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1. (WO2017150033) COMMUNICATION SYSTEM AND SMALL CELL BASE STATION
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Pub. No.: WO/2017/150033 International Application No.: PCT/JP2017/003119
Publication Date: 08.09.2017 International Filing Date: 30.01.2017
IPC:
H04W 56/00 (2009.01) ,H04W 16/28 (2009.01) ,H04W 16/32 (2009.01) ,H04W 28/16 (2009.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
W
WIRELESS COMMUNICATION NETWORKS
56
Synchronisation arrangements
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
W
WIRELESS COMMUNICATION NETWORKS
16
Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cell structures
24
Cell structures
28
using beam steering
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
W
WIRELESS COMMUNICATION NETWORKS
16
Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cell structures
24
Cell structures
32
Hierarchical cell structures
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
W
WIRELESS COMMUNICATION NETWORKS
28
Network traffic or resource management
16
Central resource management; Negotiation of resources, e.g. negotiating bandwidth or QoS [Quality of Service]
Applicants:
ソフトバンク株式会社 SOFTBANK CORP. [JP/JP]; 東京都港区東新橋一丁目9番1号 9-1, Higashi-shimbashi 1-chome, Minato-ku, Tokyo 1057317, JP
Inventors:
塩原 翔太 SHIOBARA Shota; JP
岡廻 隆生 OKAMAWARI Takao; JP
藤井 輝也 FUJII Teruya; JP
Agent:
黒田 壽 KURODA Hisashi; JP
中村 弘通 NAKAMURA Hiromichi; JP
Priority Data:
2016-03715729.02.2016JP
Title (EN) COMMUNICATION SYSTEM AND SMALL CELL BASE STATION
(FR) SYSTÈME DE COMMUNICATION ET STATION DE BASE DE PETITE CELLULE
(JA) 通信システム及びスモールセル基地局
Abstract:
(EN) The present invention allows a difference between times at which downlink signals synchronously transmitted from a macro cell base station and a small cell base station, respectively, arrive at a communication terminal device to fall within a permissible range without being affected by a transmission delay in transmission cables or a propagation delay in wireless transmission paths of the base stations. A small cell base station is provided with a wireless transmission/reception unit that is connected to an antenna, a wireless communication control unit, a transmission cable that connects the wireless transmission/reception unit and the wireless communication control unit, and a downlink signal reception unit that receives downlink signals transmitted from the macro cell base station and the small cell base station, respectively. The small cell base station measures a reception timing difference between the downlink signals transmitted from the macro cell base station and the small cell base station itself, respectively, on the basis of the reception result of the downlink signals, adjusts the transmission timing of the downlink signal from the station itself on the basis of the reception timing difference, and transmits the downlink signal at the adjusted transmission timing.
(FR) La présente invention permet qu'une différence entre les instants auxquels des signaux de liaison descendante transmis de façon synchronisée depuis une station de base de macrocellule et une station de base de petite cellule, respectivement, arrivent à un dispositif terminal de communication soit dans une plage autorisée sans être affectée par un retard de transmission dans des câbles de transmission ou un retard de propagation dans des trajets de transmission sans fil des stations de base. Une station de base de petite cellule comprend une unité de transmission/réception sans fil qui est connectée à une antenne, une unité de commande de communication sans fil, un câble de transmission qui connecte l'unité de transmission/réception sans fil et l'unité de commande de communication sans fil, et une unité de réception de signal de liaison descendante qui reçoit des signaux de liaison descendante transmis respectivement depuis la station de base de macrocellule et la station de base de petite cellule. La station de base de petite cellule mesure une différence de synchronisation de réception entre les signaux de liaison descendante transmis respectivement depuis la station de base de macrocellule et la station de base de petite cellule elle-même, en fonction du résultat de réception des signaux de liaison descendante, adapte la synchronisation de transmission du signal de liaison descendante de la station elle-même en fonction de la différence de synchronisation de réception, et transmet le signal de liaison descendante selon la synchronisation de transmission adaptée.
(JA) 基地局の伝送ケーブルにおける伝送遅延や無線伝送路における伝搬遅延の影響を受けることなく、マクロセル基地局及びスモールセル基地局それぞれから同期送信された下りリンク信号が通信端末装置に到達する時間のずれを許容範囲内にする。スモールセル基地局は、アンテナに接続された無線送受信部と、無線通信制御部と、無線送受信部と無線通信制御部とを接続する伝送ケーブルと、マクロセル基地局及び自局それぞれから送信された下りリンク信号を受信する下りリンク信号受信部とを備える。スモールセル基地局は、前記下りリンク信号の受信結果に基づいて、マクロセル基地局及び自局それぞれから送信された下りリンク信号の受信タイミング差を測定し、受信タイミング差に基づいて、自局の下りリンク信号の送信タイミングを調整し、調整された送信タイミングで下りリンク信号を送信する。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)