Node for a radio access network

Patent metadata

Field	Value
Publication number	US-8989816-B2
Application number	US-201013389495-A
Country	US
Kind code	B2
Filing date	Aug 13, 2010
Priority date	Sep 21, 2009
Publication date	Mar 24, 2015
Grant date	Mar 24, 2015

Abstract

It is disclosed a node of a radio access network. The node comprises an access device having a transceiver suitable for exchanging upstream and downstream traffic with a plurality of terminals located in a coverage area thereof, a digital unit suitable for performing base-band processing of the upstream and downstream traffic, and a traffic link connecting the transceiver and the digital unit. The node further comprises a backhauling apparatus having an outdoor unit suitable for exchanging the upstream and downstream traffic with a further node of the radio access network by means of a point-to-point microwave connection. The transceiver is connected to the outdoor unit by means of a backhauling link. The digital unit of the access device and the outdoor unit of the backhauling apparatus are configured to exchange the upstream and downstream traffic through the traffic link, the transceiver and the backhauling link.

First claim

The invention claimed is:

1. A node of a radio access network, said node comprising:
an access device having a transceiver suitable for exchanging upstream traffic and downstream traffic with a plurality of terminals located in a coverage area of said access device, a digital unit suitable for performing base-band processing of said upstream traffic and said downstream traffic, and a traffic link connecting said transceiver and said digital unit; and
a backhauling apparatus having an outdoor unit suitable for exchanging said upstream traffic and said downstream traffic with a further node of said radio access network by means of a point-to-point microwave connection;
wherein said transceiver is connected to said outdoor unit by means of a backhauling link; and
wherein said digital unit is configured to exchange said upstream traffic and said downstream traffic with said outdoor unit through said traffic link, said transceiver and said backhauling link; and
wherein said digital unit comprises a backhauling interface suitable for directly connecting said digital unit to said backhauling apparatus, and wherein said digital unit is configured to short-circuit said backhauling interface so that said upstream traffic is received at a component of said digital unit for processing.

2. The node according to claim 1 , wherein said digital unit is configured to split said upstream traffic in upstream packets and transmit said upstream packets to said outdoor unit through said traffic link, said transceiver and said backhauling link.

3. The node according to claim 2 , wherein said outdoor unit is configured to receive said upstream packets and to perform routing functions on said upstream packets.

4. The node according to claim 3 , wherein said outdoor unit is configured to
receive said downstream traffic from said further node in the form of downstream packets,
perform routing functions on said downstream packets, and
forward said downstream packets to said digital unit through said backhauling link, said transceiver and said traffic link.

5. The node according to claim 4 , wherein said digital unit is configured to receive said downstream packets and to recover said downstream traffic from said downstream packets.

6. The node according to claim 1 , wherein said transceiver comprises a further backhauling interface and said outdoor unit comprises a still further backhauling interface, said backhauling link connecting said further backhauling interface and said still further backhauling interface.

7. The node according to claim 6 , wherein said further backhauling interface and said still further backhauling interface are Gigabit Ethernet interfaces.

8. The node according to claim 6 , wherein said backhauling link is a fiber optic link or a coaxial link.

9. The node according to claim 1 , wherein said access device further comprises:
a power supply line connecting said digital unit and said transceiver for supplying said transceiver,
a branching unit on said power supply line, and
a further power supply line connecting said branching unit and said outdoor unit for supplying said outdoor unit.

10. The node according to claim 1 , wherein said traffic link is a fiber optic link or a coaxial link.

11. A radio access network comprising a node, said node comprising:
an access device having a transceiver suitable for exchanging upstream traffic and downstream traffic with a plurality of terminals located in a coverage area of said access device, a digital unit suitable for performing base-band processing of said upstream traffic and said downstream traffic, and a traffic link connecting said transceiver and said digital unit; and
a backhauling apparatus having an outdoor unit suitable for exchanging said upstream traffic and said downstream traffic with a further node of said radio access network by means of a point-to-point microwave connection;
wherein said transceiver is connected to said outdoor unit by means of a backhauling link; and
wherein said digital unit is configured to exchange said upstream traffic and said downstream traffic with said outdoor unit through said traffic link, said transceiver and said backhauling link; and
wherein said digital unit comprises a backhauling interface suitable for directly connecting said digital unit to said backhauling apparatus, and wherein said digital unit is configured to short-circuit said backhauling interface so that said upstream traffic is received at a component of said digital unit for processing.

12. A method for processing upstream traffic at a node of a radio access network, said method comprising the steps of:
a) collecting, at an access device of said node, upstream traffic from a plurality of terminals located in a coverage area of said access device by means of a transceiver;
b) forwarding said upstream traffic from said transceiver to a digital unit of said access device through a traffic link connecting said transceiver and said digital unit;
c) performing, at said digital unit, base-band processing of said upstream traffic;
d) forwarding said upstream traffic from said digital unit to an outdoor unit of a backhauling apparatus of said node through said traffic link, said transceiver and a backhauling link connecting said transceiver and said outdoor unit; and
e) transmitting, at said outdoor unit, said upstream traffic to a further node of said radio access network by means of a point-to-point microwave connection;
wherein said digital unit comprises a backhauling interface suitable for directly connecting said digital unit to said backhauling apparatus, and wherein said digital unit is configured to short-circuit said backhauling interface so that said upstream traffic is received at a component of said digital unit for processing.

13. The method according to claim 12 , wherein said step d) comprises splitting, at said digital unit, said upstream traffic in upstream packets and transmitting them on said traffic link.

14. A method for processing downstream traffic at a node of a radio access network, said method comprising the steps of:
a′) receiving, at an outdoor unit of a backhauling apparatus of said node, said downstream traffic from a further node of said radio access network by means of a point-to-point microwave connection;
b′) forwarding said downstream traffic from said outdoor unit to a digital unit of an access device of said node through a backhauling link connecting a transceiver and said outdoor unit, said transceiver and a traffic link;
c′) performing, at said digital unit, base-band processing of said downstream traffic;
d′) forwarding said downstream traffic from said digital unit to said transceiver of said access device through said traffic link connecting said transceiver and said digital unit; and
e′) distributing, at said access device, said downstream traffic to a plurality of terminals located in a coverage area of said access device by means of said transceivers,
wherein said digital unit comprises a backhauling interface suitable for directly connecting said digital unit to said backhauling apparatus, and wherein said digital unit is configured to short-circuit said backhauling interface so that said downstream traffic is received at a component of said digital unit for processing.

15. The method according to claim 14 , wherein said step b′) comprises receiving, at said digital unit, downstream packets and recovering said downstream traffic from said downstream packets.

Assignees

• Barzaghi Giorgio
• Davant Fred
• Mirelli Giacomo
• Alcatel Lucent

Inventors

• Barzaghi Giorgio
• Davant Fred
• Mirelli Giacomo

Classifications

• H04W92/12

  between access points and access point controllers · CPC title

• H04W92/20 Primary

  between access points · CPC title

• H04W88/085

  Access point devices with remote components · CPC title

• H04L69/32 Primary

  Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level · CPC title

• H04W88/08

  Access point devices · CPC title