Transmitting apparatus, receiving apparatus, and communication system for formatting data

• US 10,492,199 B2
• Filed: 07/14/2016
• Issued: 11/26/2019
• Est. Priority Date: 12/08/2000
• Status: Expired due to Term

• Current Assignee: Redwood Technologies, LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: Wi-Fi One, LLC (Inception Holdings, LLC)
• Inventors: Takahashi, Hiroaki, Suzuki, Mitsuhiro
• Primary Examiner(s): Wei, Siren
• Application Number:
  US15/210,741
• Publication Number:
  US 20170034816A1
• Time in Patent Office: 1,230 Days
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04J 3/00 Time-division multiplex systems H04J14/00 takes precedence; relay systems H04B7/14; selecting techniques H04Q
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/3405 Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames

Abstract

A transmitting apparatus, a receiving apparatus, and a communication system are provided that allow a reduction in a frame loss due to interference caused by use of the same channel. A transmitting apparatus disposed in a base station includes a GPS receiver for receiving a GPS signal, a timing generator for controlling respective function blocks in accordance with the GPS signal and an inter-base-station control signal so as to precisely synchronize the timing of frame transmission among base stations, the front-end transmission processing unit including for converting transmission information into transmission time slots, a frame generator for generating a frame including a plurality of time slots and one frame guard, and a back-end transmission processing unit for transmitting the generated frame as a radio signal.

Claims

1. A transmitting apparatus comprising circuitry configured to:

generate a transmission time slot based on transmission data;

generate a frame including;

a series of n (integer equal to or greater than

     1) time slots, each time slot of the series of n time slots including an effective symbol period, and at least one time slot of the series of n time slots further including a guard period; and

a frame guard period added to the series of n time slots to suppress a frame loss due to interference, wherein the length of the frame guard period is longer than a length of the guard period in the at least one time slot; and

transmit the generated frame as a radio signal.

2. The transmitting apparatus according to claim 1, wherein the guard period is set before the effective symbol period in the at least one time slot.

3. The transmitting apparatus according to claim 1, wherein a length of the effective symbol period in the at least one time slot is longer than a length of the guard period in the at least one time slot.

4. The transmitting apparatus according to claim 1, wherein the circuitry is further configured to modulate transmission information by a proper modulation scheme selected based on electric field strength information received from an external communication terminal.

5. The transmitting apparatus according to claim 1, further comprising at least one of:

a cellular communication mechanism, an interface for connecting to the Internet, a receiver configured to receive a GPS signal, or an antenna.

6. The transmitting apparatus according to claim 1, wherein the circuitry is further configured to generate a timing signal on a basis of a GPS signal and an inter-base-station control signal for achieving synchronization among base stations, thereby precisely synchronizing timing of frame transmission among the base stations.

7. A transmitting method comprising:

generating a transmission time slot based on transmission data;

generating a frame including;

a series of n (integer equal to or greater than

     1) time slots, each time slot of the series of n time slots including an effective symbol period, and at least one time slot of the series of n time slots further including a guard period; and

a frame guard period added to the series of n time slots to suppress a frame loss due to interference, wherein the length of the frame guard period is longer than a length of the guard period in the at least one time slot; and

transmitting the generated frame as a radio signal.

8. The transmitting method according to claim 7, wherein the guard period is set before the effective symbol period in the at least one time slot.

9. The transmitting method according to claim 7, wherein a length of the effective symbol period in the at least one time slot is longer than a length of the guard period in the at least one time slot.

10. The transmitting method according to claim 7, further comprising modulating transmission information by a proper modulation scheme selected based on electric field strength information received from an external communication terminal.

11. The transmitting method according to claim 7, wherein the transmitting is performed by at least one of:

a cellular communication mechanism, an interface for connecting to the Internet, a receiver configured to receive a GPS signal, or an antenna.

12. The transmitting method according to claim 7, further comprising generating a timing signal on a basis of a GPS signal and an inter-base-station control signal for achieving synchronization among base stations, thereby precisely synchronizing timing of frame transmission among the base stations.

13. A transmitting apparatus adapted to execute instructions that cause the transmitting apparatus to perform operations comprising:

generating a transmission time slot based on transmission data;

generating a frame including;

a series of n (integer equal to or greater than

     1) time slots, each time slot of the series of n time slots including an effective symbol period, and at least one time slot of the series of n time slots further including a guard period; and

a frame guard period added to the series of n time slots to suppress a frame loss due to interference, wherein the length of the frame guard period is longer than a length of the guard period in the at least one time slot; and

transmitting the generated frame as a radio signal.

14. The transmitting apparatus according to claim 13, wherein the guard period is set before the effective symbol period in the at least one time slot.

15. The transmitting apparatus according to claim 13, wherein a length of the effective symbol period in the at least one time slot is longer than a length of the guard period in the at least one time slot.

16. The transmitting apparatus according to claim 13, wherein execution of the instructions further cause the transmitting apparatus to perform operations comprising modulating transmission information by a proper modulation scheme selected based on electric field strength information received from an external communication terminal.

17. The transmitting apparatus according to claim 13, wherein execution of the instructions further cause the transmitting apparatus to perform operations comprising generating a timing signal on a basis of a GPS signal and an inter-base-station control signal for achieving synchronization among base stations, thereby precisely synchronizing timing of frame transmission among the base stations.