Transmit power adjustment for inter-device communication in wireless communication systems
First Claim
1. A method for wireless communication, comprising:
- receiving an initiation message from a base station for initiating a device handshake procedure, wherein the initiation message from the base station is received using a device-to-device radio network temporary identity (DD-RNTI), and the DD-RNTI identifies an inter-device communication link;
after receiving the initiation message, transmitting, at a first user equipment (UE), a first sequence to a second UE over the inter-device communication link at a first transmission power level;
receiving, at the first UE, a response sequence from the second UE over the inter-device communication link;
determining, at the first UE, that the response sequence comprises a second sequence;
determining, at the first UE, that the second sequence is different than the first sequence;
determining, at the first UE, that a received signal quality of response sequence is acceptable;
in response to determining that the received signal quality of response sequence is acceptable, including the second sequence in a next transmission; and
in response to the determining that the second sequence is different than the first sequence, using the first transmission power level to transmit the next transmission to the second UE over the inter-device communication link.
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Accused Products
Abstract
Systems and methods for user equipment (UE) transmit power adjustment for inter-device communication in wireless communication systems are provided. A UE may communicate directly with another UE over a direct inter-device communication link when they are located in proximity. The UE may adjust its transmit power for the inter-device communication during a device handshake/discovery procedure. For example, the UE may adjust its transmit power for the inter-device communication based on a data exchange between the UE and the other UE over the inter-device communication link. Long term evolution (LTE) downlink or uplink radio resources may be used for the data exchange over the inter-device communication link.
72 Citations
22 Claims
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1. A method for wireless communication, comprising:
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receiving an initiation message from a base station for initiating a device handshake procedure, wherein the initiation message from the base station is received using a device-to-device radio network temporary identity (DD-RNTI), and the DD-RNTI identifies an inter-device communication link; after receiving the initiation message, transmitting, at a first user equipment (UE), a first sequence to a second UE over the inter-device communication link at a first transmission power level; receiving, at the first UE, a response sequence from the second UE over the inter-device communication link; determining, at the first UE, that the response sequence comprises a second sequence; determining, at the first UE, that the second sequence is different than the first sequence; determining, at the first UE, that a received signal quality of response sequence is acceptable; in response to determining that the received signal quality of response sequence is acceptable, including the second sequence in a next transmission; and in response to the determining that the second sequence is different than the first sequence, using the first transmission power level to transmit the next transmission to the second UE over the inter-device communication link. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A user equipment (UE), comprising:
one or more processors configured to; receive an initiation message from a base station for initiating a device handshake procedure, wherein the initiation message from the base station is received using a device-to-device radio network temporary identity (DD-RNTI), and the DD-RNTI identifies an inter-device communication link; transmit a first sequence to a second UE over the inter-device communication link at a first transmission power level; receive a response sequence from the second UE over the inter-device communication link; determine that the response sequence comprises a second sequence; determine that the second sequence is different than the first sequence; determine that a received signal quality of response sequence is acceptable; in response to determining that the received signal quality of response sequence is acceptable, include the second sequence in a next transmission; and in response to the determining that the second sequence is different than the first sequence, use the first transmission power level to transmit the next transmission to the second UE over the inter-device communication link. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
Specification