Radio base system, channel allocation method and channel allocating program

• US 7,738,438 B2
• Filed: 01/21/2002
• Issued: 06/15/2010
• Est. Priority Date: 01/31/2001
• Status: Expired due to Fees

• Current Assignee: Godo Kaisha IP Bridge 1 (IP Bridge, Inc.)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Miyata, Takeo, Mori, Koichi, Nakao, Seigo
• Primary Examiner(s): Eng; George
• Assistant Examiner(s): Miller; Brandon J
• Application Number:
  US10/466,766
• Publication Number:
  US 20040072560A1
• Time in Patent Office: 3,067 Days
• Field of Search: 455/452.1, 455/452.2, 455/450, 455/561, 455/462.1, 455/63.1, 455/63.4, 370/345, 370/333, 370/337, 370/344, 370/329, 370/330, 370/442, 370/328, 370/319, 370/437
• US Class Current: 370/345
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A radio base system (1000) is multi-path-connected to a plurality of mobile terminal devices to transmit/receive signals. When a communication channel establishment request is sent from one of the plurality of mobile terminal devices, a control unit (80) detects the presence or absence of a mobile terminal device to which a communication channel is already connected for each of a plurality of slots. When channel allocation has to be performed by path multiplexing on the mobile terminal device which has sent the channel establishment request, control unit (80) permits channel establishment in accordance with a result of detection of an error detecting unit (56).

Claims

1. A radio base system multi-path connected to a plurality of mobile terminal devices via a plurality of paths being multiplexed to each of a plurality of slots being multiplexed in a time division manner, to transmit/receive signals, comprising:

signal adjusting unit for performing an adaptive array process for performing multi-path connection to said plurality of mobile terminal devices;

error detecting unit for detecting an error in a signal from the mobile terminal device connected to each of said plurality of slots; and

control unit for, when a communication channel establishment request is sent from one of said plurality of mobile terminal devices, selecting one of said plurality of slots to determine if there is a mobile terminal device to which a communication channel is already connected for said for selected slot, allocating a channel to said one mobile terminal device if there is no mobile terminal device to which a communication channel is already connected for said selected slot, determining if multi-path connection is appropriate for said one mobile terminal device when there is a mobile terminal device to which a communication channel is already connected, permitting, when it is determined that multi-path connection is possible, channel establishment in accordance with a result of detection of said error detecting unit, and selecting, when it is determined that multi path connection is impossible, a subsequent slot sequentially.

2. The radio base system according to claim 1, wherein

said signal includes a code for error detection, and

said error detecting unit detects an error in said signal on the basis of said error detection code.

3. The radio base system according to claim 1, wherein

said signal includes a reference signal used by said signal adjusting unit to perform said adaptive array process, and

said error detecting unit detects an error in said signal on the basis of a detection error of said reference signal.

4. The radio base system according to claim 2, wherein

said signal includes a plurality of frames each having a predetermined number of said slots, and

said error detecting unit detects an error in said signal on the basis of the number of errors based on said error detection code per said frame.

5. The radio base system according to claim 1, wherein the radio base system multi-path connects to the plurality of mobile terminal devices by spatially dividing the same time slot of the same frequency.

6. A channel allocating method in a radio base system multi-path connected to a plurality of mobile terminal devices via a plurality of paths being multiplexed to each of a plurality of slots being multiplexed in a time division manner, to transmit/receive signals, the method comprising the steps of:

detecting an error in a signal from the mobile terminal device connected to each of said plurality of slots;

when a communication channel establishment request is sent from one of said plurality of mobile terminal devices, selecting one of said plurality of slots to determine if there is a mobile terminal device to which a communication channel is already connected for said selected slot; and

allocating a channel to said one mobile terminal device if there is no mobile terminal device to which a communication channel is already connected for said selected slot, determining if multi path connection is appropriate for said one mobile terminal device when there is a mobile terminal device to which a communication channel is already connected, permitting, when it is determined that multi-path connection is possible, channel establishment in accordance with said detected error, and selecting, when it is determined that multi-path connection is impossible, a subsequent slot sequentially,

wherein the multi-path connection is performed by an adaptive array process.

7. The channel allocating method according to claim 6, wherein

said signal includes a code for error detection, and

said error detecting step includes the step of detecting an error in said signal on the basis of said error detection code.

8. The channel allocating method according to claim 6, wherein

said signal includes a reference signal used to perform an adaptive process for performing said path multiplexing connection to said plurality of mobile terminal devices, and

said error detecting step includes the step of detecting an error in said signal on the basis of a detection error of said reference signal.

9. The channel allocating method according to claim 7, wherein

said signal includes a plurality of frames each having a predetermined number of said slots, and

said error detecting step includes the step of detecting an error in said signal on the basis of the number of errors based on said error detection code per said frame.

10. The channel allocating method according to claim 6, wherein the radio base system multi-path connects to the plurality of mobile terminal devices by spatially dividing the same time slot of the same frequency.