DEVICE TO DEVICE COMMUNICATION METHOD AND USER EQUIPMENT

• US 20160345375A1
• Filed: 01/22/2014
• Published: 11/24/2016
• Est. Priority Date: 01/22/2014
• Status: Active Grant

• Current Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Inventors: WANG, Jian
• Granted Patent: US 10,129,917 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0056 Systems characterized by the type of code used H04L1/08 takes precedence
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals

Abstract

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.

Claims

1-70. -70. (canceled)

71. 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 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, the scrambled to-be-sent bit.

72. The D2D communication method according to claim 71, wherein the scrambling code parameter includes the specific scrambling code parameter;

and

the determining, by the first user equipment, the value of the scrambling code parameter further comprises;

determining, by the first user equipment, the value of the specific scrambling code parameter according to at least one of a D2D identifier of the first user equipment, a D2D group identifier of the first user equipment, or a service type identifier of the first user equipment.

73. The D2D communication method according to claim 72, wherein the determining, by the first user equipment, the value of the specific scrambling code parameter further comprises:

determining, by the first user equipment, the value of the specific scrambling code parameter according to the at least one of the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, or the service type identifier of the first user equipment, and a hash function;

or

determining, by the first user equipment, the value of the specific scrambling code parameter according to the at least one of the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, or the service type identifier of the first user equipment, and a truncate function.

74. The D2D communication method according to claim 71, 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.

75. The D2D communication method according to claim 74, 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.

76. 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 at least one of the following parameters;

a common scrambling code parameter and a specific scrambling code parameter; and

descrambling, by the second user equipment, the received bit according to the value of the scrambling code parameter.

77. The D2D communication method according to claim 76, wherein a value of the specific scrambling code parameter is obtained after an operation is performed on at least one of a D2D identifier of the first user equipment, a D2D group identifier of the first user equipment, or a service type identifier of the first user equipment by using a preset function.

78. The D2D communication method according to claim 77, wherein the value of the specific scrambling code parameter is the D2D identifier of the first user equipment;

the value of the specific scrambling code parameter is the D2D group identifier of the first user equipment;

or

the value of the specific scrambling code parameter is the service type identifier of the first user equipment.

79. The D2D communication method according to claim 77, wherein the preset function is a hash function or a truncate function.

80. The D2D communication method according to claim 76, 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.

81. The D2D communication method according to claim 80, 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.

82. User equipment, comprising:

a processor, configured to determine a value of a scrambling code parameter, wherein the scrambling code parameter comprises at least one of the following parameters;

a common scrambling code parameter and a specific scrambling code parameter; and

scramble a to-be-sent bit according to the value that is of the scrambling code parameter and that is determined by the determining module; and

a transmitter, configured to send the to-be-sent bit scrambled by the processor.

83. The user equipment according to claim 82, wherein the scrambling code parameter includes the specific scrambling code parameter;

and

the processor is further configured to determine the value of the specific scrambling code parameter according to at least one of a D2D identifier of the user equipment, a D2D group identifier of the user equipment, or a service type identifier of the user equipment.

84. The user equipment according to claim 83, wherein the processor is further configured to:

determine the value of the specific scrambling code parameter according to the at least one of the D2D identifier of the user equipment, the D2D group identifier of the user equipment, or the service type identifier of the user equipment, and a hash function;

or

determine the value of the specific scrambling code parameter according to the at least one of the D2D identifier of the user equipment, the D2D group identifier of the user equipment, or the service type identifier of the user equipment, and a truncate function.

85. The user equipment according to claim 82, 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.

86. 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 at least one of the following parameters;

a common scrambling code parameter and 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.

87. The user equipment according to claim 86, wherein a value of the specific scrambling code parameter is obtained after an operation is performed on at least one of a D2D identifier of the first user equipment, a D2D group identifier of the first user equipment, or a service type identifier of the first user equipment by using a preset function.

88. The user equipment according to claim 87, wherein the value of the specific scrambling code parameter is the D2D identifier of the first user equipment;

the value of the specific scrambling code parameter is the D2D group identifier of the first user equipment;

or

the value of the specific scrambling code parameter is the service type identifier of the first user equipment.

89. The user equipment according to claim 87, wherein the function is a hash function or a truncate function.

90. The user equipment according to claim 86, 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.