SRS bursts through MAC-CE enhancement
AssigneeNokia Technologies Oy
InventorsArman Ahmadzadeh, Silvio Mandelli, Marcus Roland Henninger
Life of this patent
Estimating the term…
Abstract
An apparatus includes at least one processor and at least one memory. The at least one memory stores instructions that, when executed by the at least one processor, cause the apparatus to: receive a medium access control (MAC)-control element (CE) message; determine a sensing signal burst configuration based on the MAC-CE message, the sensing signal burst configuration including at least one of a burst periodicity or a burst length of a signal burst; and transmit the sensing signal burst according to the sensing signal burst configuration.
Claims3
A user equipment configured to sense automated guided vehicles in an indoor factory, the user equipment comprising:
- at least one processor;
- and
- at least one memory storing instructions that, when executed by the at least one processor, cause the user equipment at least to:
- receive, from a base station, a medium access control (MAC)-control element (CE) message, wherein the MAC-CE message is a semi-persistent (SP) sounding reference signal (SRS) Activation/Deactivation MAC-CE message, and wherein the MAC-CE message includes two burst configuration bits;
- receive, from the base station, a radio resource control (RRC) configuration message comprising a value of a PeriodicityAndOffset parameter;
- determine a first sensing signal burst configuration based on the value of the PeriodicityAndOffset parameter and based on the two burst configuration bits in the MAC-CE message, the determining the first sensing signal burst configuration comprising:
- determining a first burst periodicity as the value of the PeriodicityAndOffset parameter,
- accessing a mapping which maps different values of the two burst configuration bits to different values of a factor,
- determining a value k of the factor based on the mapping and based on a value of the two burst configuration bits, and
- determining a first burst length of a sensing signal burst by an equation M×Bk, where
- M is a configurable value configured at a SP scheduling (SPS) configuration, and
- B is a fixed value configured at the SPS configuration;
- transmit the first sensing signal burst according to the sensing signal burst configuration by transmitting a first plurality of pilot symbols at the first burst periodicity over the first burst length, wherein the first sensing signal burst is an SRS transmission;
- receive a second sensing signal burst, transmitted by another user equipment, according to a second sensing signal burst configuration, the second sensing signal burst comprising a second plurality of pilot symbols transmitted at a second burst periodicity over a second burst length;
- determine a Doppler shift based on the second sensing signal burst;
- and
- determine a speed of an automated guided vehicle of the indoor factory based on the Doppler shift.
Dependencies are inferred from the claim text.