Cellular modem processing
View Patent ↗A cellular mobile station including a modem processor and memory. The memory includes instructions for the modem processor to perform layer 1 processor operations, layer 2 processor operations, and layer 3 processor operations. The modem processor executes the instructions to perform processor operations for the cellular mobile station to communication data as per a cellular communications protocol. In one example, the mobile station includes different levels of memory to provide different deterministic access times.
1. Integrated circuitry comprising:
a cellular modem processor which executes instructions from an instruction set; and
at least one memory coupled to the cellular modem processor, the at least one memory storing instructions, the instructions including instructions that when executed by the cellular modem processor perform a layer 1 processor operation of a cellular communication protocol by the cellular modem processor, instructions that when executed by the cellular modem processor perform a layer 2 processor operation of the cellular communication protocol by the cellular modem processor, and instructions that when executed by the cellular modem processor perform a layer 3 processor operation of the cellular communication protocol by the cellular modem processor;
a second processor, wherein the cellular modem processor and the second processor are implemented on a single integrated circuit;
at least one shared memory accessible by both the cellular modem processor and the second processor, wherein the at least one shared memory is divided into at least two regions, a first region of the at least two regions is accessible only by the cellular modem processor, and a second region of the at least two regions is accessible by both the cellular modem processor and the second processor.
2. The integrated circuitry of claim 1 further comprising:
a hardware accelerator, the hardware accelerator implementing a security feature, the security feature including one of generating a digital signature for a section of instructions of the cellular modem processor and encrypting and decrypting key variables.
3. The integrated circuitry of claim 1 wherein the cellular modem processor is characterized as a digital signal processor.
4. The integrated circuitry of claim 1 wherein the cellular modem processor is characterized as a microcontroller unit processor.
5. The integrated circuitry of claim 1 wherein the layer 1 processor operation is one of a modulation processor operation, a demodulation processor operation, an interleaving processor operation, a deinterleaving processor operation, a channel encoding processor operation, a channel decoding processor operation, a channel equalization processor operation, a synchronization processor operation, an automatic gain control processor operation, and an automatic frequency control processor operation.
6. The integrated circuitry of claim 1 wherein the instructions include instructions for performing by the cellular modem processor, a modulation processor operation, a demodulation processor operation, an interleaving processor operation, a deinterleaving processor operation, a channel encoding processor operation, a channel decoding processor operation, a channel equalization processor operation, a synchronization processor operation, an automatic gain control processor operation, and an automatic frequency control processor operation.
7. The integrated circuitry of claim 1 wherein the layer 2 processor operation is one of a medium access control processor operation and a logical link control processor operation.
8. The integrated circuitry of claim 1 wherein the layer 3 processor operation is one of a call control (CC) management processor operation, a mobility management (MM) processor operation, a subnet convergence protocol (SNDCP) processor operation, and a radio resource (RR) management processor operation.
9. The integrated circuitry of claim 1 wherein the instructions include instructions for performing by the cellular modem processor, a call control (CC) management processor operation, a mobility management (MM) processor operation, a subnet convergence protocol (SNDCP) processor operation, and a radio resource (RR) management processor operation.
10. The integrated circuitry of claim 1 wherein the cellular modem processor and at least some of the at least one memory are implemented on a single integrated circuit.
11. The integrated circuitry of claim 1 wherein at least some of the at least one memory is implemented on a separate integrated circuit from the cellular modem processor.
12. The integrated circuitry of claim 1 wherein the cellular modem processor and the at least one memory are implemented on a single integrated circuit.
13. The integrated circuitry of claim 1 wherein the at least some of the at least one memory is implemented in hierarchical levels of memory to provide a plurality of deterministic access times.
14. The integrated circuitry of claim 13 wherein each hierarchical level of memory further comprises non volatile memory and/or volatile memory.
15. The integrated circuitry of claim 1 wherein the at least one memory further comprises hierarchical levels of cache memory.
16. The integrated circuitry of claim 1 wherein
the second processor executes application instructions and does not perform modem processor operations.
17. The integrated circuitry of claim 1 further comprising:
a hardware accelerator operably coupled to the cellular modem processor, wherein one or more modem operations are performed by the hardware accelerator.
18. The integrated circuitry of claim 1 wherein the at least one memory stores instructions for the cellular modem processor to perform all layer 1 processor operations and all layer 2 processor operations.
19. The integrated circuitry of claim 18 wherein the at least one memory stores instructions for the cellular modem processor to perform all layer 3 processor operations.
20. The integrated circuitry of claim 1 wherein during operation, the first region stores instructions for performing modem processor operations by the cellular modem processor.
21. The integrated circuitry of claim 1 wherein during operation, data is passed between the cellular modem processor and the second processor by placement in and retrieval from the second region.
22. The integrated circuitry of claim 1 wherein during operation, commands are passed between the cellular modem processor and the second processor by placement in and retrieval from the second region.
23. The integrated circuitry of claim 1 wherein the cellular modem processor accesses multimedia information written to the second region by the second processor.
24. The integrated circuitry of claim 1 wherein during operation, cellular modem processor instructions are provided by the second processor to the cellular modem processor by placement in and retrieval from the shared memory.
25. The integrated circuitry of claim 1 further comprising:
a direct memory access (DMA), wherein during operation, the DMA writes information to the shared memory.
26. A method of performing cellular modem processor operations comprising:
performing a layer 1 processor operation in accordance with a cellular communication protocol by a cellular modem processor;
performing a layer 2 processor operation in accordance with the cellular communication protocol by the cellular modem processor; and
performing a layer 3 processor operation in accordance with the cellular communication protocol by the cellular modem processor
accessing a first region of a shared memory by the cellular modem processor;
accessing a second region of the shared memory by the cellular modem processor;
accessing the second region of the shared memory by a second processor, wherein the first region is not accessible by the second processor.
27. The method of claim 26 further comprising:
processing multimedia information by the cellular modem processor.
28. The method of claim 27 further comprising:
accessing by a second processor, the multimedia information processed by the cellular modem processor from the second region.
29. The method of claim 26 wherein all layer 1 processor operations and all layer 2 processor operations are performed by the cellular modem processor.
30. The method of claim 26 wherein all layer 3 processor operations are performed by the cellular modem processor.
31. The method of claim 26 wherein the modem processor operations are implemented by using instructions of one instruction set.
32. The method of claim 26 wherein all modem operations are implemented by the cellular modem processor executing instructions of an instruction set.
33. The method of claim 26 wherein the layer 1 processor operation is one of a modulation processor operation, a demodulation processor operation, an interleaving processor operation, a deinterleaving processor operation, a channel encoding processor operation, a channel decoding processor operation, a channel equalization processor operation, a synchronization processor operation, an automatic gain control processor operation, and an automatic frequency control processor operation.
34. The method of claim 26 further comprising:
performing a modulation processor operation by the cellular modem processor;
performing a demodulation processor operation by the cellular modem processor;
performing an interleaving processor operation by the cellular modem processor;
performing a deinterleaving processor operation by the cellular modem processor;
performing a channel encoding processor operation by the cellular modem processor;
performing a channel decoding processor operation by the cellular modem processor;
performing a channel equalization processor operation by the cellular modem processor;
performing a synchronization processor operation by the cellular modem processor;
performing an automatic gain control processor operation by the cellular modem processor; and
performing an automatic frequency control processor operation by the cellular modem processor.
35. The method of claim 26 wherein the layer 2 processor operation is one of a medium access control processor operation and a logical link control processor operation.
36. The method of claim 26 wherein the layer 3 processor operation is one of a call control (CC) management processor operation, a mobility management (MM) processor operation, a subnet convergence protocol (SNDCP) processor operation, and a radio resource (RR) management processor operation.
37. The method of claim 26 further comprising:
performing a call control (CC) management processor operation by the cellular modem processor;
performing a mobility management (MM) processor operation by the cellular modem processor;
performing a subnet convergence protocol (SNDCP) processor operation by the cellular modem processor, and
performing a radio resource (RR) management processor operation by the cellular modem processor.
38. The method of claim 26 further comprising;
extracting data from a wireless signal, wherein the extracting includes:
performing a layer 1 processor operation in accordance with the cellular communications protocol by the cellular modem processor;
performing a layer 2 processor operation in accordance with the cellular communications protocol by the cellular modem processor; and
performing a layer 3 processor operation in accordance with the cellular communications protocol by the cellular modem processor;
storing the data in the second region of the shared memory;
accessing the data stored in the second region of the shared memory by a second processor.
39. The method of claim 26 further comprising;
storing data in the second region of the shared memory by a second processor;
accessing the data stored in the second region of the shared memory by the cellular modem processor;
inserting the data into a wireless signal, wherein the inserting includes:
performing a layer 1 processor operation in accordance with the cellular communications protocol by the cellular modem processor;
performing a layer 2 processor operation in accordance with the cellular communications protocol by the cellular modem processor; and
performing a layer 3 processor operation in accordance with the cellular communications protocol by the cellular modem processor.
40. The method of claim 26 wherein the layer 1 processor operation, the layer 2 processor operation, and the layer 3 processor operation are performed by the cellular modem processor executing instructions from one instruction set.
41. The method of claim 26 further comprising:
compressing a first set of information by the cellular modem processor;
storing the compressed information in the second region;
retrieving the compressed information by the second processor, wherein the retrieving includes accessing the second region.
42. The method of claim 41 wherein the first set of information is generated by a camera.
43. The method of claim 41 wherein the second processor writes the first set of information to the second region and the cellular modem processor retrieves the first set of information from the second region.
44. The method of claim 26 further comprising:
performing a multimedia acceleration function by the cellular modem processor on a first set of information.
45. The method of claim 44 wherein the first set of information was written to the second region of the shared memory by the second processor.
46. The method of claim 26 further comprising:
decompressing music information by the cellular modem processor.
47. The method of claim 26 further comprising:
decompressing video information by the cellular modem processor.
48. The method of claim 26 further comprising:
compressing music information by the cellular modem processor.
49. The method of claim 26 further comprising:
compressing video information by the cellular modem processor.
50. The method of claim 26 further comprising:
writing information to the shared memory by a direct memory access (DMA).
51. The method of claim 26 wherein the second processor is in a low power mode during the performing the layer 1 processor operation and the performing a layer 2 processor operation.
52. An integrated circuit for a cellular mobile station, the cellular mobile station communicating data as per a cellular communication protocol, the integrated circuit comprising:
a memory, the memory holding instructions when the integrated circuit is operational;
a cellular modem processor, the cellular modem processor to execute instructions including instructions in the memory, the cellular modem processor to execute instructions to perform a layer 1 processor operation of a cellular communication protocol, instructions to perform a layer 2 processor operation of the cellular communication protocol, and instructions to perform a layer 3 processor operation of the cellular communication protocol when the integrated circuit is operational;
a second processor;
a shared memory accessible by both the cellular modem processor and the second processor, the shared memory including a first region and a second region, the first region is accessible by the cellular modem processor and not the second processor, the second region is accessible by the cellular modem processor and the second processor.
53. The cellular mobile station of claim 52 wherein the cellular modem processor is characterized as a digital signal processor.
54. The integrated circuit of claim 52 wherein the cellular modem processor is characterized as a microcontroller unit processor.
55. The integrated circuit of claim 52 wherein the layer 1 processor operation is one of a modulation processor operation, a demodulation processor operation, an interleaving processor operation, a deinterleaving processor operation, a channel encoding processor operation, a channel decoding processor operation, a channel equalization processor operation, a synchronization processor operation, an automatic gain control processor operation, and an automatic frequency control processor operation.
56. The integrated circuit of claim 52 wherein the instructions to be executed by the cellular modem processor when the integrated circuit is operational include instructions for performing by the cellular modem processor, a modulation processor operation, a demodulation processor operation, an interleaving processor operation, a deinterleaving processor operation, a channel encoding processor operation, a channel decoding processor operation, a channel equalization processor operation, a synchronization processor operation, an automatic gain control processor operation, and an automatic frequency control processor operation.
57. The integrated circuit of claim 52 wherein the layer 2 processor operation is one of a medium access control processor operation and a logical link control processor operation.
58. The integrated circuit of claim 52 wherein the layer 3 processor operation is one of a call control (CC) management processor operation, a mobility management (MM) processor operation, a subnet convergence protocol (SNDCP) processor operation, and a radio resource (RR) management processor operation.
59. The integrated circuit of claim 52 wherein the instructions to be executed by the cellular modem processor when the integrated circuit is operational include instructions for performing by the cellular modem processor, a call control (CC) management processor operation, a mobility management (MM) processor operation, a subnet convergence protocol (SNDCP) processor operation, and a radio resource (RR) management processor operation.
60. The integrated circuit of claim 52 wherein the memory includes cache memory.
61. The integrated circuit of claim 52 wherein the memory includes a non volatile memory.
62. The integrated circuit of claim 52 wherein the cellular modem processor performs all layer 1 processor operations and all layer 2 processor operations when the integrated circuit is operational.
63. The integrated circuit of claim 62 wherein the cellular modem processor performs all level 3 processor operations when the integrated circuit is operational.
64. The integrated circuit of claim 52 wherein during operation, the first region stores instructions for performing modem processor operations by the cellular modem processor.
65. The integrated circuit of claim 52 wherein during operation, data is passed between the cellular modem processor and the second processor by placement in and retrieval from the second region.
66. The integrated circuit of claim 52 wherein during operation, commands are passed between the cellular modem processor and the second processor by placement in and retrieval from the second region.
67. The integrated circuit of claim 52 wherein the cellular modem processor accesses multimedia information written to the second region by the second processor.
68. The integrated circuit of claim 52 wherein during operation, cellular modem processor instructions are provided by the second processor to the cellular modem processor by placement in and retrieval from the shared memory.
69. The integrated circuit of claim 52 further comprising:
a direct memory access (DMA), wherein during operation, the DMA writes information to the shared memory.
70. An integrated circuit for a cellular mobile station, the cellular mobile station communicating data as per a cellular communication protocol, the integrated circuit comprising:
a cellular modem processor, the cellular modem processor to execute instructions to perform a layer 1 processor operation of a cellular communication protocol, instructions to perform a layer 2 processor operation of the cellular communication protocol, and instructions to perform a layer 3 processor operation of the cellular communication protocol when the integrated circuit is operational; and
a second processor;
at least one shared memory accessible by both the cellular modem processor and the second processor;
wherein the at least one shared memory is divided into at least two regions, a first region of the at least two regions is accessible only by the cellular modem processor, and a second region of the at least two regions is accessible by both the cellular modem processor and the second processor.
71. The integrated circuit of claim 70 wherein the layer 1 processor operation is one of a modulation processor operation, a demodulation processor operation, an interleaving processor operation, a deinterleaving processor operation, a channel encoding processor operation, a channel decoding processor operation, a channel equalization processor operation, a synchronization processor operation, an automatic gain control processor operation, and an automatic frequency control processor operation.
72. The integrated circuit of claim 70 wherein the instructions to be executed by the cellular modem processor when the integrated circuit is operational include instructions for performing by the cellular modem processor, a modulation processor operation, a demodulation processor operation, an interleaving processor operation, a deinterleaving processor operation, a channel encoding processor operation, a channel decoding processor operation, a channel equalization processor operation, a synchronization processor operation, an automatic gain control processor operation, and an automatic frequency control processor operation.
73. The integrated circuit of claim 70 wherein the layer 2 processor operation is one of a medium access control processor operation and a logical link control processor operation.
74. The integrated circuit of claim 70 wherein the layer 3 processor operation is one of a call control (CC) management processor operation, a mobility management (MM) processor operation, a subnet convergence protocol (SNDCP) processor operation, and a radio resource (RR) management processor operation.
75. The integrated circuit of claim 70 wherein the instructions to be executed by the cellular modem processor when the integrated circuit is operational include instructions for performing by the cellular modem processor, a call control (CC) management processor operation, a mobility management (MM) processor operation, a subnet convergence protocol (SNDCP) processor operation, and a radio resource (RR) management processor operation.
76. The integrated circuit of claim 70 wherein the second processor executes application instructions and does not perform modem processor operations.
77. The integrated circuit of claim 70 wherein the cellular modem processor performs all layer 1 processor operations and all layer 2 processor operations when the integrated circuit is operational.
78. The integrated circuit of claim 77 wherein the cellular modem processor performs all level 3 processor operations when the integrated circuit is operational.
79. The integrated circuit of claim 70 wherein during operation, the first region stores instructions for performing modem processor operations by the cellular modem processor.
80. The integrated circuit of claim 70 wherein during operation, data is passed between the cellular modem processor and the second processor by placement in and retrieval from the second region.
81. The integrated circuit of claim 70 wherein during operation, commands are passed between the cellular modem processor and the second processor by placement in and retrieval from the second region.
82. The integrated circuit of claim 70 wherein the cellular modem processor accesses multimedia information written to the second region by the second processor.
83. The integrated circuit of claim 70 wherein during operation, cellular modem processor instructions are provided by the second processor to the cellular modem processor by placement in and retrieval from the shared memory.
84. The integrated circuit of claim 70 further comprising:
a direct memory access (DMA), wherein during operation, the DMA writes information to the shared memory.
85. Integrated circuitry for a cellular mobile station, the cellular mobile station communicating as per a cellular communication protocol, the integrated circuitry comprising:
a cellular modem processor, the cellular modem processor to execute instructions to perform a layer 1 processor operation of the cellular communication protocol, instructions to perform a layer 2 processor operation of the cellular communication protocol, and instructions to perform a layer 3 processor operation of the cellular communication protocol when the integrated circuit is operational; and
a second processor;
a shared memory accessible by both the cellular modem processor and the second processor, the shared memory includes a first region and a second region, the first region is accessible by the cellular modem processor and not the second processor, the second region is accessible by the cellular modem processor and the second processor.
86. The integrated circuitry of claim 85 wherein the cellular modem processor and the second processor are implemented on a single integrated circuit.
87. The integrated circuitry of claim 85 wherein the shared memory is implemented on a different integrated circuit from the cellular modem processor.
88. The integrated circuitry of claim 85 wherein the second processor is implemented on a different integrated circuit from the cellular modem processor.
89. The integrated circuitry of claim 85 wherein the shared memory is implemented on a different integrated circuit from the second processor.
90. The integrated circuitry of claim 85 wherein during operation, the first region stores instructions for performing modem processor operations by the cellular modem processor.
91. The integrated circuitry of claim 85 wherein during operation, data is passed between the cellular modem processor and the second processor by placement in and retrieval from the second region.
92. The integrated circuitry of claim 85 wherein during operation, commands are passed between the cellular modem processor and the second processor by placement in and retrieval from the second region.
93. The integrated circuitry of claim 85 wherein the cellular modem processor accesses multimedia information written to the second region by the second processor.
94. The integrated circuitry of claim 85 wherein during operation, cellular modem processor instructions are provided by the second processor to the cellular modem processor by placement in and retrieval from the shared memory.
95. The integrated circuitry of claim 85 further comprising:
a direct memory access (DMA), wherein during operation, the DMA writes information to the shared memory.