Method for measuring adjacent areas
The present invention discloses a method for measuring adjacent cells, and the method is used for measuring adjacent cells by using dormant idle sub-frames to receive specified data from a network side in an idle state, and adjacent cells are measured by using an idle window to receive the specified data from the network side in a connection state. The present invention realizes measurement of the TD-SCDMA adjacent cells in a WCDMA mode and measurement of the WCDMA adjacent cells in a TD-SCDMA mode; and further more achieves reselection and switching from WCDMA to TD-SCDMA adjacent cell and from the TD-SCDMA to WCDMA adjacent cell on this basis, meets a real-time requirement effectively, and has high practical value.
1. A method for measuring power of adjacent cells, comprising the step of:
measuring Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) adjacent cells in a Wideband Code Division Multiple Access (WCDMA) mode when TD-SCDMA timing has not been obtained, wherein a terminal in an idle state uses dormant idle WCDMA sub-frames to receive data of TD-SCDMA adjacent cells specified by a network side so as to measure the TD-SCDMA adjacent cells, and in a connection state uses an idle window of the WCDMA subframes to receive the data of TD-SCDMA adjacent cells specified by the network side so as to measure the TD-SCDMA adjacent cells, said method further comprising the following steps A-C;
step A, receiving the data of the TD-SCDMA adjacent cells, performing automatic gain control adjustment and coarse synchronization adjustment of frequency points of the TD-SCDMA adjacent areas, thereby obtaining a stable automatic gain control value of one frequency point, and the success of the coarse synchronization of the frequency point;
step B, receiving data relevant to a downlink synchronization code according to a coarse synchronization position, finding out a position where a relevant peak is the highest which is to be used as a TD-SCDMA timing, and determining an observation time difference of all the TD-SCDMA adjacent cells with respect to the TD-SCDMA timing under the frequency point; and
step C, receiving data in the 0th time slot relevant to a training sequence code under the frequency point according to the TD-SCDMA timing, which is for determining a received signal code power of the TD-SCDMA adjacent cells whose observation time difference has been obtained, wherein the present step is performed three times and an average value of the measurements of the received signal code powers of the three times is reported to the network side.
2. The method according to claim 1 , wherein the idle window is formed in a compress mode; the pattern of the compress mode is specified by the network side, particularly comprising: the number, the position and the length of the idle window, and the number of TD-SCDMA frames using the idle window.
3. The method according to claim 1 , wherein, in step A, if the coarse synchronization of all the frequency points of the TD-SCDMA adjacent cells cannot succeed, the terminal reports to the network side the minimum value as the received signal code powers of all the TD-SCDMA adjacent cells.
4. The method according to claim 1 , wherein, in step A, performing coarse synchronization to one frequency point of the TD-SCDMA adjacent cells requires receiving data of the TD-SCDMA adjacent cells once.
5. The method according to claim 4 , wherein the amount of the data of the TD-SCDMA adjacent cells is: received with a length of 1 frame plus 128 chips at every time.
6. A method for measuring power of adjacent cells, comprising the step of:
measuring Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) adjacent cells in a Wideband Code Division Multiple Access (WCDMA) mode when TD-SCDMA timing has not been obtained, wherein a terminal in an idle state uses dormant idle WCDMA sub-frames to receive data of TD-SCDMA adjacent cells specified by a network side so as to measure the TD-SCDMA adjacent cells, and in a connection state uses an idle window of the WCDMA subframes to receive the data of TD-SCDMA adjacent cells specified by the network side so as to measure the TD-SCDMA adjacent cells, said method further comprising the following steps a-c;
step a, receiving the data of the TD-SCDMA adjacent cells, performing automatic gain control adjustment of one frequency point of the TD-SCDMA adjacent cells, thereby obtaining a stable automatic gain control value of the frequency point;
step b, receiving data relevant to a downlink synchronization code, and determining an observation time difference of all the TD-SCDMA adjacent cells with respect to the TD-SCDMA timing under the frequency point; and
step c, receiving data in the 0th time slot relevant to a training sequence code under the frequency point according to the TD-SCDMA timing, which is for determining a received signal code power of the TD-SCDMA adjacent cells whose observation time difference has been obtained, wherein steps b-c are performed three times and an average value of the measurements of received signal code powers of the three times is reported to the network side.
7. The method according to claim 6 , wherein the idle window is formed in a WCDMA compress mode; the pattern of the compress mode is specified by the network side, particularly comprising: the number, the position and the length of the idle window, and the number of TD-SCDMA frames using the idle window.