Mobile communication system and repeater used in the mobile communication system

• US 6,804,491 B1
• Filed: 11/28/2000
• Issued: 10/12/2004
• Est. Priority Date: 03/31/1999
• Status: Expired due to Term

• Current Assignee: Optis Wireless Technology, LLC (Brevet Capital)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Uesugi, Mitsuru
• Primary Examiner(s): Gesesse, Tilahun
• Application Number:
  US09/701,337
• Time in Patent Office: 1,414 Days
• Field of Search: 455/7, 455/8, 455/9, 455/10, 455/11.1, 455/124, 455/113.1, 455/561, 455/562.1, 455/164, 455/272, 455/15, 375/211, 375/212, 376/274, 376/275, 376/246, 376/492, 376/347, 376/321, 376/315, 376/310
• US Class Current: 455/11.1
• CPC Class Codes: H01Q 1/242 specially adapted for hand-held use
• CPC Class Codes: H01Q 25/00 Antennas or antenna systems providing at least two radiating patterns arrangements for changing or varying the orientation or the shape of the directional pattern H01Q3/00
• CPC Class Codes: H01Q 3/26 varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture H01Q3/12, H01Q3/22, H01Q3/24 take precedence
• CPC Class Codes: H04B 7/15542 Selecting at relay station its transmit and receive resources selection of wireless resources by user or terminal H04W72/02; arrangements affording multiple use of the transmission path by two-dimensional division of the resources H04L5/0003, or by allocating sub-channels H04L5/003
• CPC Class Codes: H04B 7/1555 Selecting relay station antenna mode, e.g. selecting omnidirectional -, directional beams, selecting polarizations
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

When a base station 205 employs frequencies f1, f2 and f3, repeaters 201 to 204 provided with filters passing only f1 are placed. According to this configuration, repeater apparatus causes only f1 to be passed to reach in the distance so as to enlarge cells 207 to 210 according to only specific channel (frequency f1).

Claims

1. A mobile communication system comprising:

a first base station that uses a plurality of channels;

a second base station that uses the same plurality of channels used by the first base station;

a first repeater, located on an edge of a first cell formed by the first base station and communicating with said first base station, that lets pass and amplifies a first specific channel of the plurality of channels used by said first base station, so as to further form a first radio wave area, outside said first cell, to which the first repeater communicates using the first specific channel; and

a second repeater, located on an edge of a second cell formed by the second base station and communicating with said second base station, that lets pass and amplifies a second specific channel of the plurality of channels used by said second base station, so as to further form a second radio wave area, outside said second cell, to which the second repeater communicates using the second specific channel,

wherein the first and second specific channels differ from each other.

2. The mobile communication system according to claim 1, wherein the first cell and the second cell do not cross over each other.

3. The mobile communication system according to claim 1, wherein the first radio wave area and the second radio wave area partially cross over each other.

4. The mobile communication system according to claim 1, wherein the first repeater and the second repeater each change the respective first and second specific channels to pass and amplify in every predetermined time.

5. A repeater used in the mobile communication system of claim 1, comprising:

a receiving antenna having a directivity set in a direction of a base station;

a filter that lets pass a specific channel of a plurality of channels received by the receiving antenna;

an amplifier that amplifies the specific channel that passes through the filter; and

a transmitting antenna that transmits the specific channel amplified through the amplifier to outside a cell formed by the base station,

wherein the specific channel that the filter lets pass differs from a channel that a filter of another repeater located on an edge of a cell that adjoins the cell formed by the base station lets pass.