CN101076019A - Method for transmitting long information based on USSD protocol - Google Patents

Abstract

The method comprises: a) disassembling the USSD message in original length into sub-packets adaptive to the transmission protocol; b) the disassembled USSD message is encoded; c) transmitting the coded USSD message; d) at receiving end, decoding the USSD message, and restoring it to the USSD message in original length.

Description

A kind of long letter breath transmission method based on the USSD agreement

Technical field

The present invention relates to the mobile communication technology field, particularly a kind of based on unstructured supplementary data traffic (Unstructured supplementary services data, USSD) long letter of agreement breath transmission method.

Background technology

USSD is a kind of based on global system for mobile communications (Global system for mobilecommunications, GSM) the novel interactive data service of network, it is the new business of releasing on the short message system technical foundation of GSM, have quick and convenient, towards connect, extensively be suitable for, advantages such as real-time is high, fail safe height, can remedy some technical deficiency of traditional short message, help operator to obtain new value-added service income with little input.USSD has following characteristics:

1) quick.In interactive application owing to only need to set up once to connect, reduced and repeatedly set up the time delay that signaling connects, back and forth the response time once shorter than SMS service, the shortest is 1/7th of short message;

2) convenient.The user need not to carry out menu selection step by step, but directly imports the USSD command-string;

3) support roaming.Each bar order of USSD all to pass through the Home Location Registry place (Home Location Register, HLR), so the user is when roaming, with the same manner operation based on the USSD business;

4) extensively be suitable for.USSD can move at present all GSM mobile handset;

5) function is strong.Can provide service with conversational mode and information service menu mode.

Simultaneously, with traditional short message service (Short Messaging Service, SMS) service is compared, USSD is in real time and outstanding on the interactivity.

Ratio, USSD is outstanding on real-time and interactivity.

At first, during non-voice was called out, it was that (Stand alone Dedicated Control Channel, SDCCH), the message transmission rate of USSD is approximately 600bps to Separate Dedicated Control Channel that USSD uses identical signalling path with SMS.During audio call, USSD switches to fast associated control channel, and (Fast Associated Control Channel, FACCH), message transmission rate is approximately 1000bps, can only reach 600bps and SMS is the highest.WAP (wireless application protocol) (WIRELESS APPLICATIONPROTOCAL with release in nearly 2 years, WAP) and GPRS (General Packet RadioService, GPRS) technology is compared, and USSD has solved the user can only use professional problem under non-voice is called out.

Secondly, USSD keeps wireless connections always in conversation procedure, transparent pipeline is provided, and does not store forwarding; And SMS does not have session channel at the physical carrier layer, has only a store-and-forward system, and the user finishes one query need carry out repeatedly conversation procedure.Therefore the information response of USSD leads high.

Moreover USSD can adjust service content at server end, helps operator to make a response at the variation of the market demand rapidly.Compare the communication mode of SMS point-to-point, this end of USSD has stronger interactivity undoubtedly to the contact between system.In case system makes modification, the user just can obtain up-to-date information, need not own special operation.

Just because of USSD has so numerous characteristics and strong points, operator can open many business based on USSD: for example information service, telephone bank, market survey etc.The USSD business is with its favor of numerous clients of obtaining of advantage easily and efficiently.But also there is following shortcoming:

1) the USSD agreement is to the strict restriction of the length of the information of up-downgoing, and up-downgoing USSD string is the longest can not to surpass 160 bytes.

2) existing mobile phone terminal is abundant inadequately to the support of USSD agreement, operation more complicated when the user uses based on USSD professional usually needs just can finish once-through operation by key several times through several steps, has influenced the enthusiasm that the user uses the USSD business.

Therefore, press for and provide a kind of long letter breath transmission method based on the USSD agreement to solve the problems referred to above.

Summary of the invention

The object of the present invention is to provide a kind of long letter breath transmission method to solve the problem that present USSD agreement can't be transmitted the long letter breath, break through of the restriction of USSD agreement the message length of up-downgoing based on the USSD agreement.

To achieve these goals, a kind of long letter breath transmission method of the present invention based on the USSD agreement, it comprises the steps: that (a) is split as original long USSD information the sub-information packet that is fit to host-host protocol; (b) the USSD information after splitting is encoded; (c) transmission is through the USSD information of coding; (d), USSD information is decoded, and combination is reduced to long USSD information at information receiving end.

Coded format in the above-mentioned steps (b) is:

DCS

The UDH district

Inclusion

Wherein:

(1) DCS field, by expansion DCS field, specifying next code is the USSD string that comprises the UDH data.

(2) the UDH district carries out user-defined application layer coding to identify sub-message number, message unique number, information such as current sub-message coding;

(3) " inclusion " is the information content of sub-USSD string.

In addition, realize long transmission of messages by in the USSD data field, carrying out the application layer coding.

Compared with prior art, remarkable advantage of the present invention is that it provides a kind of long letter breath transmission method based on the USSD agreement, has broken through the restriction of traditional USSD agreement to the up-downgoing message length.Simultaneously, based on numerous characteristics and strong point that existing USSD agreement is had, operator can open more USSD new business, for the user provides more perfect experience.

Description of drawings

Fig. 1 is a kind of long USSD information transmission mode schematic diagram based on the USSD agreement of the present invention.

Embodiment

After connecting, can transmit Chinese character string maximum length is 80 before travelling carriage and business side in the existing USSD agreement; English character string maximum length is 182.As shown in Figure 1, a kind of long letter breath transmission method based on the USSD agreement of the present invention is realized long USSD message transmission by the mode that will long USSD information be divided into a plurality of sub-information packet.

For reaching this purpose, a kind of long letter breath transmission method based on the USSD agreement of the present invention carries out the application layer coding to the UssdString field in the UssdContinue information, and the specific coding form is:

?DCS

The UDH district

Inclusion

Wherein, DCS field appointment next code is the USSD string that comprises the UDH data.The UDH district is the user definition coding region, is used to carry out the application layer coding to realize the transmission of long USSD message.Described UDH carries out in the district user-defined application layer coding to identify sub-message number, message unique number, information such as current sub-message coding; Described " inclusion " is the information content of sub-USSD string.

Above invention has been described in conjunction with most preferred embodiment, but the present invention is not limited to the embodiment of above announcement, and should contain various modification, equivalent combinations of carrying out according to essence of the present invention.

Claims (3)

1. the long letter breath transmission method based on the USSD agreement is characterized in that, comprises the steps:

(a) original long USSD information is split as the sub-information packet that is fit to host-host protocol;

(b) the USSD information after splitting is encoded;

(c) transmission is through the USSD information of coding;

(d), USSD information is decoded, and combination is reduced to long USSD information at information receiving end.

2. the long USSD information transferring method based on the USSD agreement according to claim 1, it is characterized in that: the coded format in the described step (b) is: ?DCS The UDH district Inclusion

Wherein:

(1) DCS field, by expansion DCS field, specifying next code is the USSD string that comprises the UDH data.

(2) the UDH district carries out user-defined application layer coding to identify sub-message number, message unique number, information such as current sub-message coding;

(3) " inclusion " is the information content of sub-USSD string.

3. the long USSD information transferring method based on the USSD agreement according to claim 2 is characterized in that: realize long transmission of messages by carry out the application layer coding in the USSD data field.

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