Re: Context Switching in SS7 Context

["Toan" <toan@usa.net>]

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> Nha^n noi' ve^` chu*~ context, kho^ng bie^'t ma^'y ba'c CS co'
> nghe to*'i cu.m tu*` "context switching" kho^ng? Tu*` na`y ra^'t
> tho^ng du.ng trong nga`nh to^i la`m (telecom/SS7), nhu*ng ne^'u
> co' ai ba<'t di.ch ra tie^'ng Vie^.t thi` co' le~ to^i pha?i
> dda^`u ha`ng tho^i. Cho to^i switch qua English context dde^? 
> gia?i thi'ch ro~ ho*n.
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To^i co' nghe mo^.t ti' ve^` tru+o+`ng ho+.p cu?a ba'c; vo^'n la` co' ba`
con la`m nghe^` ddo', va` ho. gia?ng cho nghe so+ qua.

Switch Conext na`y kho^ng la` ddo^?i <va(n ma.ch> hay <va(n ca?nh>, cha?
la` <va(n >hay <chu+~, tu+`> gi` ca? ma` la` <TIN>. 

Va^.y la` <ddo^?i luo^`n tin, tra'o luo^`n tin, hay hoa'n luo^`n tin> no'i
ra co' le~ se~ hie^?u ddu+o+.c. Hoa(.c ne^'u luo^`n (to^i nghi~ luo^`n la`
vi` hu+o+'ng cu?a tin cha.y va`o ) kho^ng ho+.p thi` du`ng ma.ch cu~ng
ddu+o+.c: chuye^?n ma.ch tin, hoa'n ma.ch tin, v.v...
 
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> 'Context' in this (particular and narrow) sense represents a "set of 
> data" associated with a particular SS7 message and is used by the SS7 
> network elements to properly identify and route the call. In order for 
> a network element to process multiple messages in real time, the 
> ability to store and restore (i.e. switch between) context information 
> for any message is required. The software implementation for this 
> capability is known in my professional world as "context switching"
> and involves what is called a "context stack".
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Context Stack= cho^`ng, cha^'t, xe^'p luo^`n/ma.ch tin?

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> Allow me to now switch back to a Viet context. Cho ne^n chu*~ text 
> trong "context" trong "SS7 context" (recursive context??? :)) cha<?ng 
> di'nh da'ng gi` dde^'n chu*~ va<n ca?. Va^.y thi` pha?i ti'nh la`m sao 
> dda^y ma^'y ba'c?
======

Cu~ng ta^.t ta`o lao cu?a to^i chu+' to^i kho^ng trong ma^'y nga`nh na`y
(nhu+ng cu~ng thi'ch ti`m hie^?u)
Ba'c co' thie^.t muo^'n ba`n ve^` <recursive context> kho^ng? Ne^'u co'
thi` pha?i tri`nh ba`y ro~ no' la` ca'i gi` dda~ chu+' to^i dda^y bi' lu`
tho^i.

Nhu+ng ne^'u ddoa'n mo` thi` <recursive> theo ddie^.n va` tin chu+a ha(?n
co' nghi~a ta'i die^~n, tu+'c la^.p la.i, ma` co`n co' the^? la` <do^`n
da^.p>. Cu+' nhu+ tin a^.p va` va` do^`n tie^'p va`o , ma'y va` la^.p
tri`nh pha?i tie^'p tu.c chuye^?n, hoa'n, cha^'t ca'c ma.ch tin do^`n va`o
va` luo^`n ra ngoa`i qua ca'c ke^nh/tuye^'n vu+`a mo+? tro^'ng.


To^i ta`o lao dde^'n dda^y co`n pha^`n du+o+'i kho^ng bie^'t ne^n chu+`a
ddo'.

Toa`n
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> Co`n chu*~ "recursion" cu~ng ra<'c ro^'i go*'m. Xin ma^'y ba'c giu'p 
> luo^n y' kie^'n cho.
> 
> Ian
> 
> ps. ho^m no. co' tha^'y message (hi`nh nhu* cua? ba'c AnHai) ho?i ve^` 
> OSI vs. internet protocol. Hai ca'i na`y kho^ng co' lie^n he^. gi`
> vo*'i nhau ma^'y, kho^ng hie^?u y' ba'c muo^'n ho?i gi` ne^n kho' ma` 
> tra? lo*`i cho ddu'ng theo... context :)) Ne^'u ba'c clarify ca^u ho?i 
> cu?a mi`nh the^m ti' nu*~a thi` may ra to^i co' the^? giu'p ba'c.
> 
> pps. nghe no'i VN ta da.o na`y ca^`n SS7 la<'m, ba'c na`o am hie^?u
> ti`nh hi`nh xin ke^? cho to^i nghe vo*'i. thanks! :)
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