Qualcomm Incorporated

Alok Mitra

Vaibhav Kumar

Sitaramanjaneyulu Kanamarlapudi

Vamsi Dokku

Arnaud Meylan

Uppinder Singh Babbar

Shailesh Maheshwari

Hariharan Sukumar

Arunn Coimbatore Krishnamurthy

Vanitha Aravamudhan Kumar

Srinivas Reddy Mudireddy

Suli Zhao

Feilu Liu

Vinod Harimohan Kaushik

Neven Klacar

Roshan Thomas Pius

Muralidhar Coimbatore Krishnamoorthy

Andrei Danaila

Amir Farajidana

Venkata Satish Kumar Vangala

Liping Shen

Rohit Tripathi

Haim Snapy

Rushil Gholap

Reza Shahidi

Amir Aminzadeh Gohari

Sivaramakrishna Veerepalli

Thomas Klingenbrunn

Bao Vinh Nguyen

Gang Xiao

Daisuke Terasawa

Nishith Chaubey

Gurvinder Singh Chhabra

Rajashekar Chilla

Vaishakh Rao

Vinay Paradkar

Can Zhao

Priyangshu Ghosh

Umang Sureshbhai Patel

Mathias Kohlenz

Vinod Vijayarajan

Joseph Giacalone

Ravi Balasubramanian

Sandeep Urgaonkar

Aditya Namjoshi

Ajay Venkatsuresh

Xinli Song

Subash Abhinov Kasiviswanathan

Dan Gilboa Waizman

Siddharth Gupta

Iain Finlay

Sujit Nair

Vinesh Tarphe

Mohammed M Rumi

Gautam Sheoran

Sirin Nitinawarat

Nehal Somani

Vishal Sheth

Hyun Seung Paik

Mohammed Ali

Narender Mannem

Darshan Ashar

Yogesh Kumar Sadhu

Rissen Alfonso Joseph

Aravindh Suriyamoorthy

Harimohan Kaushik Vinod

Aspects disclosed in the detailed description include power saving techniques in computing devices. In particular, as data is received by a modem processor in a computing device, the data is held until the expiration of a modem timer. The data is then passed to an application processor in the computing device over a peripheral component interconnect express (PCIe) interconnectivity bus. On receipt of the data from the modem processor, the application processor sends data held by the application processor to the modem processor over the PCIe interconnectivity bus. The application processor also has an uplink timer. If no data is received from the modem processor before expiration of the uplink timer, the application processor sends any collected data to the modem processor at expiration of the uplink timer. However, if data is received from the modem processor, the uplink timer is reset.

Power saving techniques in computing devices

Various embodiments include methods of managing mixed data flow types in communications in a network apparatus. The network apparatus may determine data flow priority levels of a plurality of data flows, identify high-priority data flows associated with a particular LAN interface, and assign a designated public IP address range or a designated public port range for the high-priority data. Upon receiving an uplink, the apparatus may select a source port number from the previously reserved range dedicated for high-priority data flows in response to the received packet matching one or more prioritized data flow packet filters, modify the received uplink packet, and forward the modified uplink packet to the next hop in the path towards the destination IP address in response to determining that the packet is enqueued successfully.

Prioritizing data flows

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a device may receive, at a modem of the device, a plurality of data packets associated with one or more connections. The device may group, at the modem of the device, data packets, of the plurality of data packets, associated with a connection, of the one or more connections, into a container based at least in part on one or more characteristics associated with the modem or the data packets. The device may transmit, from the modem to a processor of the device, the container of grouped data packets. Numerous other aspects are provided.

Grouping data packets at a modem

A configuration to enable a UE to send data to a modem, from an AP, in the absence of an uplink grant from the modem. An apparatus receives data transmissions from a base station. The apparatus stores the data transmissions in a memory of the AP of the apparatus. The apparatus identifies, by the AP, an uplink grant based at least in part on a size of a modem buffer. The apparatus determines, by the application processor, whether to send data to the modem based at least in part on the identified uplink grant. The apparatus sends, by the AP, the data when the identified uplink grant exceeds a threshold.

System and method for flow control and acknowledgement transmission

This disclosure provides a method, apparatus, and computer-readable medium for wireless communication at a modem, comprising receiving, via an interface with a host, an internet protocol (IP) packet including a first transport protocol header and a first IP header. The IP packet has a size greater than a maximum transport unit (MTU) size allowable for each packet transmitted over a communication link. The modem segments the IP packet into a plurality of segments based on a segment size indicated by a segmentation policy. Each segment includes a respective derived segment transport protocol header and a respective derived segment IP header derived from the IP packet. Each of these derived headers includes at least one field based on the segmentation policy, and each of the segment transport protocol headers includes a checksum for the respective segment. Additionally, the modem transmits the plurality of segments over the communication link.

Uplink segmentation offload to modem

Aspects described herein relate to instructing, from a layer of a modem processor, a host processor to utilize an increased power consumption state for processing data from a network node. The instructing can be performed based on transmitting a signal to the network node and/or receiving signals from the network node, and at a time that allows the host processor to wake up before receiving data from the modem processor for processing.

Techniques for improving power consumption state latency in wireless communications

Methods, systems, and devices for wireless communication are described. A data layer at a user equipment (UE) may provide information associated with an uplink message to a modem power manager to determine whether to keep resources which are brought up by the scheduler or to power them off for transmitting the uplink message. For example, the data layer may indicate a radio access technology, a subscriber identifier, and a bearer type associated with the uplink message, which may enable the modem power manager to identify which radios to wake up (e.g., or avoid putting to sleep). Utilizing the information may enable the modem power manager to determine whether the wakeup is related to uplink data, acquire information to support the wakeup with resources indicated by the information, and avoid putting resources to sleep if the scheduled and the unscheduled wakeup resource requirements match.

Techniques for reducing wakeup latency

In a wireless network, a user equipment (UE) may support reflective quality of service (QoS), where QoS applied to uplink packets is implicitly derived from downlink packets. For example, when the UE receives a downlink packet that includes a reflective QoS (RQoS) indicator and a QoS flow identifier (QFI), the UE may apply the same QoS associated with the downlink packet to an uplink packet with one or more attributes that match the downlink packet. However, for a received downlink encapsulating security payload (ESP) packet that includes an RQoS indicator and a QFI, a modem cannot determine an uplink security parameters index (SPI) and downlink SPI pairing needed to enable RQoS because the uplink/downlink SPI pairing is known only by the upper layer. Accordingly, some aspects described herein enable the modem to learn uplink/downlink SPI pairings for ESP packets and thereby enable RQoS for ESP packets.

Reflective quality of service for encapsulating security payload packets

Some aspects of the present disclosure disclose methods and systems for managing transmission control protocol (TCP) acknowledgements (ACK) transmissions from a host or application processor to a modem of a user equipment. The UE may detect availability of buffer space in a memory buffer of a modem of the UE. Further, the UE may also detect that a host processor of the UE lacks credit sufficient for transmitting data from the host processor to the modem. The UE may then generate and transmit to the host processor a data flow control (DFC) command including credit sufficient for the host processor to transmit at least a portion of the data to the modem. In some instances, in response to the transmission of the DFC command, the at least the portion of the data may be received at the modem from the host processor.

Systems and methods for managing transmission control protocol (TCP) acknowledgement (ACK) transmissions

Certain aspects of the present disclosure provide a technique executed by a user equipment (UE) for obtaining a burst of transmission control protocol (TCP) packets conveying packet data convergence protocol (PDCP) protocol data units (PDUs) by an application protocol TCP layer of a communication protocol stack of the UE. The UE may then determine a first number of a first plurality of acknowledge (ACK) tokens to transmit in a first transmission time interval (TTI) based on an amount of data used to ACK the burst of TCP packets. The UE may then transmit the first plurality of ACK tokens in the first TTI and a single ACK token in a second TTI subsequent to the first TTI.

Acknowledgment shaping for downlink data bursts

Methods, systems, and devices for wireless communications are described in which a host processor at a user equipment (UE) may packetize data for uplink transmissions from the UE and provide packets to a wireless modem of the UE for uplink transmission. The host processor may provide multiplexing and aggregation headers for the packets that include a prioritization indication, and the wireless modem may order the data packets for transmission based at least in part on the prioritization indication. In some cases, a priority for each packet is indicated in a priority field of a corresponding multiplexing and aggregation header. The wireless modem may transmit the data packets based on the ordering, to provide higher priority packets ahead of lower priority packets to a receiver. Additionally, data packets may be further ordered based on tuple information associated with the data packets.

Host driven modem uplink packet prioritization

Wireless communications systems and methods related to uplink buffer management are provided. In some aspects, a user equipment receives a synchronization acknowledgment message destined for a device tethered to the user equipment and transmitted by an application server at a network to which the user equipment is connected. In some aspects, the synchronization acknowledgment message includes an application server receiver window size indicating available buffer space in a receive buffer of the application server. The user equipment can modify the application server receiver window size in the received synchronization acknowledgment message prior to transmitting the received synchronization acknowledgment to the tethered device.

Methods and system for managing uplink buffer at user equipment in tethered call mode

Certain aspects of the present disclosure provide techniques for implementing reflective quality of service (RQoS) in wireless communication systems. A method for implementing RQoS that may be performed by a user equipment (UE) generally includes receiving a plurality of downlink user data packets from a first base station (BS), determining at least one reflective quality of service (RQoS) mapping rule for one or more uplink packet transmissions based on a subset of the plurality of downlink user data packets, filtering the plurality of downlink user data packets based on the at least one RQoS mapping rule, and forwarding the plurality of downlink user data packets to a corresponding application entity of the UE based on the filtering.

Techniques for improving reflective quality of service

Growing community of inventors

San Diego, CA, United States of America

Alok Mitra