US 11,310,695 B2Granted

Multi-subframe discovery reference signaling (DRS) measurement timing configuration (DMTC) window

AssigneeQUALCOMM Incorporated

InventorsChih-Hao Liu, Srinivas Yerramalli, Arumugam Chendamarai Kannan, Tamer Kadous, Ahmed Kamel Sadek

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Abstract

In an embodiment, an access point executes a Clear Channel Assessment (CCA) protocol to determine whether to begin transmission within a DRS Measurement Timing Configuration (DMTC) window. The access point transmits, based on a result of the execution, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each includes a plurality of symbols.

Claims27

Dependent claims

A method of configuring a Discovery Reference Signaling (DRS) on a shared communication medium, comprising:

executing, by an access point (AP), a Clear Channel Assessment (CCA) protocol to determine whether to begin transmission within a DRS Measurement Timing Configuration (DMTC) window;
and
transmitting, by the AP based on a result of the executing, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each includes a plurality of symbols,
wherein a first scrambling is defined for a first set of subframes of the DMTC window and a second scrambling is defined for a second set of subframes of the DMTC window, and
wherein the transmitting scrambles the plurality of DRS subframes of the multi-subframe DRS in accordance with a fixed scrambling corresponding to the first scrambling irrespective of whether the plurality of DRS subframes are split between the first and second sets of subframes of the DMTC window, or wherein the transmitting scrambles the plurality of DRS subframes of the multi-subframe DRS in accordance with a fixed scrambling corresponding to the second scrambling irrespective of whether the plurality of DRS subframes are split between the first and second sets of subframes of the DMTC window,
wherein a given DRS subframe of the plurality of DRS subframes includes a set of extended Secondary Synchronization Signal (eSSS) repetitions,
wherein each eSSS specifies whether a starting position of a given DRS subframe that contains the eSSS within the multi-subframe DRS is in a first five subframes of the DMTC window or in a last five subframes of the DMTC window, and
wherein the fixed scrambling is a function of:
(i) a subframe position number of a first of the first five subframes within the DMTC window, or
(ii) a subframe position number of a second of the first five subframes of the given DRS subframe within the DMTC window, or
(iii) a subframe position number of a first of the last five subframes of the given DRS subframe within the DMTC window, or
(iv) a subframe position number of a second of the last five subframes of the given DRS subframe within the DMTC window.

9 more elements

An access point apparatus configured to transmit a Discovery Reference Signaling (DRS) on a shared communication medium, comprising:

means for executing, by the access point apparatus, a Clear Channel Assessment (CCA) protocol to determine whether to begin transmission within a DRS Measurement Timing Configuration (DMTC) window;
and
means for transmitting, by the access point apparatus based on a result of the execution, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each includes a plurality of symbols,
wherein a first scrambling is defined for a first set of subframes of the DMTC window and a second scrambling is defined for a second set of subframes of the DMTC window, and
wherein the means for transmitting scrambles the plurality of DRS subframes of the multi-subframe DRS in accordance with a fixed scrambling corresponding to the first scrambling irrespective of whether the plurality of DRS subframes are split between the first and second sets of subframes of the DMTC window, or wherein the transmitting scrambles the plurality of DRS subframes of the multi-subframe DRS in accordance with a fixed scrambling corresponding to the second scrambling irrespective of whether the plurality of DRS subframes are split between the first and second sets of subframes of the DMTC window,
wherein a given DRS subframe of the plurality of DRS subframes includes a set of extended Secondary Synchronization Signal (eSSS) repetitions,
wherein each eSSS specifies whether a starting position of a given DRS subframe that contains the eSSS within the multi-subframe DRS is in a first five subframes of the DMTC window or in a last five subframes of the DMTC window, and
wherein the fixed scrambling is a function of:
(i) a subframe position number of a first of the first five subframes within the DMTC window, or
(ii) a subframe position number of a second of the first five subframes of the given DRS subframe within the DMTC window, or
(iii) a subframe position number of a first of the last five subframes of the given DRS subframe within the DMTC window, or
(iv) a subframe position number of a second of the last five subframes of the given DRS subframe within the DMTC window.

9 more elements

An access point apparatus configured to transmit a Discovery Reference Signaling (DRS) on a shared communication medium, comprising:

at least one processor coupled to at least one transceiver and configured to cause the access point apparatus to:
execute, by the access point apparatus, a Clear Channel Assessment (CCA) protocol to determine whether to begin transmission within a DRS Measurement Timing Configuration (DMTC) window;
and
transmit, by the access point apparatus based on a result of the execution, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each includes a plurality of symbols,
wherein a first scrambling is defined for a first set of subframes of the DMTC window and a second scrambling is defined for a second set of subframes of the DMTC window, and
wherein the at least one processor is configured to scramble the plurality of DRS subframes of the multi-subframe DRS in accordance with a fixed scrambling corresponding to the first scrambling irrespective of whether the plurality of DRS subframes are split between the first and second sets of subframes of the DMTC window, or wherein the transmitting scrambles the plurality of DRS subframes of the multi-subframe DRS in accordance with a fixed scrambling corresponding to the second scrambling irrespective of whether the plurality of DRS subframes are split between the first and second sets of subframes of the DMTC window,
wherein a given DRS subframe of the plurality of DRS subframes includes a set of extended Secondary Synchronization Signal (eSSS) repetitions,
wherein each eSSS specifies whether a starting position of a given DRS subframe that contains the eSSS within the multi-subframe DRS is in a first five subframes of the DMTC window or in a last five subframes of the DMTC window, and
wherein the fixed scrambling is a function of:
(i) a subframe position number of a first of the first five subframes within the DMTC window, or
(ii) a subframe position number of a second of the first five subframes of the given DRS subframe within the DMTC window, or
(iii) a subframe position number of a first of the last five subframes of the given DRS subframe within the DMTC window, or
(iv) a subframe position number of a second of the last five subframes of the given DRS subframe within the DMTC window.

10 more elements

A non-transitory computer-readable storage medium containing instructions stored thereon, which, when executed by an access point apparatus configured to transmit a Discovery Reference Signaling (DRS) on a shared communication medium, cause the access point apparatus to perform operations, the instructions comprising:

at least one instruction configured to cause the access point apparatus to execute a Clear Channel Assessment (CCA) protocol to determine whether to begin transmission within a DRS Measurement Timing Configuration (DMTC) window;
and
at least one instruction configured to cause the access point apparatus to transmit, based on a result of the execution, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each includes a plurality of symbols,
wherein a first scrambling is defined for a first set of subframes of the DMTC window and a second scrambling is defined for a second set of subframes of the DMTC window, and
wherein the at least one instruction configured to cause the access point apparatus to transmit is further configured to cause the access point to scramble the plurality of DRS subframes of the multi-subframe DRS in accordance with a fixed scrambling corresponding to the first scrambling irrespective of whether the plurality of DRS subframes are split between the first and second sets of subframes of the DMTC window, or wherein the transmitting scrambles the plurality of DRS subframes of the multi-subframe DRS in accordance with a fixed scrambling corresponding to the second scrambling irrespective of whether the plurality of DRS subframes are split between the first and second sets of subframes of the DMTC window,
wherein a given DRS subframe of the plurality of DRS subframes includes a set of extended Secondary Synchronization Signal (eSSS) repetitions,
wherein each eSSS specifies whether a starting position of a given DRS subframe that contains the eSSS within the multi-subframe DRS is in a first five subframes of the DMTC window or in a last five subframes of the DMTC window, and
wherein the fixed scrambling is a function of:
(i) a subframe position number of a first of the first five subframes within the DMTC window, or
(ii) a subframe position number of a second of the first five subframes of the given DRS subframe within the DMTC window, or
(iii) a subframe position number of a first of the last five subframes of the given DRS subframe within the DMTC window, or
(iv) a subframe position number of a second of the last five subframes of the given DRS subframe within the DMTC window.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/886,400Filed 1 Feb 2018 · us provisional application
Priority: 3 Feb 2017
Published: US 2018/0227797 A19 Aug 2018
Granted: 19 Apr 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

H04W 28/06
Traffic management, e.g. flow control or congestion control: optimizing the usage of the radio link, e.g. header compression, information sizing ,…
H04L 5/005
Allocation of pilot signals, i.e. of signals known to the receiver: of common pilots, i.e. pilots destined for multiple users or terminals
H04L 5/0053
Arrangements for allocating sub-channels of the transmission path: allocation of signalling, i.e. of overhead other than pilot signals
H04W 72/0446
Based on the type of the allocated resource: resources in time domain, e.g. slots or frames

Family

Application62/454,656Us provisional application · filed 3 Feb 2017
US 2018/0227797 A1Pre-grant publication · published 9 Aug 2018
US 11,310,695 B2This patent

From the US filing history. Foreign family members aren’t listed.

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Abstract

A method of configuring a Discovery Reference Signaling (DRS) on a shared communication medium, comprising:

executing, by an access point (AP), a Clear Channel Assessment (CCA) protocol to determine whether to begin transmission within a DRS Measurement Timing Configuration (DMTC) window;
and
transmitting, by the AP based on a result of the executing, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each includes a plurality of symbols,
wherein a first scrambling is defined for a first set of subframes of the DMTC window and a second scrambling is defined for a second set of subframes of the DMTC window, and
wherein the transmitting scrambles the plurality of DRS subframes of the multi-subframe DRS in accordance with a fixed scrambling corresponding to the first scrambling irrespective of whether the plurality of DRS subframes are split between the first and second sets of subframes of the DMTC window, or wherein the transmitting scrambles the plurality of DRS subframes of the multi-subframe DRS in accordance with a fixed scrambling corresponding to the second scrambling irrespective of whether the plurality of DRS subframes are split between the first and second sets of subframes of the DMTC window,
wherein a given DRS subframe of the plurality of DRS subframes includes a set of extended Secondary Synchronization Signal (eSSS) repetitions,
wherein each eSSS specifies whether a starting position of a given DRS subframe that contains the eSSS within the multi-subframe DRS is in a first five subframes of the DMTC window or in a last five subframes of the DMTC window, and
wherein the fixed scrambling is a function of:
(i) a subframe position number of a first of the first five subframes within the DMTC window, or
(ii) a subframe position number of a second of the first five subframes of the given DRS subframe within the DMTC window, or
(iii) a subframe position number of a first of the last five subframes of the given DRS subframe within the DMTC window, or
(iv) a subframe position number of a second of the last five subframes of the given DRS subframe within the DMTC window.

9 more elements

Facts

Application

15/886,400Filed 1 Feb 2018 · us provisional application

Priority

3 Feb 2017

Published

US 2018/0227797 A19 Aug 2018

Granted

19 Apr 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification12 codes

H04W 28/06
Traffic management, e.g. flow control or congestion control: optimizing the usage of the radio link, e.g. header compression, information sizing ,…
H04L 5/005
Allocation of pilot signals, i.e. of signals known to the receiver: of common pilots, i.e. pilots destined for multiple users or terminals
H04L 5/0053
Arrangements for allocating sub-channels of the transmission path: allocation of signalling, i.e. of overhead other than pilot signals
H04W 72/0446
Based on the type of the allocated resource: resources in time domain, e.g. slots or frames