IMPLICIT ADDRESSING FOR SPORADIC MACHINE-TYPE ACCESS
An apparatus and method for detecting an implicit user ID of a received data packet is disclosed. When a data packet is received, at least one frequency on which the data packet has been received is determined. Further, a spreading code sequence of the data packet is determined, and the at least one determined frequency and the determined spreading code sequence are used to determine an implicit user ID of the data packet.
1 . Method for detecting an implicit user ID of a received data packet, comprising:
receiving a data packet,
determining at least one transmission parameter of the user data of the received data packet, and
determining an implicit user ID of the data packet in dependence of the at least one determined transmission parameter.
2 . Method for detecting an implicit user ID according to claim 1 , wherein the determining at least one transmission parameter comprises:
determining a spreading code sequence of the received data packet.
3 . Method for detecting an implicit user ID according to claim 2 , wherein the spreading code sequence determined is a tree structure spreading code sequence.
4 . Method for detecting an implicit user ID according to claim 1 , wherein the determining at least one transmission parameter comprises:
determining at least one frequency on which the data packet has been received.
5 . Method for detecting an implicit user ID according to claim 1 , wherein the data packet is received via a multi-carrier transmission system.
6 . Method for detecting an implicit user ID according to claim 4 , wherein the determined at least one frequency corresponds to a physical resource block, a set of physical resource blocks or a hopping pattern across a set of physical resource blocks.
7 . Method for detecting an implicit user ID according to claim 1 , wherein the data packet is received via an SC-FDMA or a DFT-precoded OFDM transmission system.
8 . Method for detecting an implicit user ID according to claim 5 , wherein the data packet is received via an OFDM or an FBMC transmission system.
9 . Method for detecting an implicit user ID according to claim 1 , wherein the determining at least one transmission parameter comprises:
determining the spatial signature of the received data packet in a multi-antenna receiver.
10 . Method for detecting an implicit user ID according to claim 1 , wherein the determining at least one transmission parameter comprises:
determining the power level of the received data packet.
11 . Method for detecting an implicit user ID according to claim 1 , further comprising:—comparing the determined transmission parameters of the received data packet with stored characteristics of user equipment devices registered, the characteristics of devices registered being stored in a look-up table.
12 . Method for detecting an implicit user ID according to claim 1 , further comprising:
assigning characteristics to the user equipment devices by forward control signaling or higher layer control signaling.
13 . Method for detecting an implicit user ID according to claim 1 , further comprising:
determining an explicit address of the received data packet, and
combining the implicit user ID and the explicit address to identify the origin of the data packet.
14 . Apparatus for receiving a data packet in a transmission system, wherein the apparatus performs a method according to claim 1 .
15 . Transmission system for sending a data packet from a sender to a receiver, wherein the transmission system comprises at least one apparatus for sending a data packet, the apparatus for sending the data packet applies a spreading code sequence for coding the data packet to be sent and the transmission system further comprises at least one apparatus for receiving a data packet according to claim 14 .