Device to device communication method and user equipment
View Patent ↗The present invention discloses a D2D communication method and user equipment. The D2D communication method includes: determining, by first user equipment, a value of a scrambling code parameter, where the scrambling code parameter includes at least one of the following parameters: a common scrambling code parameter and a specific scrambling code parameter; scrambling, by the first user equipment, a to-be-sent bit according to the value of the scrambling code parameter; and sending, by the first user equipment, a scrambled to-be-sent bit. According to the D2D communication method and the user equipment disclosed in the present invention, transmission information can be scrambled and descrambled in a D2D communication process, thereby improving feasibility of a D2D communication scheme and improving user experience.
1. A device to device (D2D) communication method, comprising:
determining, by a first user equipment, a value of a scrambling code parameter, wherein the scrambling code parameter comprises a specific scrambling code parameter;
scrambling, by the first user equipment, a to-be-sent bit according to the value of the scrambling code parameter; and
sending, by the first user equipment, the scrambled to-be-sent bit;
wherein the value of the specific scrambling code parameter is determined according to a D2D group identifier of the first user equipment and a truncate function, the truncate function is used to truncate an identifier from a back end to a front end.
2. The D2D communication method according to claim 1 , wherein the scrambling, by the first user equipment, the to-be-sent bit according to the value of the scrambling code parameter comprises:
determining, by the first user equipment, a scrambling code initial value according to the value of the scrambling code parameter; and
generating, by the first user equipment, a scrambling code sequence according to the scrambling code initial value, and scrambling the to-be-sent bit by using the scrambling code sequence.
3. The D2D communication method according to claim 2 , wherein the determining, by the first user equipment, the scrambling code initial value according to the value of the scrambling code parameter further comprises:
determining, by the first user equipment, the value of the specific scrambling code parameter as the scrambling code initial value.
4. A device to device (D2D) communication method, comprising:
receiving, by a second user equipment, a bit sent by a first user equipment;
determining, by the second user equipment, a value of a scrambling code parameter of the first user equipment, wherein the scrambling code parameter comprises a specific scrambling code parameter; and
descrambling, by the second user equipment, the received bit according to the value of the scrambling code parameter;
wherein a value of the specific scrambling code parameter is obtained after an operation is performed on a D2D group identifier of the first user equipment by using a preset function as a truncate function to truncate an identifier from a back end to a front end.
5. The D2D communication method according to claim 4 , wherein the descrambling, by the second user equipment, the received bit according to the value of the scrambling code parameter further comprises:
determining, by the second user equipment, a scrambling code initial value according to the value of the scrambling code parameter; and
generating, by the second user equipment, a scrambling code sequence according to the scrambling code initial value, and descrambling the received bit by using the scrambling code sequence.
6. The D2D communication method according to claim 5 , wherein the determining, by the second user equipment, the scrambling code initial value according to the value of the scrambling code parameter further comprises:
determining, by the second user equipment, the value of the specific scrambling code parameter as the scrambling code initial value.
7. User equipment, comprising:
a processor, configured to determine a value of a scrambling code parameter, wherein the scrambling code parameter comprises a specific scrambling code parameter; and scramble a to-be-sent bit according to the value of the scrambling code parameter; and
a transmitter, configured to send the to-be-sent bit scrambled by the processor;
wherein the value of the specific scrambling code parameter is determined according to a D2D group identifier of the user equipment and a truncate function, the truncate function is used to truncate an identifier from a back end to a front end.
8. The user equipment according to claim 7 , wherein the processor is further configured to determine a scrambling code initial value according to the value of the scrambling code parameter; and generate a scrambling code sequence according to the scrambling code initial value determined by the determining unit, and scramble the to-be-sent bit by using the scrambling code sequence.
9. User equipment, comprising:
a receiver, configured to receive a bit sent by a first user equipment;
a processor, configured to determine a value of a scrambling code parameter of the first user equipment, wherein the scrambling code parameter comprises a specific scrambling code parameter; and
the processor is further configured to descramble, according to the value that is of the scrambling code parameter and the bit received by the receiver;
wherein a value of the specific scrambling code parameter is obtained after an operation is performed on a D2D group identifier of the first user equipment by using a preset function as a truncate function to truncate an identifier from a back end to a front end.
10. The user equipment according to claim 9 , wherein the processor is further configured to determine a scrambling code initial value according to the value of the scrambling code parameter; and generate a scrambling code sequence according to the scrambling code initial value determined by the third determining unit, and descramble the received bit by using the scrambling code sequence.