CN102316540A - Method and system for access control in handover - Google Patents

Abstract

The invention discloses a method for access control in handover. The method comprises that: a source network side transmits handover signaling to a target network side, wherein the handover signaling comprises the throughput of user equipment in a source cell; and after receiving the handover signaling, the target network side executes the access control according to the throughput of the user equipment in the source cell or a quality of service parameter of a radio access bearer. The invention also discloses a system for the access control in the handover. The system comprises an access control unit, wherein the access control unit is used for executing the access control according to the throughput of the user equipment in the source cell or the quality of service parameter of the radio access bearer under the condition of receiving the handover signaling from the source network side by the target network side; and the throughput of the user equipment in the source cell is carried in the handover signaling. By the method and the system provided by the invention, the access control can be performed according to the actual service needs of the user equipment (UE), thereby avoiding influence on the experiences of a user.

Description

Access control method and system during handover

technical field

The present invention relates to the control technology at the time of handover, in particular to an access control method and system at the time of handover.

Background technique

In a mobile communication system, in order to meet the mobility requirements, after the user equipment (UE, UserEquipment) establishes a connection with the network in the serving cell, that is, the source cell, the UE still needs to measure the signal quality of its serving cell and neighboring cells, so that Select a more suitable cell for handover. During the handover process, the target cell needs to perform access control on the UE, and allow the UE's handover request if resources permit. EUTRAN, Evolved Universal Terrestrial Radio Access Network) as an example, the switching process in Figure 1 includes the following steps:

Step 101, the UE in the connected state in the serving cell, that is, the source cell, performs measurement according to the measurement configuration. When the UE detects a neighboring cell that meets the reporting conditions, the UE reports a measurement report to the source base station to which the source cell belongs.

Here, the measurement report refers to a measurement report in which the signal quality of the neighboring cell is higher than a predetermined offset of the serving cell, or a measurement report in which the signal quality of the neighboring cell is higher than a predetermined threshold.

In step 102, the source base station to which the source cell belongs makes a handover decision after receiving the measurement report, and needs to handover the UE to the adjacent base station, that is, the target cell where the target base station is located, and the source base station sends a handover request to the target base station.

Here, there is an X2 interface between the source base station and the target base station. The handover request includes the quality of service (QoS, Quality of Service) parameter of the radio access bearer (E-RAB, E-UTRAN Radio Access Bearer) established by the UE.

Step 103, after receiving the handover request, the target base station performs access control according to the QoS parameters contained in the handover request, and allows the handover of the UE if resources are allowed, and allocates resources for the UE.

Step 104, the target base station sends a handover request acknowledgment to the source base station, including allocated resource information.

Step 105, after receiving the confirmation of the handover request, the source base station sends a handover command to the UE.

Here, in the existing LTE system, the source base station sends a handover command to the UE through an RRC connection reconfiguration message carrying mobility control information (mobilityControlInfo).

In step 106, the UE obtains synchronization with the target cell, initiates random access in the target cell, and sends a handover completion signaling to the target base station. So far, the UE is handed over to the target cell.

In step 103 of the above handover process, when the target base station implements access control according to the QoS parameters of the E-RAB established by the UE, the QoS parameters include QoS class identifier (QCI, QoS Class Identifier), allocation and reservation priority (ARP, Allocation and Retention Priority). If the E-RAB established by the UE is a guaranteed bit rate (GBR, Guaranteed Bit Rate) service, the QoS parameters also need to include the uplink GBR and downlink GBR, as well as the uplink and downlink maximum bit rate (MBR, Maximum Bit Rate), The maximum bit rate may be greater than or equal to the GBR. Wherein, the GBR may also be called a guaranteed bit rate; the MBR may also be called a maximum bit rate.

In the prior art, the actual throughput of the UE in the source cell is not considered when the target base station implements access control, resulting in the following problems:

One situation is: when the target base station finds that the UE is establishing a GBR service, it needs to implement access control according to GBR, and since the actual throughput of the UE in the source cell is not considered in this access control process, here The Throughput can also be understood as traffic. Therefore, if the actual throughput of the UE exceeds the GBR, the target base station can only implement access control according to the GBR and allocate resources for the UE. The resulting problem is: the service rate of the UE after handover It is greatly reduced, which affects the user experience; another situation is: if the target base station finds that the UE has established a non-GBR service, because the target base station does not consider the actual throughput of the UE in the source cell and implements access control, the resulting problem is : Too many or too few resources are allocated or reserved for the UE. When too many resources are allocated to the UE, resources will be wasted, and too few resources are allocated to the UE. The service rate of the UE will be greatly reduced after handover , will also affect the user experience. In a word, when implementing access control in the prior art, since the actual throughput of the UE in the source cell is not considered, the access control cannot be performed according to the actual service requirements of the UE, thus affecting user experience. An improved access control scheme is urgently needed at present.

Contents of the invention

In view of this, the main purpose of the present invention is to provide an access control method and system during handover, which can perform access control according to the actual service requirements of the UE, so as not to affect user experience.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

An access control method during handover, the method comprising:

The source network side sends handover signaling to the target network side; the handover signaling includes the throughput of the user equipment in the source cell;

After receiving the handover signaling, the target network side implements access control according to the throughput of the user equipment in the source cell or the QoS parameter of the radio access bearer.

Wherein, the throughput of the user equipment in the source cell includes: the uplink throughput of the user equipment in the source cell, and/or the downlink throughput of the user equipment in the source cell.

Wherein, the uplink throughput of the user equipment in the source cell includes: the quotient of the total data packet capacity received by the user equipment divided by the time length for receiving the data packet sent by the user equipment, or the average data packet received by the user equipment within a period of time Package capacity.

Wherein, the downlink throughput of the user equipment in the source cell includes: the quotient of the total data packet capacity sent to the user equipment divided by the length of time for sending data packets to the user equipment, or the average data packet sent to the user equipment within a period of time capacity.

Wherein, the period of time is configured by default by the protocol or configured by the source network side.

Wherein, the method further includes: allocating or reserving resources for the user equipment when implementing the access control according to the throughput of the user equipment in the source cell or the quality of service parameter of the radio access bearer.

Wherein, when the throughput of the user equipment in the source cell is less than or equal to the guaranteed bit rate or the maximum bit rate in the quality of service parameter of the radio access bearer, when the access control is performed, the user Allocating or reserving resources by the device specifically includes: the target network implements access control according to the throughput of the user equipment in the source cell, and allocates or reserves resources for the user equipment; or,

When the throughput of the user equipment in the source cell is greater than the guaranteed bit rate in the quality of service parameter of the radio access bearer, the allocating or reserving resources for the user equipment when implementing the access control specifically includes: the target The network side implements access control according to the quality of service parameters of the radio access bearer, and if resources permit, allocate or reserve resources for the user equipment based on the throughput of the user equipment in the source cell; or,

When the quality of service parameters of the radio access bearer in the handover signaling do not include the guaranteed bit rate and the maximum bit rate, the allocating or reserving resources for the user equipment when implementing the access control specifically includes: the target network The side implements access control according to the throughput of the user equipment in the source cell, and allocates or reserves resources for the user equipment; or,

When the target cell included in the handover signaling cannot satisfy the throughput of the user equipment in the source cell, the allocating or reserving resources for the user equipment when implementing the access control specifically includes: the target network side Selecting for the user equipment a target cell that meets the throughput requirements of the user equipment in the source cell; or,

When the throughput of the user equipment in the source cell is greater than the guaranteed bit rate in the quality of service parameter of the radio access bearer, allocating or reserving resources for the user equipment when implementing the access control specifically includes : The target network side implements access control according to the throughput of the user equipment in the source cell, and allocates or reserves resources for the user equipment.

An access control system during handover, the system includes: an access control unit, configured to, when the target network side receives handover signaling from the source network side, according to the throughput of the user equipment in the source cell, or The quality of service parameter of the radio access bearer implements access control; wherein, the throughput of the user equipment in the source cell is included in the handover signaling.

Wherein, the throughput of the user equipment in the source cell includes: the uplink throughput of the user equipment in the source cell, and/or the downlink throughput of the user equipment in the source cell.

Wherein, the uplink throughput of the user equipment in the source cell includes: the quotient of the total data packet capacity received by the user equipment divided by the time length for receiving the data packet sent by the user equipment, or the average data packet received by the user equipment within a period of time Package capacity.

Wherein, the downlink throughput of the user equipment in the source cell includes: the quotient of the total data packet capacity sent to the user equipment divided by the length of time for sending data packets to the user equipment, or the average data packet sent to the user equipment within a period of time capacity.

Wherein, the period of time is configured by default by the protocol or configured by the source network side.

Wherein, the access control unit is further configured to allocate or reserve resources for the user equipment when implementing the access control according to the throughput of the user equipment in the source cell or the quality of service parameter of the radio access bearer.

Wherein, the access control unit is further configured to: when the throughput of the user equipment in the source cell is less than or equal to the guaranteed bit rate or maximum bit rate in the quality of service parameter of the radio access bearer, the target The network side implements access control according to the throughput of the user equipment in the source cell, and allocates or reserves resources for the user equipment; or,

When the throughput of the user equipment in the source cell is greater than the guaranteed bit rate in the quality of service parameter of the radio access bearer, the target network side implements access control according to the quality of service parameter of the radio access bearer, and if resources allow In this case, allocate or reserve resources for the user equipment based on the throughput of the user equipment in the source cell; or,

When the quality of service parameters of the radio access bearer in the handover signaling do not include the guaranteed bit rate and the maximum bit rate, the target network side implements access control according to the throughput of the user equipment in the source cell, and provides allocate or reserve resources; or,

When the target cell included in the handover signaling cannot meet the throughput of the user equipment in the source cell, the target network side selects for the user equipment a target cell that meets the throughput requirements of the user equipment in the source cell; or,

When the throughput of the user equipment in the source cell is greater than the guaranteed bit rate in the quality of service parameter of the radio access bearer, allocating or reserving resources for the user equipment when implementing the access control specifically includes : The target network side implements access control according to the throughput of the user equipment in the source cell, and allocates or reserves resources for the user equipment.

In the present invention, the source network side sends handover signaling to the target network side; the handover signaling includes the throughput of the user equipment in the source cell; after the target network side receives the handover signaling, according to the throughput of the user equipment in the source cell, or The QoS parameter of the access bearer implements access control.

With the present invention, considering the actual throughput of the user equipment in the source cell, since the access control is implemented according to the throughput of the user equipment in the source cell or the quality of service parameters of the radio access bearer, it can be based on the actual throughput of the UE. Access control is performed according to business requirements, so as not to affect user experience.

Description of drawings

FIG. 1 is a schematic diagram of a UE handover process in an LTE system in the prior art;

FIG. 2 is a schematic diagram of a switching process according to Embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of a switching process in Embodiment 2 of the present invention;

FIG. 4 is a schematic diagram of a handover process according to Embodiment 3 of the present invention.

Detailed ways

The basic idea of the present invention is: the source network side sends handover signaling to the target network side; the handover signaling includes the throughput of the user equipment in the source cell; after the target network side receives the handover signaling, it The traffic, or the quality of service parameters of the radio access bearer implement access control.

The implementation of the technical solution will be further described in detail below in conjunction with the accompanying drawings.

In the solution of the present invention, since the actual throughput of the UE in the source cell is taken into consideration, access control can be performed according to the actual service requirements of the UE, thereby not affecting user experience. Access control can be performed according to the actual service requirements of the UE, so resource allocation for the UE during access control is more reasonable and more in line with the user's time service requirements, thereby greatly improving user experience.

An access control method during handover, the method mainly includes the following contents:

The handover signaling sent from the source network side to the target network side includes the throughput of the UE in the source cell. parameter implements access control. Here, the throughput of the UE in the source cell refers to the actual throughput of the UE in the source cell, which will not be described in detail.

Further, when implementing the access control according to the throughput of the UE in the source cell or the QoS parameters of the E-RAB, resources are allocated or reserved for the UE.

Further, the throughput of the UE in the source cell includes: the uplink throughput of the UE in the source cell, and/or the downlink throughput of the UE in the source cell.

Further, the uplink throughput of the UE in the source cell includes: the quotient of the total data packet capacity sent by the receiving UE divided by the time length of the data packet sent by the receiving UE, or the average data packet capacity received by the UE within a period of time.

Further, the downlink throughput of the UE in the source cell includes: the quotient of the total data packet capacity sent to the UE divided by the time length for sending data packets to the UE, or the average data packet capacity sent to the UE within a period of time.

Further, the period of time is configured by default by the protocol or configured by the source network side.

Further, when implementing access control based on the throughput of the UE in the source cell or the QoS parameters of the E-RAB, allocating or reserving resources for the UE includes the following situations:

Case 1: When the throughput of the UE in the source cell is less than or equal to the guaranteed bit rate or the maximum bit rate in the QoS parameters of the E-RAB, the target network implements access control based on the throughput of the UE in the source cell, according to The throughput of the UE in the source cell allocates or reserves resources for the UE.

Situation 2: When the throughput of the UE in the source cell is greater than the guaranteed bit rate in the QoS parameters of the E-RAB, the target network side implements access control according to the QoS parameters of the E-RAB. The throughput of the UE in the source cell allocates or reserves resources for the UE.

Situation 3: When the QoS parameters of the E-RAB in the handover signaling do not include the guaranteed bit rate and the maximum bit rate, the target network side implements access control according to the throughput of the UE in the source cell, and allocates or reserves a bit rate for the UE. Reserve resources.

Situation 4: When the target cell included in the handover signaling cannot meet the throughput of the UE in the source cell, the target network side selects a target cell for the UE that meets the throughput requirement of the UE in the source cell.

Situation 5: When the throughput of the UE in the source cell is greater than the guaranteed bit rate in the QoS parameter of E-RAB, the target network side implements access control based on the throughput of the UE in the source cell, and based on the throughput of the UE in the source cell The amount allocates or reserves resources for the UE.

Further, for the source network side, in the LTE system, the source network side refers to the source base station; in the WCDMA system, the source network side refers to the source radio network controller.

Further, for the target network side, in the LTE system, the target network side refers to the target base station; in the WCDMA system, the target network side refers to the target radio network controller.

Further, for the handover signaling, in the LTE system, the handover signaling refers to a handover request or a handover requirement; in the WCDMA system, the handover signaling refers to a relocation request or a relocation requirement.

Further, the method further includes: the target network side returns a handover command or a relocation command to the source network side, and the source network side sends a handover command to the UE to trigger the UE to handover to the target cell.

To sum up, with the present invention, the target network side can implement access control according to the actual service requirements of the UE, and allocate resources for the UE during the implementation of access control, thereby avoiding the scenario where the throughput of the UE changes before and after handover, and enhancing the user experience.

In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be described with examples below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

Embodiment one:

In the LTE system, there is an X2 interface between base station 1 and base station 2, and the cells (Cell 1 and Cell 2) under the jurisdiction of base station 1 and the cells under the jurisdiction of base station 2 (Cell 3 and Cell 4) are adjacent to each other. Base station 1 and base station 2 are any two base stations in the LTE system.

The UE is in the connected state in Cell 1 (serving cell, or source cell). The radio access bearer E-RAB established by the UE is a GBR service. The maximum bit rate of the line is 800kbps.

The UE performs measurement in Cell 1 according to the measurement configuration sent by base station 1, and reports the measurement objects that meet the reporting conditions. At a certain moment, the UE reports to base station 1 that the signal quality of adjacent cells (Cell 3 and Cell 4) is higher than that of the serving cell (Cell 1) by a predetermined offset, and base station 1 makes a handover after receiving the measurement report decision, the target cell for handover is Cell 3. The base station 1 needs to consider multiple factors such as the signal quality of the serving cell, the signal quality of the target cell, and the load of the target cell when implementing the handover decision, which belongs to the prior art and will not be described in detail here. In this embodiment, base station 1 is the source base station, and base station 2 is the target base station, and the specific process of handover is shown in Figure 2, including the following steps:

Step 201, the source base station sends a handover request signaling to the target base station.

Here, the handover request signaling includes the identity of the target cell, the identity of the E-RAB established by the UE, QoS parameters, configuration information in the source cell, and the like. In order to realize the present invention, the handover request signaling also carries the throughput of the UE in the source cell. Here, the throughput of the UE in the source cell can also be referred to as the flow of the UE in the source cell. The present invention is not limited to the specific name here, as long as the relevant names that can realize the same function of the present invention are within the protection scope of the present invention , without further details.

Here, after the UE establishes E-RAB, the source base station needs to detect the throughput of the UE all the time. The throughput can be represented by the capacity of data packets sent to the UE (downlink) or received by the UE (uplink) per unit time. For downlink Specifically, it can be expressed as the total data packet capacity (or size) sent to the UE/the time length of the data packet sent to the UE, and the unit is bit/s; for the uplink, it can be specifically expressed as the total data sent by the receiving UE Packet capacity/the length of time for the receiving UE to send data packets, the unit is bit/s. After the source base station detects and obtains the uplink and/or downlink throughput of the UE, it includes this parameter in the handover request, and needs to add a new information element to indicate the uplink and/or downlink throughput of the UE. In this embodiment, the uplink and downlink throughputs of the UE are 600 kbps and 700 kbps respectively. Wherein, the uplink and/or downlink throughput of the UE refers to three situations, namely: the uplink throughput of the UE; the downlink throughput of the UE; the uplink throughput of the UE and the downlink throughput of the UE.

Step 202, after receiving the handover request signaling, the target base station implements access control according to the throughput of the UE in the source cell, and allocates resources for the UE based on the throughput of the UE in the source cell.

Here, since the handover request signaling includes the QoS parameters for establishing E-RAB by the UE and the uplink and downlink throughput of the UE, and the uplink and downlink throughput of the UE are respectively greater than the guaranteed bit rate of the uplink and downlink, the target base station bases the UE on the source cell Access control is implemented based on the throughput of the UE, and resources are allocated or reserved for UEs (including radio resources, hardware resources, and S1 interface transmission layer bandwidth resources) according to the UE's uplink and downlink throughput in the source cell. In this embodiment, the idle resources of the target base station are sufficient to ensure the UE's uplink and downlink throughput (uplink 600 kbps, downlink 700 kbps), so the access control is successful.

Step 203, the target base station sends handover request confirmation signaling to the source base station, and the handover request confirmation signaling includes resource information allocated by the target base station for the UE.

In step 204, the source base station sends a handover command to the UE after receiving the handover request acknowledgment signaling.

Here, the source base station sends the handover command to the UE by carrying mobility control information through RRC connection reconfiguration.

Step 205, the UE receives the handover command, obtains synchronization with the target cell, initiates random access in the target cell, and sends a handover completion signaling to the target base station.

Here, after receiving the handover completion signaling from the UE, the target base station will trigger the core network to complete the network side path handover, so that the UE can continue to carry out services.

In this embodiment, the target base station allocates resources according to the uplink and downlink throughput of the UE in the source cell. This is mainly because the services carried out by the UE are correlated within a period of time, that is, the throughput of the UE before handover and the throughput after handover Therefore, the target base station allocates resources to the UE according to the actual throughput of the UE, so as to ensure that the service throughput of the UE will not be reduced due to the impact of the handover, and the user experience is enhanced. There is another implementation form of this embodiment. In step 202, after the target base station receives the handover request signaling, it implements access control according to the service quality parameters of the E-RAB established by the UE, and the throughput of the UE in the source cell Allocate resources for the UE; other steps are the same as in this embodiment.

This embodiment is applied to the LTE system, and the method described in the present invention is also applicable to the WCDMA system. In the WCDMA system, the source radio network controller (SRNC) where the UE is located detects the throughput of the UE in the source cell. When the UE is handed over, the enhanced relocation request sent by the SRNC to the target radio network controller (TRNC) through the Iur interface contains For the throughput of the UE in the source cell, the TRNC implements access control and allocates resources according to the QoS of the radio access bearer established by the UE and the throughput of the UE in the source cell.

Embodiment two:

In the LTE system, there is no X2 interface between base station 1 and base station 2, and the cells under the jurisdiction of base station 1 (Cell1 and Cell 2) and the cells under the jurisdiction of base station 2 (Cell 3 and Cell 4) are neighbors. Base station 1 and base station 2 are any two base stations in the LTE system, and both base stations are connected to the core network.

The UE is in the connected state in Cell 1 (serving cell, or source cell), and the radio access bearer E-RAB established by the UE is a non-GBR service.

The UE performs measurement in Cell 1 according to the measurement configuration sent by base station 1, and reports the measurement objects that meet the reporting conditions. At a certain moment, the UE reports to base station 1 that the signal quality of adjacent cells (Cell 3 and Cell 4) is higher than that of the serving cell (Cell 1) by a predetermined offset, and base station 1 makes a handover after receiving the measurement report decision, the target cell for handover is Cell 3. In this embodiment, base station 1 is the source base station, and base station 2 is the target base station, and the specific process of handover is shown in Figure 3, including the following steps:

In step 301, the source base station sends handover requirement signaling to the core network.

Here, the handover requirement signaling includes the identity of the target cell, configuration information in the source cell, and the like. In order to realize the present invention, the handover requirement signaling also carries the throughput of the UE in the source cell.

Here, after the UE establishes E-RAB, the source base station needs to detect the throughput of the UE all the time. The throughput can be represented by the capacity of data packets sent to the UE (downlink) or received by the UE (uplink) per unit time. For downlink Specifically, it can be expressed as the total data packet capacity sent to the UE/the time length of sending data packets to the UE, and the unit is bit/second; for the uplink, it can be specifically expressed as the total data packet capacity sent by the receiving UE/received The length of time for the UE to send data packets, in bit/s. After the source base station detects and obtains the uplink and/or downlink throughput of the UE, the parameter is included in the handover requirement signaling, and a new information element is required to indicate the uplink and/or downlink throughput of the UE. In this embodiment, the uplink and downlink throughputs of the UE are 300 kbps and 500 kbps respectively.

Step 302: After receiving the handover requirement signaling, the core network sends the handover request signaling to the target base station.

The handover request signaling includes the identity of the target cell, the identity of the E-RAB established by the UE, QoS parameters, configuration information in the source cell, and the like. The handover request signaling also carries the throughput of the UE in the source cell. The core network has the identity of the E-RAB established by the UE and the corresponding QoS parameters, which will be included in the handover request signaling.

Step 303, after receiving the handover request, the target base station implements access control according to the throughput of the UE in the source cell, and allocates resources for the UE.

Here, since the E-RAB established by the UE is a non-GBR service, the target base station cannot know exactly the size of resources allocated to the UE (or the size of reserved resources) only by QoS parameters. , the target base station implements access control according to the QoS parameters and the uplink and downlink throughput of the UE in the source cell, and allocates or reserves resources (including radio resources, hardware resources, and S1 interface transmission layer bandwidth resources) for the UE. In this embodiment, the idle resources of the target base station are sufficient to ensure the uplink and downlink throughput of the UE (uplink 300 kbps, downlink 500 kbps), so the access control is successful. In particular, if the target cell is a carrier aggregation cell (a cell composed of multiple component carriers), the target base station allocates resources for the UE according to the uplink and downlink throughput of the UE in the source cell, including selecting a carrier or allocating a carrier. number.

Step 304, the target base station sends handover request confirmation signaling to the core network, and the handover request confirmation signaling includes resource information allocated by the target base station to the UE.

Step 305, the core network sends a handover command to the source base station.

Step 306, after receiving the handover command from the core network, the source base station sends the handover command to the UE.

Here, the source base station sends the handover command to the UE by carrying mobility control information through RRC connection reconfiguration.

In step 307, the UE receives the handover command, obtains synchronization with the target cell, initiates random access in the target cell, and sends a handover completion signaling to the target base station.

Here, after receiving the handover completion signaling from the UE, the target base station will notify the core network that the UE has been handed over to the target base station.

This embodiment is applied to the LTE system, and the method described in the present invention is also applicable to the WCDMA system. In the WCDMA system, if there is no Iur interface between the SRNC and TRNC, when the UE is handed over, the SRNC sends a relocation request to the TRNC through the core network, and the request carries the throughput of the UE in the source cell. The TRNC implements access control and allocates resources according to the QoS of the radio access bearer established by the UE and the throughput of the UE in the source cell.

In this embodiment, the UE has only established one E-RAB. If the UE has established multiple E-RABs, the source base station detects the uplink and downlink throughput of these multiple E-RABs, and the multiple E-RABs detected during handover will be - The uplink and downlink throughput of the RAB is sent to the target base station through handover signaling, and the target base station performs access control and allocates resources according to the QoS parameters of the E-RAB and the uplink and downlink throughput of the UE. In particular, if there is the same QoS category identifier QCI, or allocation and reservation priority ARP in multiple E-RABs established by the UE, the base station calculates the total throughput of the E-RABs with the same QCI or ARP, and transmits it in the handover signaling Including the total throughput, the target base station uniformly implements access control and resource allocation for E-RABs with the same QCI or ARP. Here, the total uplink and downlink throughputs are calculated separately, and the target base station needs to satisfy the total uplink and downlink throughputs respectively when performing access control.

Embodiment three:

In the LTE system, there is an X2 interface between base station 1 and base station 2, and the cells under the jurisdiction of base station 1 (Cell 1 and Cell 2) and the cells under the jurisdiction of base station 2 (Cell 3, Cell 4 and Cell 5) are neighbors. Base station 1 and base station 2 are any two base stations in the LTE system.

The UE is in the connected state in Cell 1 (serving cell, or source cell). The radio access bearer E-RAB established by the UE is a GBR service. The maximum bit rate for both lines is 900kbps.

The UE performs measurement in Cell 1 according to the measurement configuration sent by base station 1, and reports the measurement objects that meet the reporting conditions. At a certain moment, the UE reports to base station 1 that the signal quality of neighboring cells (Cell 3, Cell 4, and Cell 5) is higher than that of the serving cell (Cell 1) by a predetermined offset. After base station 1 receives the measurement report, A handover decision is made, and the handover target cell is Cell 3. Since the signal quality of Cell 4 and Cell 5 measured by the UE is also very good, the source base station carries the reestablishment information (ReestablishmentInfo) of the UE in Cell 4 and Cell 5 in the handover signaling, and the reestablishment information includes the cell wireless network of the UE in the source cell Temporary identifier C-RNTI (Cell Radio Network Temporary Identifier), physical cell identifier of the source cell, global identifier of the target cell for potential reconstruction, encryption key KeNB ^* of the UE in the target cell for potential reconstruction, and truncated message integrity authentication Code (short MAC-I). In this embodiment, base station 1 is the source base station, and base station 2 is the target base station, and the specific process of handover is shown in Figure 4, including the following steps:

Step 401, the source base station sends handover request signaling to the target base station.

Here, the handover request signaling includes the identity of the target cell, the identity of the E-RAB established by the UE, QoS parameters, configuration information in the source cell, and re-establishment information of the UE in Cell 4 and Cell 5, etc. In order to realize the present invention, the handover request signaling also carries the throughput of the UE in the source cell.

Here, after the UE establishes the E-RAB, the source base station needs to continuously detect the throughput of the UE. The throughput can be represented by the capacity of sending (downlink) to the UE or receiving (uplink) data packets sent by the UE within a unit time, or can be Expressed as the average data packet capacity sent to the UE (downlink) or received by the UE (uplink) within a period of time, the period of time may be configured by default in the protocol or configured by the network side (source base station). In this embodiment, the source base station detects the average throughput within 10 seconds before sending the handover signaling. For the downlink, it can be specifically expressed as the total data packet capacity (or size) sent to the UE within 10 seconds before the source base station sends the handover signaling. )/10 seconds, the unit is bit/s; for uplink, it can be specifically expressed as the total data packet capacity received by the UE within 10 seconds before the source base station sends the handover signaling/10 seconds, and the unit is bit/s. After the source base station detects and obtains the uplink and/or downlink throughput of the UE, the parameter is included in the handover request, and a new information element is required to indicate the uplink and/or downlink throughput of the UE. In this embodiment, the uplink and downlink throughputs of the UE are 600 kbps and 700 kbps respectively.

Step 402, after receiving the handover request signaling, the target base station implements access control according to the throughput of the UE in the source cell, and allocates resources for the UE.

Here, since the handover request signaling includes the QoS parameters for establishing E-RAB by the UE and the throughput of the UE uplink and downlink, and the throughput of the UE uplink and downlink is greater than the guaranteed bit rate of the uplink and downlink, the target base station finds that Cell 3 can meet the UE establishment requirements. The QoS parameter requirements of E-RAB, but the resources of Cell 3 cannot meet the throughput requirements of the UE in the uplink and downlink of the source cell, and the target base station finds that the resources of Cell 4 can meet the throughput requirements of the UE in the uplink and downlink of the source cell. Therefore, the target base station resets the target cell for handover, selects Cell 4 as the target cell, and allocates resources. It should be noted that, in step 401, the handover request includes the re-establishment information of the UE in Cell 4 and Cell 5, so the target base station considers that Cell 4 and Cell 5 can be the target cells for UE handover, and since the re-establishment information contains the encryption key KeNB ^* , so the target base station can modify the target cell (from Cell 3 to Cell 4).

Step 403, the target base station sends handover request confirmation signaling to the source base station, where the handover request confirmation signaling includes resource information allocated by the target base station for the UE.

In step 404, the source base station sends a handover command to the UE after receiving the handover request acknowledgment signaling.

Here, the source base station sends the handover command to the UE by carrying mobility control information through RRC connection reconfiguration.

Step 405, the UE receives the handover command, obtains synchronization with the target cell, initiates random access in the target cell, and sends a handover completion signaling to the target base station.

Here, after receiving the handover completion signaling from the UE, the target base station will trigger the core network to complete the network side path handover, so that the UE can continue to carry out services.

In this embodiment, the target base station selects a cell for the UE that can meet the throughput according to the throughput of the UE in the source cell, so as to avoid the phenomenon that the throughput of the UE is reduced after handover, and enhance user experience.

Embodiment four:

In the LTE system, there is an X2 interface between base station 1 and base station 2, and the cells (Cell 1 and Cell 2) under the jurisdiction of base station 1 and the cells under the jurisdiction of base station 2 (Cell 3 and Cell 4) are adjacent to each other. Base station 1 and base station 2 are any two base stations in the LTE system.

The UE is in the connected state in Cell 1 (serving cell, or source cell). The radio access bearer E-RAB established by the UE is a GBR service. The maximum bit rate for each row is 800kbps.

The UE performs measurement in Cell 1 according to the measurement configuration sent by base station 1, and reports the measurement objects that meet the reporting conditions. At a certain moment, UE reports to base station 1 that the signal quality of adjacent cells (Cell 3 and Cell 4) is higher than that of the serving cell (Cell1) by a predetermined offset, and base station 1 makes a handover decision after receiving the measurement report , the handover target cell is Cell 3. In this embodiment, base station 1 is the source base station, and base station 2 is the target base station, and the specific process of switching is similar to the flow chart shown in Figure 2, including the following steps:

Step 501, the source base station sends handover request signaling to the target base station.

Here, the handover request signaling includes the identity of the target cell, the identity of the E-RAB established by the UE, QoS parameters, configuration information in the source cell, and the like. In order to realize the present invention, the handover request signaling also carries the throughput of the UE in the source cell.

Here, after the UE establishes E-RAB, the source base station needs to detect the throughput of the UE all the time. The throughput can be represented by the capacity of data packets sent to the UE (downlink) or received by the UE (uplink) per unit time. For downlink Specifically, it can be expressed as the total data packet capacity (or size) sent to the UE/the time length of the data packet sent to the UE, and the unit is bit/s; for the uplink, it can be specifically expressed as the total data sent by the receiving UE Packet capacity/the length of time for the receiving UE to send data packets, the unit is bit/s. After the source base station detects and obtains the uplink and/or downlink throughput of the UE, the parameter is included in the handover request, and a new information element is required to indicate the uplink and/or downlink throughput of the UE. In this embodiment, the actual throughput of the UE is relatively low, and the uplink and downlink throughputs are 300 kbps and 400 kbps respectively.

Step 502, after receiving the handover request signaling, the target base station implements access control according to the throughput of the UE in the source cell, and allocates resources for the UE.

Here, since the handover request signaling includes the QoS parameters for establishing E-RAB by the UE and the UE's uplink and downlink throughput, and the UE's uplink and downlink throughput is lower than its guaranteed uplink and downlink bit rate, the target base station finds that the resources of Cell 3 cannot To meet the QoS requirements of the UE to establish E-RAB, but to meet the UE's uplink and downlink throughput requirements in the source cell, the target base station allocates resources for the UE or reserves resources (including wireless resources, hardware resources, and S1 interface transport layer bandwidth resources). In this embodiment, the idle resources of the target base station are sufficient to ensure the UE uplink and downlink throughput (uplink 300 kbps, downlink 400 kbps), so the access control is successful.

Step 503, the target base station sends handover request confirmation signaling to the source base station, and the handover request confirmation signaling includes resource information allocated by the target base station for the UE.

Step 504, after receiving the handover request confirmation signaling, the source base station sends a handover command to the UE.

Here, the source base station sends the handover command to the UE by carrying mobility control information through RRC connection reconfiguration.

Step 505, the UE receives the handover command, obtains synchronization with the target cell, initiates random access in the target cell, and sends a handover completion signaling to the target base station.

After receiving the handover completion signaling from the UE, the target base station will trigger the core network to complete the network side path handover, so that the UE can continue to carry out services.

In this embodiment, when the resources cannot meet the QoS requirements of the E-RAB built by the UE, the target base station implements access control according to the throughput of the UE in the source cell, and allocates or reserves resources for it, so as to avoid problems caused by insufficient resources. The switch of failed. If the handover fails and the UE detects that the signal quality of the source cell is very poor, the connection of the UE may be interrupted, which affects the experience of the user.

An access control system during handover, the system comprising: an access control unit, which is used when the target network side receives a handover signaling from the source network side, according to the user equipment in the source cell The throughput, or the quality of service parameter of the radio access bearer implements access control; wherein, the throughput of the user equipment in the source cell is included in the handover signaling.

Here, the throughput of the user equipment in the source cell includes: the uplink throughput of the user equipment in the source cell, and/or the downlink throughput of the user equipment in the source cell.

Here, the uplink throughput of the user equipment in the source cell includes: the quotient of the total data packet capacity sent by the receiving user equipment divided by the time length for receiving the data packet sent by the user equipment, or the average data packet capacity sent by the receiving user equipment within a period of time .

Here, the downlink throughput of the user equipment in the source cell includes: the quotient of the total data packet capacity sent to the user equipment divided by the time length for sending data packets to the user equipment, or the average data packet capacity sent to the user equipment within a period of time.

Here, the period of time is configured by default by the protocol or configured by the source network side.

Here, the access control unit is further configured to allocate or reserve resources for the user equipment when implementing the access control according to the throughput of the user equipment in the source cell or the quality of service parameter of the radio access bearer. The access control unit at this time includes the following specific implementations:

Specific implementation one: the access control unit is further configured to: when the throughput of the user equipment in the source cell is less than or equal to the guaranteed bit rate or the maximum bit rate in the quality of service parameter of the radio access bearer, the target The network side implements access control according to the throughput of the user equipment in the source cell, and allocates or reserves resources for the user equipment.

Specific implementation two: the access control unit is further configured to: when the throughput of the user equipment in the source cell is greater than the guaranteed bit rate in the quality of service parameter of the radio access bearer, the target network side according to the radio access bearer The quality of service parameter implements access control, and if resources are allowed, resources are allocated or reserved for the user equipment based on the throughput of the user equipment in the source cell.

Specific implementation three: when the quality of service parameters of the radio access bearer in the handover signaling do not include the guaranteed bit rate and the maximum bit rate, the target network side implements access control according to the throughput of the user equipment in the source cell, for The user equipment allocates or reserves resources.

Specific implementation four: when the target cell included in the handover signaling cannot meet the throughput requirements of the user equipment in the source cell, the target network side selects for the user equipment to meet the throughput requirements of the user equipment in the source cell target area.

Specific implementation five: When the throughput of the user equipment in the source cell is greater than the guaranteed bit rate in the quality of service parameter of the wireless access bearer, the target network side implements access control based on the throughput of the user equipment in the source cell, and the user equipment in the source cell The throughput of the source cell allocates or reserves resources for the user equipment.

Here, the Chinese and English involved in the above text are explained: RRC connection reconfiguration is represented by RRCConnection Reconfiguration; mobility control information is represented by mobilityControlInfo; handover request is represented by Handover Request; handover requirement is represented by Handover Required; handover request confirmation is represented by Handover Request Acknowledge Indicates; handover completion is indicated by RRC ConnectionReconfiguration Complete; enhanced relocation request is indicated by Enhanced Relocation Request; handover command is indicated by Handover Command.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (14)

1. An access control method during handover, characterized in that the method comprises: The source network side sends handover signaling to the target network side; the handover signaling includes the throughput of the user equipment in the source cell; After receiving the handover signaling, the target network side implements access control according to the throughput of the user equipment in the source cell or the QoS parameter of the radio access bearer. 2. The method according to claim 1, wherein the throughput of the user equipment in the source cell comprises: the uplink throughput of the user equipment in the source cell, and/or the downlink throughput of the user equipment in the source cell. 3. The method according to claim 2, wherein the uplink throughput of the user equipment in the source cell comprises: the total data packet capacity received by the user equipment divided by the time length for receiving the data packet sent by the user equipment quotient, or the average volume of data packets received from user equipment over a period of time. 4. The method according to claim 2, wherein the downlink throughput of the user equipment in the source cell comprises: the total data packet capacity sent to the user equipment divided by the time length for sending data packets to the user equipment quotient, or the average packet volume sent to a user device over a period of time. 5. The method according to claim 3 or 4, wherein the period of time is configured by default in a protocol or configured by the source network side. 6. The method according to claim 1, further comprising: when implementing the access control according to the throughput of the user equipment in the source cell or the quality of service parameter of the radio access bearer, The user equipment allocates or reserves resources. 7. The method according to claim 6, wherein when the throughput of the user equipment in the source cell is less than or equal to the guaranteed bit rate or the maximum bit rate in the quality of service parameter of the radio access bearer, The allocating or reserving resources for the user equipment when implementing the access control specifically includes: the target network side implements access control according to the throughput of the user equipment in the source cell, allocating or reserving resources for the user equipment reserve resources; or, When the throughput of the user equipment in the source cell is greater than the guaranteed bit rate in the quality of service parameter of the radio access bearer, the allocating or reserving resources for the user equipment when implementing the access control specifically includes: the target The network side implements access control according to the quality of service parameters of the radio access bearer, and if resources permit, allocate or reserve resources for the user equipment based on the throughput of the user equipment in the source cell; or, When the quality of service parameters of the radio access bearer in the handover signaling do not include the guaranteed bit rate and the maximum bit rate, the allocating or reserving resources for the user equipment when implementing the access control specifically includes: the target network The side implements access control according to the throughput of the user equipment in the source cell, and allocates or reserves resources for the user equipment; or, When the target cell included in the handover signaling cannot satisfy the throughput of the user equipment in the source cell, the allocating or reserving resources for the user equipment when implementing the access control specifically includes: the target network side Selecting for the user equipment a target cell that meets the throughput requirements of the user equipment in the source cell; or, When the throughput of the user equipment in the source cell is greater than the guaranteed bit rate in the quality of service parameter of the radio access bearer, allocating or reserving resources for the user equipment when implementing the access control specifically includes : The target network side implements access control according to the throughput of the user equipment in the source cell, and allocates or reserves resources for the user equipment. 8. A system for access control during handover, characterized in that the system includes: an access control unit, configured to determine whether the user equipment is in the source network when the target network side receives the handover signaling from the source network side The throughput of the cell or the quality of service parameter of the radio access bearer implements access control; wherein, the throughput of the user equipment in the source cell is included in the handover signaling. 9. The system according to claim 8, wherein the throughput of the user equipment in the source cell comprises: the uplink throughput of the user equipment in the source cell, and/or the downlink throughput of the user equipment in the source cell. 10. The system according to claim 9, wherein the uplink throughput of the user equipment in the source cell comprises: the total data packet capacity received by the user equipment divided by the time length for receiving the data packet sent by the user equipment quotient, or the average volume of data packets received from user equipment over a period of time. 11. The system according to claim 9, wherein the downlink throughput of the user equipment in the source cell comprises: the total data packet capacity sent to the user equipment divided by the time length for sending data packets to the user equipment quotient, or the average packet volume sent to a user device over a period of time. 12. The system according to claim 10 or 11, wherein the period of time is configured by default by the protocol or configured by the source network side. 13. The system according to claim 8, wherein the access control unit is further configured to implement the access control according to the throughput of the user equipment in the source cell or the quality of service parameter of the radio access bearer , allocating or reserving resources for the user equipment. 14. The system according to claim 13, wherein the access control unit is further configured to: when the throughput of the user equipment in the source cell is less than or equal to the quality of service parameter of the radio access bearer When the guaranteed bit rate or the maximum bit rate is guaranteed, the target network side implements access control according to the throughput of the user equipment in the source cell, and allocates or reserves resources for the user equipment; or, When the throughput of the user equipment in the source cell is greater than the guaranteed bit rate in the quality of service parameter of the radio access bearer, the target network side implements access control according to the quality of service parameter of the radio access bearer, and if resources allow In this case, allocate or reserve resources for the user equipment based on the throughput of the user equipment in the source cell; or, When the quality of service parameters of the radio access bearer in the handover signaling do not include the guaranteed bit rate and the maximum bit rate, the target network side implements access control according to the throughput of the user equipment in the source cell, and provides allocate or reserve resources; or, When the target cell included in the handover signaling cannot meet the throughput of the user equipment in the source cell, the target network side selects for the user equipment a target cell that meets the throughput requirements of the user equipment in the source cell; or, When the throughput of the user equipment in the source cell is greater than the guaranteed bit rate in the quality of service parameter of the radio access bearer, allocating or reserving resources for the user equipment when implementing the access control specifically includes : The target network side implements access control according to the throughput of the user equipment in the source cell, and allocates or reserves resources for the user equipment.

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