Protected paging indication mechanism within wireless networks

• US 7,826,858 B2
• Filed: 07/12/2006
• Issued: 11/02/2010
• Est. Priority Date: 07/12/2006
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Qi, Emily H., Walker, Jesse R., Tsai, JR-Shian
• Primary Examiner(s): Le; Danh C
• Application Number:
  US11/457,111
• Publication Number:
  US 20080014882A1
• Time in Patent Office: 1,574 Days
• Field of Search: 455/458, 455/574, 455/426.1, 370/328
• US Class Current: 455/458
• CPC Class Codes: H04W 12/041 Key generation or derivation
• CPC Class Codes: H04W 12/0431 Key distribution or pre-distribution; Key agreement
• CPC Class Codes: H04W 12/0433 Key management protocols
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 68/12 Inter-network notification
• CPC Class Codes: H04W 92/02 Inter-networking arrangements

Abstract

Embodiments of the present invention provide methods and apparatus for a protected paging indication mechanism within wireless networks. Other embodiments may be described and claimed.

Claims

1. A method comprising:

generating, by a paging service, a paging indication message (PIM) having at least one paging index that indicates whether at least one of a plurality of stations (STA) may be being paged, the at least one paging index having at least one of obfuscated key identification identifying an integrity pairwise temporal key (IPTK) between the paging service and an STA, or obfuscated STA medium access control (MAC) address, wherein the IPTK is generated via a key derivation function from a service pairwise key (SPK) that is derived from a mobile station key (MSK); and

transmitting, by the paging service, the PIM to the STA.

2. The method of claim 1, wherein generating the PIM comprises generating the PIM to have a plurality of paging indices.

3. The method of claim 2, further comprising generating, by the paging service, a paging bitmap that represents the plurality of paging indices, wherein the PIM includes the paging bitmap.

4. The method of claim 3, wherein generating the paging bitmap comprises using a function with an input of at least a portion of the IPTK.

5. The method of claim 4, wherein generating the paging bitmap comprises using ate least one of an identification for an IPTK or a STA MAC address.

6. The method of claim 5, wherein the identification comprises 2 bytes.

7. The method of claim 6, wherein generating the paging bitmap comprises generating a paging bitmap comprising at least 64 bits.

8. The method claim 1, further comprising transmitting within the PIM specific paging information indicating which specific STAs within the plurality of STAs are actually being paged.

9. The method of claim 8, further comprising transmitting within the PIM a message integrity code.

10. The method of claim 8, further comprising transmitting within the PIM a sequence number.

11. An article of manufacture comprising:

a storage medium; and

a plurality of instructions stored in the storage medium and designed to enable an access point (AP) to perform a plurality of AP operations, a station (STA) to perform a plurality of STA operations, or both;

the plurality of AP operations including;

receiving from a paging service within a network comprising a plurality of STAs, a paging indication message (PIM) comprising at least one paging index that indicates whether at least one STA may be being paged, the at least one paging index having at least one of obfuscated key identification identifying an integrity pairwise temporal key (IPTK) between the paging service and an STA, or obfuscated STA medium access control (MAC) address, wherein the IPTK is generated via a key derivation function from a service pairwise key (SPK) that is derived from a mobile station key (MSK), the PIM further including at least one paged indication element for an STA within the plurality of STAs indicating that the STA is actually being paged; and

transmitting the PIM to the plurality of STAs;

the plurality of STA operations including;

receiving the PIM from at least one AP; and

interpreting the PIM to determine if the STA may be being paged.

12. The article of manufacture of claim 11, wherein the plurality of instructions are further designed to enable the STA to interpret the PIM to determine if the STA is actually being paged and to determine whether to exit a paging mode and resume communication within a network.

13. The article of manufacture of claim 11, wherein the PIM comprises a paging bitmap that represents a plurality of paging indices, and wherein the plurality of instructions are further designed to enable the STA to interpret the paging bitmap in order to determine if the STA may be being paged.

14. The article of manufacture of claim 13, wherein the plurality of instructions are further designed to enable the STA to determine if the PIM includes a page for the STA, to verify a message integrity code within the PIM to determine whether the PIM is trustworthy, and to determine whether to exit a paging mode and resume communication within the network.

15. The article of manufacture of claim 14, wherein the plurality of instructions are further designed to enable the STA to verify a sequence number within the PIM to determine whether the paging indication message is replayed.

16. A system comprising:

an omnidirectional antenna; and

a paging service operatively coupled to the antenna to control paging of stations (STAs) within one or more paging groups, the paging service being adapted to generate a paging indication message (PIM) comprising at least one paging index for at least one of the STAs and to transmit the PIM, the at least one paging index having at least one of obfuscated key identification identifying an integrity pairwise temporal key (IPTK) between the paging service and an STA, wherein the IPTK is generated via a key derivation function from a service pairwise key (SPK) that is derived from a mobile station key (MSK), or obfuscated STA medium access control (MAC) address.

17. The system of claim 16, wherein the paging service is adapted to generate the PIM to include a paging bitmap that includes a plurality of bits that represent a plurality of paging indices.

18. The system of claim 16, wherein the paging service is adapted to generate the PIM to include specific paging information indicating which specific STAs are being paged.

19. The system of claim 16, wherein the paging service is adapted to generate the PIM to include a message integrity code.

20. The system of claim 16, wherein the paging service is adapted to generate the PIM to include a sequence number.