| 摘要 |
The invention relates to a method and arrangement for establishing a connection between a base station and mobile station. The invention is especially applicable to digital TDMA (Time Division Multiple Access) and CDMA (Code Division Multiple Access) cellular systems which use extended cell operating ranges. An idea of the invention is that when establishing a connection a mobile station transmits access bursts using a preferably extended timing advance different from zero. In one embodiment, different timing advance values are used until a timing advance is found with which the burst falls on a CCCH channel time slot at the base station. The mobile station preferably transmits the first bursts using the normal timing advance, the next bursts using a second timing advance, the corresponding timing advance parameter value being the normal timing advance parameter maximum value+1, and the subsequent bursts using a timing advance of 2xthe second timing advance, etc. This goes on until a response message arrives from the base station or until the mobile station has gone through the whole legal timing advance range. Using the solution according to the invention, extended cells can be realized without substantially reducing the data transmission capacity of cells. |
