Method And A System For Optimizing Radio Network Layer To Implement The Network Interconnection, And A Method For Interconnection Between The Radio Network And The Wired Network

• US 20080260389A1
• Filed: 06/27/2008
• Published: 10/23/2008
• Est. Priority Date: 12/31/2005
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Zheng, Ruobin
• Granted Patent: US 8,660,430 B2
• Time in Patent Office: Days
• US Class Current: 398/115
• CPC Class Codes: H04Q 11/0067 Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
• CPC Class Codes: H04W 88/12 Access point controller devices
• CPC Class Codes: H04W 92/045 between access point and backbone network device
• CPC Class Codes: H04W 92/14 between access point controllers and backbone network device

Abstract

A method for optimizing a radio network layer to implement a network interconnection is provided. A radio network controller is divided into radio access network servers and wireless adapters configured in a base station. The wireless adapters are adapted to process related radio interface protocols, and are connected to an optical access network via an adaptation function. The radio access network servers and a core network are respectively connected to optical network units to implement the interconnection between an optical network and a radio communication network. Therefore, the single-point failure is effectively prevented, the flexibility and extensibility are improved, it is convenient for networking, and the network coverage is enlarged. It is suitable for the service development and radio access applications in the future, and facilitates the combination with the wired network.

Claims

1. A method for optimizing a radio network layer to implement a network interconnection, comprising:

separating a control function and a bearer function of a radio network controller (RNC) into a radio access network server (RAN-server) and a wireless adapter (WA);

configuring the WA in a base station (BS), wherein the WA is adapted to process related radio interface protocols during communication; and

connecting the WA configured in the BS to an optical access network (OAN) via an adaptation function (AF), and connecting the RAN-server and a core network (CN) of a radio communication network to corresponding optical network units respectively, so as to implement an interconnection between an optical network and the radio communication network.

2. The method according to claim 1, wherein a radio gateway is configured in a radio access network (RAN), and the method further comprises:

configuring the radio gateway between the BS and the CN; and

connecting the radio gateway to the RAN-server.

3. The method according to claim 1, wherein a Layer 2 bridging technology is employed at the OAN network between the WA and the CN, and the AF, an optical network unit/optical network terminal (ONU/ONT), and an optical line terminal (OLT) are all Layer 2 network elements;

or a Layer 3 routing technology is employed between the WA and the CN, and the AF, the ONU/ONT, and the OLT are all Layer 3 network elements.

4. A system for optimizing a radio network layer to implement a network interconnection, comprising a radio access network (RAN) and a corresponding core network (CN), as well as wireless adapters (WAs) and RAN-servers;

wherein

each WA is adapted to process related radio interface protocols;

each WA is configured in a base station (BS), and provides functions of media access control (MAC), radio link control (RLC), packet data convergence protocol (PDCP), cell-specific radio resource management (CS-RRM), and handover (HO) control; and

each RAN-server is adapted to provide functions of relocation between WAs and broadcast distribution.

5. The system according to claim 4, wherein

each WA is further adapted to provide admission control, intra-cell control, and/or QoS scheduling functions;

and

each RAN-server is further adapted to provide functions of multi-cell radio resource management (MC-RRM), paging control, inter-cell control, RANAP message forwarding, RNSAP message forwarding, and handover control between wired access and/or radio access.

6. The system according to claim 4, wherein

the WA or the RAN-server is further adapted to provide a broadcast/multicast control function.

7. The system according to claim 4, further comprising:

a radio gateway, adapted to provide an adaptation function between network elements of CN/radio network controller (RNC) of a new architecture and that of an original architecture;

wherein a many-to-many connection relationship is employed between a network element BS added with WA (BS+WA) and the radio gateway, and a one-to-many or many-to-many connection relationship is employed between the RAN-servers and the radio gateway.

8. A method for an interconnection between a BS and a wired network, comprising:

moving downward a radio interface protocol stack of a radio network to the BS, wherein the BS processes radio interface protocols; and

connecting the BS to the radio network via a passive optical network (PON) or a fiber/coaxial cable hybrid network access network (DOCSIS network), so as to implement radio transmission.

9. The method according to claim 8, wherein moving downward a radio interface protocol stack of a radio network to the BS comprises:

moving downward all processing functions of a radio network controller (RNC) or a base station controller (BSC) into a base station control processor configured in the BS in a WCDMA, GSM, GPRS, or TD-SCDMA network;

moving downward all functions of the BSC and a packet control function (PCF) into the base station control processor configured in the BS, or moving downward all the functions of the BSC alone into the base station control processor configured in the BS in a CDMA2000 network;

moving downward functions of media access control (MAC), radio link control (RLC), packet data convergence protocol (PDCP), cell-specific radio resource management (CS-RRM), and handover (HO) control into the base station control processor configured in the BS in an enhanced 3G network;

moving downward functions of broadcast/multicast control (BMC), admission control, cell control, and/or QoS scheduling into the base station control processor configured in the BS in an enhanced 3G network;

moving downward functions of data path function, handover control, and radio resource management (RRM) into the base station control processor configured in the BS, in a worldwide interoperability for microwave access (WiMAX) network; and

moving downward functions of location register, service flow authentication and management, context function, robust header compression (ROHC), key management, paging control, dynamic host configuration protocol (DHCP) relay, mobile IP foreign agent (MIP FA), proxy mobile IP client (PMIP Client), and/or authentication relay into the base station control processor configured in the BS in the WiMAX network.

10. A system for an interconnection between a BS and a wired network, comprising:

a BS equipment, connected to an optical network unit/optical network terminal (ONU/ONT) equipment of an optical access network (OAN) at a reference point a via at least one pair of wired links, and adapted to accomplish radio access processing of a wireless subscriber, perform a base station control processing on data packets or frames of the accessed wireless subscriber and then deliver the processed data packets or frames to the ONU/ONT equipment, and perform the base station control processing on data packets or frames from the ONU/ONT equipment and then output the processed data packets or frames to the wireless subscriber; and

the ONU/ONT equipment, connected to the BS equipment and an optical line terminal (OLT) of the OAN respectively, and adapted to convert data packets or frames from the BS equipment into optical signals and then deliver the optical signals to the OLT of the OAN, and convert data packets or frames from the OLT into electrical signals and then deliver the electrical signals to the BS equipment.

11. The system according to claim 10, wherein the BS equipment comprises:

physical layer processing units, adapted to accomplish an access of a wireless subscriber, deliver data packets or frames of the accessed wireless subscriber to a base station controller (BSC) processing unit, and deliver data packets or frames delivered from the BSC processing unit to the wireless subscriber, wherein the physical layer processing units comprise at least one processing unit, and each processing unit comprises an antenna, a radio frequency (RF) processing module, an intermediate frequency processing module, and a base band processing module;

the BSC processing unit, adapted to perform an uplink base station control processing on data packets or frames delivered from the physical layer processing units and then deliver the processed data packets or frames to base station wired interface units or transmit the processed data packets or frames back to the physical layer processing units, and perform a downlink base station control processing on data packets or frames delivered from the base station wired interface units and then deliver the processed data packets or frames to the physical layer processing units, wherein the BSC processing unit comprises at least one processing unit, and each processing unit comprises a wireless data link layer processing module or comprises a wireless data link layer processing module and a processing module of layers over the wireless data link layer; and

the base station wired interface units, connected to the ONU/ONT equipment, and adapted to process data packets or frames from the BSC processing unit and then deliver the processed data packets or frames to the ONU/ONT equipment, and process data packets or frames from the ONU/ONT equipment and then deliver the processed data packets or frames to the BSC processing unit.

12. The system according to claim 10, wherein the ONU/ONT equipment comprises:

wired interface units, connected to the BS equipment, and adapted to perform a wired interface receiving processing on data packets or frames delivered from the BS equipment and then deliver the processed data packets or frames to optical transmission processing units, and perform a wired interface transmission processing on data packets or frames delivered from the optical transmission processing units and then deliver the processed data packets or frames to the BS equipment;

the optical transmission processing units, interconnected with the OLT of the OAN at the reference point a via an optical cable, and adapted to convert data packets or frames delivered from the wired interface units into an optical transmission mode and then deliver the data packets or frames in the optical transmission mode to the OLT, and convert data packets or frames delivered from the OLT into an electrical transmission mode and then deliver the data packets or frames in the electrical transmission mode to the wired interface units.

13. The system according to claim 12, wherein the ONU/ONT equipment further comprises:

a switching unit, adapted to exchange data packets or frames between each wired interface unit and each optical transmission processing unit.

14. A system for an interconnection between a BS and a wired network, comprising:

a BS equipment, integrated with functions of an ONU/ONT, connected to an ODN and an OLT equipment, and adapted to accomplish radio access processing of a wireless subscriber, process data packets or frames of the accessed wireless subscriber and then deliver the processed data packets or frames to the OLT equipment, and perform a base station control processing on data packets or frames from the OLT equipment and then output the processed data packets or frames to the wireless subscriber.

15. The system according to claim 14, wherein the BS equipment further comprises:

physical layer processing units, adapted to accomplish an access of a wireless subscriber, deliver data packets or frames of the accessed wireless subscriber to a base station controller (BSC) processing unit, and deliver data packets or frames delivered from the BSC processing unit to the wireless subscriber;

the BSC processing unit, adapted to perform an uplink base station control processing on data packets or frames delivered from the base station wireless physical layer processing units and then deliver the processed data packets or frames to optical transmission processing units or transmit the processed data packets or frames back to the base station wireless physical layer processing units, and perform a downlink base station control processing on data packets or frames delivered from the optical transmission processing units and then deliver the processed data packets or frames to the base station wireless physical layer processing units, wherein the BSC processing unit comprises at least one processing unit, and each processing unit comprises a wireless data link layer processing module or comprises a wireless data link layer processing module and a processing module of layers over the wireless data link layer; and

the optical transmission processing units, adapted to interconnect the ODN with the OLT via an optical cable, and adapted to convert data packets or frames from the BSC processing unit into an optical transmission mode and then deliver the data packets or frames in the optical transmission mode to the OLT, and convert data packets or frames from the OLT into electrical signals and then deliver the electrical signals in the electrical signals to the BSC processing unit.

16. A system for an interconnection between a BS and a wired network, comprising:

a BS equipment, connected to cable modem (CM) equipments of a fiber/coaxial cable hybrid network access network (DOCSIS) at a reference point CMCI, and adapted to accomplish radio access processing of a wireless subscriber, perform a base station control processing on data packets or frames of the accessed wireless subscriber and then deliver the processed data packets or frames to the CM equipments, and perform the base station control processing on data packets or frames delivered from the CM equipments and then output the processed data packets or frames to the wireless subscriber; and

the CM equipments, connected to the BS equipment and cable modem terminal system (CMTS) equipments of the DOCSIS network, and adapted to perform a DOCSIS modulation on data packets or frames from the BS equipment and then deliver the modulated data packets or frames to the CMTS equipments, and perform a DOCSIS demodulation on data packets or frames from the CMTS equipments and then deliver the demodulated data packets or frames to the BS equipment.

17. The system according to claim 16, wherein the BS equipment comprises:

physical layer processing units, adapted to accomplish an access of a wireless subscriber, deliver data packets or frames of the accessed wireless subscriber to a base station controller (BSC) processing unit, and deliver data packets or frames delivered from the BSC processing unit to the wireless subscriber, wherein the physical layer processing units comprise at least one processing unit, and each processing unit comprises an antenna, a radio frequency (RF) processing module, an intermediate frequency processing module, and a base band processing module;

the BSC processing unit, adapted to perform an uplink base station control processing on data packets or frames delivered from the base station wireless physical layer processing units and then deliver the processed data packets or frames to base station wired interface units or transmit the processed data packets or frames back to the base station wireless physical layer processing units, and perform a downlink base station control processing on data packets or frames delivered from the base station wired interface units and then deliver the processed data packets or frames to the base station wireless physical layer processing units, wherein the BSC processing unit comprises at least one processing unit, and each processing unit comprises a wireless data link layer processing module or comprises a wireless data link layer processing module and a processing module of layers over the wireless data link layer; and

the base station wired interface units, connected to the CM equipments, and adapted to perform a wired interface transmission processing on data packets or frames delivered from the BSC processing unit and then deliver the data packets or frames to the CM equipments, and perform a wired interface receiving processing on data packets or frames delivered from the CM equipments and then deliver the data packets or frames to the BSC processing unit.

18. The system according to claim 16, wherein the CM equipments comprise:

wired interface units, connected to the BS equipment via one or more pairs of wired cables, and adapted to perform a wired interface receiving processing on data packets or frames delivered from the BS equipment and then deliver the processed data packets or frames to cable modem (CM) units, and perform a wired interface transmission processing on data packets or frames delivered from the CM units and then deliver the processed data packets or frames to the BS equipment; and

the CM units, interconnected with the CMTS equipment of the DOCSIS network at the reference point CMCI via one or more pairs of coaxial cables, and adapted to perform a DOCSIS modulation on data packets or frames delivered from the wired interface units and then deliver the modulated data packets or frames to the CMTS equipments of the DOCSIS network, and perform a DOCSIS demodulation on data packets or frames delivered from the CMTS equipments and then deliver the demodulated data packets or frames to the wired interface units, wherein the CM units comprise one or more cable modem units.

19. A system for an interconnection between a BS and a wired network, comprising:

a BS equipment, connected to a CMTS equipment of a DOCSIS network at a reference point CMRFI, and adapted to accomplish radio access processing of a wireless subscriber, perform a base station control processing on data packets or frames of the accessed wireless subscriber and then deliver the processed data packets or frames to the CMTS equipment, and perform the base station control processing on data packets or frames delivered from the CMTS equipment and then output the processed data packets or frames to the wireless subscriber; and

the CMTS equipment, connected to the BS equipment and a managed IP network respectively, and adapted to perform a DOCSIS demodulation on data packets or frames delivered from the BS equipment and then deliver the demodulated data packets or frames to the managed IP network, and perform a DOCSIS modulation on data packets or frames delivered from the managed IP network and then deliver the modulated data packets or frames to the BS equipment.

20. The system according to claim 19, wherein

if the system supports a Layer 3 routing, a wired interface unit of the CMTS equipment supports processing on IP layer, data link layer, and physical layer;

if the system supports a Layer 2 bridging, the wired interface unit of the CMTS equipment supports processing on data link layer and physical layer.