Cellular digital packet data mobile data base station

• US 6,122,527 A
• Filed: 01/17/1996
• Issued: 09/19/2000
• Est. Priority Date: 11/12/1993
• Status: Expired due to Term

• Current Assignee: ADC Mobile Systems Incorporated, CommScope Technologies, LLC (CommScope Holding Company, Inc.), ADC Telecommunications Incorporated (TE Connectivity Limited)
• Original Assignee: ADC Telecommunications Incorporated (TE Connectivity Limited)
• Inventors: Balachandran, Kumar, Wong, Matt, Graham, Sue, Schjelderup, Gail, Gardner, Steven H., Quick, Roy Franklin Jr., Kasmir, Seton P., Robinson, Mark T.
• Primary Examiner(s): CUMMING, WILLIAM D
• Application Number:
  US08/587,685
• Time in Patent Office: 1,707 Days
• Field of Search: 379/58, 379/59, 370/60.1, 370/94.1, 455/557
• US Class Current: 455/557
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

A cellular digital packet data (CDPD) system includes a mobile data base station (MDBS) configured to interface easily with an advanced mobile phone system (AMPS). The elements of the MDBS are arranged on modules and the functionality of the MDBS is divided among the modules to facilitate flexibility, compactness and quick expansion of the MDBS. To further facilitate compactness, the MDBS includes a transceiver/modem board which uses a single chip to carry out delta-sigma modulation. In order to maintain the integrity of CDPD transmission, a channel hopping scheme is used based upon avoidance of AMPS channel use. A distinctive protocol is used to encapsulate control/query/response data for transmission throughout the CDPD system. This protocol also facilitates easy control of each MDBS throughout the system.

Claims

1. A mobile data base station (MDBS) configured to transfer cellular digital packet data (CPDP) between at least one mobile end system (M-ES) and a mobile data intermediate service (MD-IS), said MDBS comprising:

a controller board operatively connected to said MD-IS via a data link and arranged to receive and convey operating instructions;

a transceiver board providing a radio link to said at least one M-ES and arranged to operate based on instructions received from said controller board, said transceiver board being separate and distinct from said controller board;

said MDBS is collocated with a mobile phone system station;

said controller board and said transceiver board are operatively interconnected through a backplane;

at least one power supply board is operatively connected to supply power to said controller board and said transceiver board through said backplane;

wherein said power supply board comprises means for detecting power abnormalities throughout said power supply board, said backplane, said controller board and said transceiver board;

a chassis, in which said controller board, said transceiver board and said power board are slidably mounted in a vertical position, and including a plurality of distinct mounting positions for said controller board, said transceiver board and said power supply board;

wherein said chassis includes distinct mounting positions for a plurality of controller boards, a plurality of transceiver boards and a plurality of power supply boards;

a second power supply board, said second power supply board operates in response to said means for detecting power abnormalities to operate in a redundant manner sharing load from said controller board and the transceiver board; and

wherein said power supply boards operate in a redundant manner responsive to at least one said controller board.

2. The MDBS of claim 1, wherein said controller board comprises a control processor programmed for radio resource management and generation of control commands to said transceiver board and an input/output (I/O) processor programmed for routing data throughout said MDBS, said control processor and said I/O processor being operatively connected to each other.

3. The MDBS of claim 2, wherein said control processor is operatively connected to said data link through said I/O processor, and said I/O processor is also operatively connected to said backplane.

4. The MDBS of claim 3, wherein said data link is a class zero data switching (DS0) channel.

5. The MDBS of claim 3, wherein said I/O processor is operatively connected to said backplane using a high level data link control (HDLC) protocol.

6. The MDBS of claim 2, wherein said I/O processor is operatively connected to a first utility port.

7. The MDBS of claim 6, wherein said I/O processor comprises means for receiving program instructions through said first utility port.

8. The MDBS of claim 4, wherein said I/O processor comprises means for receiving program instructions through said data link.

9. The MDBS of claim 5, wherein said controller board further comprises a dual port random access memory (DPRAM) operatively connected to and that facilitates communications between said control processor and said I/O processor.

10. The MDBS of claim 5, wherein said backplane comprises means for transmitting data between a plurality of controller boards and transceiver boards.

11. The MDBS of claim 10, wherein said means for transmitting comprises at least two HDLC protocol serial bus lines.

12. The MDBS of claim 1, further comprising connectors at each of said distinctive mounting positions, said connectors being arranged to provide contact between respective boards and an HDLC serial bus on said backplane board, and each said connector having a predetermined impedance suitable for inserting a board in a respective mounting position without creating power abnormalities.

13. The MDBS of claim 1, further comprising a plurality of said controller boards, operatively connected through said backplane in a master/slave relationship between one of said controller boards and all remaining controller boards.

14. The MDBS of claim 13, wherein said slave controller boards operate in a redundant fashion to said master controller board.

15. The MDBS of claim 2, wherein said control processor comprises a circuit that selects a channel for CDPD communications.

16. The MDBS of claim 15, wherein said control processor generates a health and status polling signal.

17. The MDBS of claim 16, wherein said health and status polling signal is generated at least once per second.

18. The MDBS of claim 2, further comprising a plurality of front end equipment shared with said mobile phone system base station.

19. The MDBS of claim 18, wherein each of said plurality of front end equipment comprises a plurality of antennas.

20. The MDBS of claim 19, comprising means for combining signals from the plurality of antennas.

21. The MDBS of claim 20, wherein said plurality of antennas comprises three antennas.

22. The MDBS of claim 21, further comprising a channel dedicated to CDPD communications.

23. The MDBS of claim 22, wherein said third antenna is dedicated to CDPD communications.

24. The MDBS of claim 2, further comprising a plurality of channels used for CDPD communications.

25. The MDBS of claim 19, wherein each of said front end equipment further comprises duplexers operatively connected to radio frequency amplifiers.

26. The MDBS of claim 2, wherein said controller board and said transceiver board comprise means for carrying out a plurality of communication protocols.

27. The MDBS of claim 26, wherein said communication protocols include physical layer, medium access control layer, data link layer, and MDBS utility (MUP) and network layer.

28. The MDBS of claim 26, wherein said I/O processor further comprises means for developing a queue of suggested transfer channels based upon output signals from a sniffer.

29. The MDBS of claim 26, wherein said queue information is transmitted from said MDBS to mobile subscribers on a periodic basis.

30. A mobile data base station (MDBS) configured to transfer cellular digital packet data (CDPD) between at least one mobile end system (M-ES) and a mobile data intermediate service (MD-IS), said MDBS comprising:

a controller board operatively connected to said MD-IS via a data link and arranged to receive and convey operating instructions;

a transceiver board providing a radio link to said at least one subscriber M-BS and arranged to operate based on instructions received from said controller board, said transceiver board being separate and distinct from said controller board;

a plurality of power supply boards operatively connected to supply power to said controller board and said transceiver board through a backplane;

a chassis, in which said controller board, said transceiver board and said power board are slidably mounted in a vertical position, and including a plurality of distinct mounting positions for said controller board, said transceiver board and said plurality of power supply boards;

wherein said chassis includes distinct mounting positions for said controller board, said transceiver board and said plurality of power supply boards;

wherein said plurality of power supply boards comprises means for detecting power abnormalities throughout said plurality of power supply boards, said backplane, said controller board and said transceiver board;

wherein said plurality of power supply boards operate in response to said means for detecting power abnormalities to operate in a redundant manner sharing load from said controller board and said transceiver board;

wherein said MDBS is collocated with a mobile phone system base station;

wherein said controller board and said transceiver board are operatively interconnected through said backplane; and

wherein said plurality of power supply boards operate in the redundant manner responsive to said controller board.