IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0276148
(2008-11-21)
|
| 등록번호 |
US-8144680
(2012-03-27)
|
|
발명자
/ 주소 |
|
| 출원인 / 주소 |
|
| 대리인 / 주소 |
Kilpatrick Townsend & Stockton LLP
|
| 인용정보 |
피인용 횟수 :
0 인용 특허 :
65 |
초록
▼
Methods and apparatus are presented for conducting communications using a shared communication medium. A message is sent over the shared communication medium. The shared communication medium is organized to include an allocation of node identification signal space and an allocation of data transmiss
Methods and apparatus are presented for conducting communications using a shared communication medium. A message is sent over the shared communication medium. The shared communication medium is organized to include an allocation of node identification signal space and an allocation of data transmission signal space. The allocation of node identification signal space includes a plurality of node identification segments. The allocation of data transmission signal space includes a data transmission segment. The message includes a node identification portion and a data transmission portion. The node identification portion is transmitted in the allocation of node identification signal space and occupies a node identification segment. The data transmission portion is transmitted in the allocation of node identification signal space and occupies the data transmission segment.
대표청구항
▼
1. A method for conducting communications involving a plurality of access nodes using a shared communication medium, the method comprising: sending a message over the shared communication medium from a first access node in the plurality of access nodes, the shared communication medium organized to i
1. A method for conducting communications involving a plurality of access nodes using a shared communication medium, the method comprising: sending a message over the shared communication medium from a first access node in the plurality of access nodes, the shared communication medium organized to include an allocation of node identification signal space and an allocation of data transmission signal space, the allocation of node identification signal space including a plurality of contention-free node identification segments each having a different location within the allocation of node identification signal space, each of the plurality of access nodes being associated with a unique one of the plurality of contention-free node identification segments, the allocation of data transmission signal space including a data transmission segment, the data transmission segment available for data transmission from two or more of the plurality of access nodes, the message including a node identification portion and a data transmission portion;wherein the node identification portion is transmitted in the allocation of node identification signal space, and the node identification portion occupies a contention-free node identification segment that is one of the plurality of contention-free node identification segments;wherein the data transmission portion is transmitted in the allocation of data transmission signal space, and the data transmission portion occupies the data transmission segment;wherein a measure of occupancy of the shared communication medium is based on a number of occupied contention-free node identification segments detected in the allocation of node identification signal space; andwherein, depending on the measure of occupancy of the shared communication medium, the data transmission portion in the allocation of data transmission signal space is processed. 2. The method of claim 1 wherein the allocation of node identification signal space is organized according to a code division multiplexing (CDM) technique using a plurality of code words, and wherein the node identification portion is transmitted using a code word that is one of the plurality of code words. 3. The method of claim 1 wherein if one occupied contention-free node identification segment is detected in the allocation of node identification signal space, the data transmission portion in the allocation of data transmission signal space is processed. 4. The method of claim 1 wherein if two or more occupied contention-free node identification segments are detected in the allocation of node identification signal space, the data transmission portion in the allocation of data transmission signal space is not processed. 5. The method of claim 4 further comprising: receiving an assignment for re-transmission of the data transmission portion in an assigned data transmission segment in the allocation of data transmission signal space. 6. The method of claim 1 wherein each of the plurality of access nodes are associated with more than one unique contention-free node identification segment in the allocation of node identification signal space. 7. The method of claim 6 wherein a first contention-free node identification segment is located in time prior to the data transmission segment, and a second contention-free node identification segment is located in time after the data transmission segment. 8. The method of claim 1 wherein the node identification portion is a symbol-level identifier that supports transmission of more than two values per symbol. 9. The method of claim 8 wherein a first value is used to request an assigned data transmission segment in the allocation of data transmission signal space. 10. The method of claim 8 wherein a second value is used to send information. 11. The method of claim 1 wherein the allocation of data transmission signal space includes a plurality of data transmission segments. 12. The method of claim 11 wherein a first data transmission segment is different in size than a second data transmission segment. 13. A method for conducting communications involving a plurality of access nodes using a shared communication medium, the method comprising: receiving a message from a first access node in the plurality of access nodes over the shared communication medium, the shared communication medium organized to include an allocation of node identification signal space and an allocation of data transmission signal space, the allocation of node identification signal space including a plurality of contention-free node identification segments each having a different location within the allocation of node identification signal space, each of the plurality of access nodes being associated with a unique one of the plurality of contention-free node identification segments, the allocation of data transmission signal space including a data transmission segment, the data transmission segment available for data transmission from two or more of the plurality of access nodes, the message including a node identification portion and a data transmission portion;wherein the node identification portion is transmitted in the allocation of node identification signal space, and the node identification portion occupies a contention-free node identification segment that is one of the plurality of contention-free node identification segments;wherein the data transmission portion is transmitted in the allocation of data transmission signal space, and the data transmission portion occupies the data transmission segment;determining a measure of occupancy of the shared communication medium based on a number of occupied contention-free node identification segments detected in the allocation of node identification signal space; anddepending on the measure of occupancy of the shared communication medium, processing the data transmission portion in the allocation of data transmission signal space. 14. An apparatus for conducting communications involving a plurality of access nodes using a shared communication medium, comprising: a first access node in the plurality of access nodes configured to send a message over the shared communication medium, the shared communication medium organized to include an allocation of node identification signal space and an allocation of data transmission signal space, the allocation of node identification signal space including a plurality of contention-free node identification segments each having a different location within the allocation of node identification signal space, each of the plurality of access nodes being associated with a unique one of the plurality of contention-free node identification segments, the allocation of data transmission signal space including a data transmission segment, the data transmission segment available for data transmission from two or more of the plurality of access nodes, the message including a node identification portion and a data transmission portion;wherein the node identification portion is transmitted in the allocation of node identification signal space, and the node identification portion occupies a contention-free node identification segment that is one of the plurality of contention-free node identification segments;wherein the data transmission portion is transmitted in the allocation of data transmission signal space, and the data transmission portion occupies the data transmission segment;wherein a measure of occupancy of the shared communication medium is based on a number of occupied contention-free node identification segments detected in the allocation of node identification signal space; andwherein, depending on the measure of occupancy of the shared communication medium, the data transmission portion in the allocation of data transmission signal space is processed. 15. The apparatus of claim 14 wherein the allocation of node identification signal space is organized according to a code division multiplexing (CDM) technique using a plurality of code words, and wherein the node identification portion is transmitted using a code word that is one of the plurality of code words. 16. The apparatus of claim 14 wherein if one occupied contention-free node identification segment is detected in the allocation of node identification signal space, the data transmission portion in the allocation of data transmission signal space is processed. 17. The apparatus of claim 14 wherein if two or more occupied contention-free node identification segments are detected in the allocation of node identification signal space, the data transmission portion in the allocation of data transmission signal space is not processed. 18. The apparatus of claim 17 wherein the access node is configured to receive an assignment for re-transmission of the data transmission portion in an assigned data transmission segment in the allocation of data transmission signal space. 19. The apparatus of claim 14 wherein each of the plurality of access nodes are associated with more than one unique contention-free node identification segment in the allocation of node identification signal space. 20. The apparatus of claim 19 wherein a first contention-free node identification segment is located in time prior to the data transmission segment, and a second contention-free node identification segment is located in time after the data transmission segment. 21. The apparatus of claim 14 wherein the node identification portion is a symbol-level identifier that supports transmission of more than two values per symbol. 22. The apparatus of claim 21 wherein a first value is used to request an assigned data transmission segment in the allocation of data transmission signal space. 23. The apparatus of claim 21 wherein a second value is used to send information. 24. The apparatus of claim 14 wherein the allocation of data transmission signal space includes a plurality of data transmission segments. 25. The apparatus of claim 24 wherein a first data transmission segment is different in size than a second data transmission segment. 26. An apparatus for conducting communications using a shared communication medium involving a plurality of access nodes, comprising: a second access node configured to receive a message from a first access node over the shared communication medium, the shared communication medium organized to include an allocation of node identification signal space and an allocation of data transmission signal space, the allocation of node identification signal space including a plurality of contention-free node identification segments each having a different location within the allocation of node identification signal space, each of the plurality of access nodes being associated with a unique one of the plurality of contention-free node identification segments, the allocation of data transmission signal space including a data transmission segment, the data transmission segment available for data transmission from two or more of the plurality of access nodes, the message including a node identification portion and a data transmission portion;wherein the node identification portion is transmitted in the allocation of node identification signal space, and the node identification portion occupies a contention-free node identification segment that is one of the plurality of contention-free node identification segments;wherein the data transmission portion is transmitted in the allocation of data transmission signal space, and the data transmission portion occupies the data transmission segment;wherein the second node is configured to determine a measure of occupancy of the shared communication medium based on a number of occupied contention-free node identification segments detected in the allocation of node identification signal space; andwherein the second access node is configured to process the data transmission portion in the allocation of data transmission signal space depending on the measure of occupancy of the shared communication medium.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.