Method, mobile exchange, and subscriber station in a mobile radio system for establishing a high-priority call

PCT No. PCT/FI94/00348 Sec. 371 Date Apr. 12, 1995 Sec. 102(e) Date Apr. 12, 1995 PCT Filed Aug. 11, 1994 PCT Pub. No. WO95/05721 PCT Pub. Date Feb. 23, 1995A method, mobile exchange, and subscriber station for establishing a high-priority individual call or group call to at least one subscriber (MS1-MS4) in a mobile radio system participating in a first group call conducted on a given channel. To establish a high-priority call on said channel, a release message provided with an identifier of the subscriber (MS4) participating in the first group call to whom it is desired to establish a high-priority individual call or high-priority group call and/or an identifier of the high-priority individual call or high-priority group call to be established is sent (405) on said channel to all subscribers (MS1-MS4) engaged in the first group call; the subscribers (MS1-MS4) engaged in the first group call receive said release message; said subscriber (MS4) to whom it is desired to establish a high-priority individual call or high-priority group call detects (503, 507) on the basis of said identifier included in the release message received that the release message is intended for said subscriber (MS4); said subscriber (MS4) terminates (506) his engagement in the group call; said subscriber (MS4) joins said high-priority call on the basis of the high-priority call identifier received.