WO1998038737B1 - Pulse position modulation communications protocol - Google Patents
Pulse position modulation communications protocolInfo
- Publication number
- WO1998038737B1 WO1998038737B1 PCT/US1998/000383 US9800383W WO9838737B1 WO 1998038737 B1 WO1998038737 B1 WO 1998038737B1 US 9800383 W US9800383 W US 9800383W WO 9838737 B1 WO9838737 B1 WO 9838737B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- time interval
- recited
- amended
- pulse
- packet
- Prior art date
Links
- 230000000051 modifying Effects 0.000 title claims abstract 5
- 230000002708 enhancing Effects 0.000 claims abstract 5
- 230000000977 initiatory Effects 0.000 claims abstract 3
- 230000000116 mitigating Effects 0.000 claims abstract 3
- 238000001514 detection method Methods 0.000 claims 4
- 238000005562 fading Methods 0.000 claims 2
Abstract
A method for modulating a radio signal has the steps of: predetermining a first time interval (A) so as to define a data word (14); generating a synchronization pulse (10), the synchronization pulse initiating a single data word having a length of the predetermined first time interval; and generating a single data pulse within the data word after a second time interval (C) with respect to the synchronisation pulse, the length of the second time interval defining at least one character. Defining at least one character by a single data pulse after a second time interval with respect to the synchronization pulse enhances an energy efficiency of the transmitted radio signal which mitigating a duty cycle thereof.
Claims
1. (Amended) A method for modulating a radio signal, the method comprising the steps of: a) predetermining a first time interval so as to define a data word; b) generating a synchronization pulse, the synchronization pulse initiating a single data word having a length of the predetermined first time interval ; and c) generating a single data pulse within the data word after a second time interval with respect to the synchronization pulse, the length of the second time interval defining at least one character; d) wherein defining at least one character by the single data pulse after the predetermined first time interval with respect to the synchronization pulse enhances an energy efficiency of the radio signal while mitigating a duty cycle thereof .
2. The method as recited in Claim 1 wherein the length of the second time interval defines only one character.
3. (Amended) The method as recited in Claim 1 wherein the step of generating the single data pulse after a predetermined time interval comprises : a) generating the single data pulse having a pulse width of between approximately 200 μsec and approximately 250 μsec; and b) the predetermined first time interval comprises a time interval approximately equal to a multiple of between 600 μsec and 750 μsec.
4. (Amended) The method as recited in Claim 1 wherein the step of predefining the first time interval is repeated for each data word modulated and is different for at last two data words.
5. The method as recited in Claim 1 wherein a plurality of characters so defined in turn define a
packet, the packet being of a duration of less that approximately 0.5 seconds so as to mitigate fading, a plurality of such packets defining a message.
6. The method as recited in Claim 5 further comprising the step of transmitting the message multiple times consecutively so as to enhance a probability of proper reception thereof .
7. The method as recited in Claim 6 further comprising the steps of : a) transmitting information indicative of the packet's position within the message along with each packet ; b) transmitting information indicative of the number of times that the message has been transmitted along with each message; and c) transmitting error detection information along with each packet.
8. The method as recited in Claim 7 wherein the step of transmitting error detection information comprises transmitting a differential checksum calculated by alternately adding and subtracting the lengths of sequential second time intervals.
9. A method for modulating a radio signal, the method comprising the steps of -. a) predetermining a first time interval so as to define a data word; b) generating a synchronization pulse, the synchronization pulse initiating a plurality of contiguous data words, each data word having a length of the predetermined first time interval; and c) generating a single data pulse within each data word, each data pulse being generated after a second time interval with respect to a beginning of the data word within which it is generated, the length of the second time interval defining at least one character;
d) wherein so defining a plurality of characters utilizing a single synchronization pulse enhances an energy efficiency of the transmitted radio signal while mitigating a duty cycle thereof.
10. The method as recited in Claim 9 wherein the length of the second time interval for the single data pulse within each data word defines only one character.
11. The method as recited in Claim 9 further comprising the step of providing a time delay intermediate adjacent data words so as to facilitate processing thereof during demodulation.
12. The method as recited in Claim 9 wherein a plurality of characters so defined in turn define a packet, each packet being of a duration of less that approximately 0.5 seconds so as to mitigate fading, a plurality of such packets defining a message.
13. The method as recited in Claim 12 further comprising the step of transmitting the message multiple times consecutively so as to enhance a probability of proper reception thereof.
14. The method as recited in Claim 13 further comprising the steps of : a) transmitting information indicative of the packet's position within the message along with each packet; b) transmitting information indicative of the number of times that the message has been transmitted along with each message; and c) transmitting error detection information along with each packet.
15. The method as recited in Claim 15 wherein the step of transmitting error detection information comprises transmitting a differential checksum calculated by alternately adding and subtracting the lengths of sequential second time intervals.
16. (Amended) A method for demodulating a radio signal, the method comprising the steps of:
a) periodically monitoring an input port for the presence of a given state; b) storing the predetermined number of the monitored states; c) determining that the synchronization pulse has been received when a predetermined number of the stored states of the input port are in the given state; d) starting a clock when a synchronization pulse has been determined to have been received; e) again periodically monitoring the input port for the presence of the given state; f) again storing the predetermined number of the monitored states; g) determining that the data pulse has been received when a predetermined number of the stored states of the input port are in the given state; h) reading a time interval from the clock when it has been determined that a data pulse has been received; and i) using the length of the time interval to define a character being represented thereby.
17. (Amended) The method as recited in Claim 16 wherein the step of periodically monitoring the input port for the presence of the given state comprises periodically monitoring the input port for the presence of a high state.
18. (Amended) The method as recited in Claim 16 wherein the step of periodically monitoring the input port for the presence of the given state comprises monitoring the input port at time intervals of between approximately 25 μsec and approximately 40 μsec.
19. (Amended) The method as recited in Claim 16 wherein the step of determining that the pulse has been received when the predetermined number of the stored states of the input port are in the given state comprises determining that the pulse has been received when six of
the last eight stored states of the input port are in a given state.
20. (Amended) The method as recited in Claim 16 wherein the step of storing the predetermined number of the monitored states comprises storing the monitored states in a software implementation of a first in/first out buffer.
STATEMENT UNDER ARTICLE 19
The claims have been amended to conform to the claims allowed in the priority (U.S.) application which were initially rejected based on the same cited references.
Claims 1, 3-4 and 16-20 have been amended to clarify the claims. Claim 1 has been amended to delete "transmitted," thereby negating any need for an antecedent basis and correcting Claims 1-15.
The Applicant has amended Claim 3 to show that the data pulse described, is the same data pulse as in Claim 1.
The Applicant has amended Claims 17 and 18 to show that given state described, is the same given state as in Claim 16.
In view of the foregoing, amended Claims 1, 3, 4, and 16-20 are respectfully submitted.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9919394A GB2337432B (en) | 1997-02-27 | 1998-01-12 | Pulse position modulation communications protocol |
| DE19882144T DE19882144B4 (en) | 1997-02-27 | 1998-01-12 | Communication protocol with pulse position modulation |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/807,299 | 1997-02-27 | ||
| US08/807,299 US5844942A (en) | 1997-02-27 | 1997-02-27 | Pulse position modulation communications protocol |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1998038737A1 WO1998038737A1 (en) | 1998-09-03 |
| WO1998038737B1 true WO1998038737B1 (en) | 1998-11-19 |
Family
ID=25196054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1998/000383 WO1998038737A1 (en) | 1997-02-27 | 1998-01-12 | Pulse position modulation communications protocol |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5844942A (en) |
| DE (1) | DE19882144B4 (en) |
| GB (1) | GB2337432B (en) |
| WO (1) | WO1998038737A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3080907B2 (en) * | 1997-07-22 | 2000-08-28 | 日本電気アイシーマイコンシステム株式会社 | Modulation / demodulation method and modulation / demodulation device |
| US6198766B1 (en) | 1998-03-17 | 2001-03-06 | International Business Machines Corporation | Method and apparatus for adaptive pre-demodulation pulse shaping |
| US6976034B1 (en) * | 1999-10-28 | 2005-12-13 | Lightwaves Systems, Inc. | Method of transmitting data including a structured linear database |
| FR2802688B1 (en) * | 1999-12-20 | 2002-02-08 | Commissariat Energie Atomique | METHOD FOR TRANSMITTING INFORMATION FROM AN INTERROGATING DEVICE TO PORTABLE OBJECTS |
| US6946951B2 (en) * | 2000-12-29 | 2005-09-20 | Tagsys Australia Pty Ltd. | System and method for interrogating electronic labels |
| WO2002071683A1 (en) * | 2001-03-06 | 2002-09-12 | Siemens Aktiengesellschaft | Synchronization method for use in an ultra- broadband communication system |
| EP1239626A1 (en) * | 2001-03-06 | 2002-09-11 | Siemens Aktiengesellschaft | Method of synchronisation for use in a ultra-broadband communication system |
| US7167913B2 (en) * | 2002-06-05 | 2007-01-23 | Universal Electronics Inc. | System and method for managing communication links |
| US7002472B2 (en) * | 2002-09-04 | 2006-02-21 | Northrop Grumman Corporation | Smart and secure container |
| DE102005013638C5 (en) * | 2005-03-24 | 2011-02-24 | Techem Energy Services Gmbh & Co. Kg | Method for the radio-supported transmission of data and the consumption meter |
| CN106549748B (en) * | 2015-09-21 | 2019-08-27 | 天地融科技股份有限公司 | A kind of data transmission method and data processing equipment |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3852574A (en) * | 1972-11-06 | 1974-12-03 | A Bilgutay | Digital rate meter |
| WO1984003404A1 (en) * | 1983-02-28 | 1984-08-30 | Mitsubishi Electric Corp | Pcm signal transfer system |
| JPS60177745A (en) * | 1984-02-23 | 1985-09-11 | Nippon Telegr & Teleph Corp <Ntt> | Optical telephone system |
| JPS6218140A (en) * | 1985-07-16 | 1987-01-27 | Mitsubishi Electric Corp | Receiver of digital communication equipment |
| US4697182A (en) * | 1985-09-16 | 1987-09-29 | Sangamo Weston, Inc. | Method of and system for accumulating verifiable energy demand data from remote electricity meters |
| DE3732287A1 (en) * | 1987-09-25 | 1989-04-06 | Ant Nachrichtentech | METHOD AND CIRCUIT ARRANGEMENT FOR DERIVING THE WORD CLOCK OF A PULSE POSITION-MODULATED SIGNAL |
| US4888791A (en) * | 1988-01-25 | 1989-12-19 | Barndt Sr Robert A | Clock decoder and data bit transition detector for fiber optic work station |
| US4873663A (en) * | 1988-04-25 | 1989-10-10 | American Telephone And Telegraph Company | Control memory using recirculating shift registers for a TDM switching apparatus |
| US5010568A (en) * | 1989-04-04 | 1991-04-23 | Sparton Corporation | Remote meter reading method and apparatus |
| IL91439A (en) * | 1989-08-25 | 1994-10-07 | Arad Ltd | System for measuring and recording a utility consumption |
| FR2652215B1 (en) * | 1989-09-19 | 1994-06-10 | France Etat | METHOD FOR ENCODING A DIGITAL SIGNAL, ENCODER AND DECODER FOR IMPLEMENTING SAID METHOD, REGENERATION METHOD AND CORRESPONDING REGENERATOR. |
| US5193111A (en) * | 1989-12-04 | 1993-03-09 | Abb Power T&D Company | Automated data transmission system |
| CA2070432A1 (en) * | 1990-01-22 | 1991-07-23 | Paul B. Wyborny | Telemetry format |
| DE4014931A1 (en) * | 1990-05-10 | 1991-11-14 | Telefunken Electronic Gmbh | DATA TRANSFER SYSTEM |
| US5206909A (en) * | 1991-01-18 | 1993-04-27 | Gte Government Systems Corporation | Method for secure PPM-based laser communications |
| US5243626A (en) * | 1991-08-29 | 1993-09-07 | Apple Computer, Inc. | Method for clocks synchronization for receiving pulse position encoded signals |
| US5241568A (en) * | 1991-12-02 | 1993-08-31 | Motorola, Inc. | Method and apparatus for synchronizing a receiver to a transmitted signal while conserving power |
| KR950006698B1 (en) * | 1992-01-11 | 1995-06-21 | 삼성전자주식회사 | The data receiving control device of remote controller |
| US5469153A (en) * | 1992-10-30 | 1995-11-21 | General Electric Company | Method of serially processing binary characters asynchronously received by an electrical energy meter |
| US5394410A (en) * | 1992-10-30 | 1995-02-28 | International Business Machines Corporation | Differentially coded and guard pulse position modulation for communication networks |
| US5493287A (en) * | 1994-03-07 | 1996-02-20 | Motorola, Inc. | Method of remotely reading a group of meters |
| JPH0951358A (en) * | 1995-08-09 | 1997-02-18 | Mitsubishi Electric Corp | Pwm communication system |
-
1997
- 1997-02-27 US US08/807,299 patent/US5844942A/en not_active Expired - Fee Related
-
1998
- 1998-01-12 GB GB9919394A patent/GB2337432B/en not_active Expired - Fee Related
- 1998-01-12 DE DE19882144T patent/DE19882144B4/en not_active Expired - Fee Related
- 1998-01-12 WO PCT/US1998/000383 patent/WO1998038737A1/en active Application Filing
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