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

Method and system for access control in handover Download PDF

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Publication number
CN102316540A
CN102316540A CN2010102281711A CN201010228171A CN102316540A CN 102316540 A CN102316540 A CN 102316540A CN 2010102281711 A CN2010102281711 A CN 2010102281711A CN 201010228171 A CN201010228171 A CN 201010228171A CN 102316540 A CN102316540 A CN 102316540A
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user equipment
throughput
source cell
access control
cell
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CN102316540B (en
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邓云
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ZTE Corp
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ZTE Corp
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Priority to CN201010228171.1A priority Critical patent/CN102316540B/en
Priority to PCT/CN2011/076519 priority patent/WO2012003769A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

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 switching
Technical Field
The present invention relates to a control technology during handover, and in particular, to a method and a system for controlling access during handover.
Background
In a mobile communication system, in order to meet a mobility requirement, after a User Equipment (UE) establishes a connection with a network in a serving cell, i.e., a source cell, the UE still needs to measure signal quality of the serving cell and a neighboring cell so as to select a more suitable cell for handover. In the handover process, the target cell needs to perform Access control on the UE, and in the case that the resource is allowed, the handover request of the UE is allowed, and a specific handover procedure is shown in fig. 1, where an Evolved Universal Terrestrial Radio Access Network (EUTRAN) is taken as an example, the handover procedure in fig. 1 includes the following steps:
step 101, when a serving cell, i.e. a UE in a connected state of a source cell, performs measurement according to measurement configuration, and when the UE measures an adjacent cell satisfying a reporting condition, the UE reports a measurement report to a 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.
Step 102, after receiving the measurement report, the source base station to which the source cell belongs makes a handover decision, and needs to handover the UE to an adjacent base station, i.e. a target cell in which 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 a Quality of Service (QoS) parameter of a 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 parameter included in the handover request, and allows the handover of the UE and allocates resources to the UE when the resources are allowed.
Step 104, the target base station sends a switching request confirmation to the source base station, wherein the switching request confirmation comprises the allocated resource information.
And 105, after receiving the switching request confirmation, the source base station sends a switching command to the UE.
Here, in the existing LTE system, the source base station sends a handover command to the UE through the RRC connection reconfiguration message carrying mobility control information (mobility control info).
And 106, the UE acquires the synchronization with the target cell, initiates random access in the target cell and sends a switching completion signaling to the target base station, so that the UE is switched to the target cell.
In step 103 of the handover procedure, when the target base station performs access control according to the QoS parameter of the E-RAB established by the UE, the QoS parameter includes a QoS Class Identifier (QCI), an Allocation and Retention Priority (ARP). If the E-RAB established by the UE is Guaranteed Bit Rate (GBR) traffic, the QoS parameters further include an uplink GBR and a downlink GBR, and an uplink and downlink Maximum Bit Rate (MBR), which may be greater than or equal to the GBR. Wherein the GBR may also be referred to as a guaranteed bit rate; the MBR may also be referred to as 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 performs access control, so that the following problems are caused:
one situation is: when the target base station finds that the UE establishes the GBR service, access control needs to be implemented according to GBR, and since the actual Throughput (Throughput) of the UE in the source cell is not considered in the access control process, the Throughput here can also be understood as traffic, therefore, if the actual Throughput of the UE exceeds GBR, the target base station can only implement access control according to GBR and allocate resources to the UE, which results in the following problems: the service rate of the UE is greatly reduced after switching, and the user experience is influenced; the other situation is that: if the target base station finds that the UE establishes non-GBR service, the target base station does not consider the actual throughput of the UE in the source cell to implement access control, so that the following problems are caused: too much or too little resource allocation or resource reservation for the UE will result in resource waste when too much resource allocation is performed for the UE, while too little resource allocation for the UE will result in a greatly reduced service rate after UE handover, and will also affect user experience. In summary, in the prior art, when performing access control, since the actual throughput of the UE in the source cell is not considered, access control cannot be performed according to the actual service requirement of the UE, thereby affecting the user experience. There is a pressing need for an improved access control scheme.
Disclosure of Invention
In view of this, the main objective 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 requirement of the UE, so as not to affect the user experience.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an access control method in handover, the method comprising:
the source network side sends a switching signaling to the target network side; the handover signaling comprises throughput of the user equipment in the source cell;
and after receiving the switching signaling, the target network side implements access control according to the throughput of the user equipment in the source cell or the service quality parameter of the wireless access bearer.
Wherein the throughput of the user equipment in the source cell comprises: the throughput of the user equipment uplink in the source cell and/or the throughput of the user equipment downlink in the source cell.
Wherein the throughput of the user equipment uplink on the source cell comprises: the total packet capacity sent by the receiving user equipment is divided by the length of time that the receiving user equipment sends the packets, or the average packet capacity sent by the receiving user equipment over a period of time.
Wherein the downlink throughput of the user equipment in the source cell comprises: the total packet capacity transmitted to the user equipment divided by the length of time the packet was transmitted to the user equipment, or the average packet capacity transmitted to the user equipment over a period of time.
Wherein the period of time is configured by protocol default or by the source network side.
Wherein, the method also comprises: and when the access control is implemented according to the throughput of the user equipment in the source cell or the service quality parameter of the wireless access bearer, allocating or reserving resources for the user equipment.
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 a source cell, and allocates or reserves resources for the user equipment; or,
when the throughput of the ue in the source cell is greater than the guaranteed bit rate in the qos parameter of the radio access bearer, the allocating or reserving resources for the ue when performing the access control specifically includes: the target network side implements access control according to the service quality parameters of the wireless access bearer, and under the condition of resource permission, the throughput of the user equipment in a source cell is used for allocating or reserving resources for the user equipment; or,
when the qos parameter of the radio access bearer in the handover signaling does not include the guaranteed bit rate and the maximum bit rate, the allocating or reserving resources for the ue when performing the access control specifically includes: the target network side implements access control according to the throughput of the user equipment in a 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 ue in the source cell, the allocating or reserving resources for the ue when performing the access control specifically includes: the target network side selects a target cell which meets the throughput requirement of the user equipment in a source cell for the user equipment; or,
when the throughput of the ue in the source cell is greater than the guaranteed bit rate in the qos parameter of the radio access bearer, the allocating or reserving resources for the ue when performing the access control specifically includes: and 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 at handover, the system comprising: the access control unit is used for implementing access control according to the throughput of the user equipment in the source cell or the service quality parameter of the wireless access bearer under the condition that the target network side receives the switching signaling from the source network side; 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 comprises: the throughput of the user equipment uplink in the source cell and/or the throughput of the user equipment downlink in the source cell.
Wherein the throughput of the user equipment uplink on the source cell comprises: the total packet capacity sent by the receiving user equipment is divided by the length of time that the receiving user equipment sends the packets, or the average packet capacity sent by the receiving user equipment over a period of time.
Wherein the downlink throughput of the user equipment in the source cell comprises: the total packet capacity transmitted to the user equipment divided by the length of time the packet was transmitted to the user equipment, or the average packet capacity transmitted to the user equipment over a period of time.
Wherein the period of time is configured by protocol default or by the source network side.
The access control unit is further configured to allocate or reserve resources for the user equipment when performing 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 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, implement access control by the target network side according to the throughput of the user equipment in the source cell, and allocate or reserve 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 service quality parameters of the wireless access bearer, the target network side implements access control according to the service quality parameters of the wireless access bearer, and under the condition of resource permission, the throughput of the user equipment in the source cell is used for allocating or reserving resources for the user equipment; or,
when the service quality parameters of the wireless access bearer in the switching signaling do not comprise 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 allocates or reserves resources for the user equipment; or,
when a target cell contained in a handover signaling cannot meet the throughput of the user equipment in a source cell, selecting the target cell meeting the throughput requirement of the user equipment in the source cell for the user equipment by the target network side; or,
when the throughput of the ue in the source cell is greater than the guaranteed bit rate in the qos parameter of the radio access bearer, the allocating or reserving resources for the ue when performing the access control specifically includes: and 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.
The source network side of the invention sends a switching signaling to the target network side; the handover signaling comprises the throughput of the user equipment in the source cell; and after receiving the switching signaling, the target network side implements access control according to the throughput of the user equipment in the source cell or the service quality parameter of the wireless access bearer.
By adopting the invention, the actual throughput of the user equipment in the source cell is considered, and the access control is implemented according to the throughput of the user equipment in the source cell or the service quality parameter of the wireless access bearer, so the access control can be carried out according to the actual service requirement of the UE, and the user experience can not be influenced.
Drawings
Fig. 1 is a schematic diagram illustrating a UE handover procedure of an LTE system in the prior art;
FIG. 2 is a schematic diagram of a switching process according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a second handover procedure according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a third handover procedure according to an embodiment of the present invention.
Detailed Description
The basic idea of the invention is: the source network side sends a switching signaling to the target network side; the handover signaling comprises the throughput of the user equipment in the source cell; and after receiving the switching signaling, the target network side implements access control according to the throughput of the user equipment in the source cell or the service quality parameter of the wireless access bearer.
The following describes the embodiments in further detail with reference to the accompanying drawings.
According to the scheme of the invention, because the actual throughput of the UE in the source cell is considered, the access control can be carried out according to the actual service requirement of the UE, so that the user experience is not influenced. The access control can be carried out according to the actual service requirement of the UE, so that the resource allocation is carried out for the UE during the access control, the rationality is better, the time service requirement of a user is better met, and the user experience is greatly improved.
An access control method during switching, which mainly comprises the following contents:
the switching signaling sent by the source network side to the target network side comprises the throughput of the UE in the source cell, and after receiving the switching signaling, the target network side implements access control according to the throughput of the UE in the source cell or the QoS parameter of the E-RAB. The throughput of the UE in the source cell herein refers to the actual throughput of the UE in the source cell, and is not described herein.
And further, when the access control is implemented according to the throughput of the UE in the source cell or the QoS parameter of the E-RAB, resources are allocated or reserved for the UE.
Further, the throughput of the UE in the source cell includes: the throughput of the UE uplink in the source cell and/or the throughput of the UE downlink in the source cell.
Further, the throughput of the UE uplink on the source cell includes: the total packet capacity sent by the receiving UE divided by the length of time the receiving UE sends packets, or the average packet capacity sent by the receiving UE over a period of time.
Further, the downlink throughput of the UE in the source cell includes: the total packet capacity sent to the UE divided by the length of time the packets were sent to the UE, or the average packet capacity sent to the UE over a period of time.
Further, the period of time is configured by a protocol default or by the source network side.
Further, when performing access control according to the throughput of the UE in the source cell or the QoS parameter of the E-RAB, allocating or reserving resources for the UE includes the following situations:
the first condition is as follows: and 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 parameter of the E-RAB, the target network side implements access control according to the throughput of the UE in the source cell, and allocates or reserves resources for the UE according to the throughput of the UE in the source cell.
Case two: and when the throughput of the UE in the source cell is greater than the guaranteed bit rate in the QoS parameter of the E-RAB, the target network side implements access control according to the QoS parameter of the E-RAB, and under the condition of resource allowance, the throughput of the UE in the source cell is used for allocating or reserving resources for the UE.
Case three: and when the QoS parameters of the E-RAB in the switching signaling do not comprise 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 resources for the UE.
Case four: and when the target cell contained in the switching signaling cannot meet the throughput of the UE in the source cell, the target network side selects the target cell meeting the throughput requirement of the UE in the source cell for the UE.
Case five: and when the throughput of the UE in the source cell is greater than the guaranteed bit rate in the QoS parameter of the E-RAB, the target network side implements access control according to the throughput of the UE in the source cell, and allocates or reserves resources for the UE according to the throughput of the UE in the source cell.
Further, for the source network side, the source network side refers to a source base station in an LTE system; in a WCDMA system the source network side refers to the source radio network controller.
Further, for the target network side, the target network side refers to a target base station in an LTE system; and the target network side in the WCDMA system refers to a target wireless network controller.
Further, for the handover signaling, in an LTE system, the handover signaling refers to a handover request or a handover requirement; in WCDMA systems the handover signaling refers to a relocation request or relocation requirement.
Further, the method further comprises: and the target network side returns a switching command or a repositioning command to the source network side, and the source network side sends the switching command to the UE to trigger the UE to be switched to the target cell.
In summary, by adopting the invention, the target network side can implement access control according to the actual service requirement of the UE, and resources are allocated to the UE when the access control is implemented, so that the situation that the UE has throughput change before and after switching is avoided, and the user experience is enhanced.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described below by way of example with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The first embodiment is as follows:
in the LTE system, an X2 interface exists between a base station 1 and a base station 2, and cells (Cell1 and Cell 2) governed by the base station 1 and cells (Cell 3 and Cell 4) governed by the base station 2 are in a neighboring Cell relationship. Base station 1 and base station 2 are any two base stations in the LTE system.
The UE is in a connected state in Cell1 (serving Cell, or source Cell), the radio access bearer E-RAB established by the UE is GBR service, the guaranteed bit rate of uplink and downlink is 500kbps (kilobits/second), and the maximum bit rate of uplink and downlink is 800 kbps.
And the UE carries out measurement in the Cell1 according to the measurement configuration sent by the base station 1 and reports the measurement object meeting the reporting condition. At a certain moment, the UE reports to the base station 1 that the signal quality of the neighboring cells (Cell 3 and Cell 4) is higher than that of the serving Cell (Cell1) by a predetermined offset, and after receiving the measurement report, the base station 1 makes a handover decision, where the target Cell for handover is Cell 3. The base station 1 needs to consider a plurality of factors such as the signal quality of the serving cell, the signal quality of the target cell, the load of the target cell, etc. for implementing the handover decision, which belongs to the prior art and is not described in detail herein. In this embodiment, the base station 1 is a source base station, the base station 2 is a target base station, and a specific handover procedure is shown in fig. 2, and includes 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 an identifier of the target cell, an identifier of the E-RAB established by the UE, QoS parameters, configuration information in the source cell, and the like. In order to implement 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 may also be referred to as the flow rate of the UE in the source cell, and the present invention is not limited to the specific names herein, and any names that can achieve the same functions of the present invention are within the scope of the present invention, and are not described in detail.
Here, the source base station needs to detect the throughput of the UE all the time after the UE establishes the E-RAB, where the throughput can be represented by the capacity of a packet transmitted to the UE (downlink) or received from the UE (uplink), and for the downlink, specifically, the throughput can be represented by the total packet capacity (or size) transmitted to the UE/the time length for transmitting the packet to the UE, and the unit is bit/second; for uplink, the total packet capacity sent by the receiving UE/the time length of sending the packet by the receiving UE may be specifically expressed, and the unit is bit/second. After the source base station detects and obtains the uplink and/or downlink throughput of the UE, the handover request includes the parameter, and a new cell 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 600kbps and 700kbps, respectively. Wherein, the uplink and/or downlink throughput of the UE refers to three conditions, which are respectively: uplink throughput of the UE; downlink throughput of the UE; uplink throughput of the UE and 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 to the UE according to the throughput of the UE in the source cell.
Here, the handover request signaling includes QoS parameters for establishing the E-RAB by the UE and throughput of uplink and downlink of the UE, and the throughput of uplink and downlink of the UE is respectively greater than the guaranteed bit rate of uplink and downlink of the UE, and the target base station implements access control according to the throughput of the UE in the source cell, and allocates resources or reserves resources (including wireless resources, hardware resources, and bandwidth resources of an S1 interface transport layer) for the UE according to the throughput of the UE in the source cell and downlink of the UE. In this embodiment, the idle resources of the target base station are sufficient to ensure the uplink and downlink throughput (uplink 600kbps, downlink 700kbps) of the UE, so that the access control is successful.
Step 203, the target base station sends a handover request acknowledgement signaling to the source base station, where the handover request acknowledgement signaling includes resource information allocated by the target base station for the UE.
And step 204, after receiving the switching request confirmation signaling, the source base station sends a switching command to the UE.
Here, the source base station sends a handover command to the UE by RRC connection reconfiguration carrying mobility control information.
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 complete signaling to the target base station.
Here, after receiving the handover completion signaling sent by the UE, the target base station triggers the core network to complete the handover of the network side path, so that the UE can continue to perform the service.
In this embodiment, the target base station performs resource allocation according to the uplink and downlink throughputs of the UE in the source cell, which is mainly because the service developed by the UE has correlation within a period of time, that is, the throughput before the UE is switched and the throughput after the UE is switched have great correlation (throughput is close), so that the target base station allocates resources to the UE according to the actual throughput of the UE, thereby ensuring that the UE does not cause service throughput reduction due to the influence of the UE, and enhancing user experience. In step 202, after receiving the handover request signaling, the target base station implements access control according to the quality of service parameter of the E-RAB established by the UE, and allocates resources to the UE according to the throughput of the UE in the source cell; other steps are the same as in the present embodiment.
The embodiment is applied to an LTE system, and the method is also applicable to a WCDMA system. In a WCDMA system, a Source Radio Network Controller (SRNC) where UE is located detects the throughput of the UE in a source cell, when the UE is switched, the SRNC sends an enhanced relocation request to a Target Radio Network Controller (TRNC) through an Iur interface, wherein the enhanced relocation request comprises the throughput of the UE in the source cell, and the TRNC implements access control and resource allocation according to the radio access bearer QoS established by the UE and the throughput of the UE in the source cell.
Example two:
in the LTE system, there is no X2 interface between the base station 1 and the base station 2, and the cells (Cell1 and Cell 2) governed by the base station 1 and the cells (Cell 3 and Cell 4) governed by the base station 2 are in a neighboring relationship with each other. The base station 1 and the base station 2 are any two base stations in the LTE system, and both the base stations are connected with the core network.
The UE is in a connection state in Cell1 (serving Cell or source Cell), and the radio access bearer E-RAB established by the UE is non-GBR service.
And the UE carries out measurement in the Cell1 according to the measurement configuration sent by the base station 1 and reports the measurement object meeting the reporting condition. At a certain moment, the UE reports to the base station 1 that the signal quality of the neighboring cells (Cell 3 and Cell 4) is higher than that of the serving Cell (Cell1) by a predetermined offset, and after receiving the measurement report, the base station 1 makes a handover decision, where the target Cell for handover is Cell 3. In this embodiment, the base station 1 is a source base station, the base station 2 is a target base station, and a specific handover procedure is shown in fig. 3, and includes the following steps:
step 301, the source base station sends a handover required signaling to the core network.
Here, the handover required signaling includes an identifier of the target cell, configuration information in the source cell, and the like. In order to implement the present invention, the handover required signaling also carries the throughput of the UE in the source cell.
Here, the source base station needs to detect the throughput of the UE all the time after the UE establishes the E-RAB, where the throughput can be represented by the capacity of a data packet transmitted to the UE (downlink) or received from the UE (uplink), and for the downlink, specifically, the throughput can be represented by the total data packet capacity transmitted to the UE/the time length of transmitting the data packet to the UE, and the unit is bit/second; for uplink, the total packet capacity sent by the receiving UE/the time length of sending the packet by the receiving UE may be specifically expressed, and the unit is bit/second. After the source base station detects and obtains the uplink and/or downlink throughput of the UE, the handover requirement signaling contains the parameter, and a new cell 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 300kbps and 500kbps, respectively.
Step 302, after receiving the handover required signaling, the core network sends a handover request signaling to the target base station.
The handover request signaling includes an identifier of a target cell, an identifier of an 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 possesses 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 performs access control according to the throughput of the UE in the source cell, and allocates resources to the UE.
Here, since the E-RAB established by the UE is a non-GBR service, the target base station cannot exactly know the size of the resource allocated to the UE (or the size of the reserved resource) only by using the QoS parameter, and in view of the fact that the handover request includes the throughput of the UE in the source cell, the target base station performs access control according to the QoS parameter and the uplink and downlink throughput of the UE in the source cell, and allocates or reserves the resource (including the radio resource, the hardware resource, and the S1 interface transport layer bandwidth resource) to the UE. In this embodiment, the idle resources of the target base station are sufficient to ensure the uplink and downlink throughputs (uplink 300kbps, downlink 500kbps) of the UE, so that the access control is successful. Specifically, if the target cell is a cell (cell composed of multiple component carriers) of carrier aggregation (carrier aggregation), the target base station allocates resources to the UE according to the uplink and downlink throughput of the UE in the source cell, including selecting carriers or allocating the number of carriers.
Step 304, the target base station sends a handover request acknowledgement signaling to the core network, where the handover request acknowledgement signaling includes resource information allocated by the target base station for the UE.
Step 305, the core network sends a handover command to the source base station.
Step 306, after receiving the handover command sent by the core network, the source base station sends the handover command to the UE.
Here, the source base station sends a handover command to the UE by RRC connection reconfiguration carrying mobility control information.
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 complete signaling to the target base station.
Here, after receiving the handover completion signaling sent by the UE, the target base station notifies the core network that the UE has been handed over to the target base station.
The embodiment is applied to an LTE system, and the method is also applicable to a WCDMA system. In WCDMA system, if there is no Iur interface between SRNC and TRNC, when UE switches, SRNC sends relocation request to TRNC through core network, and the request carries throughput of UE in source cell. And the TRNC implements access control and resource allocation according to the QoS of the radio access bearer established by the UE and the throughput of the UE in the source cell.
In the embodiment, the UE only establishes one E-RAB, if the UE establishes a plurality of E-RABs, the source base station detects the uplink and downlink throughputs of the E-RABs, the detected uplink and downlink throughputs of the E-RABs are sent to the target base station through the switching signaling during switching, and the target base station performs access control and resource allocation according to the QoS parameters of the E-RABs and the uplink and downlink throughputs of the UE. Specifically, if the same QoS Class Identification (QCI) exists in a plurality of E-RABs established by the UE or priority ARP is allocated and reserved, the base station calculates the total throughput of the E-RABs with the same QCI or ARP, the total throughput is included in the switching signaling, and the target base station uniformly implements access control and resource allocation on the E-RABs with the same QCI or ARP. Here, the total throughput of the uplink and the downlink is calculated separately, and the total throughput of the uplink and the downlink needs to be satisfied separately when the target base station performs access control.
Example three:
in the LTE system, an X2 interface exists between a base station 1 and a base station 2, and cells (Cell1 and Cell 2) governed by the base station 1 and cells (Cell 3, Cell 4, and Cell 5) governed by the base station 2 are in a neighboring Cell relationship. Base station 1 and base station 2 are any two base stations in the LTE system.
The UE is in a connected state in Cell1 (serving Cell, or source Cell), the radio access bearer E-RAB established by the UE is GBR service, the guaranteed bit rate of uplink and downlink is 500kbps (kilobits/second), and the maximum bit rate of uplink and downlink is 900 kbps.
And the UE carries out measurement in the Cell1 according to the measurement configuration sent by the base station 1 and reports the measurement object meeting the reporting condition. At a certain moment, the UE reports to the base station 1 that the signal quality of the neighboring cells (Cell 3, Cell 4, and Cell 5) is higher than that of the serving Cell (Cell1) by a predetermined offset, and the base station 1 makes a handover decision after receiving the measurement report, where the target Cell for handover is Cell 3. Since the signal quality of Cell 4 and Cell 5 measured by the UE is also good, the source base station carries the reconstruction information (reseabatshmentinfo) of the UE in Cell 4 and Cell 5 in the handover signaling, and the reconstruction information includes the Cell Radio Network Temporary identifier C-rnti (Cell Radio Network Temporary identifier) of the UE in the source Cell, the physical Cell identifier of the source Cell, the global identifier of the target Cell to be potentially reconstructed, and the encryption key KeNB of the UE in the target Cell to be potentially reconstructed*And a truncated message integrity authentication code (short MAC-I). In this embodiment, the base station 1 is a source base station, the base station 2 is a target base station, and handover is performedAs shown in fig. 4, the specific process includes the following steps:
step 401, the source base station sends a handover request signaling to the target base station.
Here, the handover request signaling includes an identifier of the target Cell, an identifier of an E-RAB established by the UE, QoS parameters, configuration information in the source Cell, and reestablishment information of the UE in Cell 4 and Cell 5. In order to implement the present invention, the handover request signaling also carries the throughput of the UE in the source cell.
Here, the source base station needs to detect the throughput of the UE all the time after the UE establishes the E-RAB, and the throughput may be represented by the capacity of a data packet transmitted (downlink) or received (uplink) to the UE in a unit time, or may be represented by the average packet capacity transmitted (downlink) or received (uplink) to the UE in a period of time, which may be a protocol default configuration or a configuration by the network side (source base station). In this embodiment, the source base station detects the average throughput within 10 seconds before the switching signaling is sent, and for downlink, the average throughput may specifically be represented as the total data packet capacity (or size)/10 seconds sent to the UE within 10 seconds before the switching signaling is sent by the source base station, and the unit is bit/second; specifically, for the uplink, the total packet capacity/10 seconds sent by the receiving UE within 10 seconds before the source base station sends the handover signaling may be expressed, and the unit is bit/second. After the source base station detects and obtains the uplink and/or downlink throughput of the UE, the handover request includes the parameter, and a new cell 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 600kbps and 700kbps, 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 to the UE.
Here, because the handover request signaling includes the QoS parameter for the UE to establish the E-RAB and the throughput of the uplink and downlink of the UE, and the throughput of the uplink and downlink of the UE is greater than the guaranteed bit rate of the uplink and downlink of the UE, the target base station finds that Cell 3 can meet the QoS parameter requirement for the UE to establish the E-RAB, but the resource of Cell 3 does not meet the requirementThe method can meet the requirements of the UE on the uplink and downlink throughputs of the source Cell, and meanwhile, the target base station finds that the resources of the Cell 4 can meet the requirements of the UE on the uplink and downlink throughputs of the source Cell, so that the target base station resets the switched target Cell, selects the Cell 4 as the target Cell, and distributes the resources. In step 401, the handover request includes information on the re-establishment of the UE in Cell 4 and Cell 5, so that the target base station considers that Cell 4 and Cell 5 can be the target Cell for handover of the UE, and the re-establishment information includes the encryption key KeNB*Therefore, the target base station can modify the target Cell (from Cell 3 to Cell 4).
Step 403, the target base station sends a handover request acknowledgement signaling to the source base station, where the handover request acknowledgement signaling includes resource information allocated by the target base station for the UE.
Step 404, after receiving the handover request acknowledgement signaling, the source base station sends a handover command to the UE.
Here, the source base station sends a handover command to the UE by RRC connection reconfiguration carrying mobility control information.
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 complete signaling to the target base station.
Here, after receiving the handover completion signaling sent by the UE, the target base station triggers the core network to complete the handover of the network side path, so that the UE can continue to perform the service.
In this embodiment, the target base station selects a cell capable of meeting the throughput for the UE according to the throughput of the UE in the source cell, so that a phenomenon that the throughput is reduced after the UE is switched is avoided, and user experience is enhanced.
Example four:
in the LTE system, an X2 interface exists between a base station 1 and a base station 2, and cells (Cell1 and Cell 2) governed by the base station 1 and cells (Cell 3 and Cell 4) governed by the base station 2 are in a neighboring Cell relationship. Base station 1 and base station 2 are any two base stations in the LTE system.
The UE is in a connected state in Cell1 (serving Cell, or source Cell), the radio access bearer E-RAB established by the UE is GBR service, the guaranteed bit rate of uplink and downlink is 500kbps (kilobits/second), and the maximum bit rate of uplink and downlink is 800 kbps.
And the UE carries out measurement in the Cell1 according to the measurement configuration sent by the base station 1 and reports the measurement object meeting the reporting condition. At a certain moment, the UE reports to the base station 1 that the signal quality of the neighboring cells (Cell 3 and Cell 4) is higher than that of the serving Cell (Cell1) by a predetermined offset, and the base station 1 makes a handover decision after receiving the measurement report, where the target Cell for handover is Cell 3. In this embodiment, the base station 1 is a source base station, the base station 2 is a target base station, and a specific handover procedure is similar to the flow chart shown in fig. 2, and includes the following steps:
step 501, a source base station sends a handover request signaling to a target base station.
Here, the handover request signaling includes an identifier of the target cell, an identifier of the E-RAB established by the UE, QoS parameters, configuration information in the source cell, and the like. In order to implement the present invention, the handover request signaling also carries the throughput of the UE in the source cell.
Here, the source base station needs to detect the throughput of the UE all the time after the UE establishes the E-RAB, where the throughput can be represented by the capacity of a packet transmitted to the UE (downlink) or received from the UE (uplink), and for the downlink, specifically, the throughput can be represented by the total packet capacity (or size) transmitted to the UE/the time length for transmitting the packet to the UE, and the unit is bit/second; for uplink, the total packet capacity sent by the receiving UE/the time length of sending the packet by the receiving UE may be specifically expressed, and the unit is bit/second. After the source base station detects and obtains the uplink and/or downlink throughput of the UE, the handover request includes the parameter, and a new cell is required to indicate the uplink and/or downlink throughput of the UE. In this embodiment, the actual throughput of the UE is low, and the uplink and downlink throughputs are 300kbps and 400kbps, 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 to the UE.
Here, because the handover request signaling includes the QoS parameter for establishing the E-RAB by the UE and the throughput of the uplink and downlink of the UE, and the throughput of the uplink and downlink of the UE is lower than the guaranteed bit rate of the uplink and downlink of the UE, the target base station finds that the resource of the Cell 3 cannot meet the QoS requirement for establishing the E-RAB by the UE, but can meet the requirement for the throughput of the uplink and downlink of the UE in the source Cell, and the target base station allocates the resource or reserves the resource (including the wireless resource, the hardware resource and the S l interface transport layer bandwidth resource) for the UE according to the throughput of the uplink and downlink of the UE in the source Cell. In this embodiment, the idle resources of the target base station are sufficient to ensure the uplink and downlink throughputs (uplink 300kbps, downlink 400kbps) of the UE, so that the access control is successful.
Step 503, the target base station sends a handover request acknowledgement signaling to the source base station, where the handover request acknowledgement signaling includes resource information allocated by the target base station for the UE.
Step 504, after receiving the handover request acknowledgement signaling, the source base station sends a handover command to the UE.
Here, the source base station sends a handover command to the UE by RRC connection reconfiguration carrying mobility control information.
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 complete signaling to the target base station.
After receiving the switching completion signaling sent by the UE, the target base station triggers the core network to complete the switching of the network side path, so that the UE can continue to carry out the service.
In this embodiment, the target base station implements access control according to the throughput of the UE in the source cell to allocate or reserve resources for the UE when the resources cannot meet the QoS requirement of the E-RAB established by the UE, thereby avoiding handover failure due to insufficient resources. If the handover fails and the UE measures poor signal quality of the source cell, the UE connection may be interrupted, which may affect the user experience.
An access control system at handover, the system comprising: the access control unit is used for implementing access control according to the throughput of the user equipment in the source cell or the service quality parameter of the wireless access bearer under the condition that the target network side receives the switching signaling from the source network side; 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 throughput of the user equipment uplink in the source cell and/or the throughput of the user equipment downlink in the source cell.
Here, the throughput of the user equipment uplink on the source cell includes: the total packet capacity sent by the receiving user equipment is divided by the length of time that the receiving user equipment sends the packets, or the average packet capacity sent by the receiving user equipment over a period of time.
Here, the throughput of the user equipment in the downlink of the source cell includes: the total packet capacity transmitted to the user equipment divided by the length of time the packet was transmitted to the user equipment, or the average packet capacity transmitted to the user equipment over a period of time.
Here, the period of time is configured by protocol default or by the source network side.
Here, the access control unit is further configured to allocate or reserve resources for the user equipment when performing 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:
the concrete implementation is as follows: and 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, implement access control by the target network side according to the throughput of the user equipment in the source cell, and allocate or reserve resources for the user equipment.
The concrete implementation is as follows: and the access control unit is further used for implementing access control by the target network side according to the service quality parameter of the radio access bearer when the throughput of the user equipment in the source cell is greater than the guaranteed bit rate in the service quality parameter of the radio access bearer, and allocating or reserving resources for the user equipment by using the throughput of the user equipment in the source cell under the condition that the resources are allowed.
The concrete implementation is three: and when the service quality parameters of the wireless access bearer in the switching signaling do not comprise 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 allocates or reserves resources for the user equipment.
The concrete implementation is four: and when the target cell contained in the switching signaling can not meet the throughput of the user equipment in the source cell, the target network side selects the target cell meeting the throughput requirement of the user equipment in the source cell for the user equipment.
The concrete implementation is five: and when the throughput of the user equipment in the source cell is greater than the guaranteed bit rate in the service quality parameters of the wireless access bearer, 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 by using the throughput of the user equipment in the source cell.
Here, the following description will be made with respect to chinese and english in the above text: the RRC connection Reconfiguration is expressed in RRCConnection Reconfiguration; the mobile control information is represented by mobilityControlInfo; the switching Request is represented by a Handover Request; the Handover requirement is expressed in Handover Required; the Handover Request confirmation is expressed by a Handover Request acknowledgement; handover completion is expressed in RRC ConnectionReconfiguration Complete; the Enhanced Relocation Request is represented by an Enhanced Relocation Request; the Handover Command is denoted as Handover Command.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (14)

1. An access control method in handover, the method comprising:
the source network side sends a switching signaling to the target network side; the handover signaling comprises throughput of the user equipment in the source cell;
and after receiving the switching signaling, the target network side implements access control according to the throughput of the user equipment in the source cell or the service quality parameter of the wireless access bearer.
2. The method of claim 1, wherein the throughput of the user equipment in the source cell comprises: the throughput of the user equipment uplink in the source cell and/or the throughput of the user equipment downlink in the source cell.
3. The method of claim 2, wherein the throughput of the user equipment uplink on the source cell comprises: the total packet capacity sent by the receiving user equipment is divided by the length of time that the receiving user equipment sends the packets, or the average packet capacity sent by the receiving user equipment over a period of time.
4. The method of claim 2, wherein the throughput of the ue in downlink at the source cell comprises: the total packet capacity transmitted to the user equipment divided by the length of time the packet was transmitted to the user equipment, or the average packet capacity transmitted to the user equipment over a period of time.
5. The method according to claim 3 or 4, wherein the period of time is configured by protocol default or by the source network side.
6. The method of claim 1, further comprising: and when the access control is implemented according to the throughput of the user equipment in the source cell or the service quality parameter of the wireless access bearer, allocating or reserving resources for the user equipment.
7. The method of claim 6, wherein when the throughput of the user equipment in a source cell is less than or equal to a guaranteed bit rate or a maximum bit rate in a quality of service parameter of the radio access bearer, the allocating or reserving resources for the user equipment when implementing the access control specifically comprises: the target network side implements access control according to the throughput of the user equipment in a source cell, and allocates or reserves resources for the user equipment; or,
when the throughput of the ue in the source cell is greater than the guaranteed bit rate in the qos parameter of the radio access bearer, the allocating or reserving resources for the ue when performing the access control specifically includes: the target network side implements access control according to the service quality parameters of the wireless access bearer, and under the condition of resource permission, the throughput of the user equipment in a source cell is used for allocating or reserving resources for the user equipment; or,
when the qos parameter of the radio access bearer in the handover signaling does not include the guaranteed bit rate and the maximum bit rate, the allocating or reserving resources for the ue when performing the access control specifically includes: the target network side implements access control according to the throughput of the user equipment in a 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 ue in the source cell, the allocating or reserving resources for the ue when performing the access control specifically includes: the target network side selects a target cell which meets the throughput requirement of the user equipment in a source cell for the user equipment; or,
when the throughput of the ue in the source cell is greater than the guaranteed bit rate in the qos parameter of the radio access bearer, the allocating or reserving resources for the ue when performing the access control specifically includes: and 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. An access control system at handover, comprising: the access control unit is used for implementing access control according to the throughput of the user equipment in the source cell or the service quality parameter of the wireless access bearer under the condition that the target network side receives the switching signaling from the source network side; wherein the throughput of the user equipment in the source cell is included in the handover signaling.
9. The system of claim 8, wherein the throughput of the user equipment in the source cell comprises: the throughput of the user equipment uplink in the source cell and/or the throughput of the user equipment downlink in the source cell.
10. The system of claim 9, wherein the throughput of the user equipment uplink on the source cell comprises: the total packet capacity sent by the receiving user equipment is divided by the length of time that the receiving user equipment sends the packets, or the average packet capacity sent by the receiving user equipment over a period of time.
11. The system of claim 9, wherein the throughput of the ue in the downlink of the source cell comprises: the total packet capacity transmitted to the user equipment divided by the length of time the packet was transmitted to the user equipment, or the average packet capacity transmitted to the user equipment over a period of time.
12. The system according to claim 10 or 11, wherein the period of time is configured by protocol default or by the source network side.
13. The system of claim 8, wherein the access control unit is further configured to allocate or reserve resources for the ue when performing the access control according to the throughput of the ue in the source cell or the quality of service parameter of the radio access bearer.
14. The system of 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 guaranteed bit rate or the maximum bit rate in the quality of service parameter of the radio access bearer, perform access control on the target network side according to the throughput of the user equipment in the source cell to allocate or reserve 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 service quality parameters of the wireless access bearer, the target network side implements access control according to the service quality parameters of the wireless access bearer, and under the condition of resource permission, the throughput of the user equipment in the source cell is used for allocating or reserving resources for the user equipment; or,
when the service quality parameters of the wireless access bearer in the switching signaling do not comprise 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 allocates or reserves resources for the user equipment; or,
when a target cell contained in a handover signaling cannot meet the throughput of the user equipment in a source cell, selecting the target cell meeting the throughput requirement of the user equipment in the source cell for the user equipment by the target network side; or,
when the throughput of the ue in the source cell is greater than the guaranteed bit rate in the qos parameter of the radio access bearer, the allocating or reserving resources for the ue when performing the access control specifically includes: and 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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