Systems and methods for reducing connection latency
AssigneeGoogle Inc.
InventorsLiang-Yun Wang, Martin Ünsal
Life of this patent
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Abstract
Systems and methods for reducing connection latency are described herein. More particularly, this specification relates to shortening connection latency between devices operating according to a Bluetooth protocol. Connection latency can be reduced by using the receipt of a wireless packet as a trigger for selectively accelerating a transmission rate of advertising packets. By selectively accelerating the transmission rate advertising packets, a connection interval between two devices can be shortened.
Claims12
A method, comprising:
- receiving, at a central device, a first type of packet from a peripheral device, wherein the peripheral device is operating according to a first mode that transmits the first type of packet according to a first frequency, the first frequency comprising a first period characterized by a start time and a first end time;
- transmitting, from the central device, a second type of packet in response to receipt of the first type of packet, wherein the peripheral device temporarily operates according to a second mode in response to receiving the second type of packet, wherein in the second mode the first type of packets is transmitted according to a second frequency that is greater than the first frequency, the second frequency comprising a second period characterized by the same start time as the first period and a second end time, wherein the second end time is less than the first end time.
A central device, comprising:
- a wireless transceiver;
- and
- control circuitry coupled to the wireless transceiver and operative to cause the wireless transceiver to send and receive wireless packets, the control circuitry operative to:
- receive a first type of packet from a peripheral device, wherein the peripheral device is operating according to a first mode that transmits the first type of packet according to a first frequency, the first frequency comprising a first period characterized by a start time and a first end time;
- transmit a second type of packet in response to receipt of one of the first type of packet, wherein the peripheral device temporarily operates according to a second mode in response to receiving the second type of packet, wherein in the second mode the first type of packets are transmitted according to a second frequency that is greater than the first frequency, the second frequency comprising a second period characterized by the same start time as the first period and a second end time, wherein the second end time is less than the first end time.
A method for establishing low latency connection between central and peripheral devices, the method implemented by the central device, comprising:
- wirelessly receiving a first type of packet to alert presence of the peripheral device to the central device, wherein the first type of packet is wirelessly transmitted by the peripheral device according to a first transmission rate, the first transmission rate comprising a first period characterized by a start time and a first end time;
- wirelessly transmitting a second type of packet to the peripheral device in response to receipt of the first type of packet;
- after transmitting the second type of packet, wirelessly receiving the first type of packet according to a second transmission rate, the second transmission rate comprising a second period characterized by the same start time as the first period and a second end time, wherein the second end time is less than the first end time, and wherein the peripheral device adjusts a transmission rate for transmitting the first type of packet based on whether the second type of packet is received in response to the transmitted first type of packet, wherein the transmission rate is temporarily accelerated in response to receiving the second type of packet.
Dependencies are inferred from the claim text.