IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0978855
(2007-10-29)
|
등록번호 |
US-8208489
(2012-06-26)
|
우선권정보 |
KR-10-2006-0122022 (2006-12-05); KR-10-2007-0050778 (2007-05-25) |
발명자
/ 주소 |
- Hong, Seung Eun
- Kwon, Ho Jin
- Kwon, O Hyung
- Lee, Soo In
|
출원인 / 주소 |
- Electronics and Telecommunications Research Institute
|
대리인 / 주소 |
Blakely, Sokoloff, Taylor & Zafman
|
인용정보 |
피인용 횟수 :
24 인용 특허 :
4 |
초록
▼
Provided is a method by which a cable modem reports a downstream packet resequencing status to a cable modem termination system, and more particularly, a method of effectively reporting detailed information on a packet resequencing status by further defining a packet resequencing-related event and e
Provided is a method by which a cable modem reports a downstream packet resequencing status to a cable modem termination system, and more particularly, a method of effectively reporting detailed information on a packet resequencing status by further defining a packet resequencing-related event and event-related information in a message reporting the packet resequencing status. The method by which a cable modem reports a resequencing status of the resequenced packets includes the steps of: when a packet resequencing-related event occurs, generating a resequencing status message (CM-STATUS) including packet sequence numbers of packets causing the event; transmitting a band allocation request message for requesting a cable modem termination system to allocate an upstream band for transmission of the resequencing status message; and transmitting the resequencing status message to the cable modem termination system over the upstream band allocated by the band allocation request message. More detailed resequencing status information, such as the remaining capacity of the receive buffer and the resequenced packet map, for more packet resequencing-related events compared to the conventional downstream packet resequencing status reporting method, is transmitted to the CMTS, such that the CMTS copes more flexibly with situations that may occur upon packet resequencing.
대표청구항
▼
1. A method by which a cable modem receiving resequenced packets over a plurality of channels reports a resequencing status of the resequenced packets, the method comprising the steps of: (a) when a packet resequencing-related event occurs, generating a resequencing status message (CM-STATUS) in whi
1. A method by which a cable modem receiving resequenced packets over a plurality of channels reports a resequencing status of the resequenced packets, the method comprising the steps of: (a) when a packet resequencing-related event occurs, generating a resequencing status message (CM-STATUS) in which packet sequence numbers (PSN) of the resequenced packets causing the event are recorded on a field designated for the event, the resequencing status message including a sequence-out-of-range PSN list TLV, a rapid loss detection event PSN list TLV, and a timeout PSN list TLV, wherein the resequencing status message comprises a map of the resequenced packets stored in the cable modem, the map of the stored resequenced packets comprises at least one of a remaining window of a receive buffer of the cable modem, a next expected packet sequence number, an earliest packet sequence number of the stored resequenced packets, and a stored packet bitmap;(b) transmitting a band allocation request message for requesting a cable modem termination system to allocate an upstream band for transmission of the resequencing status message; and(c) transmitting the resequencing status message to the cable modem termination system over the upstream band allocated by the band allocation request message. 2. The method of claim 1, wherein the event comprises a rapid loss detection event. 3. The method of claim 1, wherein the event further comprises a resequencing packet timeout event occurring at a receive buffer of the cable modem. 4. A method by which a cable modem receiving resequenced packets over a plurality of channels reports a resequencing status of the resequenced packets, the method comprising the steps of: (a) generating a resequencing status message at the cable modem in a predetermined period, wherein the resequencing status message includes a map of the resequenced packets stored in the cable modem, the map of the resequenced packets includes a remaining window of a receive buffer of the cable modem, an earliest packet sequence number of the stored resequenced packets, a next expected packet sequence number and a stored packet bitmap;(b) allocating to the cable modem, by a cable modem termination system, an upstream band for transmission of the resequencing status message in the predetermined period; and(c) transmitting the resequencing status message to the cable modem termination system over the allocated upstream band. 5. The method of claim 4, wherein step (b) comprises allocating the upstream band using a service ID for periodic reporting. 6. A method by which a cable modem receiving resequenced packets over a plurality of channels reports a resequencing status of the resequenced packets, the method comprising the steps of: (a) receiving a request message (CM-CTRL-REQ) from a cable modem termination system, the request message requesting the cable modem to report the resequencing status, the request message comprising upstream band allocation information for transmission of a response message, the upstream band allocation information including an upstream channel ID (UCID), a band allocation start time, and a band allocation duration;(b) generating the response message (CM-CTRL-RSP) in response to the request message, wherein the response message comprises a map of the resequenced packets stored in the cable modem, wherein the map of the resequenced packets stored in the cable modem comprises a remaining window of a receive buffer of the cable modem, a next expected packet sequence number, an earliest packet sequence number of the stored resequenced packets, and a stored packet bitmap;(c) allocating to the cable modem, by the cable modem termination system, an upstream band for transmission of the response message; and(d) transmitting the response message to the cable modem termination system over the allocated upstream band. 7. The method of claim 6, wherein step (c) comprises allocating the upstream band by using the upstream band allocation information. 8. The method of claim 6, further comprising, before step (c), the step of transmitting a band allocation request message for requesting the cable modem termination system to allocate the upstream band for transmission of the response message.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.