CN102195734B - A kind of AU/TU pointer that is applicable to resolves the system controlled - Google Patents
A kind of AU/TU pointer that is applicable to resolves the system controlled Download PDFInfo
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- CN102195734B CN102195734B CN201010118583.XA CN201010118583A CN102195734B CN 102195734 B CN102195734 B CN 102195734B CN 201010118583 A CN201010118583 A CN 201010118583A CN 102195734 B CN102195734 B CN 102195734B
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Abstract
The invention discloses a kind of AU/TU pointer that is applicable to and resolve the system controlled, comprise: pointer parse state loom block comprises: pointer type state machine, detection I/D bit reversal module, described pointer type state machine is used for judging according to current pointer value the type that output state indicates, and detects the adjustment instruction type that I/D bit reversal module is used to indicate pointer.Pointer resolves LOP/AIS/NORMAL state machine sub-block, and the pointer type produced with pointer parse state machine, for foundation, carries out state transition, and output pointer lost condition indicates, alarm status instruction, and initial condition during reset is Loss Of Pointer state; Pointer value upgrades sub-block, and the positive negative justification instruction produced according to pointer parse state machine and new data indicator adjustment instruction, upgrade the value of pointer, and export positive justification index signal, negative justification index signal, new pointer regulation index signal.The invention solves the dispersiveness of the existing pointer dissection process of SDH.
Description
Technical field
The present invention relates to SDH light Network Communication field, particularly relate to a kind of AU/TU pointer that is applicable to and resolve the system controlled.
Background technology
In SDH light Network Communication technology, no matter do equipment or make tester, wherein having the process that very crucial, is exactly the process of AU, TU pointer, and is that a lot of place is repeatedly used.Pointer mechanism is the theoretical foundation that SDH system realizes synchronous multiplexing transmission.Introducing the concept of pointer in SDH, is exactly for phase locked, and specifically it is used to the phase difference that tackles between clock, comprises a small amount of frequency and looks into.The factor affecting the frequency of clock and phase place is a lot, and has many randomness, so pointer process must eliminate the impact of the phase difference between each clock in dynamic ground.
It is exactly accepted downstream end that pointer is resolved, and according to the pointer change that the Pointer generator of transmitting terminal is done, explanation promptly and accurately out, to upgrade current pointer value in time, reaches communication synchronous.Current pointer is resolved has dispersiveness, and independent process separately time originally, as when running into the process of AU-4 pointer, then processes the parsing of AU-4 pointer, when running into the pointer dissection process of TU-3, then process TU-3.So cause the waste of device resource, the speed that pointer is resolved is also comparatively slow, also bad investigation when encountering problems.
Summary of the invention
The object of the present invention is to provide a kind of integrated all kinds AU, the process of TU pointer, the AU/TU pointer that is applicable to reusability resolves the system controlled.
For achieving the above object, the technical solution used in the present invention is as follows:
Be applicable to AU/TU pointer and resolve the system controlled, comprising:
Pointer parse state loom block, comprise: pointer type state machine, detection I/D bit reversal module, described pointer type state machine is used for judging according to current pointer value the type that output state indicates, the type of described state instruction comprises: normal condition instruction, new pointer instruction, alarm instruction, pointer positive justification instruction, pointer negative justification instruction, the invalid instruction of pointer regulation, detects the adjustment instruction type that I/D bit reversal module is used to indicate pointer.
Pointer resolves LOP/AIS/NORMAL state machine sub-block, and the pointer type produced with pointer parse state machine, for foundation, carries out state transition, and output pointer lost condition indicates, alarm status instruction, and initial condition during reset is Loss Of Pointer state.
Pointer value upgrades sub-block, the positive negative justification instruction produced according to pointer parse state machine and new data indicator adjustment instruction, when keeping 3 frame, upgrade the value of pointer, and export positive justification index signal corresponding with it, negative justification index signal, new pointer regulation index signal according to pointer type.
Further, described pointer resolves pointer type that LOP/AIS/NORMAL state machine sub-block produces with pointer parse state machine for foundation, and the concrete methods of realizing carrying out state transition is as follows:
Under Loss Of Pointer state, when pointer regulation enable signal is effective, its built-in alarm indication counter is for calculating the number of alarm instruction instruction, when judging that continuous 3 frames indicate as alarm, state machine jumps to alarm status and the instruction of outputting alarm state, and the number that built-in normal condition indication counter indicates for calculating normal condition, when judging that continuous 3 frames indicate as normal condition, state machine jumps to normal condition, and exports normal condition instruction;
Under alarm status, when pointer regulation enable signal is effective, its built-in new pointer indication counter is for calculating the number of new pointer instruction, when judging as new pointer instruction or its built-in normal condition indication counter for the number calculating normal condition instruction, 1 frame judges that continuous 3 frames indicate as normal condition, state machine jumps to normal condition and exports normal condition instruction, otherwise when the disarmed state indication counter for the number calculating the invalid instruction of pointer regulation judges that continuous 8 frames indicate as disarmed state, state machine jumps to Loss Of Pointer state and the instruction of output pointer lost condition,
In normal state, when pointer regulation enable signal is effective, when its built-in alarm indication counter for the number calculating alarm instruction judges that continuous 3 frames indicate as alarm, state machine jumps to alarm indicating status and the instruction of outputting alarm state, otherwise state machine jumps to Loss Of Pointer state and output pointer lost condition indicates when judging that continuous 8 frames indicates as disarmed state for the disarmed state indication counter of the number calculating the invalid instruction of pointer regulation or when new pointer indication counter judges that continuous 8 frames indicate as new pointer.
Further, described pointer value processes pointer value after upgrading the adjustment index signal of pointer regulation state that sub-block reception produces to LOP/AIS/NORMAL state machine and the output of pointer parse state loom block, the implementation method producing current up-to-date pointer value is: described pointer value processes pointer value after upgrading the adjustment index signal of pointer regulation state that sub-block reception produces to LOP/AIS/NORMAL state machine and the output of pointer parse state loom block, the implementation method producing current up-to-date pointer value is: if in normal state adjust index signal be positive justification index signal and adjustment position enable effective time, pointer value adds 1 and exports, if adjustment index signal is negative justification index signal, then pointer value subtracts 1 and exports, if adjustment index signal is new pointer regulation index signal, the pointer value then exported is the value of current pointer value lower than 10 bits, under Loss Of Pointer state and pointer alarm status and adjustment position enable effective time, the pointer value of output is 1111111111.
Further, described pointer value is upgraded sub-block and is judged by counter and keep 3 frames, and concrete grammar is as follows:
Step 1, the initial condition value of counter is 0, and after pointer value upgrades sub-block reception to pointer regulation index signal, counter adds 1, and adjusts pointer now;
Step 2, after pointer value renewal sub-block receives pointer regulation index signal again, counter adds 1, and the value of this hour counter becomes 2, and the rest may be inferred, and when the value of counter is 4, the value that counter reverts to initial condition and counter is 0, repeats step 1.
Beneficial effect of the present invention
The invention solves the problem that SDH pointer resolves (Pointergeneration), integrated all kinds AU, the process of TU pointer.There is reusability, cheap SDH multiplexing.Solve the dispersiveness of SDH existing pointer dissection process, this functional module covering all pointer treatment mechanisms improves the efficiency that pointer is resolved, and saves the resource of device, improves module work speed, and encountering problems can immediately orientation problem.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the present invention one specific embodiment;
Fig. 2 is the state transition schematic diagram that embodiment of the present invention pointer resolves LOP/AIS/NORMAL state machine sub-block.
Inc_ind/dec_ind: the positive negative justification instruction of pointer;
3xnormal_p: continuous 3 frames are normal pointer instructions;
Ndf_en: single ndf_en instruction;
3xais_ind: continuous 3 frame ais alarms;
8xinvalid: continuous 8 frames are null pointers;
8xndf_ena: continuous 8 frames are the instruction of new pointer.
Embodiment
See accompanying drawing 1, a kind of AU/TU pointer that is applicable to resolves the system controlled, and it is characterized in that comprising:
Pointer parse state machine (PointerintepretationFSM) sub-block comprises: pointer type state machine, detect I/D bit reversal module, described pointer type state machine is used for judging according to current pointer value c_ptrbyte the type ptrv_type that output state indicates, the type of described state instruction comprises: normal condition instruction normal_p, new pointer instruction ndf_en, alarm instruction ais_ind, pointer positive justification instruction inc_ind, pointer negative justification instruction dec_ind, pointer regulation invalid instruction invlid, detect the adjustment Status Type that I/Dbit reversal block is used to indicate pointer.Specific as follows:
When judge c_ptrbyte=complete 1 time, then state instruction type ptrv_type be alarm status instruction ais_ind, otherwise state instruction type ptrv_type be disarmed state instruction invalid; When the high 4bit (i.e. SSSS) judging types value ptrv_type that state indicates is 1001, state instruction type is the instruction of new pointer regulation, according to the principle of majority vote, 0001,1101,1011,1000 can regard as the instruction of new pointer, otherwise state instruction type is disarmed state instruction invalid; SSSS=0110 when pointer is normal, the principle of majority vote equally, when judging SSSS=0110/1110/00110/0100/0111, state instruction type ptrv_type is normal condition instruction normal_p, if detect I/Dbit reversion sub-block have the reversion of I or Dbit majority, the adjustment Status Type ptrv_type that can regard as pointer is positive justification instruction inc_ind or negative justification instruction dec_ind, otherwise is disarmed state instruction invalid.
Pointer resolves LOP/AIS/NORMAL state machine sub-block, the pointer type ptrv_type produced with pointer parse state machine is for foundation, carry out state transition, and output pointer lost condition instruction lop_o, alarm instruction ais_o, normal condition instruction normal_o, initial condition during reset is Loss Of Pointer state.
See accompanying drawing 2, under Loss Of Pointer state lop, when pointer regulation enable signal is effective, the number that its built-in alarm indication counter cnt_aisptr indicates for calculating alarm instruction (ais_ind), when judging continuous 3 frames as alarm instruction ais_ind, state machine jumps to alarm status ais and the enable ais_o of outputting alarm state, built-in normal condition indication counter cnt_normalptr is for calculating the number of normal condition instruction, when judging continuous 3 frames as normal condition instruction normal_p, state machine jumps to normal condition normal;
Under alarm status AIS, when pointer regulation enable signal is effective, its built-in new pointer indication counter cnt_ndfptr is for calculating the number of new pointer instruction, when judging that 1 frame judges continuous 3 frames as normal condition instruction normal_p as new pointer instruction or its built-in normal condition indication counter cnt_normalptr for the number calculating normal condition instruction, state machine jumps to normal condition, otherwise when the disarmed state indication counter cnt_invptr for the number calculating the invalid instruction of pointer regulation judges continuous 8 frames as disarmed state instruction invalid, state machine jumps to Loss Of Pointer state LOP and the enable lop_o of output pointer lost condition,
Under normal condition NORMAL, when pointer regulation enable signal is effective, when its built-in alarm indication counter cnt_aisptr for the number calculating alarm instruction judges continuous 3 frames as alarm instruction ais_ind, state machine jumps to alarm indicating status ais and the enable ais_o of outputting alarm indicating status, otherwise the disarmed state indication counter cnt_invsptr for the number calculating the invalid instruction of pointer regulation judges that continuous 8 frames are as during disarmed state instruction invalid or when new pointer indication counter cnt_ndfptr judges that continuous 8 frames jump to Loss Of Pointer state lop and output pointer lost condition instruction lop_o as state machine during new pointer instruction ndf_en.
Pointer value upgrades (Pointervalueupdate) sub-block, the pointer regulation state ptr_state produced according to pointer parse state machine and positive negative justification indicate and the instruction of new pointer regulation, when keeping 3 frame, upgrade the value of pointer, and export corresponding with it positive justification index signal inc_ind_o, negative justification index signal dec_ind_o, new pointer regulation index signal ndf_ind_o according to pointer type.
Described pointer processes pointer value after upgrading the adjustment index signal that sub-block reception produces to LOP/AIS/NORMAL state machine, and the implementation method producing current up-to-date pointer value (c_ptr_v_o) is:
The generation of positive/negative/new pointer regulation index signal: according to pointer regulation state ptr_state, under ptr_state=normal_s (normal condition) state, if pointer regulation type ptrv_type=inc_ind (positive justification instruction), inc_ind_o is enable for then positive justification index signal, if pointer regulation type ptrv_type=dec_ind (negative justification instruction), de_ind_o is enable for then negative justification index signal, if ptrv_type=ndf_en, then new pointer index signal ndf_ind_o is enable;
The renewal of positive/negative adjustment pointer value: according to pointer regulation state ptr_state, under ptr_state=normal (normal condition) state, if adjustment position enable (rsp_en) is effective and positive justification index signal inc_ind_o is enable, c_ptr_v_o adds 1, if adjustment position enable (rsp_en) is effective and negative justification index signal dec_ind_o is enable, c_ptr_v_o subtracts 1;
The renewal of new pointer value: according to pointer regulation state ptr_state, under ptr_state=normal (normal condition) state, if the adjustment enable rsp_en in position is effective and new pointer index signal ndf_ind_o is enable, the value of c_ptr_v_o equals the value of low 10 bits of c_ptrbyte;
LOP alarm: according to ptr_state, under ptr_state=lop (Loss Of Pointer state) state, then lop_o output enable, simultaneously c_ptr_v_o=1111111111;
AlS alarm: according to ptr_state, under pointer regulation state ptr_state=ais_s (pointer alarm) state, then ais_o output enable, simultaneously c_ptr_v_o=1111111111.
Described pointer value is upgraded sub-block and is judged by counter and keep 3 frames, and concrete grammar is as follows:
Step 1, the initial condition value of counter is 0, and after pointer value upgrades sub-block reception to pointer regulation index signal, counter adds 1, and adjusts pointer now;
Step 2, after pointer value renewal sub-block receives pointer regulation index signal again, counter adds 1, and the value of this hour counter becomes 2, and the rest may be inferred, and when the value of counter is 4, the value that counter reverts to initial condition and counter is 0, repeats step 1.
Claims (1)
1. be applicable to AU/TU pointer and resolve the system controlled, it is characterized in that comprising:
Pointer parse state loom block, comprise: pointer type state machine, detection I/D bit reversal module, described pointer type state machine is used for judging according to current pointer value the type that output state indicates, the type of described state instruction comprises: normal condition instruction, new pointer instruction, alarm instruction, pointer positive justification instruction, pointer negative justification instruction, the invalid instruction of pointer regulation, detects the adjustment instruction type that I/D bit reversal module is used to indicate pointer;
Pointer resolves LOP/AIS/NORMAL state machine sub-block, and the pointer type produced with pointer parse state machine, for foundation, carries out state transition, and output pointer lost condition indicates, alarm status instruction, and initial condition during reset is Loss Of Pointer state;
Pointer value upgrades sub-block, the positive negative justification instruction produced according to pointer parse state machine and new data indicator adjustment instruction, when keeping 3 frame, upgrade the value of pointer, and export positive justification index signal corresponding with it, negative justification index signal, new pointer regulation index signal according to pointer type, described pointer value processes pointer value after upgrading the adjustment index signal of pointer regulation state that sub-block reception produces to LOP/AIS/NORMAL state machine and the output of pointer parse state loom block, the implementation method producing current up-to-date pointer value is: if in normal state adjust index signal be positive justification index signal and adjustment position enable effective time, pointer value adds 1 and exports, if adjustment index signal is negative justification index signal, then pointer value subtracts 1 and exports, if adjustment index signal is new pointer regulation index signal, the pointer value then exported is the value of current pointer value lower than 10 bits, under Loss Of Pointer state and pointer alarm status and adjustment position enable effective time, the pointer value of output is 1111111111,
Described pointer value is upgraded sub-block and is judged by counter and keep 3 frames, and concrete grammar is as follows:
Step 1, the initial condition value of counter is 0, and after pointer value upgrades sub-block reception to pointer regulation index signal, counter adds 1, and adjusts pointer now;
Step 2, after pointer value renewal sub-block receives pointer regulation index signal again, counter adds 1, and the value of this hour counter becomes 2, and the rest may be inferred, and when the value of counter is 4, the value that counter reverts to initial condition and counter is 0, repeats step 1;
Described pointer resolves pointer type that LOP/AIS/NORMAL state machine sub-block produces with pointer parse state machine for foundation, and the concrete methods of realizing carrying out state transition is as follows:
Under Loss Of Pointer state, when pointer regulation enable signal is effective, its built-in alarm indication counter is for calculating the number of alarm instruction, when judging that continuous 3 frames indicate as alarm, state machine jumps to alarm status and the instruction of outputting alarm state, and the number that built-in normal condition indication counter indicates for calculating normal condition, when judging that continuous 3 frames indicate as normal condition, state machine jumps to normal condition, and exports normal condition instruction;
Under alarm status, when pointer regulation enable signal is effective, its built-in new pointer indication counter is for calculating the number of new pointer instruction, when judging as new pointer instruction or its built-in normal condition indication counter for the number calculating normal condition instruction, 1 frame judges that continuous 3 frames indicate as normal condition, state machine jumps to normal condition and exports normal condition instruction, otherwise when the disarmed state indication counter for the number calculating the invalid instruction of pointer regulation judges that continuous 8 frames indicate as disarmed state, state machine jumps to Loss Of Pointer state and the instruction of output pointer lost condition,
In normal state, when pointer regulation enable signal is effective, when its built-in alarm indication counter for the number calculating alarm instruction judges that continuous 3 frames indicate as alarm, state machine jumps to alarm indicating status and the instruction of outputting alarm state, otherwise state machine jumps to Loss Of Pointer state and output pointer lost condition indicates when judging that continuous 8 frames indicates as disarmed state for the disarmed state indication counter of the number calculating the invalid instruction of pointer regulation or when new pointer indication counter judges that continuous 8 frames indicate as new pointer;
The described AU/TU of being applicable to pointer is resolved the system controlled and is applicable to AU type pointer and TU type pointer.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101159529A (en) * | 2007-10-26 | 2008-04-09 | 中兴通讯股份有限公司 | Method and system of reducing error code of service |
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| JP3689295B2 (en) * | 2000-01-19 | 2005-08-31 | アンリツ株式会社 | SDH test equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101159529A (en) * | 2007-10-26 | 2008-04-09 | 中兴通讯股份有限公司 | Method and system of reducing error code of service |
Non-Patent Citations (1)
| Title |
|---|
| SDH分/插复用器ADM的设计与实现;邓晓飞;《中国优秀硕士学位论文全文数据库 信息科技辑》;20090131;第48-51、56-57页 * |
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Address after: 545006 the Guangxi Zhuang Autonomous Region Avenue in the City District of Liuzhou city in Guangxi, No. 17, science and Technology Park Patentee after: Liuzhou Dadi telecommunication technology Limited by Share Ltd Address before: 100083 Beijing city Haidian District Wudaokou Dongsheng Park Huaqingjiayuan No. 7 Building 1601 room Patentee before: Liuzhou Dadi Telecommunication Equipment Co., Ltd. |