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

• US 6,810,453 B2
• Filed: 11/12/2002
• Issued: 10/26/2004
• Est. Priority Date: 10/15/1998
• Status: Expired due to Fees

• Current Assignee: Pioneer Corporation
• Original Assignee: Pioneer Corporation
• Inventors: Ono, Kinya, Murakoshi, Sho, Usuba, Hidemi, Minoshima, Kunihiro, Matsumaru, Makoto, Hasebe, Seiichi
• Primary Examiner(s): Myers, Paul R.
• Application Number:
  US10/291,829
• Publication Number:
  US 20030056045A1
• Time in Patent Office: 714 Days
• Field of Search: 710/104, 710/107, 710/22, 710/23, 710/24, 710/33, 710/100, 370/409, 370/432, 370/440, 370/449, 370/462, 713/1-100
• US Class Current: 710/107
• 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 receiving apparatus for receiving transmission information transmitted by an information transmitting apparatus for transmitting transmission information onto a bus, wherein the information transmitting apparatus comprises a judging device that;

judges whether or not the transmission information can be transmitted in accordance with post-initialization information, which is information transmitted from at least one other node onto the bus immediately after the bus is initialized, wherein

the information receiving apparatus detects a presence or absence of a continuity between pre-initialization information received before the bus is initialized and the post-initialization information, and receives the post-initialization information as the transmission information only if there is the continuity according to the detected result.

2. An information transmitting/receiving apparatus comprising an information transmitting apparatus for transmitting transmission information onto a bus, and an information receiving apparatus for receiving the transmission information transmitted by the information transmitting apparatus, wherein

the information transmitting apparatus comprises a judging device that judges whether or not the transmission information can be transmitted in accordance with post-initialization information, which is information transmitted from at least one other node onto the bus immediately after the bus is initialized, and

the information receiving apparatus detects a presence or absence of a continuity between pre-initialization information received before the bus is initialized and the post-initialization information, and receives the post-initialization information as the transmission information only if there is the continuity according to the detected result.

3. An information transmission apparatus, comprising:

a transmitting unit connected to a bus; and

a judging device that judges whether or not transmission information can be transmitted by the transmitting unit based on post-initialization information on the bus, wherein the post-initialization information comprises information which is output to the bus from at least one other node connected to the bus before the bus is initialized and which is being transmitted onto the bus after the bus is initialized.

4. The information transmission apparatus according to claim 3, wherein the judging of the judging device is based at least in part on whether the transmission occupation period used before the bus is initialized can be reserved after the bus is initialized.

5. The information transmission apparatus according to claim 3, wherein the judging of the judging device is based at least in part on whether the transmission channel used before the bus is initialized can be used after the bus is initialized.

6. An information receiving apparatus which comprises a receiving unit connected to a bus for comparing pre-initialization information processed by the receiving unit before the bus is initialized and post-initialization information detected by the receiving unit alter the bus is initialized,

wherein the post-initialization information comprises information which is output to the bus from at least one other node connected to the bus and which is being transmitted onto the bus after the bus is initialized, and

wherein the receiving unit processes the post-initialization information only if continuity between the pre-initialization information and post-initialization information is detected.

7. An information receiving apparatus which comprises a receiving unit connected to a bus for comparing pre-initialization information processed by the receiving unit before the bus is initialized and post-initialization information detected by the receiving unit after the bus is initialized,

wherein the post-initialization information comprises information which is output to the bus from at least one other node connected to the bus and which is being transmitted onto the bus after the bus is initialized,

wherein the receiving unit processes the post-initialization information only if continuity between the pre-initialization information and post-initialization information is detected, and

wherein the continuity is determined by comparing data block counter (DEC) information for the pre-initialization information and the post-initialization information.

8. A communication system, comprising:

a first node comprising a transmitting unit connected to a bus; and

a judging device that, when the bus is initialized, judges whether or not transmission information can be transmitted by the transmitting unit based on first post-initialization information on the bus, wherein the first post-initialization information comprises information which as output to the bus from a node connected to the bus before the bus is initialized and which is being transmitted onto the bus after the bus is initialized; and

a second node comprising a receiving unit connected to the bus for comparing pre-initialization information processed by the receiving unit before the bus is initialized and second post-initialization information detected by the receiving unit after the bus is initialized, wherein the second post-initialization information comprises information which is output to the bus from a node connected to the bus before the bus is initialized and which is being transmitted onto the bus after the bus is initialized, and wherein the receiving unit processed the second post-initialization information only if continuity between the pre-initialization information and the second post-initialization information is detected,

wherein the continuity is determined by comparing data block counter (DBC) information for the pre-initialization information and the second post-initialization information.

9. An information transmitting apparatus for transmitting transmission information onto a bus, comprising:

a judging device that judges whether or not the transmission information can be transmitted in accordance with post-initialization information which is transmitted from at least one other node onto the bus immediately after the bus is initialized.