| 摘要 |
A method for enhancing Slow Associated Control CHannel(SACCH)) erformance, which includes steps of: if a user that uses a half-rate Traffic CHannel(TCH) is contained in a coupled user group, a base station instructing the user on an Adaptive Multi-user channels on One Slot VAMOS sub-channel to use a half-rate sub-channel 0 and a half-rate sub-channel 1 alternately; if a current 26-multiframe is an even frame in an SACCH cycle, the user on the VAMOS sub-channel delivering a TCH frame and an SACCH frame over the originally allocated half-rate sub-channel; if the current 26-multiframe is an odd frame in an SACCH cycle, the user on the VAMOS sending the TCH frame and the SACCH frame after exchanging his/her own half-rate sub-channels; and a reception side performing demodulation and deciphering after receiving its own information. This invention also includes another method for enhancing SACCH performance, which can significantly improve the error tolerance of the SACCH using the method of retransmitting the SACCH when the TCH is in the DTX state and does not need to send any information. According to the present invention, the code error rate of the SACCH can be decreased and the SACCH performance can be enhanced, thus realizing the object of improving the system capacity. |
