Enhanced access channel masks for xHRPD

• US 9,241,343 B2
• Filed: 11/18/2013
• Issued: 01/19/2016
• Est. Priority Date: 09/27/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Sanggook, Sun, Lihsiang, Roh, Dongwook
• Primary Examiner(s): Lai, Andrew
• Assistant Examiner(s): Nguyen, Chuong M
• Application Number:
  US14/083,138
• Publication Number:
  US 20140071927A1
• Time in Patent Office: 792 Days
• US Class Current: 1/1
• CPC Class Codes: H04J 13/0022 PN, e.g. Kronecker
• CPC Class Codes: H04J 13/10 Code generation
• CPC Class Codes: H04J 13/102 Combining codes
• CPC Class Codes: H04L 27/34 Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
• CPC Class Codes: H04W 74/002 Transmission of channel access control information

Abstract

A method of performing Pseudo-random-Noise (PN) quadrature covering for transmitting data via an access channel. The method according to one embodiment includes receiving a 42-bit access long code mask MI_ACMAC and a 42-bit access long code mask MQ_ACMAC from an upper layer; generating an MI mask and an MQ mask for PN quadrature covering by using certain bits of an assigned channel number for the access channel; performing exclusive OR operations on certain bits of the received access long code mask MI_ACMAC; performing exclusive OR operations on certain bits of the received access long code mask MQ_ACMAC; and transmitting signals via the access channel based on the generated 12-bit MI mask and the generated 12-bit MQ mask.

Claims

1. A method for receiving Pseudo-Noise (PN) quadrature covering data via an access channel by an access network, the method comprising:

transmitting an access long code mask MI_ACMAC and an access long code mask MQ_ACMAC to an access terminal; and

receiving the data covered with a PNI sequence and a PNQ sequence from the access terminal,

wherein the MI_ACMAC and the MQ_ACMAC are related with an Access channel Medium Access Control (MAC) protocol,

wherein the PNI is a sequence generating by the access terminal summed by a MI mask and a PN sequence generated by a polynomial PI(x)=x¹²+x⁶+x⁴+x+1 for an In-phase branch of a Quadrature Phase Shift Keying (QPSK) and the PNQ is a sequence generating by the access terminal summed by a MQ mask and a PN sequence generated by a polynomial PQ(x)=x¹²+x⁹+x³+x²+1 for a Quadrature-phase branch of a Quadrature Phase Shift Keying (QPSK),

wherein the MI mask are a mask sequence generating by the access terminal for the In-phase branch of the Quadrature Phase Shift Keying (QPSK) symbol of the access channel and the MQ mask are a mask sequence generating by the access terminal for the Quadrature-phase branch of the QPSK symbol of the access channel,

wherein MI3 to MI0 of the MI mask and MQ3 to MQ0 of the MQ mask are set to the lower 4 bits of an assigned channel number,

wherein MI11 to MI4 of the MI mask are set to be equal to the result of (A31 to A24) ⊕

(A23 to A16) ⊕

(A15 to A8) ⊕

(A7 to A0), where A31 to A0 are lower 32 bits of the MI_ACMAC, where (A31 to A24) is an 8-bit sequence starting from the 32nd bit to the 25th bit of the MI_ACMAC,

wherein MQ11 to MQ4 of the MQ mask are set to be equal to the result of (B31 to B24) ⊕

(B23 to B16) ⊕

(B15 to B8) ⊕

(B7 to B1, B32), where B31 to B0 are lower 32 bits of the MQ_ACMAC, where B32 is the 33rd bit of the MQ_ACMAC, where (B31 to B24) is an 8-bit sequence starting from the 32nd bit to the 25th bit of the MQ_ACMAC, wherein (B7 to B1, B32) comprises an 8-bit sequence having the first 7 bits filled with the 8th bit to the 2nd bit of the MQ_ACMAC and the last bit filled with the 33rd bit of the MQ_ACMAC, and

wherein ⊕

denotes exclusive OR operation.

2. The method of claim 1, wherein the access long code mask MI_ACMAC and the access long code mask MQ_ACMAC are respectively 42 bits in length.

3. The method of claim 2, wherein the MI mask and the MQ mask are respectively 12 bits in length, and the MI mask having MI11 to MI0, where MI11 indicates the 12th bit of the MI mask and MI0 indicates the 1st bit of the MI mask, and the MQ mask having MQ11 to MQ0, where MQ11 indicates the 12th bit of the MQ mask and MQ0 indicates the 1st bit of the MQ mask.

4. An apparatus to receive Pseudo-Noise (PN) quadrature covering data via an access channel from an access terminal, the apparatus comprising:

a transmitter that transmits an access long code mask MI_ACMAC and an access long code mask MQ_ACMAC to an access terminal; and

a receiver that receives the data covered with a PNI sequence and a PNQ sequence from the access terminal,

wherein the MI_ACMAC and the MQ_ACMAC are related with an Access channel Medium Access Control (MAC) protocol,

wherein the PNI is a sequence generating by the access terminal summed by a MI mask and a PN sequence generated by a polynomial PI(x)=x¹²+x⁶+x⁴+x+1 for an In-phase branch of a Quadrature Phase Shift Keying (QPSK) and the PNQ is a sequence generating by the access terminal summed by a MQ mask and a PN sequence generated by a polynomial PQ(x)=x¹²+x⁹+x³+x²+1 for a Quadrature-phase branch of a Quadrature Phase Shift Keying (QPSK),

wherein the MI mask are a mask sequence generating by the access terminal for the In-phase branch of the Quadrature Phase Shift Keying (QPSK) symbol of the access channel and the MQ mask are a mask sequence generating by the access terminal for the Quadrature-phase branch of the QPSK symbol of the access channel,

wherein MI3 to MI0 of the MI mask and MQ3 to MQ0 of the MQ mask are set to the lower 4 bits of an assigned channel number,

wherein MI11 to MI4 of the MI mask are set to be equal to the result of (A31 to A24) ⊕

(A23 to A16) ⊕

(A15 to A8) ⊕

(A7 to A0), where A31 to A0 are lower 32 bits of the MI_ACMAC, where (A31 to A24) is an 8-bit sequence starting from the 32nd bit to the 25th bit of the MI_ACMAC,

wherein MQ11 to MQ4 of the MQ mask are set to be equal to the result of (B31 to B24) ⊕

(B23 to B16) ⊕

(B15 to B8) ⊕

(B7 to B1, B32), where B31 to B0 are lower 32 bits of the MQ_ACMAC, where B32 is the 33rd bit of the MQ_ACMAC, where (B31 to B24) is an 8-bit sequence starting from the 32nd bit to the 25th bit of the MQ_ACMAC, wherein (B7 to B1, B32) comprises an 8-bit sequence having the first 7 bits filled with the 8th bit to the 2nd bit of the MQ_ACMAC and the last bit filled with the 33rd bit of the MQ_ACMAC, and

wherein ⊕

denotes exclusive OR operation.

5. The apparatus of claim 4, wherein the access long code mask MI_ACMAC and the access long code mask MQ_ACMAC are respectively 42 bits in length.

6. The apparatus of claim 5, wherein the MI mask and the MQ mask are respectively 12 bits in length, and the MI mask having MI11 to MI0, where MI11 indicates the 12th bit of the MI mask and MI0 indicates the 1st bit of the MI mask, and the MQ mask having MQ11 to MQ0, where MQ11 indicates the 12th bit of the MQ mask and MQ0 indicates the 1st bit of the MQ mask.