ES2584066T3 - Método y aparato para transmitir datos en un sistema MIMO - Google Patents
Método y aparato para transmitir datos en un sistema MIMO Download PDFInfo
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- ES2584066T3 ES2584066T3 ES11753656.5T ES11753656T ES2584066T3 ES 2584066 T3 ES2584066 T3 ES 2584066T3 ES 11753656 T ES11753656 T ES 11753656T ES 2584066 T3 ES2584066 T3 ES 2584066T3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0452—Multi-user MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
- H04B7/2656—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for structure of frame, burst
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0041—Arrangements at the transmitter end
- H04L1/0043—Realisations of complexity reduction techniques, e.g. use of look-up tables
- H04L1/0044—Realisations of complexity reduction techniques, e.g. use of look-up tables specially adapted for power saving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0052—Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables
- H04L1/0053—Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables specially adapted for power saving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0072—Error control for data other than payload data, e.g. control data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0075—Transmission of coding parameters to receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0083—Formatting with frames or packets; Protocol or part of protocol for error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/323—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the physical layer [OSI layer 1]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13215—Code checking, CRC
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
Abstract
Método para una red de área local inalámbrica que usa una transmisión de múltiple entrada múltiple salida de múltiples usuarios, MU-MIMO, comprendiendo el método, generar un campo de señales común para todos los usuarios que incluye información de duración de transmisión que indica una duración de una unidad de datos de protocolo de protocolo de convergencia de capa física, PPDU; generar una señal B de rendimiento muy alto dedicada para el usuario, VHT SIG-B, incluyendo el campo de señales información de longitud que indica una longitud de una unidad de datos de servicio de capa física, PSDU, e información acerca de un esquema de modulación y codificación, MCS; generar datos de VHT que incluyen un campo de servicio y la PSDU; y transmitir la PPDU que incluye el campo de señales común, el campo de VHT SIG-B y los datos de VHT a lo largo de un canal de operación, en el que el campo de servicio incluye información de aleatorizador y una comprobación de redundancia cíclica, CRC, calculándose la CRC a lo largo del campo de VHT SIG-B.
Description
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Qword analizando la A-MPDU, reduciendo la sobrecarga en comparación con la realización de la figura 11.
La figura 14 muestra una realización en la que se incluye únicamente la información de longitud de la PSDU en el campo de VHT-SIG B según la presente invención. En la realización de la figura 14, únicamente el campo de longitud de PSDU, el campo de CRC, y el campo de cola están incluidos en el campo de VHT-SIG B que tiene el tamaño de 26 bits. En la presente realización, la PSDU puede ser una A-MPDU que tiene una longitud en bytes o puede ser una (A-MPDU + relleno de Qword) que tiene una longitud en Qword. Además, en la presente realización, el campo de longitud de PSDU puede protegerse mediante el campo de CRC.
A continuación en el presente documento, se describirá un método para indicar el final de un marco usando el campo de duración de transmisión de L-SIG de la figura 4 y el esquema de relleno de MAC de la figura 6 con referencia a la figura 15. Además, se describirá también con referencia a la figura 15 un método de combinación de una indicación de longitud de cada usuario usando información de longitud que tiene el límite Qword descrito anteriormente en la realización de la figura 11.
La figura 15 muestra una realización en la que se representa información de longitud combinando un esquema de relleno de MAC y un esquema de indicación de longitud según la presente invención. Tal como se muestra en la figura 15, cuando se combinan los dos métodos, puede aplicarse un método de uso de un campo de cola y un método de uso de dos campos de cola.
En el caso en el que el número de campos de cola es uno tal como se muestra en el marco ilustrado en una parte inferior en la figura 15, el campo de DATOS DE VHT incluye servicio, PSDU, relleno de PHY, y relleno de cola en este orden. En este caso, la capa PHY realiza una copia usando la información de cola en la última posición, un decodificador de Viterbi tiene retraso de procesamiento hasta la última posición. Además, el decodificador no puede terminar de decodificar hasta que restaura datos mediante la longitud designada en el campo de longitud de VHT-SIG B. Los datos decodificados por la longitud designada en el campo de longitud de VHT-SIG B en la capa PHY se transfieren a la capa MAC, y la longitud del marco recibido tiene un tamaño de Límite máximo(A-MPDU_Length/4)*4 (En este caso, Límite máximo() se refiere a una función de Límite máximo). En este caso, la longitud de VHT-SIG B indica la longitud de la A-MPDU y el relleno de Qword incluidos en el formato de PSDU de la figura 6.
Cuando hay un campo de cola adicional tal como se muestra en el marco ilustrado en una parte superior en la figura 15, el campo de cola puede añadirse al límite Qword cuando el marco se decodifica usando el campo de longitud en el receptor, eliminando de ese modo el retraso en la longitud de copia en un decodificador BCC. Por tanto, la decodificación del decodificador puede terminarse más rápido. Cuando los datos se transfieren desde la capa PHY hasta la capa MAC, los datos pueden transferirse a la capa MAC tan rápido como la longitud o copia, y por consiguiente, la capa MAC puede tener una ganancia en cuanto al tiempo de procesamiento de marco.
Mientras tanto, cuando se transfiere un marco usando únicamente la duración de transmisión de L-SIG y la información de relleno de MAC sin usar la información de longitud de cada usuario, la PSDU que incluye relleno de MAC se transfiere totalmente a la capa MAC del receptor. Por tanto, la capa MAC realiza un análisis incluso en el relleno de MAC, generando sobrecarga.
En la realización de la figura 15, el transmisor configura la PSDU tal como sigue.
1) L_ampdu_x: longitud de A-MPDU de usuario x (unidades de byte)
2) L_psdu_x: A-MPDU de usuario x + longitud (unidades de byte) de PSDU que incluye relleno de MAC según la figura 6
3) Ndpbs_x: número de bits de datos por símbolo, valor (unidades de bit) de usuario x según MCS
4) Nsym: número de símbolos
5) L_padding_x: longitud (unidades de byte) (relleno de Qword, delimitador de cero) de relleno de MAC según esquema de relleno de MAC de la figura 6, relleno de MAC final
6) Nes: un número de codificadores BCC
7) n número de marcos de usuario
Mientras tanto, la capa MAC realiza el relleno de MAC de la figura 6 tal como sigue.
1) Nsym_x = Ceiling((16+8 3 L_ampdu_x + 6*Nes)/Ndpbs_x)
2) Nsym=max(Nsym_1, ..., Nsym_n)
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La figura 20 ilustra un formato de PPDU según otra realización de la presente invención.
El uso del campo de longitud de VHT-SIG B tal como se muestra en la figura 19 puede obtener un efecto de ahorro de energía en la capa PHY. Mientras tanto, el uso del formato de PPDU tal como se muestra en la figura 20 puede obtener un efecto de ahorro de energía incluso en la capa MAC.
En la figura 20, se usa un submarco de cero colocado en el extremo de la A-MPDU como un delimitador de relleno especial que tiene información de señalización de EOF. Cuando la capa MAC del receptor detecta el delimitador de cero de relleno que incluye la señalización EOF, la capa MAC transmite una señal de detención de operación a la capa PHY, obteniendo un efecto de ahorro de energía.
La figura 21 muestra la configuración de un terminal de transmisión según una realización de la presente invención.
Un terminal de transmisión 2102 incluye una unidad de generación de campo de datos 2104, una unidad de generación de campo de señales 2106, una unidad de generación de marco de datos 2108, y una unidad de transmisión 2110. La unidad de generación de campo de datos 2104 genera un campo de datos que incluye datos (por ejemplo, A-MPDU) que se desea que se transmitan a un terminal de recepción. En este caso, el campo de datos puede incluir un campo de servicio y un campo de unidad de datos de servicio PHY (PSDU), y el campo de PSDU puede incluir datos que se desea que se transmitan al terminal de recepción.
La unidad de generación de campo de datos 2104 puede generar un campo de PSDU tal como se describió anteriormente en la realización de la figura 15. La unidad de generación de campo de datos 2104 calcula en primer lugar el tamaño de un relleno de MAC que ha de añadirse después de los datos incluidos en la PSDU tal como sigue.
1) Nsym_x= Ceiling((16+8 x L_ampdu_x+6*Nes)/ Ndpbs_x)
2) Nsym=max(Nsym_1, ..., Nsym_n)
3) L_padding_x = round((Nsym 3 Ndpbs_x -16 -6*Nes)/8) -L_ampdu_x
Tras ello, la unidad de generación de campo de datos 2104 añade un relleno de Qword, un delimitador de cero, y un relleno de MAC final detrás de los datos según el tamaño del relleno de MAC tal como sigue.
If(Ceiling(L_ampdu_x/4))*4 <= (L_ampdu_x + L_padding_x)
Insert Qword pad
Else
Insert final MAC pad of L_padding_x byte and complete generation of PSDU
Cuando un espacio de relleno restante es mayor de o igual a 4 bytes, la unidad de generación de campo de datos 2104 inserta un delimitador de cero en unidades de 4 bytes. Además, cuando resta un espacio de 3 bytes o menor, la unidad de generación de campo de datos 2104 inserta un relleno de MAC final de byte y completa la generación de la PSDU.
La unidad de generación de campo de señales 2106 genera un campo de señales que incluye información con respecto al campo de datos generado mediante la unidad de generación de campo de datos 2104. En este caso, el campo de señales puede incluir un campo de longitud que designa el tamaño de los datos y el relleno de Qword incluido en el campo de PSDU. Además, el campo de señales puede incluir adicionalmente un campo de esquema de modulación y codificación (MCS) que incluye información con respecto a un método de modulación y codificación del campo de datos. Además, el campo de servicio puede incluir un bit de CRC calculado basándose en la información incluida en el campo de señales.
La unidad de generación de marco de datos 2108 genera un marco de datos que incluye el campo de datos y campo de señales generados. La unidad de transmisión 2110 transmite el marco de datos generado mediante la unidad de generación de marco de datos 2108 al terminal de recepción.
La figura 22 muestra la configuración de un terminal de recepción según una realización de la presente invención.
Un terminal de recepción 2202 incluye una unidad de recepción 2204, una unidad de decodificación 2206, y una unidad de obtención de datos 2208. La unidad de recepción 2204 recibe un marco de datos que incluye un campo de datos que incluye datos (por ejemplo, una A-MPDU) previstos para transmitirse mediante un terminal de transmisión y un campo de señales que incluye información con respecto al campo de datos desde el terminal de transmisión.
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Claims (1)
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Applications Claiming Priority (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20100021576 | 2010-03-11 | ||
KR20100021576 | 2010-03-11 | ||
KR20100022033 | 2010-03-12 | ||
KR20100022033 | 2010-03-12 | ||
KR20100063638 | 2010-07-01 | ||
KR20100063638 | 2010-07-01 | ||
KR20100066599 | 2010-07-09 | ||
KR20100066599 | 2010-07-09 | ||
KR20100066851 | 2010-07-12 | ||
KR20100066851 | 2010-07-12 | ||
KR20100068168 | 2010-07-14 | ||
KR20100068168 | 2010-07-14 | ||
PCT/KR2011/001740 WO2011112052A2 (ko) | 2010-03-11 | 2011-03-11 | Mimo 시스템에서 데이터를 송수신하는 방법 및 장치 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2584066T3 true ES2584066T3 (es) | 2016-09-23 |
Family
ID=44564031
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES11753656.5T Active ES2584066T3 (es) | 2010-03-11 | 2011-03-11 | Método y aparato para transmitir datos en un sistema MIMO |
ES16161385T Active ES2845643T3 (es) | 2010-03-11 | 2011-03-11 | Método y aparato de emisión y recepción de datos en un sistema MIMO |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES16161385T Active ES2845643T3 (es) | 2010-03-11 | 2011-03-11 | Método y aparato de emisión y recepción de datos en un sistema MIMO |
Country Status (13)
Country | Link |
---|---|
US (9) | US8422474B2 (es) |
EP (3) | EP3079269B1 (es) |
JP (4) | JP2013522949A (es) |
KR (1) | KR101202196B1 (es) |
CN (2) | CN107359915B (es) |
AU (1) | AU2011224959B2 (es) |
BR (1) | BR112012022751B1 (es) |
CA (1) | CA2792925C (es) |
DE (1) | DE112011100869T5 (es) |
ES (2) | ES2584066T3 (es) |
MX (1) | MX2012010523A (es) |
PL (1) | PL2547001T3 (es) |
WO (1) | WO2011112052A2 (es) |
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