Agreement (TS27.010) of multiplexing of serial communication outcomes of data terminal equipment and wireless communication module Development, using the technical rapid growth and development of mobile communication within the embedded system, the movable termination with wireless communication function is developed quickly too. These movable terminations support business like the regular speech, short message, using the fast enlargement of G P R S network overlapping, it’s held that progressively many / the automobile transported movable termination starts to aid G P R S business of networking too. What the process of integration on the terminal installation, they are questions that many mobile terminal device designers face. I’ve adopted T S 2 7 of three G P P throughout creating a vehicle transported movable termination. 010 contracts, the process of integration effectively.
1 T S 2 7 . 010 agreement introductions
In generally used G S M / G P R S communication module (for example Q 2400 of M 35, W a v e C o m of S i e m e n s) ,Are only able to pass regular 9 for just one Asynchronous serial port and terminal installation T E (T e r m i n a l E q u i p m e n t) from the needle Keep on communication. T E and M S ? M o b i l e S t a t i o n Have to exchange various typological data through this serial port, for instance: Maintenance, battery condition, G P R S, U S S D of pronunciation, fax, data, S M S, C B S, phone number one,etc.. How you can support a lot business on the serial port simultaneously? For instance, in data communication, how you can send or receive S M S? To be able to solve these complaints, 3 G P P has suggested a contract –T S 2 010 contracts ( T e r m i n a l E q u i p m e n t t o M o b i l e S t a t i o n M u l t i p l e x e r P r o t o c o l ) . There’s M u l t i p l e x e r, even can send S M S in data connection. Other business will go onto constitute simultaneously too. For instance, digital speech and S M S are sent simultaneously. The presence of M u l t i p l e x e r bakes an intact system divide based upon need.
M u l t i p l e x e r style of 3 G P P is extremely flexible, and it is separate from M S / T E platform, the present utility program doesn’t need altering and may work. While creating M u l t i p l e x e r, especially take into account that switches into the interest in battery-opwered apparatus, so include extremely important functions like the mode charge of electric-saving,etc., and M u l t i p l e x e r tries difficult to use minimum energy consumption and memory throughout operation.
M u l t i p l e x e r is dependant on H D L C standard style of I S O, works underneath the single mode with lots of types of options. But B a s i c O p t i o n doesn’t adhere to H D L C. Under essentially choosing the mode, M u l t i p l e x e r doesn’t have transparent mechanism, there’s not really a error correction function. But advanced to choose (A d v a n c e d O p t i o n) Underneath the mode, make use of the transparent mechanism of H D L C, and M u l t i p l e x e r includes a synchronization mechanism of convenience, could be in D C 1 / D C 3 (X O N / X O F F) Focus on the periodic line switched on in flow control, and can include the mistake correction function.
M u l t i p l e x e ur of 3 G P P is dependent on the control funnel. About this control funnel, T E trades control information, for instance the parameter control information, flow control information,etc. of talking to, economizing on electricity with M S. M u l t i p l e x e r is that certain can choose, if support this function, should make use of a T C M U X command to activate it. M u l t i p l e x e r is T E and M S reaches each initial /stop modal, transmit the information flow to provide a group of systems on serial periodic type of the subframe function. Fig. 1 provides different protocol layers and processes to hint. The M u l t i p l e x e r layer accounts for transmitting the way in which the information flow based on the byte, don’t keep on the further framework again When the data need transmitting based on certain structure, need growing one convergence layer finishes these characteristics.
M u l t i p l e x e r is photogenic for that process sum M S on T E to supply one for procedure for responding to virtually for connecting, T E and process in the M S can virtual for connecting communication through this piece in by doing this. For instance, S M S utility program on T E could be associated with M S S M S handler on via a M u l t i p l e x e r passway. T S 2 010 norms use s t a r t – s t o p mode of transmission of 8 b i t character, the communication between two M u l i t p l e x e r organizations has utilized the required frame format. Each signal funnel between T E and M S is known as an information link connection D L C (D a t a L i n k C o n n e c t i o n) ,These D L C is to establish individually sequentially. Flow control mechanism that every D L C could be a person’s own.
M u l t i p l e x e r has three types of work designs: B a s i c, A d v a n c e d w i t h o u t e r r o r r e c o v e r y along with a d v a n c e d w i t h e r r o r r e c o v e r y . These 3 types of mode qualities are the following:
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