公开(公告)号：US20190213166A1

公开(公告)日：2019-07-11

申请号：US15865638

申请日：2018-01-09

Applicant: Apple Inc.

Inventor： VLADISLAV PETKOV ,  SAURABH GARG ,  KARAN SANGHI ,  HAINING ZHANG

IPC: G06F15/17 ,  H04W4/80 ,  G06F13/42

Abstract: Methods and apparatus for data transmissions over an inter-processor communication (IPC) link between two (or more) independently operable processors. In one embodiment, the IPC link is configured to enable an independently operable processor to transact data to another independently operable processor, while obviating transactions (such as via direct memory access) by encapsulating a payload within a data structure. For example, a host processor may insert the payload into a transfer descriptor (TD), and transmit the TD to a peripheral processor. The host processor may also include a head index and/or a tail index within a doorbell message sent to the peripheral processor, obviating another access of memory. The peripheral processor may perform similar types of transactions via a completion descriptor (CD) sent to the host processor. In some variants, the peripheral may be a Bluetooth-enabled device optimized for low-latency, low-power, and/or low-throughput transactions.