Conference articles (2)
J. Kurjenniemi, O. Lehtinen and T. Ristaniemi, “Downlink Power Control of Dedicated Channels in UTRA TDD“, Proc. of the IEEE Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Lisbon, Portugal, September 15-18, 2002.
This paper discusses downlink power control of dedicated channels in UTRA TDD. The current UTRA TDD downlink power control is similar to the one in UTRA FDD mode, that comprises of closed inner loop and quality based outer loop.
However, due to the time division feature and associated flexibility with asymmetry of TDD, the inner loop can not operate as fast as in FDD and it is affected by rapid changes in environment.
Therefore, the effect of downlink power control of dedicated channel inner loop algorithm to the performance of UTRA TDD network is studied in this paper. A dynamic system level simulator is used for this purpose.
J. Kurjenniemi, O. Lehtinen and T. Ristaniemi, “Signaled Step Size for Downlink Power Control of Dedicated Channels in UTRA TDD“, Proc. of the IEEE Conference on Mobile and Wireless Communications Networks, Stockholm, Sweden, September 9-11, 2002.
This paper discusses downlink inner loop power control in UTRA TDD.
The current UTRA TDD downlink power control is similar to one in UTRA FDD mode, but due to the time division feature of TDD it can not operate as fast as in FDD and it is affected by rapid changes in environment.
In this paper an improvement for the downlink inner loop power control algorithm is presented in which the power control step size is based on the difference between UE measured SIR and target SIR. This difference is then signaled from UE to UTRAN.
Since the effectiveness of this algorithm depends on available signaling bandwidth that is used, dynamic system simulations are carried out to find out how many bits are needed for the signaling and how this algorithm is affected by signaling and measurement errors.
