Method and radio communications system for transmitting data in a mobile radio network

• US 6,381,461 B1
• Filed: 04/24/2000
• Issued: 04/30/2002
• Est. Priority Date: 10/23/1997
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Besson, Marcus, Kammerlander, Karl, Neyen, Hans Von Der
• Primary Examiner(s): Trost, William
• Assistant Examiner(s): PEREZ GUTIERREZ, RAFAEL
• Application Number:
  US09/556,661
• Time in Patent Office: 736 Days
• Field of Search: 455/561, 455/452, 455/511, 455/512, 455/509, 455/450, 455/448, 455/562, 370/329, 370/330, 370/331, 370/335, 370/336, 370/337, 370/342, 370/343, 370/344, 370/345, 370/347, 370/441, 370/442, 370/478, 370/479, 370/480
• US Class Current: 455/450
• CPC Class Codes: H04W 36/06 Reselecting a communication resource in the serving access point
• CPC Class Codes: H04W 36/1443 between licensed networks
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

In a GSM mobile radio network having at least one base station controller and a first base station, at least one first frequency channel is made available within a frequency band between the first base station and the mobile stations in order to transmit data and to transmit signaling information. According to the invention, the first base station additionally makes available a second broadband frequency channel with a TD/CDMA transmission method. After a connection has been set up in the first or second frequency channel, a handover of the connection to the respective other frequency channel is carried out by the base station controller without a second base station being selected.

Claims

1. A radio communications system organized in radio cells, comprising:

a base station assigned to a radio cell of the radio communications system, said base station being designed to transmit data in a first mobile radio standard in a first frequency channel;

said base station having at least one transmitter/receiver device for a second frequency channel with a transmission method according to a second mobile radio standard; and

said base station signaling, via an organization channel for transmitting signaling information with a transmission method according to the first mobile radio standard, the standards supported in the radio cell and being designed to subsequently selectively set-up a connection in one of said first frequency channel and said second frequency channel.

2. The radio communications system according to claim 1, wherein said organizational channel is transmitted over an entire surface of the radio cell.

3. The method according to claim 1, which further comprises transmitting the organizational channel over an entire surface of the radio cell.

4. A method of transmitting data in a mobile radio network having a first base station assigned to a radio cell, which comprises the following steps:

making available, with a first base station assigned to a radio cell, a first frequency channel for data transmission and an organization channel for transmitting signaling information with a transmission method according to a first mobile radio standard;

additionally making available, with the first base station, a second frequency channel with a transmission method according to a second mobile radio standard;

signaling via the organization channel of the first mobile radio standard the standards supported in the radio cell; and

subsequently selectively setting-up a connection in one of the frequency channels.

5. The method according to claim 4, which comprises implementing the first frequency channel and the second frequency channel by means of different transmitter/receiver devices of the first base station, and using further modules commonly.

6. The method according to claim 4, which comprises, in a handover of a connection and for a connection setup, interrogating a desired data rate and selecting the first frequency channel or the second frequency channel accordingly.

7. The method according to claim 4, which comprises implementing the first frequency channel and the second frequency channel in a common transmitter/receiver device of the first base station.

8. The method according to claim 4, which comprises handing over the connection to the respectively other frequency channel without selecting a second base station.

9. The method according to claim 4, which comprises handing over connections from a second base station without TD/CDMA compatibility with a preference to the first base station.

10. The method according to claim 4, wherein the first mobile radio standard is a GSM standard and the second mobile radio standard is a third generation mobile radio standard.

11. The method according to claim 4, wherein, during a connection, when services are being additionally used, handing over the connection to the second frequency channel .

12. The method according to claim 4, wherein the first and second frequency channels are implemented in the same frequency band, but in different timeslots.

13. The method according to claim 12, which comprises controlling, with a base station controller, a distribution of a plurality of connections among the timeslots such that a handover of a connection to a respectively other transmission method is carried out as soon as a ratio of the mobile station with TD/CDMA compatibility to other mobile stations within a radio environment reaches a second threshold value.

14. The method according to claim 12, which comprises controlling, with a base station controller, a distribution of a plurality of connections among the timeslots such that a handover of a connection to the respective other transmission method takes place as soon as a utilization capacity of a timeslot drops below a first threshold value.

15. The method according to claim 12, which comprises controlling, with a base station controller, a distribution of a plurality of connections among the timeslots such that a timeslot of a TDMA or TD/CDMA transmission method is handed over for the respective other transmission method.

16. The method according to claim 4, which comprises utilizing the signaling information of the first frequency channel for handing over connections.

17. The method according to claim 4, which comprises utilizing the signaling information of the first frequency channel for setting up connections.

18. The method according to claim 4, wherein the frequency bands of the first and second frequency channels overlap.