Patent US4780724A successfully refreshed from Google Patents.
Patent EP0357136A1 successfully refreshed from Google Patents.
EP0357136A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Communication system, a station to be used in such a system, and a gate connecting element to be used in such a system, as well as a device comprising such a gate connecting element
Assignee: Koninklijke Philips NV
•
Filing: 1989-08-28
•
Granted: —
•
Expires: 2009-08-28
Abstract
Abstract A communication system is described comprising different buses (20, 46, 56) which are interconnected via one or more gate connecting elements (20, 50). There is a transmitter station transmitting a frame that comprises a target address field and one or more destination address fields. If the send and receiver stations (46, 48, 52, 54) are connected to the same bus, the contents of the target address field are sufficient to define the receiver station. In other cases the target address field defines a gate connecting element, whereas the latter fills the the target address field with the contents of one of the other fields. In this way receiver station addresses, which have already been defined on a previous bus, can again be used on the next bus. Furthermore, in a short-frame format, receiver stations on the same bus as the transmitter station can be addressed with very low overhead.
Inventors
- 👤 Hendrik Marie Hubertus Gerardus Göertz
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 09:57
CPC Classifications
G; G06; G06F; G06F15/00; G06F15/16; H; H04; H04L; H04L12/00; H04L12/28; H04L12/46; H04L12/4604; H04L12/462; H04L12/4625; G08; G08C; G08C15/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
262 words
A communication system comprising a bus system having a first bus and a second bus interconnected by a first gate connecting element, said communication system comprising a transmitter station connected to said first bus and a receiver station connected to any of said first and second bus, said transmitter station having a frame generator for generating a frame having at least a frame length indicator, an address and a data item, a first content of said frame length indicator specifying a short-frame format having a first fixed address length and a first fixed data item length that are exclusively operative on the same bus as the transmitter station is connected to, a second content of said frame length indicator specifying a long-frame format having a second fixed address length that is exclusively operative on the same bus as the transmitter station is connected to and a second specifyable data item length, said second fixed address length allowing for specifying either said receiver station by way of destination address when the receiver station is connected to the same bus as the transmitter station, or for specifying said first gate connection element by way of target address when the receiver station is connected to the second bus, said long-frame format in the latter case accommodating also said receiver station's destination address, said first gate connecting element including transposing means for then transposing the destination address field's content to the target address' field, as a result of which the receiver station can be addressed directly when the above frame is transmitted over the second bus.
Claim 2
Dependent Claim
262 words
A communication system comprising a bus system having a first bus and a second bus interconnected by a first gate connecting element, said communication system comprising a transmitter station connected to said first bus and a receiver station connected to any of said first and second bus, said transmitter station having a frame generator for generating a frame having at least a frame length indicator, an address and a data item, a first content of said frame length indicator specifying a short-frame format having a first fixed address length and a first fixed data item length that are exclusively operative on the same bus as the transmitter station is connected to, a second content of said frame length indicator specifying a long-frame format having a second fixed address length that is exclusively operative on the same bus as the transmitter station is connected to and a second specifyable data item length, said second fixed address length allowing for specifying either said receiver station by way of destination address when the receiver station is connected to the same bus as the transmitter station, or for specifying said first gate connection element by way of target address when the receiver station is connected to the second bus, said long-frame format in the latter case accommodating also said receiver station's destination address, said first gate connecting element including transposing means for then transposing the destination address field's content to the target address' field, as a result of which the receiver station can be addressed directly when the above frame is transmitted over the second bus.
Claim 3
Dependent Claim
54 words
A communication system as claimed in Claim 1, wherein the first gate connecting element acts as a transmitter station for a second gate connection element that is connected to the second bus for thereon acting as a receiver station, and which is, together with a second receiver station, is connected to a third bus.
Claim 4
Dependent Claim
27 words
A communication system as claimed in Claim 2, comprising a series of interconnected buses, wherein respective gate connecting elements are inserted between any pair of interconnected buses.
Claim 5
Dependent Claim
46 words
A communication system as claimed in Claim 1, 2 or 3, wherein two receiver stations having identical destination addresses are connected to different buses of the system and can be addressed by a specific transmitter station by means of identical destination addresses and different target addresses.
Claim 6
Dependent Claim
112 words
A communication system as claimed in one of the Claims 1 to 4, wherein the destination address field, as a first field, forms part of a series of various fields of uniform lengths, which series is situated between this first field and a last field, and said transposing means comprise rotating means for moving the contents of the remaining fields of said series by one position in the direction of the first field, in conjunction with the said transposing operation, as a result of which said first field comprises a then current destination address, and further means for transposing the contents of the received target address field to the said last field.
Claim 7
Dependent Claim
43 words
A communication system as claimed in Claim 5, wherein the transmitter station further includes an original address generator for filling said last field with an original address, so that the frame in this last field always indicates the current origin on that bus.
Claim 8
Dependent Claim
42 words
A communication system as claimed in one of the Claims 1 to 6, wherein said receiver station is included in a category of stations, and the contents of the destination address formed by the transmitter station are permanently assigned to said category.
Claim 9
Dependent Claim
39 words
A communication system as claimed in one of the Claims 1 to 7, wherein each one of a plurality of gate connecting elements connected to an arbitrary bus can be defined by individual contents of the target address field.
Claim 10
Dependent Claim
27 words
A communication system as claimed in one of the Claims 1 to 8, wherein all said buses comprise a data path having a width of 1 bit.
Claim 11
Dependent Claim
32 words
A communication system as claimed in any of claims 1 to 9, wherein said first fixed data item length is less than a lower bound to said second specifyable data item length.
Claim 12
Dependent Claim
31 words
A communication system as claimed in any of claims 1 to 10, wherein short-frame format has a length which is less than a second lower bound to said long-frame format's length.
Claim 13
Dependent Claim
60 words
A transmitter station for use in a communication system as claimed in one of the Claims 1 to 11, wherein the transmitter device is operative for placing said target address field in a frame position before any destination address field when a receiver station is to be activated which is connected to a different bus than the above transmitter station.
Claim 14
Dependent Claim
72 words
A gate connecting element for use in a communication system as claimed in one of the Claims 1 to 11, comprising a local memory for storing the contents of all said fields in order of their reception, and read control means for reading out, upon reception, the contents of the said destination address field in a time position which corresponds with a receive position of said target address field inside the frame.
Claim 15
Dependent Claim
46 words
A device comprising a gate connecting element as claimed in Claim 13, and also including at least two external connections for as many buses, and an internal station that is connected between a user function in that device and at least one of the latter buses.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.