WO2017028727A1 - Signalling receiving method and device for base station - Google Patents

Abstract

A signalling receiving method for a base station, comprising: setting the size of a receiving window of a reliable communication process of a base station according to the magnitude of signalling traffic between the base station and a controller; and when the base station receives signalling, controlling the enlarging of the receiving window according to the signalling processing capability of a CPU of the base station. The embodiments of the present invention associate the signalling receiving capacity of a base station with the signalling processing capability of a CPU, the signalling processing capability of the CPU restrains the signalling receiving capacity, thus restraining the transmitting capability of a source, which can smoothly control the CPU load of the base station; moreover, with the increase of CPU load, the traffic of signalling transmitted by the source decreases gradually, a mode of discarding signalling does not need to be adopted, and therefore, for a system, it is more smooth and more lossless.

Description

Signaling receiving method and device for base station Technical field

The invention relates to, but is not limited to, the field of communication network or computer network technology, and relates to a signaling receiving method and device of a base station.

Background technique

With the development of communication technologies, the use of wireless mobile communication systems is becoming wider and wider, and the number of mobile phones is increasing. A wireless mobile communication system is composed of a controller and a base station system. A controller manages a plurality of base station systems and is connected to the core network to complete management of logical resources of the base station system. The base station system completes the processing of the link layer and the physical layer in the wireless mobile communication system, and the mobile phone accesses the wireless mobile communication network through the base station system.

The base station system is composed of a baseband system and a radio frequency system, and is operated by an embedded real-time operating system. The CPU (Central Processing Unit) needs to complete the international standard protocol processing and related internal resource management work between the controllers. The interface between the base station system and the controller is generally an international standard established by the ITU. It is carried on a protocol of reliable communication. The form is a finite automatic state machine, describing the state under which the message is received. What kind of treatment.

With the increase in the number of users and traffic, as well as some holidays, peak hours, competitions and other scenarios, the CPU impact on the base station system is also increasing, and reasonable control of the base station system CPU has become an important issue. In the traditional CPU control method, each process is independently controlled. When the CPU is close to the threshold, only the top-level protocol process is generally processed. The method is to actively discard the signaling, thereby reducing the CPU load.

However, the above conventional CPU control method has some shortcomings: since each process is processed independently, the overall linkage effect is not achieved, for example, the protocol processing process is discarding the signaling, but the protocol process of reliable communication is still receiving and waiting to be processed. Signaling; secondly, because the control method is only passively discarded, although it does not cause CPU overload, but some users' perceptions are affected, and randomness is present, and important signaling of some important users may also be discarded. The smooth control of the CPU can not suppress the source.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiments of the present invention provide a signaling receiving method and apparatus for a base station, which solves the problem that the related technology cannot achieve smooth control of the CPU and cannot suppress the signaling source when receiving signaling.

An embodiment of the present invention provides a signaling receiving method of a base station, where the method includes:

Setting a receiving window size of the reliable communication process of the base station according to a size of signaling traffic between the base station and the controller;

When the base station receives signaling, the expansion of the receiving window is controlled according to the capability of the central processing unit CPU of the base station to process signaling.

Optionally, setting the receiving window size of the reliable communication process of the base station according to the size of the signaling traffic between the base station and the controller comprises: initializing the receiving according to a service size between the base station and the controller The window size, through the establishment of a reliable communication link.

Optionally, the method further includes: after establishing a reliable communication link, the controller acquires an initial receiving sequence number and a receiving window size of the base station, where the number of packets that the controller can continuously send at one time cannot exceed The receiving window size.

Optionally, when the base station receives signaling, according to the capability of the central processing unit CPU of the base station to process signaling, controlling the expansion of the receiving window includes: processing, by the base station, a message sent by the controller After the order, the receiving window size is enlarged.

Optionally, after the base station processes the signaling sent by the controller, expanding the receiving window includes:

Receiving signaling sent by the controller;

When the sequence number carried by the received signaling is the same as the sequence number expected by the base station, the signaling is processed, and the base station expects the receiving sequence number to be incremented by 1, and the upper boundary of the receiving window is maintained unchanged;

After the processing of the signaling is completed, the upper boundary of the receiving window is expanded by one.

Optionally, the method further includes: the base station receiving signaling based on a sliding window control mechanism.

An embodiment of the present invention further provides a signaling receiving apparatus of a base station, where the apparatus includes:

a setting unit, configured to set a receiving window size of the reliable communication process of the base station according to a signaling traffic volume between the base station and the controller;

The control unit is configured to control, when the base station receives signaling, the expansion of the receiving window according to the capability of the CPU of the base station to process signaling.

The embodiment of the present invention further provides a computer readable storage medium, where the computer readable storage medium stores computer executable instructions, and when the computer executable instructions are executed, implements a signaling receiving method of the base station.

The beneficial effects of the embodiments of the present invention are as follows:

In the embodiment of the present invention, the signaling receiving capability of the base station is associated with the capability of the CPU to process the signaling, and the capability of the CPU to process the signaling suppresses the signaling receiving capability, thereby suppressing the transmission capability of the source, and smoothly controlling the CPU load of the base station. Moreover, as the CPU load increases, the traffic that the source sends signaling gradually decreases, and the method of discarding signaling is not required, and the system is more stable and less lossless. Other aspects will be apparent upon reading and understanding the drawings and detailed description.

DRAWINGS

1 is a flowchart of a signaling receiving method of a base station according to Embodiment 1 of the present invention;

2 is another flowchart of a signaling receiving method of a base station according to Embodiment 1 of the present invention;

Figure 3 is a block diagram of a WCDMA system of the third embodiment;

4 is a block diagram of a protocol inside a WCDMA base station system according to Embodiment 3;

FIG. 5 is a schematic diagram of a sliding window control mechanism according to Embodiment 3 of the present invention.

detailed description

In order to solve the problem that the related technology cannot achieve the smooth control of the CPU and the suppression of the signaling source when receiving the signaling, the embodiment of the present invention provides a signaling receiving method and apparatus for the base station, which are described below with reference to the accompanying drawings and embodiments. This application is further described in detail. It is understood that the specific embodiments described herein are merely illustrative of the application and are not intended to be limiting.

Embodiment 1

A signaling receiving method of a base station according to an embodiment of the present invention firstly sets a receiving window size of a reliable communication process of the base station according to a signaling traffic size between the base station and the controller. The base station, when receiving the signaling, controls the expansion of the receiving window according to the capability of the CPU of the base station to process signaling; specifically, after the base station processes the signaling sent by the controller, the base station expands The receiving window associates the expansion of the receiving window of the reliable communication process with the processing of the base station protocol process.

As shown in FIG. 1, the signaling receiving method of the base station in this embodiment includes:

Step S11, setting a receiving window size of the reliable communication process of the base station according to the size of the signaling traffic between the base station and the controller;

Step S12: When receiving the signaling, the base station controls the expansion of the receiving window according to the capability of the central processing unit CPU of the base station to process signaling.

Optionally, step S11 may include: initializing the receiving window size according to a service size between the base station and the controller, and establishing a reliable communication link by using an interaction.

Optionally, the method further includes: after establishing a reliable communication link, the controller acquires an initial receiving sequence number and a receiving window size of the base station, where the number of packets that the controller can continuously send at one time cannot exceed The receiving window size.

Optionally, step S12 may include: after the base station processes the signaling sent by the controller, expanding the receiving window. In this embodiment, the signaling sent by the controller may be received; when the sequence number carried by the received signaling is the same as the expected sequence number of the base station, the signaling is processed, and the base station expects to receive the sequence number plus one. And maintaining the upper boundary of the receiving window unchanged; after completing the processing of the signaling, the upper boundary of the receiving window is expanded by one.

Optionally, in this embodiment, the base station receives signaling based on a sliding window control mechanism.

As shown in FIG. 2, another flowchart of the signaling receiving method of the base station in this embodiment may include:

Step S101: Initialize a receiving window size according to a service size between the base station and the controller, and establish a reliable communication link by using an interaction;

In this embodiment, after establishing a reliable communication link, the controller acquires the beginning of the base station. The receiving sequence number and the receiving window size are started, and the number of packets that the controller can continuously transmit at one time cannot exceed the receiving window size.

Step S102: Receive signaling sent by the controller.

In this embodiment, the base station receives signaling based on a sliding window control mechanism.

Step S103: When the sequence number carried by the received signaling is the same as the expected sequence number of the base station, the signaling is processed, and the base station expects the receiving sequence number to be incremented by 1, and the upper boundary of the receiving window is maintained unchanged.

Step S104, after completing the processing of the signaling, expanding the upper boundary of the receiving window by one.

In this embodiment, the internal communication and the source linkage are jointly controlled by the receiving window of the reliable communication process and the protocol processing process, and the simple modification of the related system can be completed. In this embodiment, the processing of receiving and receiving messages and receiving window size is processed according to a reliable communication protocol. However, unlike the usual reliable communication protocol, the packets sent by the opposite end are received in order and submitted to the protocol process for processing. Usually, the reliable communication protocol immediately expands the receiving window, but remains unchanged. After the protocol process processes the signaling sent by the peer, the receiving window size is expanded.

Embodiment 2

A signaling receiving apparatus of a base station according to an embodiment of the present invention includes a setting unit and a control unit;

The setting unit is configured to set a receiving window size unit of the reliable communication process of the base station according to a signaling traffic size between the base station and the controller;

The control unit is configured to control, when the base station receives signaling, an extended unit of the receiving window according to the capability of the CPU of the base station to process signaling.

Embodiment 3

The technical solution of the embodiment of the present invention is further described by taking a WCDMA (Wideband Code Division Multiple Access) system as an example:

The block diagram of the WCDMA system of this embodiment is shown in FIG. 3. The WCDMA system consists of a base station (NODE B), an RNC (Radio Network Controller), a CN (Core Net, a core network), and a UE (User Equipmen, mobile Taiwan) consists of four parts:

1. Core network CN: The function of controlling and exchanging mobile stations located in its jurisdiction entity. The core network is a unified name, and generally includes multiple functional entities, such as MSC (Mobile Switching Center), SGSN (Serving GPRS (General Packet Radio Service) Support Node, Serving GPRS Support Node). ), HLR (Home Location Register), etc.

2. Radio network controller RNC: A functional entity that is associated with RNC (Radio Network Subsystem) and has control and management of radio resources for one or more NODE Bs. It can be OMC (Operation and Maintenance Center, Operation and Maintenance Center) to control.

3. Base station NODE B: A wireless transceiver device serving one cell or multiple cells.

4. Mobile station UE: includes a mobile device and a UMTS (Universal Mobile Telecommunications System) subscriber identity module, generally referred to as a mobile phone.

In FIG. 3, the Iu interface is a standard interface between the RNC and the CN, and the Iur interface is a standard interface between the RNC, and the Uu interface is an interface between the UE and the RNS.

The protocol block diagram of the WCDMA base station system in this embodiment is shown in FIG. 4, and on the wireless network control plane, the following layers are respectively composed:

1. NBAP (NodeB Application Part) protocol: completes the signaling processing of the standard protocol Iub interface, and is a standard protocol established by ITU, such as establishing a wireless link, suggesting a logical cell.

2. Reliable communication protocol: The ASTP (Asynchronous Transfer Mode) medium is the SSOP (Service Specific Connection Oriented Protocol) protocol, and the IP medium is the SCTP (Stream Control Transmission Protocol). The agreement is also a standard protocol developed by ITU. The purpose is to allow the two parties to communicate not to repeat, not to lose, and to deliver the signalling to the other party in order;

3. Link layer: PVC is a permanent virtual circuit (IP), and the IP medium is an IP layer.

4. Physical layer: such as E1/T1 or FE.

The purpose of the reliable communication protocol is mainly to solve the loss of the transmission network between the controller and the base station. The problem of out-of-order packets, etc., so that the transmitted signaling can be not lost, and the other party is submitted in order without repetition. The implementation of its internal reliable communication is based on the sliding window control mechanism, as shown in Figure 5:

The two sides of the communication initialize the window size according to their own capabilities, and establish a reliable communication link through interaction. The result of the interaction is that the sender obtains the initial receiving sequence number of the receiver and the receiving window size. In FIG. 5, the initial receiving sequence number of the receiving party is 0, the maximum receiving sequence number is w, and the receiving window size is w.

When the sender sends: the first packet carries the initial number 0 of the receiver, the second packet carries the sequence number 1, and so on. The number of packets that the sender can continuously send at one time cannot exceed the receiving window size w of the receiver, that is, the receiving window size of the receiver limits the sending capability of the sender.

When receiving by the receiver, the sequence number of the received packet is compared with the current expected reception sequence number. If they are equal, the current expected reception sequence number is incremented by 1, and the upper boundary of the reception window is also incremented by 1, and the received message is submitted to the NBAP protocol for processing. Module processing.

Through the sliding window control mechanism, the signaling can be guaranteed to be non-repetitive, not lost, and submitted to the other party in order.

In the related CPU control method, the reliable communication protocol and the NBAP protocol are respectively controlled. For example, when the CPU reaches the threshold of 90%, the NBAP protocol selectively discards the received signaling, thus controlling the further increase of the CPU load. Although this method reduces the load, it is simple and rude.

In the embodiment of the invention, the source sliding window size and the CPU load linkage manner are adopted, and the source is ingeniously suppressed. In the WCDMA base station system, the specific implementation process is as follows:

Taking the underlying medium as ATM and the reliable communication processing protocol as SSCOP as an example:

(1) According to the service scale between the WCDMA base station and the controller, the SSCOP process of the WCDMA base station sets an appropriate receiving window size; for example, if the receiving window size is set to 100, it indicates that at most 100 NBAPs sent by the controller are simultaneously received. Signaling.

(2) The expansion of the SSCOP receiving window on the base station side is related to the processing of the NBAP protocol process. The specific method is as follows:

The processing of receiving and receiving messages and the size of the receiving window is processed according to the definition of the SSCOP protocol, but the expansion of the receiving window is different from that in the SSCOP protocol, and is performed after the NBAP protocol is processed, and the specific processing is performed. Examples are as follows:

Assume that the SSCOP receiving window of the current base station expects the receiving sequence number to be 1, and the upper boundary of the window is 100. At this time, the NBAP signaling with sequence number 1 sent by the controller is received:

Because the sequence number carried by the received signaling is the same as the expected sequence number of the base station, it is submitted to the NBAP signaling process, and the base station expects the received sequence number to be changed to 2, but unlike the standard SSCOP protocol, the receiving window is not expanded at this time. At the boundary, the upper boundary of the receiving window is maintained at 100, assuming that the base station SSCOP receiving window size is 99 at this time.

After the signaling processing is completed, the upper boundary of the receiving window of the SSCOP is expanded to 1, which is 101. At this time, the receiving window size of the SSCOP is restored to 100.

Since the receiving window size is expanded after the NBAP protocol process is processed, the receiving capability is correlated with the CPU processing capability, and the receiving window size suppresses the sending capability of the controller, thereby suppressing the signaling rate of the source.

When the CPU load of the base station is gradually increased, the speed at which the base station expands the receiving window is slowed down, and the signaling transmission rate of the controller is gradually decreased, thereby achieving a proper balance, and the linkage between the internal and the source is realized steplessly and non-destructively. . When the controller finds that the signaling rate is degraded, the controller can further perform root source control, such as reducing the coverage of the cell.

Since the basis of the reliable communication protocol is sliding window control, SSCOP and SCTP or TCP (Transmission Control Protocol), the internal sliding window control mechanism is the same. This method can be applied in various scenarios, and since only the change is made. The timing of the expansion of the receiving window is also small in implementation, and has been well applied in practical wireless communication systems.

The embodiment of the present invention further provides a computer readable storage medium, where the computer readable storage medium stores computer executable instructions, and when the computer executable instructions are executed, implements a signaling receiving method of the base station.

In the embodiment of the present invention, the signaling receiving capability of the base station is associated with the capability of the CPU to process the signaling, and the capability of the CPU to process the signaling suppresses the signaling receiving capability, thereby suppressing the transmission capability of the source, and smoothly controlling the CPU load of the base station. Moreover, as the CPU load increases, the traffic that the source sends signaling gradually decreases, and the method of discarding signaling is not required, and the system is more stable and less lossless.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function. This application is not limited to any specific combination of hardware and software. A person skilled in the art should understand that the technical solutions of the present application can be modified or equivalent, without departing from the spirit and scope of the technical solutions of the present application, and should be included in the scope of the claims of the present application.

Industrial applicability

The above technical solution can smoothly control the CPU load of the base station; for the system, it is smoother and more lossless.

Claims (7)

A signaling receiving method for a base station, the method comprising: Setting a receiving window size of the reliable communication process of the base station according to a size of signaling traffic between the base station and the controller; When the base station receives signaling, the expansion of the receiving window is controlled according to the capability of the central processing unit CPU of the base station to process signaling. The signaling receiving method of the base station according to claim 1, wherein: the setting a receiving window size of the reliable communication process of the base station according to the size of the signaling traffic between the base station and the controller comprises: according to the base station and The size of the service between the controllers, the size of the receiving window is initialized, and a reliable communication link is established through interaction. The method for receiving a signaling of a base station according to claim 2, the method further comprising: after establishing a reliable communication link, the controller acquiring an initial receiving sequence number and a receiving window size of the base station, wherein the controlling The number of packets that can be continuously sent at one time cannot exceed the size of the receiving window. The signaling receiving method of a base station according to claim 3, wherein: when the base station receives signaling, controlling the expansion of the receiving window according to the capability of the central processing unit CPU of the base station to process signaling includes: After the base station processes the signaling sent by the controller, the base station is enlarged in size. The signaling receiving method of the base station according to claim 4, wherein: after the base station processes the signaling sent by the controller, expanding the receiving window comprises: Receiving signaling sent by the controller; When the sequence number carried by the received signaling is the same as the sequence number expected by the base station, the signaling is processed, and the base station expects the receiving sequence number to be incremented by 1, and the upper boundary of the receiving window is maintained unchanged; After the processing of the signaling is completed, the upper boundary of the receiving window is expanded by one. The method for receiving a signaling of a base station according to any one of claims 1 to 5, further comprising: the base station receiving signaling based on a sliding window control mechanism. A signaling receiving apparatus for a base station, the apparatus comprising: Setting a unit, configured to set the base according to a size of signaling traffic between the base station and the controller The receiving window size of the reliable communication process of the station; The control unit is configured to control, when the base station receives signaling, the expansion of the receiving window according to the capability of the CPU of the base station to process signaling.

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