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

• US 9,413,452 B2
• Filed: 09/20/2013
• Issued: 08/09/2016
• Est. Priority Date: 12/08/2000
• Status: Expired due to Term

• Current Assignee: Redwood Technologies, LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Takahashi, Hiroaki, Suzuki, Mitsuhiro
• Primary Examiner(s): GESESSE, TILAHUN
• Application Number:
  US14/032,403
• Publication Number:
  US 20140086357A1
• Time in Patent Office: 1,054 Days
• Field of Search: 370/230, 455/73
• US Class Current: 1/1
• 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 in an orthogonal frequency division multiplexing (OFDM) wireless communication system, comprising;

a transmission processing unit configured to transmit at least one transmission OFDM signal in a transmission time slot among a series of transmission time slots, each transmission time slot including a guard interval;

wherein the at least one transmission OFDM signal includes a frame guard, the frame guard including no signal and having a length less than a length of the series of transmission time slots, the frame guard following after the series of transmission time slots, and

wherein the length of the frame guard is longer than a length of a guard interval.

2. The transmitting apparatus according to claim 1, wherein the guard interval is set before an effective symbol period in a transmission time slot.

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

4. The transmitting apparatus according to claim 1, wherein a transmission processing unit includes a modulator for modulating transmission information by a proper modulation scheme selected on a basis of electric field strength information received from a communication terminal to which the transmission signal is transmitted.

5. The transmitting apparatus according to claim 1, wherein the transmission processing unit generates a time slot by adding a predetermined guard interval to an effective symbol period.

6. The transmitting apparatus according to claim 1, wherein the transmitting apparatus further comprising at least one of a cellular communication mechanism, an interface for connecting an internet, a receiver configured to receive GPS signal and an antenna.

7. The transmitting apparatus according to claim 1, further comprising a timing generator for 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.

8. A transmitting device in an orthogonal frequency division multiplexing (OFDM) wireless communication system, comprising:

circuitry configured to;

provide at least one transmission OFDM signal in a transmission time slot among a series of transmission time slots, each transmission time slot including a guard interval;

wherein the at least one transmission OFDM signal includes a frame guard, the frame guard including no signal and having a length less than a length of the series of transmission time slots, the frame guard following after the series of transmission time slots, and

wherein the length of the frame guard is longer than a length of a guard interval.

9. The transmitting device according to claim 8, wherein the guard interval is set before an effective symbol period in a transmission time slot.

10. The transmitting device according to claim 8, wherein a length of an effective symbol period in a transmission time slot is longer than the length of the guard interval in the transmission time slot.

11. The transmitting apparatus according to claim 8, wherein the transmitting apparatus further comprising at least one of a cellular communication mechanism, an interface for connecting an internet, a receiver configured to receive GPS signal and an antenna.