OPERATIONS AND MAINTENANCE ARCHITECTURE FOR MULTIPROTOCOL DISTRIBUTED SYSTEM

• US 20080132273A1
• Filed: 11/15/2007
• Published: 06/05/2008
• Est. Priority Date: 03/29/2000
• Status: Active Grant

• Current Assignee: Commscope Emea Limited (CommScope Holding Company, Inc.), CommScope Technologies, LLC (CommScope Holding Company, Inc.)
• Original Assignee: ADC Wireless Solutions LLC
• Inventors: Millar, Jeffrey R., Sabat, John
• Granted Patent: US 7,991,903 B2
• Time in Patent Office: Days
• US Class Current: 455/552.1
• CPC Class Codes: H04L 41/0213 Standardised network management protocols, e.g. simple network management protocol [SNMP]
• CPC Class Codes: H04L 63/0227 Filtering policies mail message filtering H04L51/212
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04W 12/088 using filters or firewalls
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 88/00 Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices

Abstract

An architecture for providing operations and maintenance functionality in an open access wireless signal distribution system. The open access system makes use of a common, shared, distributed radio frequency distribution network and associated network entities that enable a system operator to offer access to wireless infrastructure that maybe shared among multiple wireless service providers (WSPs). The WSPs, or tenants of the operators, may obtain access in a tenant lease-space model. The open access system provides the ability for multiple tenants in a given community to share wireless equipment such as remotely located antenna sites, regardless of their specific requirements for radio frequency (RF) air interface signal protocols and/or management messaging formats. The present invention is directed to an open access Network Management System (NMS) that provides multiple tenants with an appropriate level of access and control over the system elements that carry their signaling. For example, in addition to forwarding messages from tenant-controlled NMSs to the open access system elements, the open access NMS preferably acts as a caching firewall to ensure that the tenant NMS are permitted privileges to access only those system elements to which they are a properly assigned. A database function included with the open access NMS may be used to build and maintain a database of operations and maintenance information from autonomously initiated poll and status functions. This then permits queries from tenant NMSs to be answered without the need to duplicate open system network traffic.

Claims

1. A system comprising:

a first unit to receive first base station signals from a first tenant base station operated by a first wireless communication service provider and to receive second tenant base station signals from a second tenant base station operated by a second wireless communication service provider;

wherein the first unit comprises a transport medium interface to convert the first and second base station signals and control messages relating thereto for transport on a common transport medium;

wherein the system further comprises a plurality of remotely located second units, each second unit coupled to receive signals from the common transport medium, with each second unit radiating radio frequency signals derived form at least one of the first and second base station signals; and

wherein the first unit is operable to receive control messages from a first tenant network management system operated by the first wireless communication service provider and from a second tenant network management system operated by the second wireless communication service provider;

wherein the system further comprises a common network management system that forwards control messages to equipment associated with one or more of the second units using the common transport medium.

2. A system as in claim 1 where in the common network management system additionally filters forwarded messages to limit access by tenants to status and control information associated only with the equipment associated with one or more of the second units that is operated by the other tenants.

3. A system as in claim 2 wherein the common network management system further comprises:

a statefull firewall configured such that the common network management system appears to be an agent for interfaces to tenant network management systems, but appears as a client to open access system elements

4. A system as in claim 3 wherein the statefull firewall additionally comprises:

a management information block for maintaining configuration information that defines access privileges that a particular tenant client may have.

5. A system as in claim 1 wherein the common network management system additionally comprises:

a local database store containing information from poll and status information requests that the common network management system originates.

6. A system as in claim 5 wherein the common network management system additionally comprises:

a poll and status request message interceptor, which intercepts messages from the tenant network management systems intended for the second units and attempts to respond from information contained in the local database.

7. A method for providing multiple wireless communication service providers with access to equipment distributed throughout a coverage area, the method comprising:

accepting requests for distribution service from multiple wireless service providers, the requests specifying a desired air interface for wireless communication from among a plurality of available air interfaces, and an indication of which portions of the coverage area the particular air interface is to be supported;

providing communication network connections to network management system equipment for operating and controlling base station equipment as provided by the multiple wireless service providers;

a plurality of remotely located radio access nodes, each radio access node associated with a predetermined portion of a total system coverage area, and each radio access node coupled to receive signals from a common transport medium, with each radio access node containing at least first and second equipment associated with respective first and second wireless service providers; and

installing a common network management system for intercepting control message traffic from and to the network management systems operated by the multiple wireless service providers intended to control to radio access nodes, and routing such messages to a common control message handler.

8. A method as in claim 7 wherein the common control message handler is a shared transport medium over which control messages are routed to the radio access nodes.

9. A method as in claim 7 wherein the common control message handler is process comprising:

sending generic status query messages to the radio access nodes;

storing, in a local information database, responses to the generic status query messages; and

in response to control message originating from one of the tenant network management systems, obtaining status information from the local database.

10. A system comprising:

a first unit to receive first radio frequency signals from a first tenant network access device specified by a first communication service provider and to receive second radio frequency signals from a second tenant network access device specified by a second communication service provider;

wherein the first unit comprises a transport medium interface for converting the first and second radio frequency signals for transport on a common transport medium;

wherein the system further comprises a plurality of remotely located network access nodes, each network access node associated with a predetermined portion of a total network system coverage area, and each network access node coupled to receive signals from the common transport medium, with each network access node containing at least a first and second equipment associated with the respective first and second tenant network access devices; and

wherein the first unit is operable to receive control messages from a first tenant network management system operated by the first communication service provider and from a second tenant network management system operated by the second communication service provider;

wherein the system further comprises a common network management system that forwards control messages from the respective tenant network management system to the intended first and second equipment associated with respective ones of the network access nodes using the common transport medium.

11. A system as in claim 10 where in the common network management system additionally filters forwarded messages to limit access by tenants to status and control information associated only with network access node equipment operated by other tenants.

12. A system as in claim 10 wherein the common network management system further comprises:

a statefull firewall for filtering messages such that the common network management system appears to be an agent for interfaces of tenant network management systems, but appears as a client to open access system elements.

13. A system as in claim 12 wherein the statefull firewall additionally comprises:

a local data store for maintaining configuration information that defines access privileges that a particular tenant client may have.

14. A system as in claim 10 wherein the common network management system additionally comprises:

a local database for storing data taken from poll and status information requests originated by the common network management system.