Information transmitting apparatus and method, information receiving apparatus and method, and information transmitting/receiving apparatus and method

• US 20030056045A1
• Filed: 11/12/2002
• Published: 03/20/2003
• Est. Priority Date: 10/15/1998
• Status: Active Grant

• Current Assignee: Pioneer Corporation
• Original Assignee: Pioneer Corporation
• Inventors: Ono, Kinya, Murakoshi, Sho, Usuba, Hidemi, Minoshima, Kunihiro, Matsumaru, Makoto, Hasebe, Seiichi
• Granted Patent: US 6,810,453 B2
• Time in Patent Office: Days
• US Class Current: 710/104
• CPC Class Codes: H04N 21/4131 home appliance, e.g. lighting, air conditioning system, metering devices home automation data switching networks exchanging configuration information on appliance services H04L12/2807
• CPC Class Codes: H04N 21/43615 Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals home Audio Video Interoperability [HAVI] data switching networks H04L12/2805
• CPC Class Codes: H04N 21/43632 involving a wired protocol, e.g. IEEE 1394 high-speed IEEE 1394 serial bus H04L12/40052

Abstract

An information transmitting apparatus is included in a system for transmitting information through a bus (B), for transmitting the information onto the bus. The information transmitting apparatus is provided with: an initialization detecting device (1) for detecting whether or not the bus is initialized; an obtaining device (6) for obtaining post-initialization information, which is the information transmitted on the bus immediately after an initialization of the bus when the initialization of the bus is detected by the initialization detecting device; and a transmission controlling device (3) for judging whether or not transmission information, which is the information to be transmitted onto the bus, can be transmitted in accordance with the obtained post-initialization information, and then transmitting the transmission information onto the bus if it is judged that the transmission information can be transmitted.

Claims

1. An information transmitting apparatus, which is included in a system for transmitting information through a bus, for transmitting the information onto the bus, said information transmitting apparatus comprising:

an initialization detecting device for detecting whether or not the bus is initialized;

an obtaining device for obtaining post-initialization information, which is the information transmitted on the bus immediately after an initialization of the bus when the initialization of the bus is detected by said initialization detecting device; and

a transmission controlling device for judging whether or not transmission information, which is the information to be transmitted onto the bus, can be transmitted in accordance with the obtained post-initialization information, and then transmitting the transmission information onto the bus if it is judged that the transmission information can be transmitted.

2. An information transmitting apparatus according to claim 1, further comprising:

a channel judging device for judging whether or not a use channel, which is a channel used by the transmission information, is already used by the post-initialization information on the bus in accordance with the obtained post-initialization information;

an occupied period detecting device for detecting a transmission occupied period, which is a period occupied while the post-initialization information is transmitted on the bus, in accordance with the obtained post-initialization information; and

an occupied period judging device for judging whether or not an occupied period sum, which is a sum of the detected transmission occupation period and the transmission occupation period corresponding to the transmission information, is shorter than a predetermined allowable period based on a performance of the bus,

said transmission controlling device transmitting the transmission information onto the bus, if the use channel is not used by the post-initialization information and further the occupation period sum is shorter than the predetermined allowable time, in accordance with a judgment result of said channel judging device and a judgment result of said occupied period judging device.

3. An information transmitting apparatus according to claim 2, wherein said transmission controlling device controls a managing device, which manages the channel presently used within the system and the transmission occupied period presently occupied, to manage the transmission occupied period and the use channel corresponding to the transmission information if the use channel is not used by the post-initialization information and further the occupation period sum is shorter than the predetermined allowable time, in accordance with the judgment result of said channel judging device and the judgment result of said occupied period judging device.

4. An information receiving apparatus, which is included in a system for transmitting information through a bus, for receiving the information transmitted by an information transmitting apparatus for transmitting the information onto the bus, said information transmitting apparatus comprising:

(i) a first initialization detecting device for detecting whether or not the bus is initialized;

(ii) an obtaining device for obtaining post-initialization information, which is the information transmitted on the bus immediately after an initialization of the bus when the initialization of the bus is detected by said first initialization detecting device; and

(iii) a transmission controlling device for judging whether or not transmission information, which is the information to be transmitted onto the bus, can be transmitted in accordance with the obtained post-initialization information, and then transmitting the transmission information onto the bus if it is judged that the transmission information can be transmitted, said information receiving apparatus comprising;

a second initialization detecting device for detecting whether or not the bus is initialized;

a continuity detecting device for receiving the post-initialization information when the bus is initialized according to a detection result of said second initialization detecting device, and detecting a presence or absence of a continuity between the information received before the initialization and the post-initialization information; and

a demodulating device for determining that the received post-initialization information is the transmission information only if there is the continuity according to a detection result of the continuity detecting device, and then demodulating the received post-initialization information.

5. An information receiving apparatus according to claim 4, wherein said continuity detecting device detects order information, which is included in an information unit in the post-initialization information and indicates an order of the information unit in the post-initialization information, and detects the continuity if there is a continuity between the order information in the information received before the initialization and the order information in the post-initialization information.

6. An information transmitting/receiving apparatus, which is included in a system for transmitting information through a bus, comprising an information transmitting apparatus for transmitting the information onto the bus, and an information receiving apparatus for receiving the information transmitted onto the bus by said information transmitting apparatus,

(I) said information transmitting apparatus comprising:

an initialization detecting device for detecting whether or not the bus is initialized;

an obtaining device for obtaining post-initialization information, which is the information transmitted on the bus immediately after an initialization of the bus when the initialization of the bus is detected by said initialization detecting device; and

a transmission controlling device for judging whether or not transmission information, which is the information to be transmitted onto the bus, can be transmitted in accordance with the obtained post-initialization information, and then transmitting the transmission information onto the bus if it is judged that the transmission information can be transmitted,

(II) said information receiving apparatus comprising;

a continuity detecting device for receiving the post-initialization information when the bus is initialized according to a detection result of said second initialization detecting device, and detecting a presence or absence of a continuity between the information received before the initialization and the post-initialization information; and

a demodulating device for determining that the received post-initialization information is the transmission information only if there is the continuity according to a detection result of the continuity detecting device, and then demodulating the received post-initialization information.

7. An information transmitting/receiving apparatus according to claim 6, wherein

said information transmitting apparatus further comprises:

a channel judging device for judging whether or not a use channel, which is a channel used by the transmission information, is already used by the post-initialization information on the bus in accordance with the obtained post-initialization information;

an occupied period detecting device for detecting a transmission occupied period, which is a period occupied while the post-initialization information is transmitted on the bus, in accordance with the obtained post-initialization information; and

an occupied period judging device for judging whether or not an occupied period sum, which is a sum of the detected transmission occupation period and the transmission occupation period corresponding to the transmission information, is shorter than a predetermined allowable period based on a performance of the bus,

said transmission controlling device transmitting the transmission information onto the bus, if the use channel is not used by the post-initialization information and further the occupation period sum is shorter than the predetermined allowable time, in accordance with a judgment result of said channel judging device and a judgment result of said occupied period judging device.

8. An information transmitting method, in a system for transmitting information through a bus, of transmitting the information onto the bus, said information transmitting method comprising:

an initialization detecting process of detecting whether or not the bus is initialized;

an obtaining process of obtaining post-initialization information, which is the information transmitted on the bus immediately after an initialization of the bus when the initialization of the bus is detected by said initialization detecting process; and

a transmission controlling process of judging whether or not transmission information, which is the information to be transmitted onto the bus, can be transmitted in accordance with the obtained post-initialization information, and then transmitting the transmission information onto the bus if it is judged that the transmission information can be transmitted.

9. An information transmitting method according to claim 8, further comprising:

a channel judging process of judging whether or not a use channel, which is a channel used by the transmission information, is already used by the post-initialization information on the bus in accordance with the obtained post-initialization information;

an occupied period detecting process of detecting a transmission occupied period, which is a period occupied while the post-initialization information is transmitted on the bus, in accordance with the obtained post-initialization information; and

an occupied period judging process of judging whether or not an occupied period sum, which is a sum of the detected transmission occupation period and the transmission occupation period corresponding to the transmission information, is shorter than a predetermined allowable period based on a performance of the bus,

said transmission controlling process transmitting the transmission information onto the bus, if the use channel is not used by the post-initialization information and further the occupation period sum is shorter than the predetermined allowable time, in accordance with a judgment result of said channel judging process and a judgment result of said occupied period judging process.

10. An information transmitting method according to claim 9, wherein said transmission controlling process controls a managing device, which manages the channel presently used within the system and the transmission occupied period presently occupied, to manage the transmission occupied period and the use channel corresponding to the transmission information if the use channel is not used by the post-initialization information and further the occupation period sum is shorter than the predetermined allowable time, in accordance with the judgment result of said channel judging process and the judgment result of said occupied period judging process.

11. An information receiving method, in a system for transmitting information through a bus, of receiving the information transmitted by an information transmitting method of transmitting the information onto the bus, said information transmitting method comprising:

(i) a first initialization detecting process of detecting whether or not the bus is initialized;

(ii) an obtaining process of obtaining post-initialization information, which is the information transmitted on the bus immediately after an initialization of the bus when the initialization of the bus is detected by said first initialization detecting process; and

(iii) a transmission controlling process of judging whether or not transmission information, which is the information to be transmitted onto the bus, can be transmitted in accordance with the obtained post-initialization information, and then transmitting the transmission information onto the bus if it is judged that the transmission information can be transmitted, said information receiving method comprising;

a second initialization detecting process of detecting whether or not the bus is initialized;

a continuity detecting process of receiving the post-initialization information when the bus is initialized according to a detection result of said second initialization detecting process, and detecting a presence or absence of a continuity between the information received before the initialization and the post-initialization information; and

a demodulating process of determining that the received post-initialization information is the transmission information only if there is the continuity according to a detection result of the continuity detecting process, and then demodulating the received post-initialization information.

12. An information receiving method according to claim 11, wherein said continuity detecting process detects order information, which is included in an information unit in the post-initialization information and indicates an order of the information unit in the post-initialization information, and detects the continuity if there is a continuity between the order information in the information received before the initialization and the order information in the post-initialization information.

13. An information transmitting/receiving method, in a system for transmitting information through a bus, comprising an information transmitting method of transmitting the information onto the bus, and an information receiving method of receiving the information transmitted onto the bus by said information transmitting method,

(I) said information transmitting method comprising:

an initialization detecting process of detecting whether or not the bus is initialized;

an obtaining process of obtaining post-initialization information, which is the information transmitted on the bus immediately after an initialization of the bus when the initialization of the bus is detected by said initialization detecting process; and

a transmission controlling process of judging whether or not transmission information, which is the information to be transmitted onto the bus, can be transmitted in accordance with the obtained post-initialization information, and then transmitting the transmission information onto the bus if it is judged that the transmission information can be transmitted,

(II) said information receiving method comprising;

a continuity detecting process of receiving the post-initialization information when the bus is initialized according to a detection result of said second initialization detecting process, and detecting a presence or absence of a continuity between the information received before the initialization and the post-initialization information; and

a demodulating process of determining that the received post-initialization information is the transmission information only if there is the continuity according to a detection result of the continuity detecting process, and then demodulating the received post-initialization information.

14. An information transmitting/receiving method according to claim 13, wherein

said information transmitting method further comprises:

a channel judging process of judging whether or not a use channel, which is a channel used by the transmission information, is already used by the post-initialization information on the bus in accordance with the obtained post-initialization information;

an occupied period detecting process of detecting a transmission occupied period, which is a period occupied while the post-initialization information is transmitted on the bus, in accordance with the obtained post-initialization information; and

an occupied period judging process of judging whether or not an occupied period sum, which is a sum of the detected transmission occupation period and the transmission occupation period corresponding to the transmission information, is shorter than a predetermined allowable period based on a performance of the bus,

said transmission controlling process transmitting the transmission information onto the bus, if the use channel is not used by the post-initialization information and further the occupation period sum is shorter than the predetermined allowable time, in accordance with a judgment result of said channel judging process and a judgment result of said occupied period judging process.