WO2014000464A1 - Admission control method and device - Google Patents

Abstract

Provided are an admission control method and device, which relate to the field of communications, and can solve the problem of network congestion caused by inconsistent management of bandwidths on two sides of a heterogeneous network, and improve the transmission quality of network service. The method comprises: any network element at both ends of a network calculating a physical layer bandwidth occupied by a current service data stream, the remaining bandwidth in the link of the network element and a bandwidth occupied by a new service, and when the remaining bandwidth in the link is smaller than the bandwidth occupied by the new service, generating bandwidth information, and sending same to an admission control device; in accordance with the bandwidth information, the admission control device generating admission information, and sending same to network elements at both ends of the network, the admission information carrying an instruction to stop the new service from accessing; and the network elements at both ends of the network receiving the admission information sent by the admission control device, and stopping the new service from accessing in accordance with the admission information. The embodiments of the present invention are applied to control the access of a new network service.

Description

 The present invention claims the priority of a Chinese patent application filed on June 26, 2012 by the Chinese Patent Office, Application No. 201210213654.3, entitled "A Method and Apparatus for Access Control". The entire contents are incorporated herein by reference.

Technical field

 The present invention relates to the field of communications, and in particular, to an admission control method and apparatus.

Background technique

 There is a transmission conversion device between the BSC (Base Station Controller) and the BTS (Base Transceiver Station). The link type on the BSC side and the link type on the BTS side are inconsistent. The same service data is on the BSC side. The link layer headers used by the BTS side have different overheads, and the actual occupied physical bandwidth is different, which brings difficulties for bandwidth management and call admission control.

 The call service data passes through the BSC side and the BTS side. Assume that the link types on both sides are the same, the head overhead for transmitting service data is the same, and the fixed head overhead and bandwidth are deducted for each service. The BSC side and the BTS side are configured with the same physical bandwidth, and each time access to one service is allowed to deduct a fixed bandwidth.

At least the following problems exist in the prior art: In a heterogeneous networking scenario, the link head overhead actually used by the same service data flow on the BSC side is not the same as the link head overhead actually used on the BTS side, and the two sides actually occupy the same The physical bandwidth is different. The physical bandwidth configuration of the links on both sides is the same. After each service data stream is deducted by the same fixed bandwidth, the actual occupied bandwidth on one side is used up and congestion occurs, and the remaining bandwidth is logically available. It can also allow service access, which in turn leads to network congestion and affects the quality of existing services. Summary of the invention

 The embodiment of the present invention provides an admission control method and device, which can solve the problem of network congestion caused by inconsistent bandwidth management on both sides of a heterogeneous network, make bandwidth resource management more accurate, reduce congestion, and improve network service quality.

 To achieve the above objective, the embodiment of the present invention adopts the following technical solutions: On the one hand, an admission control method is provided, including:

 The access control device acquires bandwidth information generated according to respective link types and compression multiplexing types of the network elements at both ends of the network when the network has new service access;

 Generating the admission information to the network elements at both ends of the network according to the bandwidth information, where the admission information carries an instruction to stop the new service access, so that the network element stops the according to the admission information. Access to new services.

 Optionally, the admission control device sends the network element at both ends of the receiving network before acquiring the bandwidth information generated according to the link type and the compression multiplexing type of the network elements at both ends of the network when the network has a new service access. The respective link types and compression multiplexing types of the network elements.

 Optionally, the obtaining, by the admission control device, the bandwidth information generated according to the link type and the compression multiplexing type of the network elements at both ends of the network when the network has new service access includes:

 Calculating, according to the link type and the compression multiplexing type of the network element, a physical layer bandwidth occupied by a current service data flow in each link of the network element;

Calculating the remaining bandwidth in the respective links of the network element according to the physical layer bandwidth occupied by the current service data flow in the respective links of the network element, and calculating the bandwidth occupied by the new service, when the network elements at both ends of the network The bandwidth information is generated when the remaining bandwidth of any of the remaining bandwidths of the respective links is smaller than the bandwidth occupied by the new service. Optionally, the bandwidth information may include: a bandwidth occupied by the new service and a link remaining bandwidth of a network element at least one end of the network, where a link remaining bandwidth of the network element at least one end of the network is smaller than the The bandwidth occupied by the new service.

 A method of admission control is also provided, including:

 Calculating, by the network element at the two ends of the network, the physical layer bandwidth occupied by the current service data flow in the network element link according to the link type and the compression multiplexing type of the network element;

 The network element calculates the remaining bandwidth in the link according to the physical layer bandwidth occupied by the current service data flow, and calculates the bandwidth occupied by the new service, where the remaining bandwidth in the link is smaller than the bandwidth occupied by the new service. Generating bandwidth information and transmitting to the admission control device;

 Receiving the admission information sent by the admission control device, wherein the admission information carries an instruction to stop the new service access, and stops accessing the new service according to the admission information.

 Optionally, the bandwidth information may include: a bandwidth occupied by the new service and a link remaining bandwidth of a network element at least one end of the network, where a link remaining bandwidth of the network element at least one end of the network is smaller than the The bandwidth occupied by the new service.

 On the other hand, an admission control apparatus is provided, including: an obtaining unit, configured to acquire, according to a link type of each network element at both ends of the network, when the network has new service access; a bandwidth information generated by the compression multiplexing type; a sending unit, configured to generate, according to the bandwidth information, the access information to be sent to the network elements at both ends of the network, where the admission information carries an instruction to stop the new service access, So that the network element stops accessing the new service according to the admission information.

 Optionally, the device may further include:

The receiving unit is configured to receive a link type and a compression multiplexing type of the network element that are sent by the network element at both ends of the network. Optionally, the acquiring unit may include:

 a calculation subunit, configured to calculate, according to a link type and a compression multiplexing type of the network element, a physical layer bandwidth occupied by a current service data flow in each link of the network element;

 a determining sub-unit, configured to calculate, according to a physical layer bandwidth occupied by a current service data flow in a respective link of the network element, a remaining bandwidth in a respective link of the network element, and calculate a bandwidth occupied by the new service, where The bandwidth information is generated when the remaining bandwidth of any of the remaining links of the network elements at the two ends of the network is smaller than the bandwidth occupied by the new service.

 A network element is also provided, including:

 a calculating unit, configured to calculate, according to a link type and a compression multiplexing type of the network element, a physical layer bandwidth occupied by a current service data flow in the network element link;

 a determining unit, configured to calculate, by the network element, a remaining bandwidth in the link according to a physical layer bandwidth occupied by the current service data flow, and calculate a bandwidth occupied by the new service, where a remaining bandwidth in the link is smaller than the When the bandwidth occupied by the new service is generated, bandwidth information is generated and sent to the admission control device;

 An access control unit, configured to receive the admission information sent by the admission control device, where the admission information carries an instruction to stop the new service access, and stops the new service according to the admission information. Access.

 Optionally, the network element may be a base transceiver station or a base station controller.

 An embodiment of the present invention provides an admission control method and apparatus. By introducing admission information, when the remaining bandwidth of any link of the network is less than the bandwidth occupied by a new service, the access of the new service is stopped, and the heterogeneous network can be solved. The problem of network congestion caused by inconsistent bandwidth management on both sides makes bandwidth resource management more accurate, reduces congestion, and improves network service quality.

DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

 FIG. 1 is a schematic flowchart of an admission control method according to an embodiment of the present invention; FIG. 2 is a schematic flowchart of another admission control method according to an embodiment of the present invention; FIG. 4 is a schematic structural diagram of another admission control apparatus according to an embodiment of the present invention; FIG. 5 is a schematic structural diagram of another admission control apparatus according to an embodiment of the present invention; A schematic diagram of a network element structure provided.

detailed description

 The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

 An admission control method provided by an embodiment of the present invention, as shown in FIG. 1, includes the following steps:

 S101: The network element at the two ends of the network calculates the physical layer bandwidth occupied by the current service data flow in the network element link according to the link type and the compression multiplexing type of the network element.

Optionally, the network elements at both ends of the network are respectively a base transceiver station base BTS and a base station controller BSC. In addition, the respective link types of the network elements at both ends of the network may include various types such as: ATM (asynchronous transfer mode) / PPP (oint-to-point) Protocol, point-to-point protocol) /ML PPP (multilink-PPP, multilink point-to-point protocol) /FE (fast Ethernet), GE (giga ethernet), etc., compression multiplexing type such as IPHC (IP) Header compression, IP packet header compression) /PPP MUX (Point-to-Point Protocol mutiplex) / FP MUX (frame processing multiplex). Of course, the network here can be a wired access network or a wireless access network.

 Before performing S101, according to the prior art, the transmission physical bandwidth allowed to be accessed between network elements at both ends of the network and the application layer payload bandwidth occupied by one data stream in different types of services in the network are first configured, and the network is assumed to be wireless. CDMA (Code Division Multiple Access) system, of course, the present invention is also applicable to TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), CDMA2000 (third generation CDMA system), WCDMA (Wideband Code Division Multiple Access), LTE (Long Term Evolution), TD-LTE (Time Division-Long Term Evolution), and other standards The radio access network allows the access physical bandwidth to be 2M, and configures the application layer payload bandwidth occupied by one data stream in the CDMA2000 IX type service to be 8 Kbps, assuming that the link type connected to the base transceiver station is El, and The link type of the link connected to the base station controller is GE. The head overhead bandwidth of the GE link is 31Kbps, if the FP MUX compression multiplexing type technology is used, the head overhead bandwidth is 11Kbps, and the head overhead bandwidth of the El link PPP protocol is 17Kbps. If the FP MUX compression multiplexing type is used, the header overhead bandwidth is 12 Kbps.

 The base transceiver station calculates the physical layer bandwidth occupied by one service data stream in the current link: 12Kbps+8Kbps, that is, 20Kbps; the base station controller calculates the physical layer bandwidth occupied by one service data stream in the current link: l lKbps+8Kbps , that is, 19Kbps.

S102: The network element calculates the remaining bandwidth in the link according to the physical layer bandwidth occupied by the current service data flow, and calculates the bandwidth occupied by the new service, where the remaining bandwidth in the link is smaller than When the bandwidth occupied by the new service is generated, bandwidth information is generated and sent to the admission control device.

 Exemplarily, when the network has new service access, the admission control device calculates the remaining bandwidth in the respective links according to the physical layer bandwidth actually occupied by the network elements.

 Assuming that 102 voice services have been accessed at this time, the remaining bandwidth of the E1 link on the base transceiver station side is 2048 Kbps-102*20 Kbps, that is, 8 Kbps; the remaining bandwidth of the GE link on the base station controller side is 2048 Kbps-102*19 Kbps, that is, 110 Kbps. At this time, the remaining bandwidth of the El link using the FP MUX multiplexing technology cannot access the 103rd CDMA2000 IX voice service, but the remaining bandwidth of the GE link using the FP MUX multiplexing technology can also access the multi-channel CDMA2000 IX voice service. , the generated bandwidth information is sent to the admission control device. The bandwidth information may include: a bandwidth occupied by the new service and a link remaining bandwidth of the network element at the other end of the network, and the remaining bandwidth of the link of the network element is smaller than the bandwidth occupied by the new service.

 5103. The admission control device acquires bandwidth information generated according to respective link types and compression multiplexing types of network elements at both ends of the network when the network has new services.

 5104. The admission control device generates the admission information according to the bandwidth information and sends the information to the network element at both ends of the network, where the admission information carries an instruction to stop the new service access.

 Therefore, the network element stops accessing the new service according to the admission information; at this time, the entire network does not allow the 103rd CDMA2000 IX voice service to be accessed, and the admission control device generates the admission information to the network elements at both ends of the network.

 5105. The network element at both ends of the network receives the admission information sent by the admission control device, and stops the access of the new service according to the admission information.

 Of course, the network element specifically stops the access of the new service according to the instruction of stopping the access of the new service carried in the admission information.

An embodiment of the present invention provides an admission control method, where bandwidths are respectively managed by network elements at both ends of the network, and admission control information is generated by the admission control device, which has more than two ends. When the new service of the remaining bandwidth in any link of the network element is accessed, the control stops the access of the new service, so as to reduce link congestion, improve network service quality, and improve user experience.

 An embodiment of the present invention provides an admission control method. As shown in FIG. 2, the method includes: S201: A network element at both ends of the network sends a link type and a compression multiplexing type of the network element to the admission control apparatus.

 Optionally, the network elements at both ends of the network are a base transceiver station base BTS and a base station controller BSC. In addition, the link types of the network elements at both ends of the network may include various types such as: ATM (asynchronous transfer mode) / PPP (oint-to-point protocol) / ML PPP (multilink-PPP, multi-chain Road-to-point protocol) /FE (fast Ethernet), GE (giga ethernet), etc., compression multiplexing type such as IPHC (IP header compression) / PPP MUX (Point- to-Point Protocol mutiplex, point-to-point multiplexing protocol) /FP MUX (frame processing multiplex). Of course, the network here can be a wired access network or a wireless access network.

Before performing S201, according to the prior art, it is first required to configure the transmission physical bandwidth allowed between the network elements at both ends of the network and the application layer payload bandwidth occupied by one data stream in different types of services in the network, assuming that the network is wireless. Access network CDMA (Code Division Multiple Access) system, of course, the present invention is also applicable to other types of radio access networks such as TD-SCDMA, CDMA2000, WCDMA, LTE, TD-LTE, etc., allowing access The physical bandwidth of the transmission is 2M, and the application layer payload bandwidth occupied by one data stream in the CDMA2000 IX type service is 8Kbps. It is assumed that the link type connected to the base transceiver station is El, and the link type connected to the base station controller is GE. The head overhead bandwidth of the GE link is 31 Kbps, and the head overhead bandwidth of the El link is 17 Kbps. The head link bandwidth of the GE link is 31 Kbps. If the FP MUX compression multiplexing type technology is used, the head overhead bandwidth is 11 Kbps. The head overhead bandwidth of the El link PPP protocol is 17Kbps. If the FP MUX compression multiplexing type is used, the head overhead bandwidth is 12 Kb so

 5202. The admission control device receives a link type and a compression multiplexing type of the network element sent by the network element at both ends of the network.

 5203. The admission control device calculates, according to the link type and the compression multiplexing type of the network element, the physical layer bandwidth occupied by the current service data flow in the respective links of the network element.

 The admission control device calculates the physical layer bandwidth occupied by one service data stream in the current link of the base transceiver station: 12 Kbps + 8 Kbps, that is, 20 Kbps; the base station controller calculates the physical layer bandwidth occupied by one service data flow in the current link: lKbps+8Kbps, which is 19Kbps.

 5204. The admission control device calculates the remaining bandwidth in the respective links of the network element according to the physical layer bandwidth occupied by the current service data flow in the respective links of the network element, and calculates the bandwidth occupied by the new service, when the network elements at the two ends of the network respectively The bandwidth information is generated when the remaining bandwidth of any link in the remaining bandwidth of the link is smaller than the bandwidth occupied by the new service.

 Assuming that 102 voice services have been accessed at this time, the remaining bandwidth of the E1 link on the base transceiver station side is 2048 Kbps-102*20 Kbps, that is, 8 Kbps; the remaining bandwidth of the GE link on the base station controller side is 2048 Kbps-102*19 Kbps, that is, 110 Kbps. At this time, the remaining bandwidth of the E1 link using the FP MUX multiplexing technology cannot access the 103rd CDMA XI voice service, but the remaining bandwidth of the GE link using the FP MUX multiplexing technology can also access the multi-channel CDMA2000 IX voice service. , the generated bandwidth information is sent to the admission control device. The bandwidth information may include: a bandwidth occupied by the new service and a link remaining bandwidth of the network element at the other end of the network, and the remaining bandwidth of the link of the network element is smaller than the bandwidth occupied by the new service.

 5205. The admission control device generates the admission information according to the bandwidth information and sends the information to the network element at both ends of the network, where the admission information carries an instruction to stop the new service access.

5206. The network element receives the admission information sent by the admission control device, and stops accessing the new service according to the admission information. An embodiment of the present invention provides an admission control method, which performs bandwidth management on a network element of a network at both ends of a network through an admission control device, and accesses a new service with remaining bandwidth in any link where the network elements of both ends are located. Control to stop the access of the new service to reduce link congestion, improve network service quality, and enhance user experience.

 An embodiment of the present invention provides an admission control apparatus 3, as shown in FIG. 3, including: an obtaining unit 31 and a sending unit 32, where:

 The obtaining unit 31 is configured to: when the network has a new service access, obtain the bandwidth information generated according to the link type and the compression multiplexing type of the network elements at the two ends of the network; the sending unit 32 is configured to generate, according to the bandwidth information, The access information is sent to the network elements at both ends of the network, where the admission information carries an instruction to stop the new service access, so that the network element stops the access of the new service according to the admission information.

 The access control device provided by the embodiment of the present invention obtains the bandwidth information of the network elements at both ends of the network and generates the access information, and performs bandwidth management on the network elements at both ends of the network, where any network element having more than two ends is located. When the new service of the remaining bandwidth in the path is accessed, the control stops the access of the new service, so as to reduce link congestion, improve network service quality, and improve user experience.

 Further, as shown in FIG. 4, the admission control device 3 further includes: a receiving unit

30,

 The receiving unit 30 is configured to receive a link type and a compression multiplexing type of the network element that are sent by the network element at both ends of the network;

 Further, as shown in FIG. 5, the obtaining unit 31 further includes: a calculating sub-unit 311 and a determining sub-unit 312,

 The calculating sub-unit 311 is configured to calculate, according to the link type and the compression multiplexing type of the network element, the physical layer bandwidth occupied by the current service data flow in the respective links of the network element;

The determining sub-unit 312 is configured to occupy the current service data flow according to the respective links of the network element The physical layer bandwidth is used to calculate the remaining bandwidth in the respective links of the network element, and calculate the bandwidth occupied by the new service. When the remaining bandwidth of any link in the remaining bandwidth of the network elements at both ends of the network is smaller than the bandwidth occupied by the new service, the network bandwidth is generated. Bandwidth information.

 The bandwidth information may include: a bandwidth occupied by the new service and a link remaining bandwidth of the network element at the other end of the network, and the remaining bandwidth of the link of the network element is smaller than the bandwidth occupied by the new service.

 In this way, the access control device can uniformly perform bandwidth management on the network elements of the network, and control to stop the access of the new service when the new service with the remaining bandwidth in any link where the network elements of the two ends are located is connected. To reduce link congestion, improve network service quality, and enhance user experience.

 The embodiment of the present invention provides a network element 5, as shown in FIG. 6, comprising: a computing unit 51, a determining unit 52, and an access control unit 53, wherein:

 The calculating unit 51 is configured to calculate, according to the link type and the compression multiplexing type of the network element, a physical layer bandwidth occupied by a current service data flow in the link of the network element;

 The determining unit 52 is configured to calculate, by the network element, the remaining bandwidth in the link according to the physical layer bandwidth occupied by the current service data flow, and calculate the bandwidth occupied by the new service. When the remaining bandwidth in the link is smaller than the bandwidth occupied by the new service, Generating bandwidth information and transmitting to the admission control device;

 The access control unit 53 is configured to receive the admission information sent by the admission control device, where the admission information carries an instruction to stop the new service access, and stops the access of the new service according to the admission information.

 The bandwidth information may include: a bandwidth occupied by the new service and a link remaining bandwidth of the network element at the other end of the network, and the remaining bandwidth of the link of the network element is smaller than the bandwidth occupied by the new service.

The embodiment of the invention provides a network element, by managing its own bandwidth, and then by The admission control device generates the admission control information, and controls to stop the access of the new service when the network has a new service access with the remaining bandwidth in any of the links where the network elements of the two ends are located, so as to reduce link congestion and improve network services. Quality, enhance user experience.

 The network element provided in the above embodiment is a base transceiver station BTS or a base station controller BSC. A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The method includes the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

 The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

Rights request 1. An access control method, characterized by including: The admission control device obtains bandwidth information generated based on the respective link types and compression multiplexing types of the network elements at both ends of the network when a new service is accessed in the network; Admission information is generated according to the bandwidth information and sent to the network elements at both ends of the network, where the admission information carries an instruction to stop the new service access, so that the network element stops the new service access based on the admission information. Access to new services. 2. The method according to claim 1, characterized in that, when a new service is accessed by the network, the admission control device obtains the link type and compression multiplexing type generated by the network elements at both ends of the network. Bandwidth information further includes: The admission control device receives the respective link types and compression multiplexing types of the network elements sent by the network elements at both ends of the network. 3. The method according to claim 2, characterized in that, when a new service is accessed by the network, the admission control device obtains the bandwidth generated according to the respective link types and compression multiplexing types of the network elements at both ends of the network. Information includes: Calculate the physical layer bandwidth occupied by the current service data flow in the respective links of the network elements according to the respective link types and compression multiplexing types of the network elements; Calculate the remaining bandwidth in each link of the network element according to the physical layer bandwidth occupied by the current service data flow in the respective link of the network element, and calculate the bandwidth occupied by the new service. When the network elements at both ends of the network Bandwidth information is generated when the remaining bandwidth of any of the respective link remaining bandwidths is less than the bandwidth occupied by the new service. 4. The method according to any one of claims 1 to 3, characterized in that, the bandwidth information includes: the bandwidth occupied by the new service and the link remaining bandwidth of the network element at at least one end of the network, wherein the The remaining bandwidth of the link of the network element at at least one end of the network is smaller than the bandwidth occupied by the new service. 5. An access control method, characterized by including: Any network element at both ends of the network calculates the physical layer bandwidth occupied by the current service data flow in the network element link based on the link type and compression multiplexing type of the network element; The network element calculates the remaining bandwidth in the link based on the physical layer bandwidth occupied by the current service data flow, and calculates the bandwidth occupied by the new service. When the remaining bandwidth in the link is less than the bandwidth occupied by the new service when, generate bandwidth information and send it to the admission control device; Receive admission information sent by the admission control device, where the admission information carries an instruction to stop access to the new service, and stop access to the new service according to the admission information. 6. The method according to claim 5, characterized in that the bandwidth information includes: the bandwidth occupied by the new service and the link remaining bandwidth of the network element at at least one end of the network, wherein the network is at least The remaining bandwidth of the link of the network element at one end is less than the bandwidth occupied by the new service. 7. An access control device, characterized by including: The acquisition unit is used for the admission control device to acquire the bandwidth information generated based on the respective link types and compression multiplexing types of the network elements at both ends of the network when a new service is accessed by the network; the sending unit is used for obtaining the bandwidth information based on the bandwidth The information generates admission information and sends it to network elements at both ends of the network, where the admission information carries an instruction to stop access to the new service, so that the network element stops access to the new service based on the admission information. enter. 8. The device according to claim 7, characterized in that the device further includes: a receiving unit, configured to receive the respective link types and compression multiplexing types of the network elements sent by the network elements at both ends of the network. 9. The device according to claim 8, characterized in that, the acquisition unit includes: a calculation subunit, configured to calculate the data according to the respective link types and compression multiplexing types of the network elements. Calculate the physical layer bandwidth occupied by the current service data flow in the respective links of the network elements; The decision subunit is used to calculate the physical layer bandwidth occupied by the current service data flows in the respective links of the network elements. The remaining bandwidth in the respective links, and calculate the bandwidth occupied by the new service, when the remaining bandwidth of any one of the remaining bandwidths of the respective links of the network elements at both ends of the network is less than the bandwidth occupied by the new service Bandwidth information is generated. 10. A network element, characterized by: including: A calculation unit configured to calculate the physical layer bandwidth occupied by the current service data flow in the network element link according to the link type and compression multiplexing type of the network element; A determination unit configured for the network element to calculate the remaining bandwidth in the link based on the physical layer bandwidth occupied by the current service data flow, and to calculate the bandwidth occupied by the new service. When the remaining bandwidth in the link is less than the When the bandwidth occupied by a new service is determined, bandwidth information is generated and sent to the admission control device; Access control unit, configured to receive admission information sent by the admission control device, where the admission information carries an instruction to stop access to the new service, and to stop access to the new service according to the access information. access. 11. The network element according to claim 10, characterized in that the network element is a base transceiver station or a base station controller.