Enhanced access channel masks for xHRPD

• US 8,605,753 B2
• Filed: 09/08/2011
• Issued: 12/10/2013
• Est. Priority Date: 09/27/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Roh, Dongwook, Kim, Sanggook, Sun, Lihsiang
• Primary Examiner(s): Lai, Andrew
• Assistant Examiner(s): MALCOLM, MARIO D
• Application Number:
  US13/227,690
• Publication Number:
  US 20120076157A1
• Time in Patent Office: 824 Days
• Field of Search: None
• US Class Current: 370/474
• 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

Disclosed is a method of performing Pseudo-random-Noise (PN) quadrature covering for transmitting data via an access channel. Such method is achieved by 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 and by performing exclusive OR operations on certain bits of the received access long code mask MI_ACMAC and 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 of performing Pseudo-Noise (PN) quadrature covering for transmitting data via an access channel by an access terminal, the method comprising:

receiving an access long code mask MI_ACMAC and an access long code mask MQ_ACMAC by the access terminal;

generating a MI mask (In-phase mask) which is a mask sequence used for generating a PNI (In-phase pseudo-noise) sequence and a MQ mask (Quadrature-phase mask) which is a mask sequence used for generating a PNQ (Quadrature-phase pseudo-noise) sequence by the access terminal;

generating the PNI and the PNQ which are sequences for the PN quadrature covering by the access terminal; and

transmitting the data covered with the generated PNI sequence and the data covered with the generated PNQ sequence via the access channel by the access terminal,

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

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, 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,

wherein ⊕

denotes exclusive OR operation, and

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

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 generated MI mask and the generated 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 perform Pseudo-Noise (PN) quadrature covering for transmitting data via an access channel, the apparatus comprising:

a receiver unit configured to receive an access long code mask MI_ACMAC and an access long code mask MQ_ACMAC;

a generator unit configured to generate a MI mask (In-phase mask) which is a mask sequence used for generating a PNI (In-phase pseudo-noise) sequence and a MQ mask (Quadrature-phase mask) which is a mask sequence used for generating a PNQ (Quadrature-phase pseudo-noise) sequence; and

a transmitter unit configured to transmit the data covered with the generated PNI sequence and the data covered with the generated PNQ sequence via the access channel,

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

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,

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,

wherein ⊕

denotes exclusive OR operation, and

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

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 4, wherein the generated MI mask and the generated 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.

7. An apparatus to perform Pseudo-Noise (PN) quadrature covering for transmitting data via an access channel, the apparatus comprising:

receiver configured to receive an access long code mask MI_ACMAC and an access long code mask MQ_ACMAC;

means for generating a MI mask (In-phase mask) which is a mask sequence used for generating a PNI (In-phase pseudo-noise) sequence and a MQ mask (Quadrature-phase mask) which is a mask sequence used for generating a PNQ (Quadrature-phase pseudo-noise) sequence; and

transmitter configured to transmit the data covered with the generated PNI sequence and the data covered with the generated PNQ sequence via the access channel,

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

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,

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,

wherein ⊕

denotes exclusive OR operation, and

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