Satellite receiver module for telecommunication equipment

• US 9,618,623 B2
• Filed: 11/25/2013
• Issued: 04/11/2017
• Est. Priority Date: 11/26/2012
• Status: Active Grant

• Current Assignee: Coriant Oy (Infinera Corp.)
• Original Assignee: Coriant Oy (Infinera Corp.)
• Inventors: Hann, Kenneth
• Primary Examiner(s): Phan, Dao
• Application Number:
  US14/088,692
• Publication Number:
  US 20140145875A1
• Time in Patent Office: 1,233 Days
• Field of Search: 342352, 342356, 34235721, 34235746, 34235776, 701468, 701470
• CPC Class Codes: G01S 19/13 Receivers
• CPC Class Codes: H04W 56/00 Synchronisation arrangements

Abstract

A satellite receiver module (101) for telecommunication equipment includes circuitries (102, 103) configured to: receive timing information from one or more satellites, run at least a part of master-end functions of a synchronization protocol suitable for synchronizing master and slave clock-times over a data transfer network, and convert the timing information into timing messages that are accordant with the synchronization protocol. The satellite receiver module further includes a data interface (104) including a connector (105) for detachably attaching to a body device of the telecommunication equipment and for transferring a bit stream carrying the timing messages to the body device. Because the timing information received from the one or more satellites is converted into the timing messages that are accordant with the synchronization protocol, the timing information can be transferred among other possible digital data, e.g. location information, from the satellite receiver module to the body device.

Claims

1. A satellite receiver module for telecommunication equipment, the satellite receiver module being:

a plug-in unit connectable to a body device of the telecommunication equipment, the satellite receiver module comprising;

a first circuitry for receiving timing information from one or more satellites,

a second circuitry for running at least a part of master-end functions of a synchronization protocol and for converting the timing information into timing messages that are accordant with the synchronization protocol, the synchronization protocol being suitable for synchronizing master and slave clock-times over a data transfer network, and

a data interface comprising a connector for detachably attaching to the body device of the telecommunication equipment and for transferring a bit stream carrying the timing messages to the body device of the telecommunication equipment.

2. A satellite receiver module according to claim 1, wherein the second circuitry is configured to generate a source indicator message indicating that the timing information carried by the timing messages has been received from a satellite system comprising the one or more satellites, and to set the bit stream to carry the source indicator message.

3. A satellite receiver module according to claim 1, wherein the second circuitry is configured to generate a hop count message indicating that a number of data transfer links, via which the timing information has been transferred, is zero, and to set the bit stream to carry the hop count message.

4. A satellite receiver module according to claim 1, wherein the second circuitry is configured to generate the timing messages so that each timing message comprises a first field including first bits and a value contained by the first field is a cumulative value that has been changed with a pre-determined amount for each one of successive timing pulses contained by the received timing information.

5. A satellite receiver module according to claim 4, wherein the second circuitry is configured to generate each timing message in advance prior to receiving the corresponding timing pulse contained by the received timing information and to include the timing message in the bit stream in response to reception of the corresponding timing pulse.

6. A satellite receiver module according to claim 1, wherein the data interface comprises an electrical connector comprising connector poles for providing galvanic couplings with corresponding connector poles of the body device.

7. A satellite receiver module according to claim 1, wherein the data interface comprises an optical interface for generating an optical signal carrying the bit stream.

8. A satellite receiver module according to claim 1, wherein the second circuitry is configured to set bits of the bit stream to indicate the timing messages when the bit stream is in a form corresponding to a line-code used by the data interface, the line-code defining the manner the bit stream is encoded to properties of an analogue signal of the connector.

9. A satellite receiver module according to claim 1, wherein the synchronization protocol is a synchronization protocol in which a difference Δ

φ

between the slave and master clock-times is computable according to the equation;

Δ

φ

=((T₂−

T₁)−

(T₄−

T₃))/2,

where T₁ is a value of the master clock-time at a transmission moment of a first one of the timing messages accordant with the synchronization protocol from a master-end, T₂ is a value of the slave clock-time at a reception moment of the first one of the timing message at the slave-end, T₃ is a value of the slave clock-time at a transmission moment of a second one of the timing messages accordant with the synchronization protocol from the slave-end, and T₄ is a value of the master clock-time at a reception moment of the second one of the timing messages at the master-end, the satellite receiver module representing the master-end and the body device-representing the slave-end.

10. A satellite receiver module according to claim 1, wherein the synchronization protocol is according to the IEEE 1588 specification.

11. A satellite receiver module according to any of claims 1, wherein the data interface is configured to use Ethernet protocol for transferring the bit stream to the body device of the telecommunication equipment.

12. Telecommunication equipment comprising a satellite receiver module and a body device, wherein the satellite receiver module is a plug-in unit connectable to the body device and the satellite receiver module comprises:

a first circuitry for receiving timing information from one or more satellites,

a second circuitry for running at least a part of master-end functions of a synchronization protocol and for converting the timing information into timing messages that are accordant with the synchronization protocol, the synchronization protocol being suitable for synchronizing master and slave clock-times over a data transfer network, and

a data interface comprising a connector for detachably attaching to a body device of the telecommunication equipment and for transferring a bit stream carrying the timing messages to the body device of the telecommunication equipment, and

wherein the body device comprises;

a data interface comprising a connector for detachably attaching to the connector of the data interface of the satellite receiver module, and

a processing system for running at least a part of slave-end functions of the synchronization protocol on the basis of the timing messages received from the satellite receiver module so as to regenerate the timing information received by the satellite receiver module from the one or more satellites.

13. Telecommunication equipment according to claim 12, wherein the connector of the data interface of the body device is capable of being detachably attached to a data transfer link of a data transfer network and the data interface of the body device is capable of receiving data traffic from the data transfer link of the data transfer network.

14. Telecommunication equipment according to claim 12, wherein the data interface of the body device is configured to support Ethernet protocol.

15. Telecommunication equipment according to claim 12, wherein the body device is at least one of the following:

an internet protocol “

IP”

router, an Ethernet switch, an Asynchronous Transfer Mode “

ATM”

switch, a MultiProtocol Label Switching “

MPLS”

switch.

16. A method comprising:

receiving, at a satellite receiver module of telecommunication equipment, timing information from one or more satellites, the satellite receiver module being a plug-in unit detachably attached to a body device of the telecommunication equipment,

running, in the satellite receiver module, at least a part of master-end functions of a synchronization protocol suitable for synchronizing master and slave clock-times over a data transfer network,

converting, in the satellite receiver module, the timing information into timing messages that are accordant with the synchronization protocol,

transferring a bit stream carrying the timing messages from the satellite receiver module to the body device, and

running, in the body device, at least a part of slave-end functions of the synchronization protocol so as to regenerate the timing information received from the one or more satellites.

17. A non-transitory computer readable medium encoded with a computer program for controlling a satellite receiver module that is a plug-in unit connectable to a body device of telecommunication equipment, the computer program comprising computer executable instructions for controlling a programmable processor of the satellite module to:

run at least a part of master-end functions of a synchronization protocol suitable for synchronizing master and slave clock-times over a data transfer network,

convert timing information received from one or more satellites into timing messages that are accordant with the synchronization protocol, and

control a data interface of the satellite receiver module to transfer a bit stream carrying the timing messages to body device of the telecommunication equipment.