# US 2008/0186146 A1 · Method and system for managing communications between sub-systems of a communication device

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- Number: US 2008/0186146 A1
- Document ID: US20080186146A1
- Status: Published application
- Kind: A1
- Application number: 12/025,753
- Filed: 2008-02-05
- Published: 2008-08-07
- Earliest claimed: 2007-02-06
- Assignees: Freescale Semiconductor, Inc.
- Inventors: Nandan Tripathi; Rahul Garg; Vivek Goel; Rajan Kapoor; Sachin Prakash
- Web page: https://patentgrep.com/patent/US20080186146A1

## CPC

- H04W 52/028: {switching on or off only a part of the equipment circuit blocks}
- H04B 1/0003: {Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain (digital baseband systems H04L25/00; digital modulation/demodulation H04L27/00; CDMA H04B1/707; TDMA H04B7/2643; image transmission H04N5/00)}
- H04J 3/0685: {Clock or time synchronisation in a node; Intranode synchronisation}
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

A method and system for managing communications between sub-systems of a communication device. The sub-systems include a Radio Frequency Integrated Circuit (RFIC) and a Baseband Integrated Circuit (BBIC). The BBIC includes a processing engine, a state machine module and an interface module. The method includes initializing a Digital Radio Frequency Third Generation (DigRF3G) interface between the RFIC and the BBIC. The processing engine is kept functionally inactive during the initialization process of the DigRF3G interface. Further, the method includes exchanging one or more packets between the RFIC and the BBIC.

## Claims

### Claim 1

A method for managing communications between sub-systems of a communication device, the sub-systems of the communication device including a Baseband Integrated Circuit (BBIC) and a Radio Frequency Integrated Circuit (RFIC), the BBIC including a processing engine, a state machine module and an interface module, each of the BBIC and the RFIC including one or more Phase Locked Loops (PLLs), the method comprising:
initializing a Digital Radio Frequency Third Generation (DigRF3G) interface between the RFIC and the BBIC, wherein the processing engine is functionally inactive during the initialization; and
exchanging one or more data packets between the RFIC and the BBIC based on the initialization of the DigRF3G interface.

### Claim 2 (depends on 1)

The method for managing communications between the sub-systems of the communication device of claim 1, wherein initializing the DigRF3G interface comprises:
updating a state of the state machine module based on one or more predefined conditions, wherein the state machine module transitions between a plurality of states; and
generating set of control signals to initialize the DigRF3G interface, wherein each control signal of the set of control signals is generated corresponding to a state of the plurality of states of the state machine module, and wherein each control signal of the set of control signals is provided to at least one of the RFIC and the BBIC.

### Claim 3 (depends on 2)

The method for managing communications between the sub-systems of the communication device of claim 2, wherein the one or more predefined conditions include at least one of a waking up of the state machine module, stabilizing of a clock signal in the communication device, stabilizing conditions of the one or more PLLs, and one or more time constraints.

### Claim 4 (depends on 3)

The method for managing communications between the sub-systems of the communication device of claim 3, wherein generating the set of control signals comprises:
generating sets of enable signals and control messages to turn ON the one or more PLLs and to generate a clock signal; and
providing one or more control packets to the RFIC to facilitate the initializing of the DigRF3G interface and setting a communication path between the RFIC and the BBIC for exchanging the one or more data packets.

### Claim 5 (depends on 1)

The method for managing communications between the sub-systems of the communication device of claim 1, wherein exchanging the one or more data packets between the RFIC and the BBIC comprises:
exchanging the one or more data packets between the RFIC and the interface module; and
transferring the one or more data packets between the interface module and the processing engine.

### Claim 6

A system for managing communications between sub-systems of a communication device, the sub-systems of the communication device including a Baseband Integrated Circuit (BBIC) and a Radio Frequency Integrated Circuit (RFIC), the BBIC including a processing engine, each of the BBIC and the RFIC including one or more phase locked loops (PLLs), the system comprising:
a state machine module that updates its state based on one or more predefined conditions, wherein the state machine module has a plurality of states, and wherein each of the plurality of states is used to manage the communications between the sub-systems; and
an interface module connected to the state machine module that generates signals to initialize a communication interface between the RFIC and the BBIC.

### Claim 7 (depends on 6)

The system for managing communications of claim 6, wherein the communication interface includes a Digital Radio Frequency Third Generation (DigRF3G) interface.

### Claim 8 (depends on 6)

The system for managing communications of claim 6, wherein the one or more predefined conditions include at least one of a waking up of the state machine module, stabilizing of a clock generating unit, stabilizing conditions of the one or more PLLs and one or more time constraints imposed by at least one timer, wherein the at least one timer is coupled with the state machine module.

### Claim 9

A communication device comprising:
a radio frequency integrated circuit (RFIC); and
a baseband integrated circuit (BBIC), coupled to the RFIC, that processes one or more data packets, wherein the BBIC comprises:
a processing engine that processes the one or more data packets, wherein the processed data packets are intended to be used in the communication device;
a state machine module, coupled to the processing engine, that updates its state based on one or more predefined conditions, wherein the state machine module has a plurality of states; and
an interface module connected to the state machine module that generates a plurality of signals to facilitate communications between the BBIC and RFIC via initializing a communication interface, wherein the plurality of signals are generated based on a corresponding state of the plurality of states.

### Claim 10 (depends on 9)

The communication device of claim 9, wherein the communication interface includes a Digital Radio Frequency Third Generation (DigRF3G) interface.

### Claim 11 (depends on 9)

The communication device of claim 9, wherein the BBIC further comprises:
one or more Phase Locked Loops (PLLs), coupled with at least one of the state machine module and the interface module, that facilitate the exchange of the one or more data packets between the RFIC and the BBIC; and
at least one timer, coupled to the state machine module, that facilitates the initialization of the communication interface.

### Claim 12 (depends on 9)

The communication device of claim 9, wherein the RFIC comprises:
a clock generating unit to generate a clock signal, wherein the clock signal is used for the exchange of the one or more data packets; and
means for data exchange that exchange the one or more data packets with the BBIC.

### Claim 13 (depends on 12)

The communication device of claim 12, wherein the means for data exchange comprises at least one of a RF transceiver, at least one Phase Locked Loop (PLL), Timer circuits, BBIC-RFIC physical interface, and radio Frequency (RF) to Baseband conversion circuits.