CN106470448B - Method and device for receiving signaling of base station - Google Patents
Method and device for receiving signaling of base station Download PDFInfo
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- CN106470448B CN106470448B CN201510500688.4A CN201510500688A CN106470448B CN 106470448 B CN106470448 B CN 106470448B CN 201510500688 A CN201510500688 A CN 201510500688A CN 106470448 B CN106470448 B CN 106470448B
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- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
Abstract
The invention discloses a signaling receiving method of a base station, which comprises the following steps: A. setting the size of a receiving window of a reliable communication process of a base station according to the signaling flow between the base station and a controller; B. and when the base station receives the signaling, controlling the expansion of the receiving window according to the signaling processing capacity of the CPU of the base station. The invention also discloses a signaling receiving device of the base station. The invention relates the signaling receiving capacity of the base station and the capacity of the CPU for processing the signaling, and the capacity of the CPU for processing the signaling inhibits the signaling receiving capacity, thereby inhibiting the sending capacity of the source and smoothly controlling the CPU load of the base station; and with the increase of CPU load, the flow of signaling sent by the source is gradually reduced, and a mode of discarding the signaling is not needed, so that the system is more stable and lossless.
Description
Technical Field
The present invention relates to the field of communication network or computer network technology, and in particular, to a signaling receiving method and apparatus for a base station.
Background
With the development of communication technology, the wireless mobile communication system has a wider and wider application range, and the mobile phone has a higher and higher ownership. The wireless mobile communication system is composed of a controller and a base station system. One controller manages a plurality of base station systems and is connected with a core network to complete the management of the logical resources of the base station systems. 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 is accessed to 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, an embedded real-time operating system runs, a CPU needs to complete international standard protocol processing between the CPU and a controller and related internal resource management and other work, an interface between the base station system and the controller generally adopts international standard set by international power connection, bears on a reliable communication protocol, is in a finite automatic state machine in form, and describes what information is received in what state and what processing should be done.
With the increase of the number of users and telephone traffic, and scenes such as holidays, peak hours of work and commute, competitions and the like, the impact on the CPU of the base station system is increased, and the reasonable control of the CPU of the base station system becomes an important problem. In the traditional CPU control method, each process is independently controlled, when a CPU approaches a threshold, only the top-layer protocol process is generally processed, and the mode is to actively discard signaling, so that the CPU load is reduced.
However, the inventors have discovered in implementing the present invention that the conventional CPU control method has some disadvantages. Because each process is independent, the effect of integral linkage can not be achieved, for example, the protocol processing process discards the signaling, but the protocol process of reliable communication still receives the signaling to be processed continuously; secondly, because the control method is only discarded passively, although the CPU is not overloaded, the feelings of some users are affected and are random, and the important signaling of some important users is also discarded, which cannot achieve the smooth control of the CPU and even cannot suppress the source.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method and a device for receiving signaling of a base station, so as to solve the problems that the prior art cannot achieve smooth control of a CPU and cannot suppress a signaling source when receiving signaling.
In order to solve the above technical problem, the present invention provides a signaling receiving method of a base station, including the following steps:
A. setting the size of a receiving window of a reliable communication process of a base station according to the signaling flow between the base station and a controller;
B. and when the base station receives the signaling, controlling the expansion of the receiving window according to the signaling processing capacity of the CPU of the base station.
Further, the step a specifically includes: initializing the size of the receiving window according to the service scale between the base station and the controller, and establishing a reliable communication link through interaction.
Further, after the reliable communication link is established, the controller obtains an initial receiving sequence number and a receiving window size of the base station, and the number of packets that can be continuously sent by the controller at one time cannot exceed the receiving window size.
Further, the step B specifically includes: and after the base station processes the signaling sent by the controller, expanding the receiving window.
Further, the step B specifically includes:
receiving signaling sent by the controller;
when the sequence number carried by the received signaling is the same as the expected receiving sequence number of the base station, processing the signaling, adding 1 to the expected receiving sequence number of the base station, and keeping the upper boundary of the receiving window unchanged;
and after finishing the signaling processing, expanding the upper boundary of the receiving window by 1.
Further, the base station receives signaling based on a sliding window control mechanism.
The invention also provides a signaling receiving device of the base station, which comprises:
a unit for setting the size of a receiving window of a reliable communication process of a base station according to the size of signaling flow between the base station and a controller;
and the base station controls the unit for expanding the receiving window according to the capability of the CPU of the base station for processing the signaling when receiving the signaling.
The invention has the following beneficial effects:
the invention relates the signaling receiving capacity of the base station and the capacity of the CPU for processing the signaling, and the capacity of the CPU for processing the signaling inhibits the signaling receiving capacity, thereby inhibiting the sending capacity of the source and smoothly controlling the CPU load of the base station; and with the increase of CPU load, the flow of signaling sent by the source is gradually reduced, and a mode of discarding the signaling is not needed, so that the system is more stable and lossless.
Drawings
Fig. 1 is a flowchart of a signaling receiving method of a base station according to an embodiment of the present invention;
FIG. 2 is a block diagram of a WCDMA system of the present embodiment;
fig. 3 is a protocol block diagram inside a WCDMA base station system of the present embodiment;
FIG. 4 is a diagram illustrating a sliding window control mechanism according to an embodiment of the present invention.
Detailed Description
In order to solve the problem that the prior art cannot achieve smooth control of a CPU and cannot suppress a signaling source when receiving signaling, the present invention provides a signaling receiving method and apparatus for a base station, which are described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Example 1
As shown in fig. 1, a signaling receiving method of a base station according to an embodiment of the present invention first sets a size of a receiving window of a reliable communication process of the base station according to a signaling traffic between the base station and a controller. Then, when the base station receives the signaling, the base station controls the expansion of the receiving window according to the capability of the CPU of the base station for processing the signaling; specifically, after the base station processes the signaling sent by the controller, the receive window is expanded, that is, the expansion of the receive window in the reliable communication process is associated with the processing of the protocol process of the base station. The embodiment specifically comprises the following steps:
and step s101, initializing the size of a receiving window according to the service scale between the base station and the controller, and establishing a reliable communication link through interaction. In this embodiment, after the reliable communication link is established, the controller obtains an initial receiving sequence number and a receiving window size of the base station, and the number of packets that can be continuously sent by the controller at one time cannot exceed the receiving window size.
And step s102, receiving the signaling sent by the controller. In this embodiment, the base station receives a signaling based on a sliding window control mechanism.
And step s103, when the sequence number carried by the received signaling is the same as the expected receiving sequence number of the base station, processing the signaling, adding 1 to the expected receiving sequence number of the base station, and maintaining the upper boundary of the receiving window unchanged.
And step s104, after finishing the signaling processing, expanding the upper boundary of the receiving window by 1.
In the embodiment, the internal linkage and the source linkage are jointly controlled in a mode of processing linkage through the receiving window of the reliable communication process and the protocol processing process, and the realization can be completed by simply modifying the existing system. In this embodiment, the process of receiving and sending a message and the size of a receiving window are processed according to a reliable communication protocol, but different from a normal reliable communication protocol, when a message sent by an opposite end is received in sequence and submitted to a protocol process for processing, the receiving window is not immediately enlarged like the normal reliable communication protocol, but remains unchanged, and after the protocol process finishes processing a signaling sent by the opposite end, the size of the receiving window is enlarged.
Example 2
The signaling receiving device of the base station comprises two units, wherein one unit is a unit for setting the size of a receiving window of a reliable communication process of the base station according to the signaling flow between the base station and a controller; and the other is a unit for controlling the expansion of the receiving window according to the signaling processing capacity of the CPU of the base station when the base station receives the signaling.
Example 3
In this embodiment, a WCDMA (Wideband Code Division Multiple Access) system is taken as an example to further describe the technical scheme of the present invention in detail:
a block diagram of a WCDMA system of this embodiment is shown in fig. 2, where the WCDMA system is composed of four parts, namely, a base station (NODE B), an RNC (Radio Network Controller ), a CN (Core Network), and a UE (user equipment, mobile station):
1. a core network CN: and a functional entity for controlling and exchanging mobile stations in the jurisdiction area. The core network is a unified name, and generally includes a plurality of functional entities, such as an MSC (Mobile Switching Center), an SGSN (Serving GPRS (General Packet Radio Service) Support Node, a Serving GPRS Support Node, an HLR (Home Location Register), and the like.
2. A radio network controller RNC: the system belongs to an RNS (Radio Network Subsystem), has a functional entity for controlling and managing Radio resources of one or more NODE bs, and can be controlled by an OMC (Operation and Maintenance Center).
3. Base station NODE B: a radio transceiver device serving a cell or a plurality of cells.
4. A mobile station (UE): including Mobile devices and UMTS (Universal Mobile telecommunications system) subscriber identity modules, commonly referred to as handsets.
A protocol block diagram in a WCDMA base station system of this embodiment is shown in fig. 3, and a control plane of a wireless network is respectively composed of the following layers:
NBAP (NodeB Application Part) protocol: finishing the signaling processing of the standard protocol Iub interface, and establishing a standard protocol for the international telecommunications union, such as establishing a wireless link, proposing a logical cell, etc.
2. Reliable communication protocol: an SSCOP (Service Specific Connection Oriented Protocol) Protocol is arranged on an ATM (Asynchronous Transfer Mode) medium, an SCTP (Stream Control Transmission Protocol) Protocol is arranged on an IP medium, and the standard Protocol is also established by international power Connection, so that the aim that two communication parties can deliver signaling to each other in sequence without repeating and losing;
3. and a link layer: PVC (Permanent Virtual Circuit) is arranged under ATM (automatic teller machine), and an IP layer is arranged under IP (internet protocol);
4. physical layer: such as E1/T1 or FE, etc.
The reliable communication protocol has the purpose of mainly solving the problems of packet loss, disorder and the like of a transmission network between a controller and a base station, so that transmitted signaling can be submitted to an opposite side in a non-repeated sequence without losing. The implementation of reliable communication inside the system is based on a sliding window control mechanism, as shown in fig. 4:
the two communicating parties initialize the window size according to their own capabilities, establish a reliable communication link through interaction, and as a result of the interaction, the sender obtains the initial receiving sequence number of the receiver and the size of the receiving window, and in fig. 4, the initial receiving sequence number of the receiver is 0, and the maximum receiving sequence number is w.
When the sender sends: the first packet carries the initial sequence 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 size w of the receiving window of the receiver, i.e. the size of the receiving window limits the sending capacity of the sender.
When the receiving party receives: comparing the sequence number of the received packet with the current expected receiving sequence number, if the sequence number is equal to the current expected receiving sequence number, adding 1 to the current expected receiving sequence number, simultaneously adding 1 to the upper boundary of the receiving window, and submitting the received message to the NBAP protocol processing module for processing.
Through a sliding window control mechanism, the signaling can be submitted to the opposite side in sequence without repetition and loss.
In the existing CPU control method, the reliable communication protocol and the NBAP protocol are controlled separately, for example, when the CPU reaches 90% of the threshold, the NBAP protocol selectively discards the received signaling, which controls the further increase of the CPU load, but this way reduces the load, but is simple and rough. The embodiment of the invention adopts the mode of linking the size of the sliding window of the receiving party and the CPU load, skillfully inhibits the source, and has the following specific implementation process in a WCDMA base station system:
the following description will be given by taking the bottom 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 the appropriate receiving window size to be 100, which indicates that at most 100 NBAP signaling sent by the controller is received simultaneously.
(2) The expansion of the SSCOP receiving window at the base station side is related to the processing of the NBAP protocol process, and the specific mode is as follows:
the processing of receiving and sending messages and the size of a receiving window is processed according to the definition of an SSCOP protocol, but the expansion of the receiving window is different from that in the SSCOP protocol and is carried out after the processing of an NBAP protocol, and the specific processing example is as follows:
assuming that the expected receiving sequence number of the SSCOP receiving window of the current base station is 1 and the upper boundary of the window is 100, at this time, receiving the NBAP signaling with the sequence number of 1 sent by the controller:
because the sequence number carried by the received signaling is the same as the expected receiving sequence number of the base station, the sequence number is handed over to NBAP signaling processing, the sequence number expected to be received by the base station is increased by 1 to become 2, but unlike in the standard SSCOP protocol, the upper window boundary is not expanded, the upper window boundary is maintained at 100, and the SSCOP receiving window size of the base station is 99.
And the NBAP protocol process normally processes the signaling, after the signaling processing is finished, the upper boundary of the SSCOP receiving window is expanded to 1 to 101, and at the moment, the size of the SSCOP receiving window is recovered to 100.
Because the size of the receiving window needs to be enlarged after the NBAP protocol process is processed, the receiving capability and the CPU processing capability are associated, and the size of the receiving window inhibits the sending capability of the controller, thereby inhibiting the signaling rate of a source.
When the CPU load of the base station is gradually increased, the speed of the base station for expanding the receiving window is slowed down, and the signaling sending rate of the limiting controller is gradually reduced, so that a proper balance is achieved, and linkage between the interior and the source is realized steplessly and nondestructively. When the controller finds that the signaling rate is reduced, the controller can further perform root control, such as means for reducing the coverage of a cell.
The reliable communication Protocol is based on sliding window control, and SSCOP and SCTP or TCP (Transmission control Protocol) have the same internal sliding window control mechanism, so the method can be applied in various scenes, and the realization cost is low because only the time for expanding the receiving window is changed, thereby the method is well applied to the actual wireless communication system.
The invention relates the signaling receiving capacity of the base station and the capacity of the CPU for processing the signaling, and the capacity of the CPU for processing the signaling inhibits the signaling receiving capacity, thereby inhibiting the sending capacity of the source and smoothly controlling the CPU load of the base station; and with the increase of CPU load, the flow of signaling sent by the source is gradually reduced, and a mode of discarding the signaling is not needed, so that the system is more stable and lossless.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.
Claims (3)
1. A method for receiving signaling of a base station, the method comprising:
A. setting the size of a receiving window of a reliable communication process of a base station according to the signaling flow between the base station and a controller; the method specifically comprises the following steps: initializing the size of the receiving window according to the service scale between the base station and the controller, establishing a reliable communication link through interaction, acquiring an initial receiving sequence number and the size of the receiving window of the base station by the controller, wherein the number of packets which can be continuously sent by the controller at one time cannot exceed the size of the receiving window;
B. when the base station receives the signaling, the expansion of the upper boundary of the receiving window is controlled according to the signaling processing capacity of a CPU of the base station; the method specifically comprises the following steps: when the sequence number carried by the received signaling is the same as the expected receiving sequence number of the base station, processing the signaling, adding 1 to the expected receiving sequence number of the base station, and keeping the upper boundary of the receiving window unchanged; and after the base station finishes the processing of the signaling, expanding the upper boundary of the receiving window by 1.
2. The signaling receiving method of a base station according to claim 1, wherein the base station receives signaling based on a sliding window control mechanism.
3. An apparatus for receiving signaling of a base station, the apparatus comprising:
a first unit, configured to set a size of a receive window of a reliable communication process of a base station according to a size of a signaling traffic between the base station and a controller; the method specifically comprises the following steps: initializing the size of the receiving window according to the service scale between the base station and the controller, establishing a reliable communication link through interaction, acquiring an initial receiving sequence number and the size of the receiving window of the base station by the controller, wherein the number of packets which can be continuously sent by the controller at one time cannot exceed the size of the receiving window;
a second unit, configured to control, when the base station is receiving a signaling, expansion of an upper boundary of the receive window according to a capability of a CPU of the base station to process the signaling; the method specifically comprises the following steps: when the sequence number carried by the received signaling is the same as the expected receiving sequence number of the base station, processing the signaling, adding 1 to the expected receiving sequence number of the base station, and keeping the upper boundary of the receiving window unchanged; and after the base station finishes the processing of the signaling, expanding the upper boundary of the receiving window by 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510500688.4A CN106470448B (en) | 2015-08-14 | 2015-08-14 | Method and device for receiving signaling of base station |
| PCT/CN2016/094390 WO2017028727A1 (en) | 2015-08-14 | 2016-08-10 | Signalling receiving method and device for base station |
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| CN201510500688.4A CN106470448B (en) | 2015-08-14 | 2015-08-14 | Method and device for receiving signaling of base station |
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2015
- 2015-08-14 CN CN201510500688.4A patent/CN106470448B/en active Active
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- 2016-08-10 WO PCT/CN2016/094390 patent/WO2017028727A1/en active Application Filing
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| US6438101B1 (en) * | 1997-12-23 | 2002-08-20 | At&T Corp. | Method and apparatus for managing congestion within an internetwork using window adaptation |
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| CN1992582A (en) * | 2005-12-31 | 2007-07-04 | 中兴通讯股份有限公司 | Implementation method for adaptive variable slide receiving window of broadband signaling link |
| CN101175027A (en) * | 2006-10-31 | 2008-05-07 | 中兴通讯股份有限公司 | SSCOP periodic line sliding window updating method |
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| CN106470448A (en) | 2017-03-01 |
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