a second PCI strength, the second PSS and the SSS correspond to a second PCI, and the second PCI strength is used for the terminal to send a second message to the second device through the uplink resource if the first PCI strength is greater than the second PCI strength, where the first PCI strength is obtained by the terminal according to the first PSS and the SSS sent by the first device, and the first PSS and the SSS correspond to the first PCI.

In an optional design of the fifteenth aspect, the first message further includes measurement information, where the measurement information is used to instruct the terminal to acquire a triggering event of the first PCI strength and/or the second PCI strength.

In an optional design of the fifteenth aspect, the third message or the first message further includes SFN information, where the SFN information is used for the terminal to perform downlink frame synchronization with the second device according to the SFN information.

In an alternative design of the fifteenth aspect, the first device is a low frequency base station or a low frequency antenna and the second device is a high frequency base station or a high frequency antenna.

In an optional design of the fifteenth aspect, the first message further includes a cell identification of the second device and a cell identification of the third device.

In an optional design of the fifteenth aspect, the first message further includes a tracking signal, and the tracking signal is used for performing fine downlink synchronization with the second device according to the tracking signal.

In an optional design of the fifteenth aspect, the third message further includes information of a downlink resource of the first device, where the downlink resource of the first device is used by the terminal to establish a second downlink communication connection with the first device according to the downlink resource of the first device, and the first downlink communication connection and the second downlink communication connection are used to transmit data to the terminal in a CA manner.

A sixteenth aspect of the present application provides an access network device, the terminal comprising a memory and a processor, the processor invoking program code stored in the memory to perform the method of any one of the optional designs of the fifth aspect or the fifth aspect.

A seventeenth aspect of the present application provides an access network device, the terminal comprising a memory and a processor, the processor invoking program code stored in the memory to perform the method of any one of the optional designs of the third or fourth aspect.

An eighteenth aspect of the present application provides an access network device comprising a memory and a processor, the processor invoking program code stored in the memory to perform the method of any one of the preceding sixth aspect or the alternative designs of the sixth aspect.

A nineteenth aspect of the present application provides a computer storage medium having stored thereon instructions that, when executed on a computer, cause the computer to perform the method of the first aspect or any one of the alternative designs of the first aspect.

A twentieth aspect of the present application provides a computer storage medium having stored thereon instructions that, when executed on a computer, cause the computer to perform the method of any one of the fourth or the fourth alternative designs.

A twenty-first aspect of the present application provides a computer storage medium, wherein the computer storage medium stores instructions that, when executed on a computer, cause the computer to perform the method of any one of the second aspects or the alternative designs of the second aspect.

A twenty-second aspect of the present application provides a computer storage medium, wherein instructions are stored in the computer storage medium, and when executed on a computer, the instructions cause the computer to perform the method of any one of the fifth aspect and the fifth aspect.

A twenty-third aspect of the present application provides a computer storage medium having stored thereon instructions that, when executed on a computer, cause the computer to perform the method of any one of the alternative designs of the third or fourth aspect.

A twenty-fourth aspect of the present application provides a computer storage medium, wherein instructions are stored in the computer storage medium, and when executed on a computer, cause the computer to perform the method of any one of the previous sixth aspect or the previous sixth aspect.

A twenty-fifth aspect of the present application provides a computer program product, which, when executed on a computer, causes the computer to perform the method of the first aspect or any one of the alternative designs of the first aspect.

A twenty-sixth aspect of the present application provides a computer program product, which, when executed on a computer, causes the computer to perform the method of the first aspect or any one of the alternative designs of the first aspect.

A twenty-seventh aspect of the present application provides a computer program product, which, when executed on a computer, causes the computer to perform the method of any one of the alternative designs of the second aspect or the first aspect.

A twenty-eighth aspect of the present application provides a computer program product, which, when executed on a computer, causes the computer to perform the method of the first aspect or any one of the alternative designs of the first aspect.

A twenty-ninth aspect of the present application provides a computer program product, wherein the computer program product, when executed on a computer, causes the computer to perform the method of any one of the alternative designs of the third aspect or the third aspect.

A thirty-first aspect of the present application provides a computer program product, wherein the computer program product, when executed on a computer, causes the computer to perform the method of the first aspect or any one of the alternative designs of the first aspect.

Drawings

FIG. 1 is a schematic diagram of a network architecture according to an embodiment of the present application;

fig. 2 is a schematic flow chart of random access in the embodiment of the present application;

fig. 3 is a schematic flow chart illustrating the establishment of a communication connection according to an embodiment of the present application;

fig. 4 is a schematic diagram illustrating division of spectrum resources for establishing a communication connection in an embodiment of the present application;

fig. 5a is another schematic flow chart illustrating establishing a communication connection in the embodiment of the present application;

fig. 5b is another schematic flow chart illustrating the establishment of a communication connection in the embodiment of the present application;

fig. 6a is another schematic flow chart illustrating establishing a communication connection in the embodiment of the present application;

fig. 6b is another schematic flow chart illustrating the establishment of a communication connection in the embodiment of the present application;

fig. 7 is another schematic flow chart illustrating establishing a communication connection according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of an apparatus for establishing a communication connection in an embodiment of the present application;

fig. 9 is another schematic structural diagram of an apparatus for establishing a communication connection in an embodiment of the present application;

fig. 10 is another schematic structural diagram of an apparatus for establishing a communication connection in an embodiment of the present application;

fig. 11 is another schematic structural diagram of an apparatus for establishing a communication connection in an embodiment of the present application;

fig. 12 is another schematic structural diagram of an apparatus for establishing a communication connection in an embodiment of the present application;

fig. 13 is another schematic structural diagram of an apparatus for establishing a communication connection in an embodiment of the present application;

fig. 14 is a schematic structural diagram of a terminal in an embodiment of the present application;

fig. 15 is a schematic structural diagram of an access network device in the embodiment of the present application.

Detailed Description

The embodiment of the application provides a method, a device and related equipment for establishing communication connection, which are applied to the field of communication, and can save broadcast resources of second equipment, and the second equipment even does not need to broadcast public messages, thereby reducing the energy consumption of the second equipment.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: a global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, a LTE Frequency Division Duplex (FDD) System, a LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, or a fifth generation Mobile communication (5G) System in the future.

In order to better understand the method for establishing a communication connection in the embodiment of the present application, a network framework in the embodiment of the present application is described below.

Referring to fig. 1, fig. 1 is a schematic diagram of a network architecture according to an embodiment of the present application.

The network comprises: a terminal 101, a first device 102, a second device 103 and a core network device 104.

Terminal 101 may generally refer to a device having communication capabilities with a network device such as an access terminal device, subscriber unit, subscriber station, mobile station, remote terminal device, mobile device, user terminal device, wireless terminal device, user agent, or user equipment. But also cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), handheld devices with wireless communication capabilities, computing devices, other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices (smartwatches, smartbands, etc.), also smart furniture (or appliances), terminal devices in future 5G networks, terminal devices in future evolved Public Land Mobile Networks (PLMNs), or vehicle devices in vehicle networking (V2X), Customer Premises Equipment (CPE), etc. The terminal 101 and the first device 102 communicate with each other using some air interface technology.

The core network device 104 is used for providing user connection, managing users, and carrying service completion. For example, the establishment of the user connection includes functions of Mobility Management (MM), paging (paging), and the like. The user management comprises the description, the Qos and the security of the user (the corresponding security measures provided by the authentication center comprise the security management of the mobile service and the security processing of the access to the external network). Bearer connections include Public Switched Telephone Network (PSTN) to the outside, external circuit data networks and packet data networks, the Internet (Internet), and so on. For example, the core network device 104 may be an access and mobility management function (AMF) mainly responsible for a signaling processing portion, i.e., a control plane function, including functions of access control, mobility management, attach and detach, and gateway selection. The core network device 104 according to the embodiment of the present invention is not limited to the AMF.

The first device 102 and the second device 103 may be configured to implement functions of a wireless physical entity, resource scheduling and radio resource management, radio access control, and mobility management. For example, the first device 102 and the second device 103 may be Radio Access Network (RAN) devices. The radio access network device may be a Base Transceiver Station (BTS) in a GSM or Code Division Multiple Access (CDMA) system, a Node B (NB) in a Wideband Code Division Multiple Access (WCDMA) system, an evolved node B (eNB) in a Long Term Evolution (LTE) system, a radio controller in a Cloud Radio Access Network (CRAN) scenario, a relay node station, a Transmission Reception Point (TRP) in a Long Term Evolution (LTE) system, an access point, a vehicle-mounted device, a roadside unit (RSU), a wearable device, a network device in a future 5G network, such as an NR node B, a next generation access network device (generation node B, a geographical NB), a roadside unit (RSU), a future centralized network device (CU 5G network), a future distributed mobile unit (CU) or a future public mobile unit (terrestrial DU), PLMN), etc.

In the embodiment of the present application, the first device 102 and the second device 103 are different access network devices or different antennas in the same access network device, or different antenna arrays 2, or different radio frequency units, or different active antenna units. Different antennas/radio units refer to antennas that use different spectral resources. For example, the first device 102 is a 4G antenna and the second device 103 is a 5G antenna, or the first device 102 is an antenna supporting both 4G and 5G and the second device 103 is a 5G antenna.

The terminal needs to connect to the network through the first device or the second device, each radio access network device may serve one or more cells (cells), and a plurality of cells served by one radio access network device may adopt a co-frequency deployment mode or an inter-frequency deployment mode. In general, each serving cell in the network is independent of each other, that is, has independent common signaling, such as a Master Information Block (MIB), a System Information Block (SIB) message, a Paging (Paging) message, and the like. The broadcast system information (MIB and SIB1) contains cell selection parameters for each cell in the radio access network device. The terminal measures the RSRP of the wireless channel, calculates the receiving level value of the measuring cell for each cell, then acquires other cell parameters and related cell minimum receiving level requirements from the public message, calculates the receiving level value of the cell selection for each cell, if the receiving level value of the cell selection is larger than a certain threshold value, the cell is taken as a candidate cell, and a proper resident cell is selected in the candidate cell based on the public information. After camping in the cell, the terminal starts a random access procedure, where the random access may include a competitive random access and a non-competitive random access.

In current communication network deployment, energy consumption is a pain point problem, and the electric charge always occupies a high ratio in the operation cost of an operator. Among the energy consumption of the access network device, the RF module accounts for 80% -90% of the energy consumption of the entire access network device, and therefore how to reduce the energy consumption of the RF module is a key point of current research.

A typical way to reduce the power consumption of the radio frequency module is symbol turn-off, where symbol turn-off means that when the access network device does not transmit data in part of symbols, the access network device turns off a power amplifier (power amplifier) in these "no data transmission" symbol periods, thereby reducing the system power consumption. When the access network equipment detects a symbol without data in a time domain, the power supply of the amplifier and related hardware is turned off, and the static power consumption of the hardware is reduced. For example, when the access network device is busy, the PA of the access network device needs to be always on. However, when no data is transmitted, the PA can be turned off briefly from the energy saving perspective, thereby achieving the purpose of saving energy. The power saving benefit of symbol turn off depends on the turn off duration of the amplifier and associated hardware, i.e., the ratio of symbols without data to all symbols. However, since each cell needs to perform common channel broadcasting including synchronization signal block information (SSB), SIB1, and Paging messages, the common channel broadcasting cannot be stopped even in a time slot without data transmission, that is, the ratio of symbols without data to all symbols cannot reach 100%, thereby limiting the energy saving effect of symbol switching off. The reason why the cell cannot stop the common channel broadcast is as follows:

to enter the random access procedure with the second device, the terminal must complete cell search, downlink frame synchronization, cell camping, and other procedures, which require the second device to periodically broadcast a common message, such as SIB1, SSB, or Paging message, on a common channel. In the embodiment of the present application, it is desirable to save broadcast resources of the second device, and even the second device may not broadcast the common message, so that the terminal cannot establish a communication connection with the second device through the random access procedure.

In addition, networks continue to thicken as capacity experience drives networking. The redundancy of the network capacity is continuously improved in idle time, the network is stacked in a wood type mode, and the public channel broadcasting of each frequency band continuously exists. For example, the common channel broadcast of the 3G network and the 4G network exist at the same time, and the common channel broadcast of the 3G network, the 4G network and the 5G network exist at the same time. The overhead of the common channel broadcasts of each frequency band is superimposed on each other, further increasing the energy consumption.

To this end, the embodiment of the present application provides a method for establishing a communication connection. In the method, the terminal is within communication coverage of the first device and also within communication coverage of the second device. The second device reduces the number of broadcasts on the common channel or does not broadcast the common message. The terminal completes the processes of cell search, downlink frame synchronization, cell residence and the like through the public message broadcast by the first device, and acquires the uplink resource of the second device through the first device, thereby completing the process of random access and finally realizing the communication connection between the terminal and the second device. Also, the method is compatible with sign off. Particularly, when the symbol turn-off and the method for establishing the communication connection provided by the embodiment of the present application are simultaneously adopted, the ratio of the symbols without data to all the symbols can theoretically reach 100%, so that the energy-saving effect of the symbol turn-off is enhanced. And, the energy saving benefit of the symbol off depends on the ratio of the symbols without data to all symbols, so the energy saving benefit is unstable. The method for establishing the communication connection provided by the embodiment of the application can enable the second equipment to fixedly turn off some symbols in all symbols, so that the energy-saving benefit is stable. The following describes establishing a communication connection in the embodiment of the present application. For example, the features or contents identified by broken lines in the drawings related to the embodiments of the present application can be understood as optional operations or optional structures of the embodiments. It should be determined that, in the embodiment of the present application, the second device may reduce common channel broadcasting, or may not broadcast common information through a common channel. For convenience of description, the following description will be made by taking the example that the second device does not broadcast the common information through the common channel.

Fig. 2 is a schematic flow chart illustrating establishing a communication connection according to an embodiment of the present application.

Referring to fig. 2, in step 201, a first device sends a first message to a terminal.

The first message includes information of uplink resources of the second device, where the uplink resources of the second device are used for initial access of the terminal. In this embodiment of the present application, because the second device does not broadcast the common information through the common channel, the terminal cannot directly establish a communication connection with the second device, that is, the terminal cannot directly acquire the uplink resource of the second device. In this case, the first device obtains the uplink resource of the second device.

In step 202, the terminal sends a second message to the second device.

And after the terminal acquires the uplink resource of the second equipment through the first message, the terminal sends a second message to the second equipment through the uplink resource of the second equipment. The second message may be an RRC setup request message in random access. For convenience of understanding the second message and the third message provided in the embodiments of the present application, the following describes a flow of the random access in the embodiments of the present application, and it should be determined that the flow of the random access is only an example, and in practical applications, part of the flow is modified, for example, a channel for transmitting signaling is changed, and content of the signaling is changed, which all fall into the protection scope of the present invention. Fig. 3 is a flowchart of random access in the embodiment of the present application.

Referring to fig. 3, in step 301, a terminal transmits a random access preamble to a first device.

The terminal sends a random access prefix to the first device on a Random Access Channel (RACH), and the random access prefix carries a preamble code, so that the first device can estimate a transmission delay between the first device and the terminal. The RACH is in an uplink transmission channel that carries limited control information and has collision characteristics.

In step 302, the first device sends a random access response to the terminal.

After receiving the random access preamble, the first device generates a Random Access Response (RAR) at the MAC layer, and sends the RAR to the terminal on a downlink-synchronization channel (DL-SCH), where the RAR includes: a random access preamble identifier, an uplink resource allocated for Radio Resource Control (RRC) setup request message, a cell-radio network temporary identifier (C-RNTI), and the like.

In step 303, the terminal sends an RRC setup request message to the first device.

The DL-SCH belongs to a broadcast channel, and after receiving the random access response, the terminal needs to determine whether the RAR belongs to its own RAR, for example, by checking with a preamble ID. After the terminal determines that the RAR belongs to the RAR, an RRC layer of the terminal generates an RRC establishment request message, and maps the RRC establishment request message to a Common Control Channel (CCCH) on an uplink-synchronization channel (UL-SCH) to transmit the RRC establishment request message to the first device. The RRC establishment request message carries an Identifier (ID) of the terminal. The RRC establishment request message is mainly used to request an RRC connection to the first device and to transmit an RRC handover complete message generated by the RRC layer and the C-RNTI.

In step 304, the first device sends an RRC setup message to the terminal.

In the aforementioned step 201, when a plurality of different terminals simultaneously use the same preamble sequence, a collision occurs. The terminal can prepare RRC connection only when it receives its own RRC setup message. The RRC setup message is generated by the RRC layer of the first device and transmitted on a CCCH or a Dedicated Control Channel (DCCH) mapped on the DL-SCH.

In step 305, the terminal transmits an RRC setup complete message to the first device.

And after receiving the RRC establishment message, the terminal sends an RRC establishment completion message to the first equipment. If the reason why the terminal transmits the random access preamble to the first device is to transmit a service request (service request) in step 201, the service request is included in the RRC setup complete message.

After the first device sends the RRC setup message to the terminal, that is, after the terminal performs random access, if the network side needs to send data or signaling with the data, the first device may send an RRC reconfiguration message to the terminal, where the RRC reconfiguration message is used for performing data plane bearer configuration and the like.

It should be noted that in the flowchart of fig. 2, the recipient of the second message, i.e. the RRC establishment request message, is not the first device, but the second device. On the contrary, if the first message instructs the terminal to send the uplink measurement signal to the second device and the third device, the terminal may not send the second message to the second device, but send the second message to the first device.

Referring to fig. 2, in step 203, the second device sends an acknowledgement message to the first device.

The confirmation message is used to inform the first device that the second device has received the second message of the second device. And after the terminal receives the information of the downlink resource of the second equipment, the terminal establishes downlink communication connection with the second equipment according to the downlink resource of the second equipment. After the downlink communication connection is established, the terminal may receive downlink data sent by the second device through the downlink communication connection. It should be determined that step 203 may not be performed when the second message is passed through the second device to the fourth device. If step 203 is not performed, the first device may receive the third message sent by the fourth device, and the fourth device may be a BBU.

In step 204, the first device sends a third message to the terminal.

The third message includes information of downlink resources of the second device, and after receiving the third message, the terminal establishes downlink communication connection with the second device according to the downlink resources of the second device in the third message. After establishing the downlink communication connection, the terminal may receive downlink data of the second device. The third message may be an RRC reconfiguration message after random access. It can be understood that the cell identifier corresponding to the information of the downlink resource of the second device may be different from the cell identifier broadcast by the first device.

It was described above how to establish a first downstream communication connection of a terminal with a second device without the second device broadcasting a common message. In practical application, the terminal may further establish a first uplink communication connection with the second device, and establish a second uplink communication connection and a second downlink communication connection with the first device. And the second downlink communication connection and the first downlink communication connection transmit data to the terminal in a CA mode, and the first uplink communication connection is taken as the SUL of the second uplink communication connection. The relevant description is as follows.

First, a description will be made of the division of the spectrum resources of the first device and the second device. Referring to fig. 4, fig. 4 is a schematic diagram illustrating a division of spectrum resources for establishing a communication connection according to an embodiment of the present invention. In fig. 4, the first device is a radio frequency unit in an LTE network, and the second device is a radio frequency unit in a 5G network. The center frequency of the spectrum resource used by the first device is 1.8GHz, the uplink spectrum resource in the first device is LTE UL405, and the downlink spectrum resource is LTE DL403 and NR DL 404. The center frequency of the spectrum resource used by the second device is 3.5GHz, the uplink spectrum resource in the second device is NR UL, and the downlink spectrum resource is NR DL 401. The LTE UL405 and LTE DL403 constitute one LTE cell of 1.8 GHz.

Optionally, a segment of uplink spectrum NR UL406 further exists in the first device, the NR UL406 and NR DL404 form a cell, and the uplink spectrum resource NR UL406 in the second device may be considered as SUL of the cell corresponding to NR DL 404.

It can be understood that the first device may be an NR radio frequency unit, that is, only includes an NR uplink resource and an NR downlink resource, and does not include uplink and downlink resources of an LTE scheme, which is not limited herein.

Optionally, the second downlink communication connection established by the NR DL404 and the first downlink communication connection established by the NR DL401 and the terminal transmit data to the terminal by means of CA.

Next, a description is given of a flow of establishing a communication connection in the embodiment of the present application. In the embodiment of the present application, please refer to fig. 4, it is assumed that an LTE cell of 1.8GHz formed by LTE UL405 and LTE DL403 is cell1, and an NR cell formed by NR DL404 and NR UL406 is cell 2. The cell2 may be used as a Pcell of the terminal, the cell3 where the NR DL401 is located is used as an Scell of the terminal, the cell2 provides the SUL service for the terminal, the cell where the NR DL401 is located is the cell3, and the cell3 provides the DL service for the terminal. After the terminal resides in cell2, except for cell2, the cell providing the DL service for the terminal may be determined or may not be determined. The cell providing the DL service for the terminal may be a certain cell3 that may be understood as a core network device, or a first device, or a second device, etc. and that provides the DL service as the terminal, or only a signal coverage of the second device overlaps with a signal coverage of the first device, or a broadcast message informs the terminal that the cell of the second device may be used as the DL service cell of the terminal. For example, when the first device and the second device are a 4G antenna and a 5G antenna in the same access network device. Through power adjustment, the signal coverage of the 4G antenna and the signal coverage of the 5G antenna are substantially the same, and at this time, the cell3 formed by the 5G antenna can be considered as a cell providing a DL service for the terminal. If the cell that can provide the DL service for the terminal is uncertain, there may be a plurality of cells that can provide the DL service for the terminal, and thus it is necessary to select one of the plurality of cells to provide the DL service for the terminal. These two cases will be described separately below.

Referring to fig. 5a, fig. 5a is another schematic flow chart illustrating establishing a communication connection according to an embodiment of the present application. In fig. 5a, a cell3 that can provide a DL service to a terminal is determined.

In step 501, the first device sends an SSB or SIB1 message to the terminal.

After the terminal resides in the cell2, the terminal receives the SSB or SIB1 message sent by the first device. The SSB or SIB1 message includes information of uplink resources of the second device, which are used for initial access by the terminal. In this embodiment of the present application, because the second device does not broadcast the common information through the common channel, the terminal cannot directly establish a communication connection with the second device, that is, the terminal cannot directly acquire the uplink resource, such as the uplink random access resource, of the second device. In this case, the first device obtains the uplink resource of the second device. The uplink resource of the second device may include an accessible RACH sequence.

In step 502, the terminal transmits an RRC setup request message to the second device.

After the terminal acquires the uplink resource of the second device through the SSB or SIB1 message sent by the first device, the terminal sends an RRC establishment request message to the second device through the uplink resource of the second device.

In step 503, the second device regards cell3 as the Scell that descends in cell 2.

And after receiving the RRC establishment request message sent by the terminal, the second device takes the cell3 as a descending Scell in the cell 2. This process may be an internal process of the second device and may be completed before step 508.

In step 504, the second device sends an acknowledgement message of the RRC setup request message to the first device.

The acknowledgement message is used to inform the first device that the second device received the RRC establishment request message sent by the terminal. In particular, the acknowledgement message may be an RRC setup request message, i.e. the second device forwards the received RRC setup request message to the first device, in order to reduce the modification of the signaling content for compatibility with the related random access procedure. It should be determined that step 504 may not be performed if the first device and the second device are different antennas/radio units in the same access network device.

In step 505, the first device sends an RRC setup message to the terminal.

In step 506, the terminal transmits an RRC setup complete message to the second device.

The description of step 505 may refer to the description related to step 304 in fig. 3, and the description of step 506 may refer to the description related to step 305 in fig. 3. It should be noted that in the foregoing description related to fig. 3, the sender of the RRC setup message and the receiver of the RRC setup complete message are the same antenna of the same device. In the embodiment of the present application, the sender of the RRC setup message is a first device, and the receiver of the RRC setup complete message is a second device.

In step 507, the second device sends an acknowledgement message of the RRC setup complete message to the first device.

The acknowledgement message is used to inform the first device that the second device has received the RRC setup complete message sent by the terminal. In particular, the acknowledgement message may be an RRC setup complete message, i.e. the second device forwards the received RRC setup request message to the first device. It should be determined that step 507 may not be performed if the first device and the second device are different antennas/radio frequency units in the same access network device.

In step 508, the first device sends RRC reconfiguration information to the terminal.

And the first equipment sends an RRC reconfiguration message to the terminal, wherein the RRC reconfiguration message comprises the information of the downlink resource of the second equipment. And after receiving the RRC reconfiguration message, the terminal establishes a first downlink communication connection with the second equipment according to the downlink resource of the second equipment. After the terminal establishes the first downlink communication connection with the second device, the terminal may receive downlink data of the second device from the cell 3.

Optionally, the SSB or SIB1 message in step 501 further includes information of an uplink resource of the first device, and after receiving the SSB or SIB1 message, the terminal may initiate an uplink access procedure to the first device from an uplink spectrum resource corresponding to the cell2, for example, a 1.8G low-frequency uplink spectrum resource. The uplink resource information of the first device is used as the UL resource of the terminal, and the uplink resource information of the second device is used as the SUL resource of the terminal. When the SSB or SIB1 message further includes an RSRP threshold, the terminal determines whether to select UL or SUL for transmitting data or signaling or to initiate a random access procedure according to the RSRP threshold. Specific options include any one or more of the following.

1. And if the RSRP between the terminal and the first equipment is greater than the RSRP threshold, the terminal selects the SUL to transmit data or signaling or initiates a random access process.

2. And if the RSRP between the terminal and the first equipment is less than the RSRP threshold, the terminal selects UL transmission data or signaling or initiates a random access process.

3. And if the RSRP between the terminal and the first equipment is equal to the RSRP threshold, the terminal selects SUL or UL transmission data or signaling or initiates a random access process.

Optionally, the specific selection manner is referred to as manner 1, and in addition to the manner 1, the terminal may use the RSRP threshold in manner 2. The mode 2 is as follows:

1. and if the RSRP between the terminal and the first equipment is greater than the RSRP threshold, the terminal selects UL transmission data or signaling or initiates a random access process.

2. And if the RSRP between the terminal and the first equipment is less than the RSRP threshold, the terminal selects the SUL to transmit data or signaling or initiates a random access process.

With respect to the corresponding description of fig. 5a, reference may be made to the corresponding description of fig. 2 and fig. 3, for example, step 501 may refer to step 201 of fig. 2 described above, and the RRC establishment request message of fig. 5a may refer to the RRC establishment request message of fig. 3 described above.

Optionally, the SSB or SIB1 message further includes indication information, where the indication information is used to indicate whether the terminal determines to send data, signaling, or initiate an uplink resource of a random access procedure in mode 1 or mode 2, where the uplink resource includes the UL and the SUL.

In another embodiment, if the terminal only has the high-frequency uplink resource, that is, only the uplink resource corresponding to the second device, the RSRP threshold may be used by the terminal to determine whether to perform random access on the uplink resource corresponding to the second device, for example, if the RSRP of the terminal and the first device is greater than or equal to the RSRP threshold, the terminal selects the uplink resource corresponding to the second device to transmit data or signaling or initiate a random access process.

Optionally, the RRC reconfiguration message further includes SFN information of the second device, where the SFN information is used for the terminal to perform downlink frame synchronization with the second device according to the SFN information. In the case that the second device does not perform common channel broadcasting, the terminal may not complete downlink frame synchronization with the second device through the broadcast information of the second device. Through the SFN information in the RRC reconfiguration message, the terminal may complete downlink frame synchronization with the second device, thereby improving the success rate of data transmission. The SFN may be an SFN value of the second device. The SFN information may also be a time offset (e.g., SFN difference) between the first device and the second device. Because the terminal performs downlink frame synchronization with the first device, the terminal can realize downlink frame synchronization with the second device after acquiring the time offset between the first device and the second device. It is to be understood that SFN information may also be included in the SSB or SIB1 message of step 501 above.

It is understood that the SFN information of the second device can also be contained in the SSB or SIB1 message. It is understood that the SFN information of the second device can also be included in other system messages, such as SIB2, SIB3, etc., without limitation.

Optionally, before or after the network side sends the RRC reconfiguration message, the network side, for example, the second device or the first device further sends a tracking signal to the terminal, where the tracking signal is used for performing fine downlink synchronization between the terminal and the second device. And the terminal cannot finish the downlink fine synchronization with the second equipment through the broadcast information of the second equipment under the condition that the second equipment does not carry out the common channel broadcast. And the terminal can finish the downlink fine synchronization with the second equipment through the tracking signal in the first message, thereby improving the reliability of data transmission.

Optionally, the RRC reconfiguration message further includes information of downlink resources of the first device. And after receiving the RRC reconfiguration message, the terminal establishes a second downlink communication connection with the first equipment according to the downlink resource of the first equipment. After the terminal establishes the second downlink communication connection with the first device, the terminal may receive downlink data of the first device from the cell 2. The second downlink communication connection and the first downlink communication connection are used for transmitting data to the terminal in a CA manner.

Optionally, the first device is a low frequency base station or a low frequency antenna, and the second device is a high frequency base station or a high frequency antenna. The low frequency and the high frequency are relative, and in the case that the center frequency of the spectrum resource used by the second base station is greater than the center frequency of the spectrum resource used by the first base station, the second device may be considered as a high frequency base station, and the first device may be considered as a low frequency base station. Under the same transmitting power, the signal coverage of the high-frequency base station is smaller than that of the low-frequency base station. Therefore, if it is necessary to cover the same area, the number of high frequency base stations needs to be greater than the number of low frequency base stations. By reducing or turning off the common channel broadcast of the high frequency base stations, more energy consumption may be reduced than by turning off or reducing the common channel broadcast of the low frequency base stations.

Alternatively, steps 504 and 507 may not be performed. Referring to fig. 5b, fig. 5b is another schematic flow chart illustrating establishing a communication connection according to an embodiment of the present application. In fig. 5b, step 504 and step 507 are not performed, and in step 502, the terminal transparently transmits the RRC establishment request message to the fourth device through the second device. After the fourth device obtains the RRC establishment request message sent by the terminal, the fourth device transparently transmits the RRC establishment message to the terminal through the first device in step 505. After receiving the RRC establishment message, in step 503, the fourth device uses the cell3 as a downlink Scell of the cell2, and in step 506, the second device transparently transmits an RRC establishment completion message to the fourth device. After receiving the RRC setup complete message, the fourth device transparently transmits an RRC reconfiguration message to the terminal through the first device in step 508. The case where the cell providing the DL service for the terminal is determined is described above, and the case where the cell providing the DL service for the terminal is not determined is described below. In the case where a cell providing a DL service for a terminal is uncertain, a target serving cell needs to be determined among a plurality of cells. The first mode is that a plurality of devices of a plurality of cells respectively send measurement information, a terminal acquires a plurality of signal strengths of the plurality of measurement information, and the terminal determines a device corresponding to the target serving cell according to the plurality of signal strength strengths. The second way is that the terminal sends the measurement information, a plurality of devices in a plurality of cells respectively obtain a plurality of signal strengths of the measurement information, and a certain device or a core network device in the plurality of devices determines a device corresponding to the target serving cell according to the plurality of signal strengths. The following describes the two modes separately.

Referring to fig. 6a, fig. 6a is another schematic flow chart illustrating establishing a communication connection according to an embodiment of the present application. In fig. 6a, a cell that can provide a DL service to a terminal is uncertain, and measurement information is transmitted by a plurality of devices, respectively, the measurement information being PSS and SSS. For convenience of explanation, the plurality of devices herein includes a second device and a third device. The second device and the third device are different access network devices or different antennas, or antenna arrays, or radio frequency units in the same access network device. The fourth device may be a BBU.

In step 601, the first device sends an SSB or SIB1 message to the terminal.

The SSB or SIB1 message includes the first PCI, the second PCI, the uplink resource of the second device, and the uplink resource of the third device.

Optionally, the SSB or SIB1 message further includes a correspondence between the PCI and the uplink resource, for example, the correspondence may be: the first PCI corresponds to the uplink resource of the second device, and the second PCI corresponds to the uplink resource of the third device. It is understood that the above correspondence may be in an implicit form, such as sending the PCI and the uplink resource together, or implicit through an ordering order, or in an explicit manner, such as indicated by indication information.

It is understood that the correspondence between the PCI and the uplink resource may also be included in other system messages, such as SIB2, SIB3, and the like, which is not limited herein.

Optionally, the SSB or SIB1 message further includes measurement information, where the measurement information is used to instruct the terminal to acquire a trigger event of the first PCI strength and/or the second PCI strength, where the first PCI strength is a downlink signal strength of a cell corresponding to the first PCI, and the second PCI strength is a downlink signal strength of a cell corresponding to the second PCI. The trigger event is a measurement event, where the measurement event indicates how long after the terminal receives the SSB or SIB1 message, the terminal starts and/or ends to measure the first PSS and the SSS sent by the second device, or specifies that the terminal needs to measure the signal strength of the cell corresponding to the frequency band of the second device as long as the terminal resides in the cell2, and obtains the first PCI strength and/or the second PCI strength, or specifies that the terminal needs to measure the signal of the cell of the second device and/or the third device when the downlink RSRP signal strength of the cell2 measured by the terminal is higher than a certain threshold. Other measurement events are also possible and are not limited herein.

Optionally, the SSB or SIB1 message further includes a cell identity of the second device and a cell identity of the third device. It will be appreciated that the inclusion of these two cell identities means that the first device is a shared device. Optionally, the SSB or SIB1 message further indicates a correspondence between the cell identifier and the SUL resource.

In step 602, the third device transmits the second PSS and SSS to the terminal.

The third device broadcasts a common message on a common channel, the common message including the second PSS and the SSS. Optionally, the public message is a reduced version of the public message. For example, when the common message is an SSB, the SSB includes a PSS, an SSS, and an MIB. The MIB may be reduced in the amount of data carried or not, thereby obtaining a simplified version of SSB. It is understood that a simplified version of SSB may include only PSS and SSS. It may be appreciated that the terminal may perform link evaluation based on the received PSS and SSS information and perform uplink power selection based on the link evaluation.

In step 603, the second device transmits the first PSS and SSS to the terminal.

For the detailed description of step 603, refer to the description of step 602.

In step 604, the terminal obtains a first PCI strength for the first PSS and SSS and a second PCI strength for the second PSS and SSS.

The first PCI corresponds to the first PSS and the SSS, the second PCI corresponds to the second PSS and the SSS, the strength of the first PCI is the strength of downlink signals of a cell corresponding to the first PCI, and the strength of the second PCI is the strength of downlink signals of a cell corresponding to the second PCI. After the terminal acquires the first PCI strength and the second PCI strength, it can obtain that the first PCI strength corresponds to the uplink resource of the second device and the second PCI strength corresponds to the uplink resource of the third device according to the correspondence (correspondence between the PCI and the uplink resource) in the SSB or SIB1 message, the correspondence between the first PCI and the first PSS and SSS, and the correspondence between the second PCI and the second PSS and SSS. Under the condition that the first PCI strength is greater than the second PCI strength, the terminal sends an RRC establishment request message to the second equipment through the uplink resource of the second equipment, or performs a random access process or sends uplink data; under the condition that the second PCI strength is greater than the first PCI strength, the terminal sends an RRC establishment request message to the third equipment through the uplink resource of the third equipment, or performs a random access process or sends uplink data; and under the condition that the second PCI strength is equal to the first PCI strength, the terminal sends an RRC establishment request message or carries out a random access process or sends uplink data through uplink resources of third equipment or uplink resources of second equipment.

In step 605, the terminal transmits an RRC setup request message to the fourth device through the second device.

And if the first PCI strength is greater than the second PCI strength, the terminal transmits the RRC establishment request message to the fourth equipment through the second equipment. And if the second PCI strength is greater than the first PCI strength, the terminal transmits the RRC establishment request message to the fourth equipment through the third equipment. In step 606, the fourth device takes cell3 as the Scell that descends in cell 2.

In step 607, the fourth device transmits an acknowledgement message of the RRC establishment request message to the first device through the second device.

In step 608, the terminal transmits an RRC setup complete message to the fourth device through the second device.

In step 609, the fourth device sends RRC reconfiguration information to the terminal through the first device.

The description of fig. 6a may refer to the description of fig. 5a and fig. 5b, for example, step 605 may refer to step 502, and the RRC setup message in step 607 may refer to the RRC setup message in step 505. In particular, any alternative solution in fig. 5b may be correspondingly referred to in fig. 6 a.

Optionally, the method for establishing a communication connection provided in the embodiment of the present application can also be implemented without including the fourth device. Referring to fig. 6b, fig. 6b is another schematic flow chart illustrating establishing a communication connection according to an embodiment of the present application. In fig. 6b, the fourth device of fig. 6a is not included, but step 610 and step 611 are added. In step 605, the terminal transmits the RRC setup request message to the second device, not by the second device transmitting the RRC setup request message to the fourth device. After the second device receives the RRC establishment request message, in step 606, the cell3 is used as the Scell descending in the cell 2. In step 610, the second device sends an acknowledgement message of the RRC establishment request message to the first device according to the received RRC establishment request message, optionally, the request message is an RRC establishment request message. In the absence of the fourth device, after receiving the confirmation message of the RRC establishment request message, the first device transmits an RRC establishment message to the terminal in step 607. In step 608, the terminal does not pass through the RRC setup complete message to the fourth device by the second device, but sends the RRC setup complete message to the second device. After the second device receives the RRC setup complete message sent by the terminal, in step 611, the second device sends an acknowledgement message of the RRC setup complete message to the first device, and optionally, the acknowledgement message of the RRC setup complete message is the RRC setup complete message. And after the first equipment receives the RRC establishment completion message, the first equipment sends an RRC reconfiguration message to the terminal.

The description of fig. 6b may refer to the description of fig. 5a, for example, step 605 may refer to step 502, and the RRC setup message in step 607 may refer to the RRC setup message in step 505. In particular, any alternative solution in fig. 5a may be referred to in fig. 6 a.

The above describes a case where multiple devices respectively transmit measurement information, and the following describes a case where a terminal transmits measurement information, please refer to fig. 7, and fig. 7 is another schematic flow diagram for establishing a communication connection in the embodiment of the present application. In fig. 7, a cell that can provide a DL service to a terminal is uncertain and measurement information is transmitted to a plurality of devices by the terminal. For convenience of explanation, the plurality of devices herein includes a second device and a third device. The second device and the third device are different access network devices or different antennas in the same access network device.

In step 701, the first device sends an SSB or SIB1 message to the terminal.

Optionally, the SSB or SIB1 message includes information used to instruct the terminal to send an uplink measurement signal to the second device and the third device, where the uplink measurement signal may be an SRS, a Physical Random Access Channel (PRACH), or a specific sequence or a specific segment of time-frequency resource, which is not limited herein.

Optionally, the information of the uplink measurement signal sent to the second device and the third device may be sent to the terminal through an SSB or SIB1 message, or may be sent to the terminal through an RRC message, for example, the access network device determines the uplink measurement signal that can be used by each user and sends the uplink measurement signal to the terminal through an RRC message, such as an RRC release message, an RRC reconfiguration message, an RRC establishment message, or may be sent to the terminal through a non-access stratum (NAS) message, for example, the core network device (e.g., AMF) determines the uplink measurement signal that can be used by each user, or the access network device determines the uplink measurement signal that can be used by each user and informs the core network device, and sends the uplink measurement signal to the terminal through a registration accept message, such as a tracking area update NAS (TAU) accept message.

Optionally, the SSB or SIB1 message further includes information of an uplink measurement signal transmission period; after the terminal receives the SSB or SIB1 message, the terminal may transmit measurement information to the second device and the third device according to a transmission period. For example, for different mobile speeds of the terminal, it is desirable that the periods of the terminal sending the uplink measurement signals are different, the mobile speed is high, the reporting period is short, and the mobile speed is low, the sending period is long, for example, the SSB or SIB1 message includes a mapping relationship between the mobile speed and the period of sending the uplink measurement, for example, when the mobile speed of the terminal is 30km/h (kilometer per hour), the period of sending the uplink measurement is 5s once, and when the mobile speed of the terminal is 100km/h, the period of sending the uplink measurement is 100ms once. For another example, for different power levels of the terminal, it is desirable that the periods of the terminal sending the uplink measurement signal are different, the more the remaining power level is, the shorter the reporting period is, and the smaller the remaining power level is, the longer the reporting period is, for example, the SSB or SIB1 message includes a mapping relationship between the remaining power level and the period of sending the uplink measurement, for example, when the remaining power level is 10%, the period of sending the uplink measurement information is 5s once, and when the remaining power level is 80%, the period of sending the uplink measurement information is 100ms once. It is to be understood that the information of the uplink measurement signal transmission period may also be included in other system messages, such as SIB2, SIB3, and the like, which is not limited herein. It is to be understood that the information of the uplink measurement signal transmission period may also be transmitted to the terminal by the network through a specific message, for example, an RRC message, such as an RRC release message, an RRC reconfiguration message, and an RRC setup message; it may also be a NAS message sent by the network to the terminal, such as a registration accept message, a TAU accept message, etc.

Optionally, the SSB or SIB1 message further includes information of a first uplink measurement resource, where the first uplink measurement resource is used for a terminal that is not allocated to the uplink measurement resource to send an uplink measurement signal. After the second device or the third device receives the uplink measurement signal through the uplink measurement signal, although the second device or the third device does not know the identity of the terminal not allocated with the measurement resource, the distribution situation (for example, a cell thermodynamic diagram) of the terminal not allocated with the measurement resource in each cell can be obtained, which is beneficial to the judgment of the second device or the third device on the load, so that the current network state can be determined, for example, the current network state can be used for energy saving. It is to be understood that the thermodynamic diagram of the cell can also be obtained using terminal-specific uplink measurement signals.

In step 702, the terminal transmits an uplink measurement signal to the third device.

In step 703, the terminal sends an uplink measurement signal to the second device.

And the terminal sends an uplink measurement signal to the second equipment. The terminal may send the uplink measurement signal to the second device and the third device, respectively, or may send the uplink measurement signal to the second device and the third device at the same time, that is, step 702 and step 703 are completed in one step.

In step 704, the third device sends the second measurement result to the fourth device.

After receiving the measurement information sent by the terminal, the third device may obtain a measurement result, where the measurement result is related to the signal strength.

In step 705, the second device sends the first measurement result to the fourth device.

In step 706, the terminal transmits an RRC setup request message to the fourth device through the first device.

In step 707, the fourth device sends an RRC setup message to the terminal through the first device.

In step 708, the terminal transmits an RRC setup complete message to the fourth device through the first device.

In step 709, the fourth device sends an uplink transmission message to the core network device.

The fourth device sends an uplink transmission message to the core network device, where the uplink transmission message includes an identifier of the terminal, and the uplink transmission message may be an initial terminal message or another message, which is not limited herein.

In step 710, the core network device sends a fourth message to the fourth device. The core network device finds out the SRS information corresponding to the identifier of the terminal based on the identifier of the terminal in the uplink transmission message, and sends a fourth message to a fourth device, where the fourth message includes the SRS information, that is, the SRS corresponding to the identifier of the terminal. The fourth device obtains an uplink measurement result of the terminal based on the SRS information, and determines the downlink resource and/or the uplink resource used for the terminal based on the measurement result, that is, determines whether the cell of the second device or the cell of the third device serves the terminal. The fourth message may be a UE context setup request message, or may be another message, which is not limited herein.

In step 711, the fourth device determines cell3 as the Scell descending in cell2 and informs the second device.

Optionally, in addition to the measurement results having an impact on the selection of the second device or the third device, the available resources are also a consideration for the selection of the cell of the second device or the third device. The available resources include available resources of the second device and available resources of the third device. The available resources may be spectrum resources, or CPU utilization, etc. And the selection of the DL service provided by the second equipment or the third equipment for the terminal is determined by two factors, so that the normal establishment of the first downlink communication connection is further ensured.

In step 712, the fourth device sends RRC reconfiguration information to the terminal through the first device.

In the description of fig. 7, whether the second device or the third device provides the DL service to the terminal is decided by the fourth device. In practical applications, the function may also be determined by the first device, or the second device, or the third device, or the core network device. For example, in this embodiment of the present application, all or part of the functions that can be implemented by the fourth device are performed by the core network device.

The description of fig. 7 may refer to the description of fig. 5a, for example, step 701 may refer to step 501, and the RRC establishment request message in step 706 may refer to the RRC establishment request message in step 502. In particular, any alternative solution in fig. 5a may be referred to in fig. 7.

While the method for establishing a communication connection in the embodiments of the present application is described above, it should be determined that the method does not necessarily need all the steps, and those skilled in the art may make partial modifications to the method for establishing a communication connection according to the several embodiments provided above, for example, delete partial steps, combine several steps, and the like. The following describes an apparatus for establishing a communication connection in an embodiment of the present application.

Referring to fig. 8, fig. 8 is a schematic structural diagram of an apparatus for establishing a communication connection according to an embodiment of the present application.

The device includes: a first receiving module 801, configured to receive a first message sent by a first device, where the first message includes information of an uplink resource of a second device;

a sending module 802, configured to send a second message to the second device through the uplink resource of the second device.

A second receiving module 803, configured to receive a third message sent by the first device, where the third message includes information of a downlink resource of the second device, and the downlink resource of the second device is used for the terminal to establish the first downlink communication connection with the second device according to the downlink resource of the second device.

Optionally, the modules in the apparatus are further configured to perform all or part of the operations that the terminal in any of the figures can perform as described in fig. 5a, fig. 5b, fig. 6a or fig. 6 b.

Referring to fig. 9, fig. 9 is another schematic structural diagram of an apparatus for establishing a communication connection according to an embodiment of the present application.

The device includes: a first sending module 901, configured to send a first message to a terminal, where the first message includes information of an uplink resource of a second device, and the uplink resource of the second device is used for the terminal to send a second message to the second device through the uplink resource of the second device;

a second sending module 902, configured to send a third message to the terminal, where the third message includes information of a downlink resource of the second device, and the downlink resource of the second device is used for the terminal to establish a first downlink communication connection with the second device according to the downlink resource of the second device.

Optionally, the modules in the apparatus are further configured to perform all or part of the operations that the first device in any of the figures can perform as described in fig. 5a, fig. 5b, fig. 6a, or fig. 6 b.

Referring to fig. 10, fig. 10 is another schematic structural diagram of an apparatus for establishing a communication connection according to an embodiment of the present application.

The device includes: a receiving module 1001, configured to receive a second message sent by a terminal through an uplink resource of a second device, where the uplink resource of the second device is obtained by the terminal from a first message sent by a first device.

A sending module 1002, configured to send a confirmation message to the first device, where the confirmation message is used to enable the first device to send a third message to a terminal, where the third message includes information of a downlink resource of a second device, and the downlink resource of the second device is used for the terminal to establish a first downlink communication connection with the second device according to the downlink resource of the second device.

Optionally, the modules in the apparatus are further configured to perform all or part of the operations that the second device in any of the figures can perform as described in fig. 5a, fig. 5b, fig. 6a, or fig. 6 b.

Referring to fig. 11, fig. 11 is another schematic structural diagram of an apparatus for establishing a communication connection according to an embodiment of the present application.

The device includes:

a first receiving module 1101, configured to receive a first message of a first device;

a first sending module 1102, configured to send an uplink measurement signal to a second device and a third device;

a second sending module 1103, configured to send a second message to the first device;

a second receiving module 1104, configured to receive a third message sent by the first device, where the third message is obtained according to a measurement result, the measurement result includes a first measurement result and a second measurement result, the first measurement result is obtained from the uplink measurement signal received by the second device, the second measurement result is obtained from the uplink measurement signal received by the third device, the third message includes information of a downlink resource of the second device, and the downlink resource of the second device is used for the terminal to establish a first downlink communication connection with the second device according to the downlink resource of the second device.

Optionally, the modules in the apparatus are also configured to perform all or part of the operations that the terminal can perform as described in fig. 7.

Referring to fig. 12, fig. 12 is another schematic structural diagram of an apparatus for establishing a communication connection according to an embodiment of the present application.

The device includes: a first sending module 1201, configured to send a first message by a terminal, where the first message is used for the terminal to send an uplink measurement signal to a second device and a third device according to the first message;

a receiving module 1202, configured to receive a second message sent by the terminal;

a second sending module 1203, configured to send a third message to the terminal, where the third message is obtained according to a measurement result, the measurement result includes a first measurement result and a second measurement result, the first measurement result is obtained from the uplink measurement signal received by the second device, the second measurement result is obtained from the uplink measurement signal received by the third device, the third message includes information of downlink resources of the second device, and the downlink resources of the second device are used for the terminal to establish a first downlink communication connection with the second device according to the downlink resources of the second device. Optionally, the first message further includes information of an uplink resource for sending measurement information, where the information of the uplink resource for the measurement information includes information of an uplink resource of the second device, and the uplink resource for the measurement information is used for the terminal to send the uplink measurement signal to the second device and the third device through the uplink resource for the measurement information.

Optionally, the modules in the apparatus are further configured to perform all or a subset of the operations that the first device is capable of performing as described in fig. 7.

Referring to fig. 13, fig. 13 is another schematic structural diagram of an apparatus for establishing a communication connection according to an embodiment of the present application.

The device includes:

a receiving module 1301, configured to receive an uplink measurement signal sent by a terminal, where the uplink measurement signal is obtained by the terminal according to a first message sent by a first device.

A sending module 1302, configured to send an acknowledgement message to the first device, where the acknowledgement message is used to enable the first device to send a third message to the terminal after receiving a second message, where the third message is obtained according to a measurement result, the measurement result includes a first measurement result and a second measurement result, the first measurement result is obtained by the uplink measurement signal received by the second device, the second measurement result is obtained by the uplink measurement signal received by the third device, the third message includes information of downlink resources of the second device, and the downlink resources of the second device are used for the terminal to establish a first downlink communication connection with the second device according to the downlink resources of the second device.

Optionally, the modules in the apparatus are further configured to perform all or a subset of the operations that the second device is capable of performing as described in fig. 7.

Referring to fig. 14, fig. 14 is a schematic structural diagram of a terminal according to an embodiment of the present application.

When the terminal is a mobile phone, referring to fig. 14, the mobile phone includes: radio Frequency (RF) circuitry 1410, and a processor 1480.

The processor 1480, which is the control center of the mobile phone, connects various parts of the entire mobile phone by using various interfaces and lines, and performs various functions of the mobile phone and processes data by operating or executing software programs and/or modules stored in the memory 1420 and calling data stored in the memory 1420, thereby integrally monitoring the mobile phone.

The RF circuit 1410 may be used for receiving and transmitting signals during a message transmission or call, and in particular, for receiving downlink messages from the access network device and then processing the received downlink messages to the processor 1480; in addition, the data designed for uplink is sent to the access network equipment. In general, RF circuit 1410 includes, but is not limited to, an antenna, at least one Amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the RF circuitry 1410 may also communicate with networks and other devices via wireless communications.

For example, in this embodiment, the RF circuit 1410 is configured to receive a first message sent by a first device, where the first message includes information of an uplink resource of a second device; RF circuitry 1410 is further configured to transmit a second message to the second device over the uplink resource of the second device; the RF circuit 1410 is further configured to receive a third message sent by the first device, where the third message includes information of a downlink resource of a second device, and the downlink resource of the second device is used for the terminal to establish a first downlink communication connection with the second device according to the downlink resource of the second device. Optionally, the RF circuit 1410 is further configured to perform all or a subset of the operations that the terminal of any of the figures can perform as described in fig. 1, fig. 3, fig. 5a, fig. 5b, or fig. 7.

Alternatively, in this embodiment, the RF circuit 1410 is configured to receive a first message from a first device; RF circuitry 1410 is configured to transmit uplink measurement signals to the second device and the third device; RF circuitry 1410 is to send a second message to the first device; the RF circuit 1410 is configured to receive a third message sent by the first device, where the third message is obtained according to a measurement result, where the measurement result includes a first measurement result and a second measurement result, the first measurement result is obtained from the uplink measurement signal received by the second device, the second measurement result is obtained from the uplink measurement signal received by the third device, and the third message includes information of a downlink resource of the second device, where the downlink resource of the second device is used for the terminal to establish a first downlink communication connection with the second device according to the downlink resource of the second device. Optionally, the RF circuit 1410 is further configured to perform all or a subset of the operations that the terminal of any of the figures can perform as described in fig. 1, fig. 3, fig. 6a, fig. 6b, or fig. 7.

Optionally, the cell phone may also include components such as memory 1420, input unit 1430, display unit 1440, sensor 1450, audio circuitry 1460, wireless fidelity module 1470, processor 1480, and power supply 1490. Those skilled in the art will appreciate that the handset configuration shown in fig. 14 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The input unit 1430 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the cellular phone. The memory 1420 may be used to store software programs and modules, and the processor 1480 executes various functional applications and data processing of the cellular phone by operating the software programs and modules stored in the memory 1420. The display unit 1440 may be used to display information input by or provided to the user and various menus of the mobile phone. The Display unit 1440 may include a Display panel 1441, and optionally, the Display panel 1441 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The handset may also include at least one sensor 1450, such as light sensors, motion sensors, and other sensors. Audio circuitry 1460, speaker 1461, microphone 1462 may provide an audio interface between a user and a cell phone. The audio circuit 1460 can transmit the received electrical signal converted from the audio data to the loudspeaker 1461, and the electrical signal is converted into a sound signal by the loudspeaker 1461 and output; on the other hand, the microphone 1462 converts collected sound signals into electrical signals, which are received by the audio circuit 1460 and converted into audio data, which are then processed by the audio data output processor 1480, and then passed through the RF circuit 1410 for transmission to, for example, another cellular phone, or for output to the memory 1420 for further processing.

The handset also includes a power supply 1490 (e.g., a battery) for powering the various components, which may preferably be logically coupled to the processor 1480 via a power management system to provide management of charging, discharging, and power consumption via the power management system.

The above describes the terminal in the embodiment of the present application, and the following describes the access network device in the embodiment of the present application.

Referring to fig. 15, fig. 15 is a schematic structural diagram of an access network device in the embodiment of the present application.

As shown in fig. 15, the access network apparatus 1500 includes a transceiver 1520, and a processor 1510. The access network device may be the first device in fig. 1, fig. 5a, fig. 5b, fig. 6a, fig. 6b or fig. 7.

The transceiver 1520 is configured to send a first message to the terminal, where the first message includes information of an uplink resource of the second device, the uplink resource of the second device is used for the terminal to send a second message to the second device through the uplink resource of the second device, and the second message is used to obtain a third message; and sending a third message to the terminal, wherein the third message comprises information of downlink resources of the second device, and the downlink resources of the second device are used for establishing the first downlink communication connection between the terminal and the second device according to the downlink resources of the second device. Optionally, the transceiver 1520 is also used to perform all operations that the first device may perform, such as the operations that the first device performs in embodiments corresponding to fig. 5a, 5b, 6a or 6 b.

Or the transceiver 1520 is configured to receive a second message sent by the terminal through an uplink resource of a second device, where the uplink resource of the second device is obtained by the terminal from the first message sent by the first device; and sending a confirmation message to a first device, wherein the confirmation message is used for enabling the first device to send a third message to a terminal, the third message comprises information of downlink resources of a second device, and the downlink resources of the second device are used for the terminal to establish a first downlink communication connection with the second device according to the downlink resources of the second device. Optionally, the transceiver 1520 is also used to perform all operations that the second device may perform, such as the operations that the second device performs in embodiments corresponding to fig. 5a, 5b, 6a or 6 b.

Or the transceiver 1520 is configured to send a first message to the terminal by the first device, where the first message is used for the terminal to send uplink measurement signals to the second device and the third device according to the first message; receiving a second message sent by the terminal; sending a third message to the terminal, where the third message is obtained according to a measurement result, the measurement result includes a first measurement result and a second measurement result, the first measurement result is obtained from the uplink measurement signal received by the second device, the second measurement result is obtained from the uplink measurement signal received by the third device, the third message includes information of downlink resources of the second device, and the downlink resources of the second device are used for the terminal to establish a first downlink communication connection with the second device according to the downlink resources of the second device. Optionally, the transceiver 1520 is also used to perform all operations that the second device may perform, such as the operations that the second device performs in the embodiment corresponding to fig. 7.

Or the transceiver 1520 is configured to receive an uplink measurement signal sent by a terminal, where the uplink measurement signal is obtained by the terminal according to a first message sent by a first device; sending an acknowledgement message to the first device, where the acknowledgement message is used to enable the first device to send a third message to the terminal after receiving a second message, where the third message is obtained according to a measurement result, the measurement result includes a first measurement result and a second measurement result, the first measurement result is obtained from the uplink measurement signal received by the second device, the second measurement result is obtained from the uplink measurement signal received by the third device, the third message includes information of downlink resources of the second device, and the downlink resources of the second device are used for the terminal to establish a first downlink communication connection with the second device according to the downlink resources of the second device. Optionally, the transceiver 1520 is also used to perform all operations that the second device may perform, such as the operations that the second device performs in the embodiment corresponding to fig. 7.

The processor 1510 may be an application-specific integrated circuit (ASIC), or a Digital Signal Processor (DSP), or other chip with specific processing functions, such as a baseband chip, or any combination thereof. The processor 1510 may refer to one processor, or may include multiple processors.

The access network device 1500 may also include a memory, which may be disposed within the processor 1510 or external to the processor 1510, that stores elements, executable modules or data structures, or a subset thereof, or an expanded set thereof, of the following: including various operational instructions for performing various operations. Operating the system: including various system programs for implementing various basic services and for handling hardware-based tasks.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: various media that can store program codes, such as a flash disk, a removable hard disk, a ROM, a RAM, a magnetic or optical disk, and the like.

Claims

1. A method for establishing a communication connection, comprising:

a terminal receives a first message sent by first equipment, wherein the first message comprises information of uplink resources of second equipment;

the terminal sends a second message to the second equipment through the uplink resource of the second equipment;

and the terminal receives a third message sent by the first equipment, wherein the third message comprises information of downlink resources of second equipment, and the downlink resources of the second equipment are used for establishing a first downlink communication connection with the second equipment by the terminal according to the downlink resources of the second equipment.

2. The method of claim 1, wherein the first message further includes information of a Reference Signal Received Power (RSRP) threshold and an uplink resource of the first device, wherein the uplink resource of the first device is used by the terminal to establish a second uplink communication connection with the first device according to the uplink resource of the first device, and the uplink resource of the second device is used by the terminal to establish a first uplink communication connection with the second device according to the uplink resource of the second device;

the method further comprises the following steps:

if the RSRP between the terminal and the first equipment is greater than the RSRP threshold, the terminal sends data, signaling or random access signals to the second equipment through the first uplink communication connection; or the like, or, alternatively,

if the RSRP between the terminal and the first equipment is smaller than the RSRP threshold, the terminal sends data, signaling or random access signals to the first equipment through the second uplink communication connection; or the like, or, alternatively,

and if the RSRP between the terminal and the first equipment is equal to the RSRP threshold, the terminal sends data through the first uplink communication connection or the second uplink communication connection.

3. The method according to claim 1 or 2, wherein the first message further comprises a first physical cell identity, PCI, and a second PCI;

the method further comprises the following steps:

the terminal receives a first Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) sent by the second equipment, wherein the first PSS and the SSS correspond to the first PCI;

the terminal receives a second PSS and a second SSS which are sent by the third equipment and correspond to the second PCI;

the sending, by the terminal, the second message to the second device through the uplink resource of the second device includes:

and if the first PCI strength is greater than the second PCI strength, the terminal sends the second message to the second equipment through uplink resources of the second equipment, wherein the first PCI strength is the signal strength of the first PSS and the SSS, and the second PCI strength is the signal strength of the second PSS and the SSS.

4. The method according to any of claims 1 to 3, wherein the third message or the first message further includes System Frame Number (SFN) information, and the SFN information is used for downlink frame synchronization between the terminal and the second device according to the SFN information.

5. A method for establishing a communication connection, comprising:

a first device sends a first message to a terminal, wherein the first message comprises information of uplink resources of a second device, the uplink resources of the second device are used for the terminal to send a second message to the second device through the uplink resource device of the second device, and the second message is used for obtaining a third message;

and the first equipment sends a third message to the terminal, wherein the third message comprises information of downlink resources of second equipment, and the downlink resources of the second equipment are used for the terminal to establish a first downlink communication connection with the second equipment according to the downlink resources of the second equipment.

6. The method of claim 5, wherein the first message further includes information of a Reference Signal Received Power (RSRP) threshold and an uplink resource of the first device, wherein the uplink resource of the second device is used for the terminal to establish a first uplink communication connection with the second device according to the uplink resource of the second device, wherein the uplink resource of the first device is used for the terminal to establish a second uplink communication connection with the first device according to the uplink resource of the first device, wherein the RSRP threshold is used for sending data, signaling or a random access signal, to the second device through the first uplink communication connection if the RSRP of the terminal and the first device is greater than the RSRP threshold, or used for sending data to the first device through the second uplink communication connection if the RSRP of the terminal and the first device is less than the RSRP threshold, signaling or a random access signal, or if the target RSRP is equal to the RSRP threshold, the terminal sends data, signaling or a random access signal through the first uplink communication connection or the second uplink communication connection.

7. The method according to claim 5 or 6, wherein the first message further comprises a first physical cell identity, PCI, and a second PCI;

the method further comprises the following steps:

the first device sends a first Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) to the terminal, wherein the first PSS and the SSS are used for the terminal to acquire a first PCI strength, the first PSS and the SSS correspond to the first PCI, the first PCI strength is used for the terminal to send a second message to the second device through the uplink resource if the first PCI strength is greater than a second PCI strength, the second PCI strength is obtained by the terminal according to a second PSS and the SSS sent by the second device, and the second PSS and the SSS correspond to the second PCI.

8. The method according to any of claims 5 to 7, wherein the third message or the first message further includes System Frame Number (SFN) information, and the SFN information is used for downlink frame synchronization between the terminal and the second device according to the SFN information.

9. A method for establishing a communication connection, comprising:

the second device receives a second message sent by the terminal through an uplink resource of the second device, wherein the uplink resource of the second device is obtained by the terminal from the first message sent by the first device;

10. The method of claim 9, wherein the first message further includes information of a Reference Signal Received Power (RSRP) threshold and an uplink resource of the first device, wherein the uplink resource of the second device is used for the terminal to establish a first uplink communication connection with the second device according to the uplink resource of the second device, wherein the uplink resource of the first device is used for the terminal to establish a second uplink communication connection with the first device according to the uplink resource of the first device, wherein the RSRP threshold is used for sending data, signaling or a random access signal, to the second device through the first uplink communication connection if the RSRP of the terminal and the first device is greater than the RSRP threshold, or used for sending data to the first device through the second uplink communication connection if the RSRP of the terminal and the first device is less than the RSRP threshold, signaling or a random access signal, or if the target RSRP is equal to the RSRP threshold, the terminal sends data, signaling or a random access signal through the first uplink communication connection or the second uplink communication connection.

11. The method according to claim 9 or 10, wherein the first message further comprises a first physical cell identity, PCI, and a second PCI;

the method further comprises the following steps:

the second device sends a second Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) to the terminal, wherein the second PSS and the SSS are used for the terminal to acquire a second PCI strength, the second PSS and the SSS correspond to the second PCI, the second PCI strength is used for the terminal to send the second message to the second device through the uplink resource if the first PCI strength is greater than the second PCI strength, the first PCI strength is obtained by the terminal according to the first PSS and the SSS sent by the first device, and the first PSS and the SSS correspond to the first PCI.

12. The method according to any of claims 9 to 11, wherein the third message or the first message further includes System Frame Number (SFN) information, and the SFN information is used for downlink frame synchronization between the terminal and the second device according to the SFN information.

13. An apparatus for establishing a communication connection, comprising: a first receiving module, configured to receive a first message sent by a first device, where the first message includes information of an uplink resource of a second device;

a sending module, configured to send a second message to the second device through the uplink resource of the second device;

14. An apparatus for establishing a communication connection, comprising:

a first sending module, configured to send a first message to a terminal, where the first message includes information of an uplink resource of a second device, and the uplink resource of the second device is used for the terminal to send a second message to the second device through the uplink resource of the second device;

15. An apparatus for establishing a communication connection, comprising:

a receiving module, configured to receive a second message sent by a terminal through an uplink resource of a second device, where the uplink resource of the second device is obtained by the terminal from a first message sent by a first device;

16. A terminal, comprising: the device comprises a transceiver and a processor, wherein the transceiver is used for receiving a first message sent by first equipment, and the first message comprises information of uplink resources of second equipment; sending a second message to the second device through the uplink resource of the second device; and receiving a third message sent by the first device, where the third message includes information of a downlink resource of a second device, and the downlink resource of the second device is used for the terminal to establish a first downlink communication connection with the second device according to the downlink resource of the second device.

17. An access network device, comprising: the transceiver is configured to send a first message to a terminal, where the first message includes information of an uplink resource of a second device, the uplink resource of the second device is used for the terminal to send a second message to the second device through the uplink resource of the second device, and the second message is used to obtain the third message; and sending a third message to the terminal, wherein the third message comprises information of downlink resources of second equipment, and the downlink resources of the second equipment are used for establishing a first downlink communication connection between the terminal and the second equipment according to the downlink resources of the second equipment.

18. An access network device, comprising: the transceiver is used for receiving a second message sent by a terminal through an uplink resource of second equipment, wherein the uplink resource of the second equipment is obtained by the terminal from a first message sent by first equipment; the method comprises the steps that a second device sends a confirmation message to a first device, wherein the confirmation message is used for enabling the first device to send a third message to a terminal, the third message comprises information of downlink resources of the second device, and the downlink resources of the second device are used for enabling the terminal to establish first downlink communication connection with the second device according to the downlink resources of the second device.