Method and communication device for power savings in chip-to-chip signalling

• US 9,094,915 B2
• Filed: 02/16/2012
• Issued: 07/28/2015
• Est. Priority Date: 02/25/2011
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Olsson, Thomas, Carlsson, Anders, Lindoff, Bengt, Nilsson, Johan
• Primary Examiner(s): Wong, Warner
• Application Number:
  US14/000,616
• Publication Number:
  US 20140056195A1
• Time in Patent Office: 1,258 Days
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0001 Systems modifying transmission characteristics according to link quality, e.g. power backoff adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04
• CPC Class Codes: H04L 1/0006 by adapting the transmission format
• CPC Class Codes: H04W 52/0209 in terminal devices terminal devices per se H04W88/02
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method in a communication device and a communication device (100) for adapting a transmission of data are provided. The transmission is transferred from a first chip (110) to a second chip (120) over a chip-to-chip interface (104, 304). The chip-to-chip-interface comprises a wired connection between the first chip and the second chip which is comprised in the communication device. The communication device receives (201) the radio signal (330), comprising the transmission of data from another communication device. The communication device determines (202), from the received radio signal (330), modulation and coding information, which is used for determining (203) a channel quality. Further, the communication device (100) adapts (204) the transmission of data based on the determined channel quality of the received radio signal (330) in such way that at least the determined channel quality is obtained when transferring (205) the transmission of data over the chip-to-chip interface to the second chip.

Claims

1. A method in a communication device for adapting a transmission of data to be transferred from a first chip to a second chip over a chip-to-chip interface, wherein the chip-to-chip-interface comprises a wired connection between the first chip and the second chip comprised in the communication device, the method comprising:

receiving a radio signal comprising the transmission of data from another communication device;

determining modulation and coding information of the received radio signal;

determining a channel quality of the received radio signal based on the determined modulation and coding information;

adapting the transmission of data based on the determined channel quality of the received radio signal such that at least the determined channel quality is obtained when transferring the transmission of data; and

transferring the transmission of data over the chip-to-chip interface to the second chip,

wherein the received radio signal is an analog signal, and wherein the determining of the channel quality of the received radio signal is based on a signal to noise value of the received radio signal, and the adapting of the transmission of data such that at least the determined channel quality is obtained when transferring the transmission of data includes any of;

increasing load impedance to reduce the channel quality, or vice versa;

decreasing signal amplitude to reduce the analog signal, or vice versa; and

changing a slew-rate of the analogue signal to adapt the channel quality.

2. The method of claim 1, wherein the signal to noise value of the received radio signal is related to a predetermined threshold.

3. A method in a communication device for adapting a transmission of data to be transferred from a first chip to a second chip over a chip-to-chip interface, wherein the chip-to-chip-interface comprises a wired connection between the first chip and the second chip comprised in the communication device, the method comprising:

receiving a radio signal comprising the transmission of data from another communication device;

determining modulation and coding information of the received radio signal;

determining a channel quality of the received radio signal based on the determined modulation and coding information;

adapting the transmission of data based on the determined channel quality of the received radio signal such that at least the determined channel quality is obtained when transferring the transmission of data; and

transferring the transmission of data over the chip-to-chip interface to the second chip,

wherein the received radio signal is a digital communication signal, and wherein the adapting the transmission of data over the chip-to-chip interface is performed by adjusting an amount of bits per sample of the transmission of data and the transferring of the transmission of data is performed while using a clock rate being adjusted to match the adjusted amount of bits.

4. The method of claim 3, wherein the adjusting of the amount of bits per sample is performed by increasing or decreasing the amount of bits in relation to a predetermined threshold.

5. The method of claim 4, wherein the adjusting of the amount of bits is made to the received radio signal after or in an analog-digital converter.

6. A communication device for adapting a transmission of data to be transferred from a first chip to a second chip over a chip-to-chip interface, which chip-to-chip interface is a wired connection between the first chip and the second chip within the communication device, the communication device comprising:

a radio receiver configured to receive a radio signal comprising the transmission of data;

a processing circuit configured to determine modulation and coding information of the received radio signal, wherein the processing circuit further is configured to determine channel quality of the received radio signal based on the determined modulation and coding information, wherein the processing circuit further is configured to adapt the transmission of data based on the determined channel quality of the received radio signal such that at least the determined channel quality is obtained when transferring the transmission of data; and

the processing circuit configured to transfer the transmission of data over the chip-to-chip interface to the second chip,

wherein the received radio signal is an analog signal, and wherein the processing circuit is configured to determine the channel quality of the radio signal based on a signal to noise value for the radio signal and the adaption of the transmission of data such that at least the determined channel quality is obtained when transferring the transmission of data includes any of;

increasing load impedance to reduce the channel quality, or vice versa;

decreasing signal amplitude to reduce the analogue signal, or vice versa; and

changing a slew-rate of the analogue signal to adapt the channel quality.

7. A communication device for adapting a transmission of data to be transferred from a first chip to a second chip over a chip-to-chip interface, which chip-to-chip interface is a wired connection between the first chip and the second chip within the communication device, the communication device comprising:

a radio receiver configured to receive a radio signal comprising the transmission of data;

a processing circuit configured to determine modulation and coding information of the received radio signal, wherein the processing circuit further is configured to determine channel quality of the received radio signal based on the determined modulation and coding information, wherein the processing circuit further is configured to adapt the transmission of data based on the determined channel quality of the received radio signal such that at least the determined channel quality is obtained when transferring the transmission of data; and

the processing circuit configured to transfer the transmission of data over the chip-to-chip interface to the second chip,

wherein the received radio signal is a digital communication signal, and wherein the processing circuit further is configured to adapt the channel quality over the chip-to-chip interface by adjusting an amount of bits per sample of the digital communication signal to be transmitted and the transferring of the transmission of data is performed while using a clock rate being adjusted to match the adjusted amount of bits.

8. The communication device of claim 7, wherein the processing circuit further is configured to increase or decrease the amount of bits in relation to a predetermined threshold.