osmo-bts - Osmocom BTS-Side code (Abis, scheduling)

Age	Commit message (Collapse)	Author	Files	Lines
2021-01-08	power_control: use more reasonable reduce step size	Vadim Yanitskiy	1	-4/+0
	It makes more sense to use a reduce step size that is smaller than the increase step size. This way both MS/BS power control loops would be able to react quickly of the signal gets weaker, while the good signal would not trigger radical power reduction. Change-Id: Ie358fd828a68bfa1d23559197e8df8478fb4535e Related: SYS#4918
2020-12-09	power_control: make raise/lower step limitation configurable	Vadim Yanitskiy	1	-0/+4
	Change-Id: Ic37742f46f533865043b3dbcf16ea702e1746f98 Related: SYS#4918
2020-12-06	power_control: implement BS (Downlink) Power Control	Vadim Yanitskiy	1	-0/+3
	We already have MS Power Control, which according to 3GPP 45.008 shall be implemented in the MS to minimize the transmit power in the Uplink direction. The BS Power Control may optionally be implemented by the network side for the same purpose. Using Downlink signal measurements reported by the MS, the BSS (either BSC, or BTS) may control Downlink attenuation in a way that the transmit power remains as low as possible, or remains in a specific range corresponding to good RxLev values on the MS side. This change implements autonomous BS Power Control, that can optionally be enabled by the BSC. BS Power Control re-uses parts of the MS Power Control code, so all parameters can be configured in the same way - via the VTY interface or a configuration file. This basically means that features like hysteresis and EWMA based filtering are also available for BS Power Control. The only difference is that RxQual values higher than 0 would trigger the logic to reduce the current attenuation twice. Note that one of the unit tests ('TC_rxlev_max_min') fails, as the power step limitations for raising and lowering look wrong to me, and the related discussion is still ongoing. Change-Id: I5b509e71d5f668b6b8b2abf8053c27f2a7c78451 Related: SYS#4918
2020-10-15	power_control: clarify argument names of lchan_ms_pwr_ctrl()	Vadim Yanitskiy	1	-1/+2
	Change-Id: I821120bf5c3690f5b4c6b96c879e675b3d271c90
2015-09-22	move MS power control handling from sysmobts to common part	Harald Welte	1	-0/+7
	MS uplink power control is required in pretty much any BTS, and we cannot assume that they PHY / L1 will always take care of it by itself. So the correspondign code is moved to common/power_control.c and called from the generic part of L1SAP. The corresponding VTY paramter has been moved from the sysmobts-specific trx VTY node to the common BTS VTY node.