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Radio communication device and communication control method

專利號
US10098045B2
公開日期
2018-10-09
申請人
Panasonic Corporation（JP Osaka）
發(fā)明人
Hiroshi Takahashi; Naganori Shirakata
IPC分類
H04W36/00; H04B7/06; H04W36/38; H04W36/30
技術領域
radio,terminal,switch,device,candidate,sector,ssw,sharer,determiner,sls
地域： Osaka

摘要

The present disclosure provides a radio communication device including a communication processor that connects to at least one first radio terminal through radio communication using beam forming, an information sharer that acquires first connection information including a connection situation of one or more second radio terminals connected to a second radio communication device, a switch determiner that determines whether or not to switch a connection destination of the at least one first radio terminal from the radio communication device to the second radio communication device in reference to the first connection information, and a connection switcher that, when the switch determiner determines to switch the connection destination, switches the connection destination of the at least one first radio terminal from the radio communication device to the second radio communication device.

說明書

BACKGROUND

1. Technical Field

The present disclosure relates to a radio communication device that connects to a radio terminal as one of a plurality of access points to a communication network through radio communication using beam forming, and a communication control method.

2. Description of the Related Art

Millimeter wave communication, which requires no license and uses radio signals in the 60-GHz band while enabling high-speed communication, has been receiving attention in recent years.

Examples of major standards for wireless local area network (LAN) and wireless personal area network (PAN), which employ the millimeter wave communication, include Wireless Gigabit (WiGig), IEEE 802.15.3c, wireless high definition (WirelessHD), ECMA-387, and IEEE 802.11ad.

A millimeter wave band signal has radio-wave characteristics, which exhibit high linearity and large spatial attenuation. Thus, in many cases of the millimeter wave communication, which involves the above-described standards, beam forming techniques are used to control the directivity of the radio communication using a plurality of antennas.

Such beam forming techniques control the direction or width of a beam, which constitutes a communication area having directivity, and cause the beam to follow the position of a radio terminal, which is a communication partner. When a plurality of radio terminals are present in a range where a beam can be formed, which is hereinafter referred to as a “cell”, a millimeter wave communication device that uses the beam forming techniques connects to a plurality of radio terminals by switching the direction of the beam through time division.

權利要求

1
What is claimed is:1. A radio communication device comprising:a communication processor that connects to one or more first radio terminals through radio communication using beam forming;an information sharer that acquires first connection information on the number of one or more second radio terminals connected to a second radio communication device different from the radio communication device;a switch determiner that determines, based on the first connection information, whether or not to switch a connection destination of the one or more first radio terminals from the radio communication device to the second radio communication device; anda connection switcher that, when the switch determiner determines to switch the connection destination, switches the connection destination of the one or more first radio terminals from the radio communication device to the second radio communication device.2. The radio communication device according to claim 1, whereinwhen the switch determiner determines to switch the connection destination, the connection switcher causes the second radio communication device to perform a beam forming protocol for the one or more first radio terminals and, after the beam forming protocol succeeds, switches the connection destination of the one or more first radio terminals from the radio communication device to the second radio communication device.3. The radio communication device according to claim 1, whereinthe information sharer acquires second connection information on the number of the one or more first radio terminals connected to the radio communication device, andthe switch determiner determines, based on the second connection information, whether or not to switch the connection destination of the one or more first radio terminals from the radio communication device to the second radio communication device.4. The radio communication device according to claim 3, whereinthe first connection information indicates communication quality between the second radio communication device and the one or more second radio terminals, andthe second connection information indicates communication quality between the radio communication device and the one or more first radio terminals.5. The radio communication device according to claim 3, whereinthe second connection information further indicates communication quality between the radio communication device and the one or more first radio terminals, andthe switch determiner determines to switch the connection destination of one of the first radio terminals that is lowest in the communication quality of the one or more first radio terminals.6. The radio communication device according to claim 3, whereinthe information sharer transmits the second connection information to the second radio communication device.7. The radio communication device according to claim 1, whereinthe information sharer acquires third connection information on the number of one or more third radio terminals connected to a third radio communication device,the switch determiner determines, based on the first connection information and the third connection information, whether or not to switch the connection destination of the one or more first radio terminals from the radio communication device to the second radio communication device or the third radio communication device, andwhen the switch determiner determines to switch the connection destination, the connection switcher switches the connection destination of the one or more first radio terminals from the radio communication device to the second radio communication device or the third radio communication device.8. The radio communication device according to claim 7, whereinwhen the switch determiner determines to switch the connection destination and the number of the one or more second radio terminals is smaller than the number of the one or more third radio terminals, the switch determiner determines to switch the connection destination from the radio communication device to the second radio communication device, andwhen the switch determiner determines to switch the connection destination and the number of the one or more third radio terminals is smaller than the number of the one or more second radio terminals, the switch determiner determines to switch the connection destination from the radio communication device to the third radio communication device.9. A communication control method of a radio communication device that connects to one or more first radio terminals through radio communication using beam forming, the method comprising:acquiring first connection information on the number of one or more second radio terminals connected to a second radio communication device different from the radio communication device;determining, based on the first connection information, whether or not to switch a connection destination of the one or more first radio terminals from the radio communication device to the second radio communication device; andwhen determining to switch the connection destination, switching the connection destination of the one or more first radio terminals from the radio communication device to the second radio communication device.
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