CN1705274A - Terminal capacity grading based WEB content adapting method - Google Patents

Abstract

This invention provides a WEB content adaptive method based on classified terminal ability in mobile communication system, which contains decomposing the WEB page content into text, picture, speech sound and video etc four elements through media analysis layer, in media process layer providing the performance function Vij=F(f, p, Iij) of each element corresponding to different coding version combined with user preference, using user terminal ability R as constraint and combined with the performance function of each element different coding version to select a optimal coding version to each element in WEB page adopting constraint, determining optimal combination plan and sending WEB page content to user terminal.

Description

WEB content adaptation method based on terminal capability classification

Technical field

The present invention relates to a kind of mobile terminal for different abilities the WEB solution of service is provided, relate in particular to a kind of combined method that common HTML WEB content of pages is carried out to adaptation, selection.

Background technology

Current telecommunication market, people are exchange messages " any place, any form any time, " to the pursuit of communication mode.And opening gradually along with WorldCom market, and the introducing of the new technology such as ATM, IP, Radio Access Network, competition between telecom operators, manufacturer just grows in intensity, and the personalized telecom business that how to strengthen user customizable becomes more and more important.In the face of the demand that huge market and user constantly propose day by day, traditional telecom operators have to meet new challenge: will manage more efficiently more and more huger, complicated telecommunications network on the one hand, and must constantly release the new business that meets user's needs on the other hand.

The appearance of mobile communication system has brought the convenience of exchange message whenever and wherever possible to people, the different network platforms, to the different terminal of a large amount of types, as mobile phone, portable terminal device or PDA provide service, has become the trend of mobile service development.It not only provides means of communication fast and easily for people, is also having a deep effect on people's life style simultaneously, has greatly promoted socioeconomic development.，Ge great telecom operators are attempting by providing more eurypalynous new business to improve its service level and competitiveness simultaneously.But because current all kinds of mobile terminals exist very large capacity variance, emerging mobile service provides identical business to still have very large difficulty for different terminals, and the development of mobile communication has not caught up with the growing communication service needs of people.How effectively to solve this contradiction, become the focus that mobile operator and service provider are concerned about.

Summary of the invention

The present invention is directed to problems of the prior art, a kind of WEB content adaptation method based on terminal capability classification has been proposed, by to different mobile terminals according to abilities such as the access of terminal, processing, demonstrations as constraints, text on the WEB page, picture, voice, video file are carried out to best-fit combination, the capability resource that utilizes to greatest extent terminal to have, for different mobile terminals provides identical WEB service service.

According to the present invention, provide a kind of in mobile communication system the WEB content adaptation method based on terminal capability classification, described mobile communication system comprises media decomposition layer, media processing layer and media delivery key-course, said method comprising the steps of:

(1) Business Stream of WEB content of pages is resolved into text, picture, voice, video four dvielements through media decomposition layer;

(2), at media processing layer, in conjunction with user preference, provide each element corresponding to the performance function V of different coding speed version _ij=F (f, p, I _ij), V wherein _ijshow that i element in the described WEB page usings the combination property weight of j code rate version during as last adaptive composite component, f is for different coding speed version I _ijthe distortion factor, p is the user preference factor;

(3) with ability of user terminal R _clientfor constraint, in conjunction with the performance function of each element different coding speed version, adopt following formula to select a best version of code to each element in the WEB page, and definite best-fit assembled scheme:

Function V=∑ V wherein _i, i=1,2 ... m is the performance function of the whole WEB page, under the restriction of terminal capability, makes function V reach maximum, in conjunction with terminal capability as constraints ∑ Size (I _i)≤R _client, constructive method equation group: $\left\{\begin{array}{c}V=\mathrm{\Σ}{V}_i\\ \mathrm{\ΣSize}\left(I_i\right)\≤R_{\mathrm{client}}\end{array}\right.,$ I=1 wherein, 2 ... m; Size (I wherein _i) represent that i element determine the file size after code rate version, Size (I _i)=t, { t ∈ Size (I _ij), Size (I _ij) represent that i element is according to the encode file size of this element of obtaining of j code rate version;

(4) in media delivery adaptation layer, with described best-fit assembled scheme, send WEB content of pages to user terminal.

Accompanying drawing explanation

Fig. 1 is that WEB page adaptation is selected flow chart.

Embodiment

1, terminal capability definition

1) there is each species diversity for the ability of processing medium type in mobile terminal at present, such as, HPC can not flow by displaying video, and some mobile phone and PDA do not support colour picture etc.When WEB service is provided, the media formats of not supporting is changed, media content is selected to suitable encoding scheme, for different mobile subscribers provides best business service content.

2) technical indicator of definition capacity of mobile terminal is bandwidth B.According to the difference of the access of mobile terminal, processing, display capabilities, amount to and be calculated as the maximum bandwidth that this terminal is supported WEB content of pages.

2, the classification of WEB content of pages

According to provided WEB service content, content of pages is mainly divided into following four dvielements: text, picture, voice, video.For each WEB page W, by above-mentioned different elements, form, and the arbitrary text, picture, voice, the video file that define in the WEB page are all elements.Setting each element is atomicity (minute property again), page W={I _i, i=1,2 ... m.

In order to realize the WEB service of different terminals, each element in the WEB page corresponding different code rate versions, and using meta-data as index stores in the web server proxy of multiple mobile terminal access can be provided.Like this, for each element Ii correspondence, a plurality of I _ij, I _ijrepresent I _ij code rate version, and by speed size, version is arranged, j=0,1 ... n.Wherein, I _i0represent I _icode rate version without any compression.

3, the adaptive flow process of the decomposition of the WEB page

For different terminals ability, the WEB page is decomposed to adaptive flow process as shown in Figure 1, mainly comprise the following steps:

(1) Business Stream of WEB content of pages is resolved into text, picture, voice, video four dvielements through media decomposition layer;

(2), at media processing layer, in conjunction with user preference, provide each element corresponding to the performance function V of different coding speed version _ij=F (f, p, I _ij), V wherein _ijshow that i element in the described WEB page usings the combination property weight of j code rate version during as last adaptive composite component, f is for different coding speed version I _ijthe distortion factor, p is the user preference factor;

(3) with ability of user terminal R _clientfor constraint, in conjunction with the performance function of each element different coding speed version, adopt following formula to select a best version of code to each element in the WEB page, and definite best-fit assembled scheme:

Function V=∑ V wherein _i, i=1,2 ... m is the performance function of the whole WEB page, under the restriction of terminal capability, makes function V reach maximum, in conjunction with terminal capability as constraints ∑ Size (I _i)≤R _client, constructive method equation group: $\left\{\begin{array}{c}V=\mathrm{\Σ}{V}_i\\ \mathrm{\ΣSize}\left(I_i\right)\≤R_{\mathrm{client}}\end{array}\right.,$ I=1 wherein, 2 ... m; Size (I wherein _i) represent that i element determine the file size after code rate version, Size (I _i)=t, { t ∈ Size (I _ij), Size (I _ij) represent that i element is according to the encode file size of this element of obtaining of j code rate version;

(4) in media delivery adaptation layer, with described best-fit assembled scheme, send WEB content of pages to user terminal.

4, the adaptation method of WEB content of pages

(1) related definition

T _wexpression starts to receive for terminal the patience time that data to data receives required wait for a WEB page user, sets the size of this parameter, unit during the service of customization WEB service: second.

R _clientthe maximum amount of data that expression user's mobile terminal can receive for a WEB page, R _client=B * T _w.

Defined function V _ij=F (f, p, I _ij) be element i for the performance function of code rate version j, wherein f represents the distortion factor of this version of code, p represents user preference.And defined function symbol V _irepresent that element i determines the performance function after code rate version, V _i=k, { k ∈ V _ij.

Defined function symbol Size (I _ij) represent that i element is according to the encode file size of this element of obtaining of j code rate version.Meanwhile, also define Size (I _i) represent that i element determine the file size after code rate version, Size (I _i)=t, { t ∈ Size (I _ij).Wherein, Size (I _i0) represent that i element is without the file size of any compressed encoding processing.

(2) for the adaptation method of different terminals ability

Function V _ij=F (f, p, I _ij) be for each element of the WEB page, in conjunction with different coding speed version I _ijthe distortion factor and user's performance function that the preference of content of pages is provided, this function shows that the i element in this WEB page usings the combination property weight of j code rate version during as last adaptive composite component.

In order to allow the selection adaptation of this WEB page reach best, need the performance function V=∑ V of the whole WEB page _i, i=1,2 ... m arrives maximum.Function V is the target function of the method.

In conjunction with terminal capability as constraints ∑ Size (I _i)≤R _client, for making target function V reach maximum, use Optimum Theory can select corresponding certain the code rate version number of each element, thereby obtain best-fit assembled scheme.

For performance function V _ij=F (f, p, I _ij), wherein each parameter and function expression are done to following explanation:

Defined parameters f represents that the elements such as text, picture are to because selecting different code rates to carry out the distortion factor producing after compressed encoding, $f=\frac{\ln [1+\mathrm{Size}\left(I_{\mathrm{ij}}\right)]}{\ln [1+\mathrm{Size}\left(I_{i0}\right)]}\≤1,$ This function is as factor of performance function.

Defined parameters p=p _c* p _sbe the user preference factor of each element.Wherein:

(1) WEB content priority p _c, be followed successively by from top to bottom: text, picture, voice, video.And define the p of text element _c=4, the p of picture element _c=3, the p of phonetic element _c=2, the p of video elementary _c=1;

(2) semantic priority p _s: the information such as theme, text, duplicate that obtain the WEB page by HTML semantic parser are carried out prioritization to each element of this WEB page, and set $p_s=\frac{1}{e^t},$ T is followed successively by 1,2,3... by theme, text, duplicate etc.;

By above distortion factor factor f and user preference factor p, form performance function, have following function expression: $V_{\mathrm{ij}}=F(f,p,I_{\mathrm{ij}})=p\×f=p_c\×p_s\×\frac{\ln [1+\mathrm{Size}\left(I_{\mathrm{ij}}\right)]}{\ln [1+\mathrm{Size}\left(I_{i0}\right)]};$

According to above performance function and terminal capability constraints, can list set of equations:

$\left\{\begin{array}{c}V=\mathrm{\Σ}{V}_i\\ \mathrm{\ΣSize}\left(I_i\right)\≤R_{\mathrm{client}}\end{array}\right.,$ I=1 wherein, 2 ... m

Meeting constraints ∑ Size (I _i)≤R _client, guarantee target function V=∑ V _iarrive maximum, application Optimum Theory can be selected corresponding certain the code rate version number of each element, thereby obtains best adaptive assembled scheme.

Claims (7)

1. the WEB content adaptation method based on terminal capability classification in mobile communication system, described mobile communication system comprises media decomposition layer, media processing layer and media delivery key-course, said method comprising the steps of:

(1) Business Stream of WEB content of pages is resolved into text, picture, voice, video four dvielements through media decomposition layer;

(2), at media processing layer, in conjunction with user preference, provide each element corresponding to the performance function V of different coding speed version _ij=F (f, p, I _ij), V wherein _ijshow that i element in the described WEB page usings the combination property weight of j code rate version during as last adaptive composite component, f is for different coding speed version I _ijthe distortion factor, p is the user preference factor;

(3) with ability of user terminal R _clientfor constraint, in conjunction with the performance function of each element different coding speed version, adopt following formula to select a best version of code to each element in the WEB page, and definite best-fit assembled scheme:

Function V=∑ V wherein _i, i=1,2 ... m is the performance function of the whole WEB page, under the restriction of terminal capability, makes function V reach maximum, in conjunction with terminal capability as constraints ∑ Size (I _i)≤R _client, constructive method equation group: $\left\{\begin{array}{c}V=\mathrm{\Σ}{V}_i\\ \mathrm{\ΣSize}\left(I_i\right)\≤R_{\mathrm{client}}\end{array}\right.,$ I=1 wherein, 2 ... m; Size (I wherein _i) represent that i element determine the file size after code rate version, Size (I _i)=t, { t ∈ Size (I _ij), Size (I _ij) represent that i element is according to the encode file size of this element of obtaining of j code rate version;

(4) in media delivery adaptation layer, with described best-fit assembled scheme, send WEB content of pages to user terminal.

2. according to the content adaptation method of claim 1, wherein said performance function V _ijin parameter distortion factor factor f by following formula, obtain:

$f=\frac{\ln [1+\mathrm{Size}\left(I_{\mathrm{ij}}\right)]}{\ln [1+\mathrm{Size}\left(I_{i0}\right)]}\≤1,$

Functional symbol Size (I wherein _i0) represent that i element is without the file size of any compressed encoding processing.

3. according to the content adaptation method of claim 1, the parametric user's preference factor p=p in wherein said performance function Vij _c* p _s, p wherein _cfor the priority of WEB content, p _sfor semantic priority.

4. according to the content adaptation method of claim 3, wherein according to order from big to small, arrange the priority p of text, picture, voice, video _c.

5. according to the content adaptation method of claim 1, ability of user terminal R wherein _client=B * T _w, wherein B is calculated as for amounting to according to the difference of the access of mobile terminal, processing, display capabilities the maximum bandwidth that this terminal is supported WEB content of pages, T _wexpression starts to receive for terminal the patience time that data to data receives required wait for a WEB page user.

6. according to the content adaptation method of claim 5, wherein when the service of definition customization WEB service, set T _wsize.

7. according to the content adaptation method of claim 1, wherein by following formula, determine performance function V _ij:

$V_{\mathrm{ij}}=F(f,p,I_{\mathrm{ij}})=p\×f=p_c\×p_s\×\frac{\ln [1+\mathrm{Size}\left(I_{\mathrm{ij}}\right)]}{\ln [1+\mathrm{Size}\left(I_{i0}\right)]}.$