Base station, terminal, band allocation method, and downlink...

Details Base station, terminal, band allocation method, and downlink... Base station, terminal, band allocation method, and downlink...

H - Electricity

04

W

H04W 8/22 (2009.01) H04W 72/04 (2009.01) H04J 1/00 (2006.01) H04J 11/00 (2006.01)

Patent

CA 2727066

Provided are a base station, a terminal, a band allocation method, and a downlink data communication method in which a mapping method for synchronization signals and report signals is implemented with high resource usage efficiency when a first system in which an independent single communication is allocated to a unit band co-exists with a second system in which a plurality of unit bands can be allocated to a single communication. In a base station (200), an OFDM signal generation unit (225) maps primary synchronization channel (P-SCH), secondary synchronization channel (S-SCH), primary broadcast channel (P-BCH), and dynamic broadcast channel (D-BCH), which can be decoded by both an LTE terminal and an LTE+ terminal, to some of a plurality of unit bands available to the station itself. The OFDM signal generation unit (225) also maps D-BCH+, which can be decoded only by an LTE+ terminal, to all of the plurality of unit bands to produce a multiplexed transmission signal. When the terminal which has transmitted terminal capability information is an LTE+ terminal, a control unit (265) transmits a band movement indication which indicates changes in the reception band to that terminal.

Cette invention propose une station de base, un terminal, un procédé d'attribution de bande et un procédé de communication de données de liaison descendante permettant, avec une utilisation efficiente des ressources, de mettre en oevre un procédé de mappage des signaux synchrones et des signaux de rapport, lorsqu'un premier système, attribuant à chaque bande unitaire une communication unique, cohabite avec un second système, capable d'attribuer à chaque communication unique plusieurs bandes unitaires. Dans la station de base (200), l'unité génératrice du signal OFDM (225) effectue d'une part le mappage du canal de synchronisation primaire (P-SCH), du canal de synchronisation secondaire (S-SCH), du canal de diffusion primaire (P-BCH) et du canal de diffusion dynamique (D-BCH), tous quatre décodables par le terminal LTE et par le terminal LTE+, sous la forme d'un élément de bande unitaire, parmi les multiples bandes unitaires de la station de base; elle effectue d'autre part le mappage du canal de diffusion dynamique (D-BCH+), décodable uniquement par le terminal LTE+, sous la forme de l'ensemble des multiples bandes unitaires, générant ainsi un signal multiplex de transmission. Ensuite, lorsque le terminal d'émission des informations de capacité du terminal est un terminal LTE+, l'unité de contrôle (265) envoie à ce terminal les commandes de saut de fréquence instruisant de changer de bande de réception.

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