Telecommunication network using the W-CDMA protocol with AAL-2 based termination points
View Patent ↗A telecommunication network using the W-CDMA protocol comprising a variety of base stations (BS) communicating with a central Radio Network Controller (RNC) by an asynchronous transfer mode (ATM) based data connection via an IUB interface, whereby at least one of the base stations (BS) is comprises a variety of radio sectors ( 1, 2, 3 , . . . n) with physically distributed AAL-2 based termination points (TP), each termination point having an AAL-2 over ATM structure where different call ID's are mapped into respective ATM virtual connections (ATM/VC) under the control of a control unit timer (CU-timer) having a determined delay time, and all AAL-2 cell streams being sent parallel to each other to an ATM switching unit via a UTOPIA interface. In order to increase the efficiency of the system without a reduction of the maximum allowed delay, the ATM switching unit comprises a multiplexing unit (AAM CPS MUX) for multiplexing AAL-2 connections of the different termination points (TP) into one single ATM virtual connection to be processed by the ATM switch.
1. A system, comprising:
a plurality of base stations communicating with a radio network controller by an asynchronous transfer mode based data connection, at least one of the plurality of base stations comprising a plurality of radio sectors having physically distributed asynchronous transfer mode adaptation layer 2 based termination points, each termination point having an asynchronous transfer mode adaptation layer 2 over asynchronous transfer mode structure for mapping different call ID's into an asynchronous transfer mode adaptation layer 2 cell stream of a single asynchronous transfer mode virtual connection under control of a control unit timer having a determined delay time; and
an asynchronous transfer mode switching unit configured to receive all asynchronous transfer mode adaptation layer 2 cell streams sent parallel to each other from said termination points,
wherein said asynchronous transfer mode switching unit comprises a multiplexer configured to multiplex said received asynchronous transfer mode adaptation layer 2 cell streams into a single asynchronous transfer mode virtual connection to be processed by an asynchronous transfer mode switch, and wherein a control unit timer used in said multiplexer has a larger value than a control unit timer used for said asynchronous transfer mode adaptation layer 2 cell streams.
2. The system of claim 1 , wherein channels respectively corresponding to said termination points have different bandwidths.
3. The system of claim 1 , wherein the multiplexer has a switchable bypass line.
4. The system of claim 3 , wherein the multiplexer is a plug-in type unit.
5. An apparatus, comprising:
a receiver configured to receive all asynchronous transfer mode adaptation layer 2 cell streams of respective asynchronous transfer mode virtual connections sent parallel to each other from physically distributed asynchronous transfer mode adaptation layer 2 based termination points of a plurality of radio sectors of a base station, wherein said base station is a base station out of a plurality of base stations configured to communicate with a radio network controller by an asynchronous transfer mode based data connection, and wherein each asynchronous transfer mode adaptation layer 2 cell stream contains different call IDs mapped into the asynchronous transfer mode adaptation layer 2 cell stream, in which said different call IDs are contained, under the control of a control unit timer, and
a multiplexer configured to multiplex said received asynchronous transfer mode adaptation layer 2 cell streams into a single asynchronous transfer mode virtual connection to be processed by an asynchronous transfer mode switch, wherein a control unit timer used in said multiplexer has a larger value than a control unit timer used for said asynchronous transfer mode adaptation layer 2 cell streams.
6. A method, comprising:
receiving all asynchronous transfer mode adaptation layer 2 cell streams of respective asynchronous transfer mode virtual connections sent parallel to each other from physically distributed asynchronous transfer mode adaptation layer 2 based termination points of a plurality of radio sectors of a base station, wherein said base station is a base station out of a plurality of base stations configured to communicate with a radio network controller by an asynchronous transfer mode based data connection, and wherein each asynchronous transfer mode adaptation layer 2 cell stream contains different call IDs mapped into the asynchronous transfer mode adaptation layer 2 cell stream, in which said different call IDs are contained, under the control of a control unit timer; and
multiplexing said received asynchronous transfer mode adaptation layer 2 cell streams into a single asynchronous transfer mode virtual connection to be processed by an asynchronous transfer mode switch, wherein a control unit timer used in said multiplexing has a larger value than a control unit timer used for said asynchronous transfer mode adaptation layer 2 cell streams.
7. The system of claim 2 , wherein the multiplexer has a switchable bypass line.
8. The apparatus of claim 5 , wherein the multiplexer has a switchable bypass line.
9. The apparatus of claim 5 , wherein the multiplexer is a plug-in type unit.
10. The method of claim 6 , wherein the multiplexing is performed in a multiplexer.
11. The method of claim 10 , wherein the multiplexer has a switchable bypass line.
12. The method of claim 10 , wherein the multiplexer is a plug-in type unit.
13. An apparatus, comprising:
means for receiving all asynchronous transfer mode adaptation layer 2 cell streams of respective asynchronous transfer mode virtual connections sent parallel to each other from physically distributed asynchronous transfer mode adaptation layer 2 based termination points of a plurality of radio sectors of a base station, wherein said base station is a base station out of a plurality of base stations configured to communicate with a radio network controller by an asynchronous transfer mode based data connection, and wherein each asynchronous transfer mode adaptation layer 2 cell stream contains different call IDs mapped into the asynchronous transfer mode adaptation layer 2 cell stream, in which said different call IDs are contained, under the control of a control unit timer, and
means for multiplexing said received asynchronous transfer mode adaptation layer 2 cell streams into a single asynchronous transfer mode virtual connection to be processed by an asynchronous transfer mode switch, wherein a control unit timer used in said multiplexer has a larger value than a control unit timer used for said asynchronous transfer mode adaptation layer 2 cell streams.
14. The apparatus of claim 5 , wherein channels respectively corresponding to said termination points have different bandwidths.
15. The apparatus of claim 14 , wherein the multiplexer has a switchable bypass line.
16. The apparatus of claim 8 , wherein the multiplexer is a plug-in type unit.