Method and device for d2d communication within a cellular radio network

Patent metadata

Field	Value
Publication number	US-2016234045-A1
Application number	US-201415024272-A
Country	US
Kind code	A1
Filing date	Oct 29, 2014
Priority date	Oct 31, 2013
Publication date	Aug 11, 2016
Grant date	—

Abstract

A method of and device for generation and transmission of a first data message over a wireless channel and for a device-to-device enabled cellular communication device arranged to operate with a cellular radio access network. A transmitter identification, ID, of the cellular communication device in the first data message is included. The entire first data message, including at least data associated with the transmitter ID is scrambled with a scrambling sequence associated with a synchronisation source identity. The first data message is transmitted over the wireless channel. A corresponding method of and device for receiving and decoding one or more data messages over a wireless channel and for a device-to-device enabled cellular communication device arranged to operate with a cellular radio access network. A first synchronisation source identity is determined. A received first data message with a scrambling sequence associated with the first synchronisation source identity is descrambled. The received first data message is decoded. A transmission identity, ID, is determined from the first data message.

First claim

1 . A method of generation and transmission of a first data message over a wireless channel and for a device-to-device enabled cellular communication device arranged to operate with a cellular radio access network, the method comprising:
including a transmitter identification, ID, of the cellular communication device in the first data message; scrambling the entire first data message, including at least data associated with the transmitter ID, with a scrambling sequence associated with a synchronization source identity; and transmitting the first data message over the wireless channel.

2 . The method of claim 1 , wherein the synchronization source is a controlling node to which the cellular communication device is associated by the cellular communication device is camping on the controlling node, is served by the camping node or controlled by the controlling node.

3 . The method of claim 1 , wherein the synchronization source is the cellular communication device.

4 . The method of claim 3 , wherein the first data message is transmitted at predetermined frequency/time resources.

5 . The method of claim 1 , wherein the scrambling sequence associated with a synchronization source identity is derived from a Primary Synchronization Source Identity, PSSID.

6 . The method of claim 1 , further comprising
scrambling a checksum associated with the first data message, wherein the scrambling of the checksum is made with a scrambling sequence associated with an identity of a receiver of the first data message; and then performing the scrambling of the entire first message.

7 . The method of claim 6 , wherein the checksum is a cyclic redundancy check.

8 . The method of claim 6 , wherein the identity of the receiver is one of received from the first synchronization source and preconfigured.

9 . The method of claim 1 , further comprising:
scrambling a second data message with a sequence associated with the transmitter ID of the cellular communication device; and transmitting the second data message over the wireless channel.

10 . The method of claim 1 , further comprising, prior to any transmission of the first data message transmitting a synchronization sequence, wherein the synchronization sequence is associated with an identity of the synchronization source.

11 . The method of claim 1 , wherein the first data message is transmitted at frequency/time resources assigned by the synchronization source.

12 . The method of claim 1 , wherein the first data message is a scheduling assignment message for device-to-device communication.

13 . The method of claim 1 , wherein the cellular radio access network is a 3GPP LTE cellular radio access network.

14 . A method of receiving and decoding at least one data message over a wireless channel and for a device-to-device enabled cellular communication device arranged to operate with a cellular radio access network, the method comprising:
determining a first synchronization source identity; descrambling a received first data message with a scrambling sequence associated with the first synchronization source identity. decoding the received first data message; and determining a transmission identity, ID, from the first data message.

15 . The method of claim 14 , where the decoding of the first data message comprises descrambling a checksum with a sequence associated with the receiver identity.

16 . The method of claim 14 , further comprising descrambling a second data message with a scrambling code associated with the determined transmission ID.

17 . The method of claim 14 , wherein the receiver identity is determined from preconfigured capability of the cellular communication device.

18 . The method of claim 14 , wherein the receiver identity is received from a second synchronization source.

19 . The method of claim 18 , wherein the first and second synchronization sources are idem.

20 . The method of claim 14 , further comprising, prior to any reception of the data message or messages, receiving a synchronization sequence, wherein the synchronization sequence is associated with an identity of the first synchronization source, and wherein the determining of the first synchronization source identity is based on the synchronization sequence.

21 . A communication device for operating with a cellular radio access network and enabled for device-to-device communication, the communication device comprising:
a transceiver configured to one of transmit and receive at least one data message over a wireless channel; and a controller configured to one of generate and decode at least one data message by: for encoding:
including a transmitter identification, ID, of the cellular communication device in the at least one data message;
scrambling the entire at least one data message, including at least data associated with the transmitter ID, with a scrambling sequence associated with a synchronization source identify; and
transmitting the at least one data message over the wireless channel; and
for decoding:
determining a first synchronization source identity;
descrambling a received first data message with the scrambling sequence associated with the first synchronization source identity;
decoding the received at least one data message; and
determining the transmitter ID from the at least one data message.

22 . A computer storage medium storing a computer program comprising instructions which, when executed by a processor of a communication device for operating with a cellular radio access network and enabled for device-to-device communication, causes the communication device to perform a method comprising:
for encoding:
including a transmitter identification, ID, of the cellular communication device in the at least one data message;
scrambling the entire at least one data message, including at least data associated with the transmitter ID, with a scrambling sequence associated with a synchronization source identity; and
transmitting the at least one data message over the wireless channel; and
for decoding:
determining a first synchronization source identity;
descrambling a received first data message with the scrambling sequence associated with the first synchronization source identity;
decoding the received at least one data message; and
determining the transmitter ID from the at least one data message.

Assignees

• Ericsson Telefon Ab L M

Inventors

• Lindoff Bengt
• Gunnarsson Fredrik
• Sorrentino Stefano

Classifications

• H04W76/021

  Electricity · mapped topic

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title

• H04L25/03866 Primary

  using scrambling · CPC title

• H04W76/14

  Direct-mode setup · CPC title