CN1327724C - Method for transmitting SABP news by ICP - Google Patents

Abstract

The present invention relates to a method for sending SABP messages by a TCP, which comprises the steps: A) whether a TCP SORCKET connection exists between a sending end and a receiving end is detected; if true, an SABP message is sent in a public message driving task; if false, the following steps are continued; B) the SABP message is cached in a cache queue; C) a request for establishing a TCP SOCKET connection is sent to the receiving end; D) whether a TCP SOCKET connection is successful is detected; E) if false, the step C is turned to; if true, step F is executed; F) the SABP message is read by the other task from a cache queue and is sent. The SABP message can be reliably sent with high efficiency by the method of the present invention.

Description

A Method of Sending SABP Message Using TCP

technical field

The present invention relates to a wireless network, in particular to a SABP (Service Area Broadcast Protocol, Service Area Broadcast Protocol) message sending method.

Background technique

Prior art one:

Take the SABP message sent by RNC (Radio Network Controller, radio network controller) as an example. Referring to Fig. 1, in the cell broadcast service, the transmission of the SABP message between RNC and CN (Core Network, core network) is established on TCP (Transmission Control Protocol, transmission control protocol). The RNC triggers the TCP sending of the SABP message in a common message-driven task, as shown in FIG. 2 .

The shortcoming of prior art one is as follows:

1. If the TCP socket (that is, TCP SOCKET) adopts blocking mode, if the TCP SOCKET connection does not exist, you need to create a new TCP SOCKET connection in the public message-driven task, if the link between the sending and receiving ends is abnormal or If the end is not ready, it may cause the task to block at the connection Connect () event or send Send () event.

2. If the TCP SOCKET adopts non-blocking mode, if the TCP SOCKET connection does not exist, the new connection cannot guarantee immediate success, which will lead to the loss of messages.

Prior art two:

Buffer SABP messages in public message-driven tasks, and then start dedicated tasks to send SABP messages, as shown in Figure 3.

There is no connection between the public message-driven task and the TCP SOCKET event. It is only responsible for putting the message to be sent into the cache queue. The dedicated SEND task takes the message from the cache queue and submits it to the TCPSOCKET event for sending.

The shortcoming of prior art two is as follows:

1. The RNC needs a large memory overhead for caching each SABP message. Because cached messages can be encoded codestreams, and the message size depends on parameters in the message, it is not possible to estimate the memory required to cache each message. Assuming that the encoded size of each message is about 10k bytes, if 100 messages are buffered at the same time, the RNC needs 1M memory overhead.

2. Each message is cached, which increases the message processing process and increases the delay.

Contents of the invention

The present invention provides an efficient and reliable method for sending SABP messages.

A kind of method that TCP sends service area broadcast protocol SABP message provided by the invention comprises the following steps:

A) detect whether the TCP socket connection between the sending end and the receiving end exists, if so, then send the service area broadcast protocol SABP message in the public message-driven task; if not, continue the following steps;

B) cache the service area broadcast protocol SABP message in the cache queue;

C) initiate a TCP socket connection establishment request to the receiving end;

D) detect whether the TCP socket connection is successful;

E) if not, then go to step C, if so, then perform step F;

F) Another task reads the service area broadcast protocol SABP message from the cache queue and sends it.

According to the above method of the present invention, the step D is realized by using the Select() function provided by the socket.

According to the above method of the present invention, the sending end is a radio network controller, and the receiving end is a core network.

According to the above method of the present invention, the sending end is a core network, and the receiving end is a radio network controller.

According to the above method of the present invention, the TCP socket adopts non-blocking mode

Description of drawings

Fig. 1 is a schematic diagram of SABP message transmission between RNC and CN in the prior art.

Fig. 2 is one of the TCP sending methods of SABP message in the prior art.

Fig. 3 is the second TCP sending method of SABP message in the prior art.

Fig. 4 is a schematic diagram of the TCP sending method of the SABP message of the present invention.

Fig. 5 is a flowchart of the method of the present invention.

Detailed ways

Take the SABP message sent by the RNC to the CN as an example. TCP SOCKET adopts non-blocking mode.

Please refer to Figure 4 and Figure 5, first check whether the TCP SOCKET connection between RNC and CN exists, if the TCP SOCKET connection exists, RNC sends the SABP message in the public message-driven task; if the TCP SOCKET connection does not exist, RNC caches the SABP message In the cache queue and initiate a TCP SOCKET connection establishment request to CN in the public message-driven task, another SEND task detects whether the TCP connection is successful, and if the TCP connection is successful, read the message from the cache queue and send it. If it detects that the TCP connection is unsuccessful, it will continue to initiate a TCP SOCKET connection establishment request to the CN. Among them, detecting whether the TCP connection is successful can be realized by calling the Select() function provided by SOCKET.

According to the above method of the present invention, there is a direct connection between the public message-driven task and the TCP SOCKET event, and if the TCP connection exists, the message can be directly sent without going through this link of buffering.

The method of the present invention is also applicable to the sending mechanism of the SABP message on the CN side.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (5)

1, a kind of method that TCP sends service area broadcast protocol SABP message, comprises the following steps: A) detect whether the TCP socket connection between the sending end and the receiving end exists, if so, then send the service area broadcast protocol SABP message in the public message-driven task; if not, continue the following steps; B) cache the service area broadcast protocol SABP message in the cache queue; C) initiate a TCP socket connection establishment request to the receiving end; D) detect whether the TCP socket connection is successful; E) if not, then go to step C, if so, then perform step F; F) Another task reads the service area broadcast protocol SABP message from the cache queue and sends it. 2. A method for sending a service area broadcast protocol SABP message by TCP according to claim 1, characterized in that: said step D is implemented by using the Select() function provided by the socket. 3. A method for TCP sending SABP message according to claim 1 or 2, characterized in that: the sending end is a radio network controller, and the receiving end is a core network. 4. A method for TCP sending SABP message according to claim 1 or 2, characterized in that: the sending end is a core network, and the receiving end is a radio network controller. 5. A method for TCP sending SABP message according to claim 1, characterized in that: said TCP socket adopts a non-blocking method.

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