Deliberating retransmissions to avoid new hybrid automatic repeat requests (HARQ)

#Aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to tune away in multi-SIM devices.

#A wireless communication device, such as a mobile phone device or a smart phone, may include at least one Subscriber Identity Module (SIM). Each SIM may enable one or more subscriptions. Each subscription may correspond to a Radio Access Technology (RAT). Specifically, with respect to multi-SIM wireless communication devices, when all SIMs are active, the wireless communication device may be a Multi-SIM-Multi-Active (MSMA) device. On the other hand, when one SIM is active while the rest of the SIM(s) is/are standing by, the wireless communication device may be a Multi-SIM-Multi-Standby (MSMS) device. With Dual Sim, Dual Standby (DSDS) or Multi-SIM-Multi-Standby (MSMS) devices only one SIM is active because there is only one RF chain which is shared by the SIMs. The RATs may include, but are not limited to, Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA) (particularly, Evolution-Data Optimized (EVDO)), Universal Mobile Telecommunications Systems (UMTS) (particularly, Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), Single Radio LTE (SRLTE), Simultaneous GSM and LTE (SGLTE), High-Speed Downlink Packet Access (HSDPA), and the like), Code Division Multiple Access 1× Radio Transmission Technology (1×), General Packet Radio Service (GPRS), Wi-Fi, Personal Communications Service (PCS), and other protocols that may be used in a wireless communications network or a data communications network.

#Some wireless devices are configured to facilitate communication on two separate networks via two separate subscriptions. For instance, dual-subscriber identity module (SIM), dual standby (DSDS) devices may include two SIM cards—one card for a first subscription and a second card for a second subscription. Furthermore, each subscription may be associated with one or more technology types. For example, a first subscription may exclusively support 2G communication technology, such as Global System for Mobile Communications (GSM), while the second subscription may support one or more 3G communication technologies (e.g., Wideband Code Division Multiple Access (WCDMA)) and 2G communication technology.

#The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate exemplary embodiments of the disclosure, and together with the general description given above and the detailed description given below, serve to explain the features of the various embodiments.

#FIG. 1 is a schematic diagram illustrating an example of a communication system in which scheduling request throttling can be implemented in accordance with various embodiments.

#FIG. 2 is a component block diagram illustrating an example of a wireless communication device in which the scheduling request throttling can be implemented according to various embodiments.

#Various embodiments will be described in detail with reference to the accompanying drawings. Wherever possible, the same reference numbers may be used throughout the drawings to refer to the same or like parts. Different reference numbers may be used to refer to different, same, or similar parts. References made to particular examples and implementations are for illustrative purposes, and are not intended to limit the scope of the disclosure or the claims.

#The present disclosure presents methods and apparatuses for improved tune away in DSDS devices. Specifically, the present disclosure provides methods and apparatus for reducing potential delay in communication resulting from tune away by triggering fake NAK/Tx communications prior to the tune away period. By scheduling the fake NAK/Tx communications, the eNB retransmits data that it thinks was not received because of the fake NAK/Tx communication. The eNB receives a positive ACK after the tune away and when the retransmitted communications are received again.

#Generally, embodiments described herein may be applicable to an LTE wireless communication device in which out of two or more subscriptions, one subscription may be tuned into or active at a given time. Particularly, embodiments may related to a wireless communication device in which two or more subscriptions share a same Radio Frequency (RF) resource (RF resource sharing) and tune-aways are utilized to communicate with the subscriptions in a sequential manner, one at a time. Examples of combinations of subscriptions include, but are not limited to, LTE-and-1×, LTE-and-GSM, SRLTE-and-GSM, SGLTE-and-GSM, or the like.