WO2019109540A1

WO2019109540A1 - Method and device for switching terminal in ultra dense network

Info

Publication number: WO2019109540A1
Application number: PCT/CN2018/079342
Authority: WO
Inventors: 刘强
Original assignee: 海信集团有限公司
Priority date: 2017-12-08
Filing date: 2018-03-16
Publication date: 2019-06-13
Also published as: CN107949015A; CN107949015B

Abstract

The present disclosure discloses a method and a device for switching a terminal in an ultra dense network. The invention resolves the issue of air interface resource allocation when a terminal in a small base station wireless backhaul solution is switched between small base stations. In embodiments of the present disclosure, a primary base station determines a source base station of a terminal or that a target base station has a secondary base station; a first air interface resource used to transmit signaling with the primary base station is allocated for the secondary base station, the primary base station performs a terminal switching operation according to the allocated air interface resource, the secondary base station determines the first air interface resource allocated by the primary base station and used to transmit signaling with the primary base station, and the secondary base station uses the first air interface resource to perform the terminal switching operation. The primary base station allocates a first air interface resource for transmitting signaling with the primary base station to a secondary base station, so as to switch a terminal between base stations in a small base station wireless backhaul solution.

Description

Method and device for terminal switching in ultra-dense network

This application claims the priority of the Chinese Patent Application filed on Dec. 8, 2017, the Chinese Patent Office, Application No. 201711298937.1, and the application entitled "Method and Apparatus for Terminal Switching in an Ultra-Dense Network", the entire contents of which are The citations are incorporated herein by reference.

Technical field

The present disclosure relates to the field of wireless communication technologies, and in particular, to a method and device for performing terminal handover in an ultra-dense network.

Background technique

With the rapid development of wireless communication technology, in order to solve the problem that the mobile network data traffic increases by 1000 times in the future and the user experience rate increases by 10 to 100 times, in addition to increasing spectrum bandwidth and utilizing advanced wireless transmission technologies to improve spectrum utilization, The most effective way to increase the capacity of the wireless system is still to enhance the spatial reuse of the encrypted cell deployment. The traditional wireless communication system usually uses the cell splitting method to reduce the cell radius. However, as the cell coverage is further reduced, cell splitting will be difficult. It is necessary to densely deploy small base stations in indoor and outdoor hotspot areas to form an ultra-dense networking.

Summary of the invention

The disclosure provides a method for performing terminal handover in an ultra-dense network, including:

The primary base station determines that the source base station or the target base station of the terminal has a secondary base station;

The primary base station allocates a first air interface resource for transmitting signaling to the primary base station, so that the secondary base station performs a terminal handover operation according to the allocated first air interface resource;

The primary base station is a base station capable of directly communicating with a core network, and the secondary base station is a base station that needs to communicate with a core network through a primary base station.

The disclosure also provides a method for performing terminal handover in an ultra-dense network, including:

Determining, by the base station, a first air interface resource allocated by the primary base station for transmitting signaling with the primary base station, where the secondary base station is a source base station or a target base station that performs handover by the terminal;

The slave base station performs the terminal switching operation by using the first air interface resource;

The embodiment of the present disclosure further provides a primary base station for performing terminal handover in an ultra-dense network, the primary base station includes: a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer in the memory The program to achieve:

Determining that the source base station or the target base station of the terminal has a slave base station; and assigning, to the slave base station, a first air interface resource for transmitting signaling with the primary base station, so that the slave base station according to the allocated first air interface resource Perform terminal switching operations.

An embodiment of the present disclosure further provides a slave base station for performing terminal handover in an ultra-dense network, the slave base station including: a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer in the memory The program to achieve:

Determining, by the primary base station, a first air interface resource for transmitting signaling with the primary base station, where the secondary base station is a source base station or a target base station that performs handover, and uses the first air interface resource to perform a terminal handover operation.

The embodiment of the present disclosure further provides an apparatus for performing terminal handover in an ultra-dense network, where the apparatus includes a first processing module and a first transmission module:

a first processing module, configured to determine that the source base station of the terminal or the target base station has a secondary base station;

a first transmission module, configured to allocate, by the slave base station, a first air interface resource for transmitting signaling with the primary base station, so that the slave base station performs a terminal handover operation according to the allocated first air interface resource.

The embodiment of the present disclosure further provides an apparatus for performing terminal handover in an ultra-dense network, where the apparatus includes a second transmission module and a second processing module:

a second transmission module, configured to determine a first air interface resource allocated by the primary base station for transmitting signaling with the primary base station, where the secondary base station is a source base station or a target base station that performs handover by the terminal;

The second processing module is configured to perform a terminal switching operation by using the first air interface resource.

The embodiment of the present disclosure further provides a computer storage medium on which a computer program is stored, and when the program is executed by the processor, the method for performing terminal switching in the ultra-dense network by the primary base station side is implemented.

Embodiments of the present disclosure also provide a computer storage medium having stored thereon a computer program that, when executed by a processor, implements the method of performing terminal switching in an ultra-dense network from a base station side.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings will be briefly described in the description of the embodiments, and the accompanying drawings in the following description are only Those skilled in the art can also obtain other drawings based on these drawings without paying for inventive labor.

1 is a schematic structural diagram of a system for performing terminal handover in an ultra-dense network according to an embodiment of the present disclosure;

2 is a schematic diagram of a backhaul link between a primary base station and a secondary base station in an ultra-dense network according to an embodiment of the present disclosure;

3 is a schematic diagram of a backhaul link of a terminal switching from a base station to a primary base station in an ultra-dense network according to an embodiment of the present disclosure;

4 is a schematic diagram of a backhaul link of a terminal switching from a primary base station to a secondary base station in an ultra-dense network according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a first primary base station according to an embodiment of the present disclosure;

6 is a schematic structural diagram of a first slave base station according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a second primary base station according to an embodiment of the present disclosure;

8 is a schematic structural diagram of a second slave base station according to an embodiment of the present disclosure;

FIG. 9 is a schematic flowchart of a method of a primary base station side in a method for performing terminal handover in an ultra-dense network according to an embodiment of the present disclosure;

10 is a schematic flowchart of a method from a base station side in a method for performing terminal handover in an ultra-dense network according to an embodiment of the present disclosure;

11 is a schematic flowchart of a complete method for performing terminal handover in an ultra-dense network according to an embodiment of the present disclosure, where the source base station is a slave base station and the target base station is a master base station;

12 is a schematic flowchart of a complete method for performing terminal handover in an ultra-dense network in which the target base station is a secondary base station and the source base station is a primary base station.

Detailed ways

In the ultra-dense networking, the deployment of the small and medium-sized base stations has high requirements on the site, which is mainly reflected in the requirements of the transmission resources. If the deployment structure of the macro base station is effectively returned, a large amount of optical fiber resources need to be deployed. It is impossible to achieve. However, the plug-and-play of small base stations makes wireless backhaul that is easy to deploy flexibly an effective way to solve the limitation of transmission resources. If the small base station adopts a wireless backhaul scheme, the existing handover mechanism suitable for optical fiber transmission needs to become a corresponding handover mechanism adapted to wireless backhaul.

However, there is no clear solution on how to implement the handover mechanism designed by the small base station using the wireless backhaul scheme to realize the allocation of air interface resources.

The present disclosure provides a method and device for performing terminal handover in an ultra-dense network, which is used to implement a problem of how to allocate air interface resources of a handover mechanism of a wireless backhaul small base station.

In the embodiment of the present disclosure, the primary base station determines that the source base station or the target base station of the terminal has a secondary base station, and the primary base station allocates a first air interface resource for transmitting signaling with the primary base station, and the primary base station performs terminal according to the allocated air interface resource. The switching operation determines, from the base station, the first air interface resource allocated by the primary base station for transmitting signaling with the primary base station, and the base station uses the first air interface resource to perform the terminal switching operation. In the embodiment of the present disclosure, the primary base station allocates a first air interface resource for transmitting signaling with the primary base station, so that the terminal in the small base station wireless backhaul scheme switches between the base stations.

The present disclosure will be further described in detail with reference to the accompanying drawings, in which FIG. . All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without departing from the inventive scope are the scope of the disclosure.

The embodiments of the present disclosure are further described in detail below with reference to the accompanying drawings.

As shown in FIG. 1 , the system for performing handover in the embodiment of the present disclosure includes: a primary base station 10 and a secondary base station 20.

The primary base station 10 is configured to determine that the source base station or the target base station of the terminal has a secondary base station, and allocate, by the secondary base station, a first air interface resource for transmitting signaling with the primary base station, so that the secondary base station according to the allocated The first air interface resource performs a terminal switching operation.

The slave base station 20 is configured to determine a first air interface resource allocated by the primary base station for transmitting signaling with the primary base station, and use the first air interface resource to perform a terminal handover operation.

The primary base station in the embodiment of the present disclosure is a base station capable of directly communicating with the core network, and the secondary base station is a base station that needs to communicate with the core network through the primary base station. For example, the primary base station may be a macro base station or a micro base station, and the secondary base station may be a wireless small base station.

The primary base station belongs to the base station of the primary backhaul layer, and the secondary base station belongs to the base station of the secondary return layer, as shown in FIG. 2 . In Figure 2, there is a backhaul link between the primary base station and the secondary base station.

The primary base station determines that the source base station or the target base station of the terminal includes two cases. First, the source base station that performs handover is the secondary base station, the target base station is the primary base station, and second, the target base station that the terminal performs handover is From the base station, the source base station is the primary base station, and the following two cases are respectively described.

Scenario 1: The source base station that the terminal performs handover is the slave base station, and the target base station is the master base station.

The slave base station configures measurement control information for accessing the terminal of the slave base station according to the area restriction information.

The measurement control information mainly includes an object to be measured by the terminal, a cell list, a report mode, a measurement identifier, and an event parameter.

The information herein may be any information that reflects the quality of the terminal, such as RSRP (Reference Signal Receiving Power) measurement information, and RSRQ (Reference Signal Receiving Quality) measurement information.

In an implementation, the base station may send measurement control information to the terminal through an RRC (Radio Resource Control) reconfiguration message to implement configuration. Of course, the measurement control information can also be sent to the terminal through other messages.

Optionally, after receiving the measurement control information sent by the base station, the terminal performs measurement configuration according to the measurement control information to obtain measurement information, and sends the measurement information to the secondary base station.

In an implementation, the terminal may perform measurement configuration according to the measurement control information through the RRC layer.

If the measurement control information is sent from the base station to the terminal through the RRC reconfiguration message, the terminal may send the measurement information to the secondary base station through the RRC reconfiguration complete message.

After receiving the measurement information sent by the terminal from the base station, it is determined that the handover is performed at the master-slave base station according to the measurement information and the known slave base station information of the base station.

For example, as shown in FIG. 3, the slave base station 1 belongs to the primary base station 1. Determining, by the base station, whether the terminal needs to perform handover according to the measurement information, and if it is determined that the terminal needs to perform handover, further determining, according to the known subordinate base station information of the base station, whether the target base station that the terminal handover is the primary base station 1 to which the terminal belongs, and if so, to The primary base station 1 applies for resources.

Specifically, if it is determined by the base station that the handover is performed by the primary and secondary base stations, the secondary base station applies to the primary base station for the first air interface resource for transmitting signaling with the primary base station.

Correspondingly, after receiving the message from the base station for transmitting the first air interface resource with the primary base station, the primary base station allocates a first air interface resource for transmitting signaling with the primary base station.

Specifically, the first air interface resource used for transmitting signaling with the primary base station is an unused downlink time-frequency resource.

Optionally, the primary base station may notify the secondary base station of the first air interface resource allocated to the secondary base station by using an application success message.

After receiving the first air interface resource notified by the primary base station, the base station sends a handover request message to the primary base station by using the first air interface resource, indicating that the primary base station is ready to perform handover.

After receiving the handover request message sent by the base station, the primary base station performs a resource admission operation.

The purpose of the resource access operation here is to allocate new air interface resources for the access of the terminal.

Specifically, the following two processes are included.

1. The primary base station is a SAE (System Architecture Evolution) bearer resource that allocates services from the base station.

2. The primary base station allocates new air interface resources to the accessed terminal.

After the primary base station resource admission operation is completed, the handover confirmation message is sent to the secondary base station through the first air interface resource to notify the base station resource allocation completion.

Optionally, after receiving the handover confirmation message from the base station, the terminal is instructed to initiate the handover, for example, the base station may instruct the terminal to initiate the handover by using an RRC reconfiguration message.

The terminal initiates a handover and notifies the secondary base station after accessing the primary base station. Here, if the terminal instructs the terminal to initiate the handover through the RRC reconfiguration message, the terminal transmits an RRC reconfiguration complete message to the secondary base station to notify the base station terminal to access the primary base station.

After determining that the terminal accesses the primary base station, the secondary station releases the air interface resource occupied by the terminal in the secondary base station and the first air interface resource used for transmitting signaling with the primary base station.

Optionally, after the terminal accesses the primary base station, the primary base station releases the air interface resources for performing wireless backhaul with the secondary base station.

Here, the air interface resource for performing wireless backhaul is an air interface resource for information transmission between the primary base station and the secondary base station when the terminal accesses the secondary base station.

Scenario 2: The source base station to which the terminal performs handover is the primary base station, and the target base station is the secondary base station.

The primary base station configures measurement control information for accessing the terminal of the secondary base station according to the area restriction information.

The information here may be any information that reflects the quality of the terminal reception, such as RSRP measurement information, RSRQ measurement information.

In an implementation, the primary base station may send measurement control information to the terminal through an RRC reconfiguration message, thereby implementing configuration. Of course, the measurement control information can also be sent to the terminal through other messages.

Optionally, after receiving the measurement control information sent by the primary base station, the terminal performs measurement configuration according to the measurement control information to obtain measurement information, and sends the measurement information to the primary base station.

If the primary base station sends the measurement control information to the terminal through the RRC reconfiguration message, the terminal may send the measurement information to the primary base station by using the RRC reconfiguration complete message.

After receiving the measurement information sent by the terminal, the primary base station determines, according to the measurement information and the known secondary base station information of the primary base station, that the handover is performed between the primary and secondary base stations.

For example, as shown in FIG. 4, the slave base station of the primary base station 1 has the slave base station A and the slave base station B, and determines that handover is required according to the measurement information transmitted by the terminal to the master base station 1, and the target base station is the slave base station B.

The master base station 1 can know all the slave base stations that are known to belong to the master base station 1 according to the known slave base station information of the master base station, and the master base station 1 determines whether the terminal needs to perform handover according to the measurement information, and if it is determined that the terminal needs to perform handover, further according to The known subordinate base station information of the primary base station determines whether the handover target base station is a secondary base station belonging to the primary base station, and if so, if the target base station is the secondary base station B, the primary base station 1 allocates resources from the base station B.

Specifically, if the primary base station determines that the handover is to be performed at the primary and secondary base stations, the primary base station allocates, for the primary air interface resource for transmitting signaling with the primary base station, and the wireless backhaul for the primary base station and the secondary base station. Two air outlet resources.

After the primary base station allocates the first air interface resource and the second air interface resource, the primary base station sends a handover request message to the secondary base station through the first air interface resource, indicating that the secondary base station is ready to perform the handover.

After receiving the handover request message sent by the primary base station, the base station requests the primary base station to perform resource admission operation on the terminal by using the second air interface resource.

The purpose of the resource access operation here is to apply for a new air interface resource for the terminal accessing from the base station.

Specifically, the following two processes are included.

1. Applying, by the base station, the SAE bearer resource of the service to the primary base station through the second air interface resource.

2. After the base station applies for the SAE bearer resource of the service to the primary base station through the second air interface resource, the base station applies for a new air interface resource for the terminal access to the primary base station.

After the base station requests the primary base station to perform the resource admission operation on the terminal, the handover confirmation message is sent through the first air interface resource to notify the primary base station that the resource allocation is completed.

Optionally, after receiving the handover confirmation message, the primary base station instructs the terminal to initiate a handover. For example, the primary base station may instruct the terminal to initiate the handover by using an RRC reconfiguration message.

The terminal initiates a handover and notifies the primary base station after accessing the secondary base station. Here, if the primary base station instructs the terminal to initiate the handover through the RRC reconfiguration message, the terminal sends an RRC reconfiguration complete message to the primary base station to notify the primary base station terminal to access the secondary base station.

After determining that the terminal accesses the secondary base station, the primary base station releases the air interface resource occupied by the terminal at the primary base station and the first air interface resource used for transmitting signaling with the primary base station, and uses the second air interface resource as a backhaul link. The base station transmits service data and control information.

As shown in FIG. 5, an embodiment of the present disclosure provides a primary base station for performing terminal handover in an ultra-dense network, including: a processor 500 and a memory 501, wherein the memory stores a computer program, and the processor executes the A computer program in memory to implement:

Optionally, the processor 500 executes the computer program in the memory by the processor to further implement:

After receiving the message requesting the allocation of the air interface resource from the base station, the source base station determining that the terminal performs the handover is the slave base station.

Optionally, the executing the computer program in the memory by the processor 500 further implements:

Determining whether the terminal switches to the secondary base station according to the measurement information reported by the terminal and the information of the secondary base station that belongs to the primary base station.

After the first air interface resource for transmitting the signaling with the primary base station is allocated by the base station, after the handover request message sent by the secondary base station is received by the first air interface resource, resource access is performed to the terminal. operating;

After the resource admission operation is completed, the handover request acknowledgement message is sent to the slave base station by using the first air interface resource, and the slave base station is used to perform wireless back after the terminal accesses the primary base station. The second air interface resource.

Allocating a second air interface resource for performing wireless backhaul for the slave base station.

Transmitting, by the first air interface resource, a handover request message to the slave base station; after receiving the handover request acknowledgement message sent by the slave base station by using the first air interface resource, instructing the terminal to initiate a handover; switching at the terminal After the slave base station, the air interface resource occupied by the terminal and the first air interface resource are released, and the second air interface resource is used as a resource of the backhaul link.

As shown in FIG. 6 , an embodiment of the present disclosure provides a slave base station for performing terminal handover in an ultra-dense network, including: a processor 600 and a memory 601, where the memory stores a computer program, and the processor executes the A computer program in memory to implement:

And determining, by the primary base station, a first air interface resource for signaling with the primary base station, where the secondary base station is a source base station or a target base station that performs handover, and uses the first air interface resource to perform a terminal handover operation.

Optionally, the executing, by the processor 600, the computer program in the memory further implements:

The target base station that determines that the terminal performs handover according to the measurement information reported by the terminal is the primary base station.

Transmitting, by the first air interface resource, a handover request message to the primary base station; receiving, by using the first air interface resource, a handover request acknowledgement message sent by the primary base station, and releasing the terminal after accessing the primary base station by the terminal The air interface resource occupied by the terminal, the first air interface resource, and the air interface resource used for wireless backhaul between the slave base station and the primary base station.

Determining, by the primary base station, a second air interface resource for performing wireless backhaul;

After receiving the handover request message by the primary base station by using the first air interface resource, performing resource admission operation on the terminal by using the second air interface resource; after the resource admission operation is completed, passing the An air interface resource sends a handover request acknowledgement message to the primary base station, and uses the second air interface resource as a resource of the backhaul link.

As shown in FIG. 7 , an embodiment of the present disclosure provides a device for performing terminal handover in an ultra-dense network, including a first processing module 700 and a first transmission module 701:

The first processing module 700 is configured to determine that the source base station or the target base station of the terminal has a secondary base station;

The first transmission module 701 is configured to allocate a first air interface resource for transmitting signaling to the primary base station, so that the secondary base station performs a terminal switching operation according to the allocated first air interface resource.

Optionally, the first processing module 700 is further configured to:

As shown in FIG. 8 , an embodiment of the present disclosure provides a device for performing terminal handover in an ultra-dense network, including a second transmission module 800 and a second processing module 801:

a second transmission module 800, configured to determine a first air interface resource allocated by the primary base station for signaling with the primary base station, where the secondary base station is a source base station or a target base station that performs handover by the terminal;

The second processing module 801 is configured to perform a terminal switching operation by using the first air interface resource.

Optionally, the second processing module 801 is further configured to:

Embodiments of the present disclosure also provide a computer readable non-volatile storage medium comprising program code for causing the computing device to perform an embodiment of the present disclosure when the program code is run on a computing device The steps of the method for performing terminal handover on the primary base station side in the system.

Embodiments of the present disclosure also provide a computer readable non-volatile storage medium comprising program code for causing the computing device to perform an embodiment of the present disclosure when the program code is run on a computing device The steps of the method for performing terminal handover from the base station side in the system.

Based on the same inventive concept, a method for performing terminal handover in an ultra-dense network is also provided in the embodiment of the present disclosure. The device corresponding to the method is a primary base station in the terminal handover system according to the embodiment of the present disclosure, and the method solves the problem. The principle is similar to the device, so the implementation of the method can be referred to the implementation of the system, and the repeated description will not be repeated.

As shown in FIG. 9, an embodiment of the present disclosure provides a method for performing terminal handover in an ultra-dense network, where the method includes:

Step 900: The primary base station determines that the source base station or the target base station of the terminal has a secondary base station;

Step 901: The primary base station allocates a first air interface resource for transmitting signaling to the primary base station, so that the secondary base station performs a terminal handover operation according to the allocated first air interface resource.

Optionally, the primary base station determines that the source base station or the target base station of the terminal has a secondary base station, and includes:

After receiving the message from the base station requesting allocation of air interface resources, the primary base station determines that the source base station that the terminal performs handover is a secondary base station.

The primary base station determines whether the terminal switches to the secondary base station according to the measurement information reported by the terminal and the information of the secondary base station that belongs to the primary base station.

Optionally, after the primary base station allocates the first air interface resource for transmitting signaling to the primary base station, the primary base station further includes:

After receiving the handover request message sent by the slave base station by using the first air interface resource, the primary base station performs a resource admission operation on the terminal;

After the resource access operation is completed, the primary base station sends a handover request acknowledgement message to the secondary base station by using the first air interface resource, and releases the slave base station after the terminal accesses the primary base station. The second air interface resource for wireless backhaul.

Optionally, the primary base station allocates a first air interface resource for transmitting signaling to the primary base station, and the method includes:

The primary base station allocates, for the secondary base station, a second air interface resource for performing wireless backhaul.

Sending, by the primary base station, a handover request message to the secondary base station by using the first air interface resource;

After receiving the handover request acknowledgement message sent by the slave base station by using the first air interface resource, the primary base station instructs the terminal to initiate a handover;

After the terminal switches to the slave base station, the master base station releases the air interface resource occupied by the terminal and the first air interface resource, and uses the second air interface resource as a resource of the backhaul link.

Based on the same inventive concept, a method for performing terminal handover in an ultra-dense network is also provided in the embodiment of the present disclosure. The device corresponding to the method is a secondary base station in the terminal handover system according to the embodiment of the present disclosure, and the method solves the problem. The principle is similar to the device, so the implementation of the method can be referred to the implementation of the system, and the repeated description will not be repeated.

As shown in FIG. 10, an embodiment of the present disclosure provides a method for performing terminal handover in an ultra-dense network, where the method includes:

Step 1000: Determine, by the base station, a first air interface resource allocated by the primary base station for transmitting signaling with the primary base station, where the secondary base station is a source base station or a target base station that performs handover by the terminal;

Step 1001: The slave base station performs a terminal handover operation by using the first air interface resource.

Optionally, before the determining, by the base station, the first air interface resource that is used by the primary base station to transmit signaling with the primary base station, the method further includes:

The target base station that determines that the terminal performs handover according to the measurement information reported by the base station is the primary base station.

Optionally, the slave base station performs the terminal switching operation by using the first air interface resource, including:

Sending, by the base station, a handover request message to the primary base station by using the first air interface resource;

Receiving, by the first base station, the handover request acknowledgement message sent by the primary base station, and releasing the air interface resource occupied by the terminal, the first air interface, after the terminal accesses the primary base station a resource and an air interface resource for performing wireless backhaul between the slave base station and the primary base station.

Optionally, before the performing, by the base station, the terminal switching operation by using the first air interface resource, the method further includes:

Determining, by the base station, a second air interface resource allocated by the primary base station for performing wireless backhaul;

After receiving the handover request message by the primary base station by using the first air interface resource, the slave base station performs a resource admission operation on the terminal by using the second air interface resource;

After the resource access operation is completed, the slave base station sends a handover request acknowledgement message to the primary base station by using the first air interface resource, and uses the second air interface resource as a resource of the backhaul link.

As shown in FIG. 11, the source base station is a slave base station, and the target base station is a master base station. The embodiment of the present disclosure further provides a complete method for performing terminal handover in an ultra-dense network, where the method includes:

Step 1100: The slave base station sends measurement control information to the terminal by using an RRC reconfiguration message according to the area restriction information.

Step 1101: After receiving the measurement control information sent by the base station, the terminal performs measurement configuration according to the measurement control information by the RRC layer to obtain measurement information.

Step 1102: The terminal sends the measurement information to the secondary base station by using an RRC reconfiguration complete message.

Step 1103: After receiving the measurement information sent by the terminal from the base station, determining, according to the measurement information and the known slave base station information of the base station, that the handover is performed at the master-slave base station;

Step 1104: The base station determines that the handover is performed by the primary and secondary base stations, and applies, by using the air interface resources for performing wireless backhaul for the primary base station and the secondary base station, the first air interface resource for transmitting signaling with the primary base station. ;

Step 1105: The primary base station receives, by using the air interface resource for the wireless backhaul of the primary base station and the secondary base station, the message for the first air interface resource that is used by the base station to transmit signaling with the primary base station, and then allocates the message to the base station. a first air interface resource for transmitting signaling with the primary base station;

Step 1106: After the primary base station successfully allocates the first air interface resource from the base station, the primary base station sends a resource application success message to the secondary base station by using the air interface resource for the primary base station and the secondary base station to perform wireless backhaul.

Step 1107: After receiving the resource application success message sent by the primary base station by using the air interface resource for the primary base station and the secondary base station to perform wireless backhaul, the base station sends a handover request message to the primary base station by using the first air interface resource, indicating that the primary base station is ready to perform Switch

Step 1108: After receiving the handover request message sent by the base station, the primary base station allocates a SAE bearer resource for the service from the base station.

Step 1109: After the primary base station successfully allocates the SAE bearer resources of the service from the base station, allocate a new air interface resource for the terminal access.

Step 1110: After the primary base station successfully allocates a new air interface resource for the access of the terminal, the primary air interface resource sends a handover confirmation message to the secondary base station to notify the secondary base station that the resource allocation is completed.

Step 1111: After receiving the handover confirmation message sent by the primary base station, the base station instructs the terminal to perform handover by using an RRC reconfiguration message.

Step 1112: The terminal initiates handover, and after accessing the primary base station, notifies the secondary base station by using an RRC reconfiguration complete message, and the terminal has accessed the primary base station;

Step 1113: After receiving the reconfiguration complete message sent by the terminal, the base station releases the air interface resource occupied by the terminal in the slave base station, the first air interface resource used for signaling transmission, and performs wireless backhaul for the primary base station and the secondary base station. Air interface resources;

Step 1114: After the terminal accesses the primary base station, the primary base station releases the air interface resources for performing wireless backhaul for the primary base station and the secondary base station.

As shown in FIG. 12, assuming that the target base station is a secondary base station and the source base station is a primary base station, the embodiment of the present disclosure further provides a complete method for performing terminal handover in an ultra-dense network, the method comprising:

Step 1200: The primary base station sends measurement control information to the terminal by using an RRC reconfiguration message according to the area restriction information.

Step 1201: After receiving the measurement control information sent by the primary base station, the terminal performs measurement configuration according to the measurement control information by the RRC layer to obtain measurement information.

Step 1202: Send measurement information to the primary base station by using an RRC reconfiguration complete message;

Step 1203: After receiving the measurement information sent by the terminal, the primary base station determines, according to the measurement information and the information about the secondary base station of the primary base station, that the handover is performed at the primary and secondary base stations;

Step 1204: The primary base station determines that the handover is performed by the primary and secondary base stations, and allocates, for the secondary base station, the first air interface resource for transmitting signaling with the primary base station, and the second air interface for performing wireless backhaul for the primary base station and the secondary base station. Resource

Step 1205: After the primary base station allocates the first air interface resource and the second air interface resource, the primary base station sends a handover request message to the secondary base station through the first air interface resource, indicating that the secondary base station is ready to perform the handover.

Step 1206: After receiving the handover request message sent by the primary base station, the base station applies for the SAE bearer resource of the service to the primary base station by using the second air interface resource.

Step 1207: After receiving the message of the SAE bearer resource of the application service sent by the base station by using the second air interface resource, the primary base station allocates the SAE bearer resource of the service to the base station.

Step 1208: The primary base station returns a service SAE bearer resource application success message to the secondary base station by using the second air interface resource.

Step 1209: After receiving the SAE bearer resource application success message from the second air interface resource, the second air interface resource is used by the second air interface resource to apply for a new air interface resource to the primary base station.

Step 1210: After receiving the message for applying for the new air interface resource sent by the base station, the primary base station allocates a new air interface resource to the base station by using the second air interface resource.

Step 1211: The primary base station returns an air interface resource application success message to the secondary base station by using the second air interface resource.

Step 1212: After receiving the air interface resource application success message sent by the primary base station, the second air interface resource sends a handover confirmation message to the primary base station through the first air interface resource.

Step 1213: After receiving the handover confirmation message sent by the base station by using the first air interface resource, the primary base station instructs the terminal to perform handover by using an RRC reconfiguration message.

Step 1214: The terminal initiates handover, and after accessing the secondary base station, sends an RRC reconfiguration complete message to the primary base station to notify the primary base station terminal to access the secondary base station.

Step 1215: After receiving the RRC reconfiguration complete message, the primary base station releases the air interface resource occupied by the terminal at the primary base station and the first air interface resource used for transmitting signaling with the primary base station, and uses the second air interface resource as the backhaul. The link transmits service data and control information to the slave base station.

The present application has been described above with reference to block diagrams and/or flowchart illustrations of a method, apparatus (system) and/or computer program product according to embodiments of the present application. It will be understood that one block of the block diagrams and/or flowchart illustrations and combinations of blocks of the block diagrams and/or flowchart illustrations can be implemented by computer program instructions. These computer program instructions may be provided to a general purpose computer, a processor of a special purpose computer, and/or other programmable data processing apparatus to produce a machine such that instructions for execution via a computer processor and/or other programmable data processing apparatus are created for A method of implementing the functions/actions specified in the block diagrams and/or flowchart blocks.

Accordingly, the application can also be implemented in hardware and/or software (including firmware, resident software, microcode, etc.). Still further, the application can take the form of a computer program product on a computer usable or computer readable storage medium having computer usable or computer readable program code embodied in a medium for use by an instruction execution system or Used in conjunction with the instruction execution system. In the context of the present application, a computer usable or computer readable medium can be any medium that can contain, store, communicate, communicate, or transport a program for use by an instruction execution system, apparatus or device, or in conjunction with an instruction execution system, Used by the device or device.

It will be apparent to those skilled in the art that various changes and modifications can be made in the present disclosure without departing from the spirit and scope of the disclosure. Thus, it is intended that the present invention cover the modifications and the modifications

Claims

A method for performing terminal handover in an ultra-dense network, the method comprising:

The primary base station determines that the source base station or the target base station of the terminal has a secondary base station;

The primary base station allocates a first air interface resource for transmitting signaling to the primary base station, so that the secondary base station performs a terminal handover operation according to the allocated first air interface resource;

The primary base station is a base station capable of directly communicating with a core network, and the secondary base station is a base station that needs to communicate with a core network through a primary base station.
The method according to claim 1, wherein the primary base station determines that the source base station or the target base station of the terminal has a secondary base station, and includes:

After receiving the message from the base station requesting allocation of air interface resources, the primary base station determines that the source base station that the terminal performs handover is a secondary base station.
The method according to claim 1, wherein the primary base station determines that the source base station or the target base station of the terminal has a secondary base station, and includes:

The primary base station determines whether the terminal switches to the secondary base station according to the measurement information reported by the terminal and the information of the secondary base station that belongs to the primary base station.
The method according to claim 2, wherein after the primary base station allocates the first air interface resource for transmitting signaling to the primary base station, the primary base station further includes:

After receiving the handover request message sent by the slave base station by using the first air interface resource, the primary base station performs a resource admission operation on the terminal;

After the resource access operation is completed, the primary base station sends a handover request acknowledgement message to the secondary base station by using the first air interface resource, and releases the slave base station after the terminal accesses the primary base station. The second air interface resource for wireless backhaul.
The method according to claim 3, wherein the primary base station allocates, for the first base station, the first air interface resource for transmitting signaling with the primary base station, and further includes:

The primary base station allocates, for the secondary base station, a second air interface resource for performing wireless backhaul.
The method according to claim 4 or 5, wherein after the primary base station allocates the first air interface resource for transmitting signaling to the primary base station, the primary base station further includes:

Sending, by the primary base station, a handover request message to the secondary base station by using the first air interface resource;

After receiving the handover request acknowledgement message sent by the slave base station by using the first air interface resource, the primary base station instructs the terminal to initiate a handover;

After the terminal switches to the slave base station, the master base station releases the air interface resource occupied by the terminal and the first air interface resource, and uses the second air interface resource as a resource of the backhaul link.
A method for performing terminal handover in an ultra-dense network, the method comprising:

Determining, by the base station, a first air interface resource allocated by the primary base station for transmitting signaling with the primary base station, where the secondary base station is a source base station or a target base station that performs handover by the terminal;

The slave base station performs the terminal switching operation by using the first air interface resource;

The primary base station is a base station capable of directly communicating with a core network, and the secondary base station is a base station that needs to communicate with a core network through a primary base station.
The method according to claim 7, wherein the determining, by the base station, before the first air interface resource allocated by the primary base station for transmitting signaling with the primary base station, further includes:

The target base station that determines that the terminal performs handover according to the measurement information reported by the base station is the primary base station.
The method according to claim 7 or 8, wherein the slave base station performs the terminal handover operation by using the first air interface resource, including:

Sending, by the base station, a handover request message to the primary base station by using the first air interface resource;

Receiving, by the first base station, the handover request acknowledgement message sent by the primary base station, and releasing the air interface resource occupied by the terminal, the first air interface, after the terminal accesses the primary base station a resource and an air interface resource for performing wireless backhaul between the slave base station and the primary base station.
The method according to claim 7, wherein the slave base station further comprises: before the terminal switching operation by using the first air interface resource:

The slave base station determines a second air interface resource allocated by the primary base station for performing wireless backhaul.
The method according to claim 7 or 10, wherein the slave base station performs the terminal handover operation by using the first air interface resource, including:

After receiving the handover request message by the primary base station by using the first air interface resource, the slave base station performs a resource admission operation on the terminal by using the second air interface resource;

After the resource access operation is completed, the slave base station sends a handover request acknowledgement message to the primary base station by using the first air interface resource, and uses the second air interface resource as a resource of the backhaul link.
A primary base station for performing terminal handover in an ultra-dense network, wherein the primary base station includes: a processor and a memory, wherein the memory stores a computer program, and the processor executes a computer program in the memory to achieve:

Determining that the source base station or the target base station of the terminal has a slave base station; and assigning, to the slave base station, a first air interface resource for transmitting signaling with the primary base station, so that the slave base station according to the allocated first air interface resource Perform terminal switching operations.
The primary base station according to claim 12, wherein said computer executing said computer program in said memory further implements:

After receiving the message requesting the allocation of the air interface resource from the base station, the source base station determining that the terminal performs the handover is the slave base station.
The primary base station according to claim 12, wherein said computer executing said computer program in said memory further implements:

Determining whether the terminal switches to the secondary base station according to the measurement information reported by the terminal and the information of the secondary base station that belongs to the primary base station.
The primary base station of claim 13 wherein said processor executing said computer program in said memory further implements:

After the first air interface resource for transmitting the signaling with the primary base station is allocated by the base station, after the handover request message sent by the secondary base station is received by the first air interface resource, resource access is performed to the terminal. operating;

After the resource admission operation is completed, the handover request acknowledgement message is sent to the slave base station by using the first air interface resource, and the slave base station is used to perform wireless back after the terminal accesses the primary base station. The second air interface resource.
The primary base station according to claim 14, wherein said computer executing said computer program in said memory further implements:

Allocating a second air interface resource for performing wireless backhaul for the slave base station.
The primary base station according to claim 15 or 16, wherein said processor executing said computer program in said memory further implements:

Transmitting, by the first air interface resource, a handover request message to the slave base station; after receiving the handover request acknowledgement message sent by the slave base station by using the first air interface resource, instructing the terminal to initiate a handover; switching at the terminal After the slave base station, the air interface resource occupied by the terminal and the first air interface resource are released, and the second air interface resource is used as a resource of the backhaul link.
A slave base station for performing terminal handover in an ultra-dense network, wherein the slave base station includes: a processor and a memory, wherein the memory stores a computer program, and the processor executes a computer program in the memory to achieve:

Determining, by the primary base station, a first air interface resource for transmitting signaling with the primary base station, where the secondary base station is a source base station or a target base station that performs handover, and uses the first air interface resource to perform a terminal handover operation.
The slave base station according to claim 18, wherein said computer executing said computer program in said memory further implements:

The target base station that determines that the terminal performs handover according to the measurement information reported by the terminal is the primary base station.
A slave base station according to claim 18 or 19, wherein said processor executing said computer program in said memory further implements:

Transmitting, by the first air interface resource, a handover request message to the primary base station; receiving, by using the first air interface resource, a handover request acknowledgement message sent by the primary base station, and releasing the terminal after accessing the primary base station by the terminal The air interface resource occupied by the terminal, the first air interface resource, and the air interface resource used for wireless backhaul between the slave base station and the primary base station.
The slave base station according to claim 18, wherein said computer executing said computer program in said memory further implements:

Determining a second air interface resource allocated by the primary base station for performing wireless backhaul.
A slave base station according to claim 18 or 21, wherein said processor executing said computer program in said memory further implements:

After receiving the handover request message by the primary base station by using the first air interface resource, performing resource admission operation on the terminal by using the second air interface resource; after the resource admission operation is completed, passing the An air interface resource sends a handover request acknowledgement message to the primary base station, and uses the second air interface resource as a resource of the backhaul link.
A computer storage medium having stored thereon a computer program, characterized in that the program, when executed by a processor, implements the steps of the method of any of claims 1-4.
A computer storage medium having stored thereon a computer program, characterized in that the program, when executed by a processor, implements the steps of the method of any of claims 5-7.