KR100647745B1 - 대역폭 할당을 위한 방법 및 장치 - Google Patents
대역폭 할당을 위한 방법 및 장치 Download PDFInfo
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Abstract
Description
도 13은 본 발명에 의해 사용된 업링크 대역폭 할당 방법을 도시한 도면.
Claims (29)
- 광대역 무선 통신 시스템내에 대역폭을 할당하는 방법 - 상기 무선 통신 시스템은 관련된 해당 기지국과 통신하는 복수개의 고객 현장 장비(customer premise equipment; CPE)를 포함하며, 상기 기지국은 업링크 및 다운링크 통신 경로내에 대역폭 할당을 표시하는 업링크 및 다운링크 서브프레임 맵을 유지함 - 에 있어서,(a) 선택된 CPE를 개별적으로 폴링(polling)하기에 충분한 이용가능한 대역폭이 있는지를 결정하는 단계;(b) 만약 단계 (a)에서 충분한 대역폭이 이용가능한 것으로 결정되면, 폴링되지 않고 존재하는 비활성 CPE 혹은 폴링하도록 요구하는 폴링되지 않은 활성 CPE가 있는지를 결정하며, 그렇지 않다면 단계 (e)로 진행하는 단계;(c) 상기 CPE에 대한 대역폭을 상기 업링크 서브프레임 맵내에 할당함으로써 선택된 CPE를 폴링하는 단계;(d) 상기 단계 (a)에서 CPE를 개별적으로 폴링하기에 충분하지 않은 이용가능한 대역폭이 있는 것으로 결정될 때까지 단계 (a) 내지 (c)를 반복함으로써 기타 선택된 CPE를 개별적으로 계속 폴링하는 단계;(e) 멀티캐스트 및 브로드캐스트 폴링 프로세스를 개시하는 단계;(f) 임의의 개별 CPE 폴(poll)이 단계 (c)에서 개시되었는지를 결정하는 단계;(g) 단계 (c)에서 어떠한 개별 CPE 폴도 개시되지 않았다면, 본 방법을 종료하며, 그렇지 않다면 단계 (c)에서 폴링된 CPE로부터 개별적인 대역폭 요청을 대기하는 단계;(h) 선택된 CPE로부터 대역폭 요청을 수신하는 단계: 및(i) 대역폭 할당 프로세스를 개시하고 단계 (h)에서 수신된 대역폭 요청을 전송한 선택된 CPE에 대하여 상기 업링크 서브프레임 맵 내에 대역폭을 할당하는 단계를 포함하는 대역폭 할당 방법.
- 제1항에 있어서, 상기 폴링되지 않은 활성 CPE는 상기 CPE와 관련된 폴-미 비트(poll-me bit)를 설정함으로써 단계 (b)에서 폴링을 요청하는 것을 특징으로 하는 대역폭 할당 방법.
- 제1항에 있어서, 상기 다운링크 서브프레임 맵은 프레임 제어 헤더 및 변조 타입에 의해 그룹화된 복수개의 다운링크 데이터 물리적 슬롯(physical slot; PS)을 포함하며, 상기 복수개의 데이터 물리적 슬롯(PS)는 복수개의 변조 전이 갭(modulation transition gap)에 의해 분리되는 것을 특징으로 하는 대역폭 할당 방법.
- 제3항에 있어서, 상기 프레임 제어 헤더는 프리앰블(preamble), 물리적 제어부 및 미디어 액세스 제어(MAC)부를 포함하는 것을 특징으로 하는 대역폭 할당 방법.
- 제1항에 있어서, 상기 업링크 서브프레임 맵은 복수개의 등록 경쟁 슬롯(registration contention slots), 복수개의 대역폭 요청 경쟁 슬롯 및 복수개의 CPE 스케줄링 데이터 슬롯(CPE scheduled data slots)을 포함하며, 상기 등록 경쟁 슬롯, 대역폭 요청 경쟁 슬롯 및 데이터 슬롯은 상기 복수개의 CPE와 관련되고 해당하는 것을 특징으로 하는 대역폭 할당 방법.
- 제5항에 있어서, 상기 등록 경쟁 슬롯은 관련된 해당 기지국에 등록하는 동안 CPE에 의해 사용되며, 상기 대역폭 요청 경쟁 슬롯은 CPE에 의해 대역폭을 요청하도록 전송하는데 사용되는 것을 특징으로 하는 대역폭 할당 방법.
- 제5항에 있어서, 상기 CPE 스케줄링 데이터 슬롯은 MAC 제어 메세지 및 데이터를 관련된 해당 기지국들로 전송하기 위해 CPE에 의해 사용되는 것을 특징으로 하는 대역폭 할당 방법.
- 제3항에 있어서, 상기 기지국은 프레임 제어 헤더를 브로드캐스팅함으로써 단계 (c) 동안 폴링되는 상기 선택된 CPE를 알리며, 상기 프레임 제어 헤더는 대역폭 요청에 응답할 목적으로 상기 선택된 CPE에 대해 대역폭이 할당되었음을 지시하는 MAC 제어부를 포함하는 것을 특징으로 하는 대역폭 할당 방법.
- 제7항에 있어서, 상기 개별 대역폭 요청은 대역폭 요청 메세지에 대하여 스케줄링 CPE 데이터 슬롯을 모니터링함으로써 단계 (h) 동안 수신되는 것을 특징으로 하는 대역폭 할당 방법.
- 제1항에 있어서, 단계 (e) 동안 개시된 멀티캐스트 및 브로드캐스트 폴링 프로세스는,(a) 멀티캐스트 폴을 수행하는데 사용가능한 충분한 대역폭이 있는지를 결정하는 단계;(b) 단계 (a)에서 충분한 대역폭이 사용가능한 것으로 결정되면, 폴링되어야 할 다음번 멀티캐스트 그룹을 폴링하고 단계 (a)로 리턴하며, 그렇지 않다면 단계 (c)로 진행하는 단계;(c) 브로드캐스트 폴을 수행하는데 사용가능한 충분한 대역폭이 있는지를 결정하는 단계:(d) 단계 (c)에서 충분한 대역폭이 사용가능한 것으로 결정되면, 상기 업링크 서브프레임 맵 내에 브로드캐스트 폴을 배치하며, 그렇지 않다면 단계 (e)로 진행하는 단계;(e) 단계 (b) 또는 (d)에서 멀티캐스트 또는 브로드캐스트 폴이 수행되었는지를 결정하는 단계:(f) 단계 (e) 동안 멀티캐스트 또는 브로드캐스트 폴이 수행되어야 할 것으로 결정되면, 상기 업링크 서브프레임 맵에 의해 정의된 대역폭 요청 경쟁 슬롯 내의 대역폭 요청 메세지를 모니터링하며, 그렇지 않다면 멀티캐스트 및 브로트캐스트 폴링 프로세스를 종료하는 단계;(g) 유효한 대역폭 요청이 수신되었는지를 결정하는 단계; 및(h) 상기 복수개의 CPE에 할당된 대역폭을 반영하도록 상기 업링크 서브프레임 맵을 수정하는 단계를 포함하는 것을 특징으로 하는 대역폭 할당 방법.
- 제1항에 있어서, 단계 (i)에서 개시된 대역폭 할당 프로세스는 상기 복수개의 CPE내의 복수개의 데이터 대기행렬(data queue)의 논리적 모델을 생성하여 유지하는 단계를 포함하며, 상기 데이터 대기행렬은 서비스 품질 지정(quality of service designations)에 기초하여 정렬되는 것을 특징으로 하는 대역폭 할당 방법.
- 제11항에 있어서, 데이터는 서비스 품질의 대기행렬 우선순위대로 CPE에 의해 전송되는 것을 특징으로 하는 대역폭 할당 방법.
- 제12항에 있어서, 상기 서비스 품질의 대기행렬 내의 모든 데이터를 전송하기에 충분하지 않은 대역폭이 있을 때마다 개시되는 서비스 품질 특정 균등 방법(a quality of service specific fairness method)을 포함하는 것을 특징으로 하는 대역폭 할당 방법.
- 제13항에 있어서, 상기 논리적 모델은,(a) 복수개의 연속 허여 데이터 대기행렬(continuous grant data queue);(b) 복수개의 적절하게 가중된 데이터 대기행렬; 및(c) 복수개의 라운드 로빈(round robin) 방식 데이터 대기행렬을 포함하는 것을 특징으로 하는 대역폭 할당 방법.
- 제14항에 있어서, 상기 연속 허여 데이터 대기행렬 내의 데이터는 업링크 프레임 동안 전송되는 것을 특징으로 하는 대역폭 할당 방법.
- 제14항에 있어서, 적절하게 가중된 데이터 대기행렬 내의 데이터에는 소정의 가중치가 할당되며, 상기 가중치는 상기 데이터가 수신하기에 적당한 대역폭의 퍼센티지(%)를 나타내는 것을 특징으로 하는 대역폭 할당 방법.
- 제16항에 있어서, 상기 가중치는 현존하는 데이터, 보장 속도(guaranteed rate) 혹은 평균 속도 가중치 중 어느 하나를 포함하는 것을 특징으로 하는 대역폭 할당 방법.
- 제14항에 있어서, 상기 라운드 로빈 방식 데이터 대기행렬은 모든 접속이 동일한 가중치를 갖는 가장 효과적인 접속에 대해 사용되는 것을 특징으로 하는 대역폭 할당 방법.
- 제18항에 있어서, 상기 접속은, 각 접속이 소정의 최대값까지 대역폭의 블록을 수신하는 라운드-로빈 방식으로 대역폭이 할당되는 것을 특징으로 하는 대역폭 할당 방법.
- 제1항에 있어서, 단계 (h) 동안 수신된 상기 대역폭 요청은 피기백 기술(piggybacking technique)을 사용하여 상기 선택된 CPE에 의해 전송되며, 이에 의해 상기 선택된 CPE는 현존하는 대역폭 할당의 TC/PHY 패킷 내에서 사용되지 않는 대역폭을 사용하여 상기 대역폭 요청을 전송하는 것을 특징으로 하는 대역폭 할당 방법.
- 광대역 무선 통신 시스템내에 대역폭을 할당하는 장치 - 상기 무선 통신 시스템은 관련된 해당 기지국과 통신하는 복수개의 고객 현장 설비(CPE)를 포함하며, 상기 기지국은 업링크 및 다운링크 통신 경로 내의 대역폭 할당을 표시하는 업링크 및 다운링크 서브프레임 맵 대표를 유지함 - 에 있어서,(a) 선택된 CPE를 개별적으로 폴링하기 위한 수단 - 상기 수단은 상기 업링크 서브프레임 맵 내에 상기 선택된 CPE에 대한 대역폭을 할당하기 위한 수단을 포함하고, 임의의 CPE가 관련된 해당 폴-미 비트를 설정함으로써 송신을 요청하는지를 결정하기 위한 수단을 더 포함함 -;(b) 선택된 CPE 그룹을 폴링하기 위한 수단 - 상기 수단은 상기 CPE를 개별적으로 폴링하기에 불충분한 대역폭이 있는 경우에만 발동됨 -;(c) 상기 폴링 수단에 동작적으로 결합되어, 임의의 CPE가 폴링되었는지를 결정하기 위한 결정 수단;(d) 선택된 CPE로부터 대역폭 요청을 수신하기 위한 수신 수단; 및(e) 관련된 해당 기지국에 대역폭 요청을 전송하는 선택된 CPE에 대해 상기 업링크 서브프레임 맵 내에 대역폭을 할당하기 위한 대역폭 할당 수단을 포함하는 대역폭 할당 장치.
- 광대역 무선 통신 시스템내에 대역폭을 할당하는 장치 - 상기 무선 통신 시스템은 관련된 해당 기지국과 통신하는 복수개의 고객 현장 설비(CPE)를 포함하며, 상기 기지국은 업링크 및 다운링크 통신 경로 내의 대역폭 할당을 표시하는 업링크 및 다운링크 서브프레임 맵 대표를 유지함 - 에 있어서,(a) 선택된 CPE를 개별적으로 폴링하기 위한 개별 폴링 수단;(b) 선택된 CPE 그룹을 폴링하기 위한 수단 - 상기 수단은 상기 CPE를 개별적으로 폴링하기에 불충분한 대역폭이 있는 경우에만 발동됨 -;(c) 선택된 CPE에 관련된 폴-미 비트를 설정함으로써 폴링을 개시하기 위한 수단;(d) 선택된 CPE에 대하여 할당된 대역폭을 사용하여 선택된 기지국으로 대역폭 요청을 전송하기 위한 피기백 수단; 및(e) 관련된 해당 기지국으로 대역폭 요청을 전송하는 선택된 CPE에 대해 상기 업링크 서브-프레임 맵 내에 대역폭을 할당하기 위한 수단 - 상기 개별 폴링 수단, 상기 그룹 폴링 수단, 폴을 개시하기 위한 상기 수단 및 상기 피기백 수단은 선택된 CPE에 대해 대역폭을 효율적으로 요청하는데 사용됨 -을 포함하는 대역폭 할당 장치.
- 제22항에 있어서, 상기 다운링크 서브프레임 맵은 변조 타입에 의해 그룹화된 프레임 제어 헤더 및 복수개의 다운링크 데이터 물리적 슬롯(PS)를 포함하며, 상기 복수개의 데이터 물리적 슬롯(PS)는 복수개의 변조 전이 갭에 의해 분리되는 것을 특징으로 하는 대역폭 할당 장치.
- 제23항에 있어서, 상기 프레임 제어 헤더는 프리앰블, 물리적 제어부 및 미디어 액세스 제어(MAC)부를 포함하는 것을 특징으로 하는 대역폭 할당 장치.
- 제24항에 있어서, 상기 업링크 서브프레임 맵은 복수개의 등록 경쟁 슬롯, 복수개의 대역폭 요청 경쟁 슬롯 및 복수개의 CPE 스케줄링 데이터 슬롯을 포함하며, 상기 등록 경쟁 슬롯, 대역폭 요청 경쟁 슬롯 및 데이터 슬롯은 상기 복수개의 CPE에 관련되는 것을 특징으로 하는 대역폭 할당 장치.
- 제25항에 있어서, 상기 등록 경쟁 슬롯은 관련된 해당 기지국으로 등록 동안 상기 CPE에 의해 사용되며, 상기 대역폭 요청 경쟁 슬롯은 대역폭을 요청하도록 상기 CPE들에 의해 전송되는데 사용되는 것을 특징으로 하는 대역폭 할당 장치.
- 제23항에 있어서, 상기 기지국은 프레임 제어 헤더를 브로드캐스팅함으로써 단계 (c) 동안 폴링되는 상기 선택된 CPE를 알리며, 상기 프레임 제어 헤더는 대역폭 요청에 응답할 목적으로 상기 선택된 CPE에 대역폭이 할당되었다는 것을 지시하는 MAC 제어부를 포함하는 것을 특징으로 하는 대역폭 할당 장치.
- 광대역 무선 통신 시스템내에 대역폭을 할당하는 방법 - 상기 무선 통신 시스템은 관련된 해당 기지국과 통신하는 복수개의 고객 현장 장비(customer premise equipment; CPE)를 포함하며, 상기 기지국은 업링크 및 다운링크 통신 경로내에 대역폭 할당을 표시하는 업링크 및 다운링크 서브프레임 맵을 유지함 - 에 있어서,(a) CPE들을 개별적으로 폴링하기에 불충분한 대역폭이 있는 경우에만 선택된 CPE 그룹을 폴링하는 단계;(b) 선택된 CPE를 개별적으로 폴링하고, 상기 업링크 서브프레임 맵 내에 상기 선택된 CPE에 대해 대역폭을 할당하여 임의의 CPE가 관련된 해당 폴-미 비트를 설정함으로써 폴링을 요청하는지를 결정하는 단계;(c) 임의의 CPE가 폴링되었는지를 결정하는 단계;(d) 선택된 CPE들로부터 대역폭 요청을 수신하는 단계; 및(e) 상기 업링크 서브프레임 맵 내에 관련된 해당 기지국에 대역폭 요청을 전송하는 선택된 CPE에 대해 대역폭을 할당하는 단계를 포함하는 대역폭 할당 방법.
- 광대역 무선 통신 시스템내에 대역폭을 할당하는 방법 - 상기 무선 통신 시스템은 관련된 해당 기지국과 통신하는 복수개의 고객 현장 장비(customer premise equipment; CPE)를 포함하며, 상기 기지국은 업링크 및 다운링크 통신 경로내에 대역폭 할당을 표시하는 업링크 및 다운링크 서브프레임 맵을 유지함 - 에 있어서,(a) CPE들을 개별적으로 폴링하기에 불충분한 대역폭이 있는 경우에만 선택된 CPE 그룹을 폴링하는 단계;(b) 선택된 CPE를 개별적으로 폴링하는 단계;(c) 선택된 CPE와 관련된 폴-미 비트를 설정함으로써 폴링을 개시하는 단계;(d) 선택된 CPE에 할당된 대역폭을 사용하여 선택된 기지국에 대역폭 요청을 전송하는 단계; 및(e) 관련된 해당 기지국에 대역폭 요청을 전송하는 선택된 CPE에 대해 상기 업링크 서브프레임 맵 내에 대역폭을 할당함으로써 선택된 CPE에 대한 대역폭을 효율적으로 요청하는 단계를 포함하여 이루어지는 대역폭 할당 방법.
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