CSI-RS scrambling of subframes in a multi-subframe DRS

A method of configuring channel state information reference signals (CSI-RSs) on a shared communication medium, comprising

• executing a Clear Channel Assessment (CCA) protocol to determine whether to begin transmission within a Discovery Reference Signaling (DRS) Measurement Timing Configuration (DMTC) window of a Radio Frame that includes a first block of subframes and a second block of subframes;
• transmitting, based on the executing, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each include a plurality of symbols;
• and
• scrambling CSI-RSs in first and second DRS subframes of the multi-subframe DRS in accordance with a CSI-RS scrambling rule that determines how the second DRS subframe is to be scrambled based on whether the first DRS subframe is included among the first block of subframes or the second block of subframes,
• wherein the CSI-RS scrambling rule is a fixed CSI-RS scrambling rule that uses the same scrambling for both the first and second DRS subframes,
• wherein the first DRS subframe is included among the second block of subframes, and
• wherein, based on the fixed CSI-RS scrambling rule, the scrambling scrambles both the first and second DRS subframes in accordance with scrambling that is defined for an initial block of the second block of subframes.

A method of configuring channel state information reference signals (CSI-RSs) on a shared communication medium, comprising:

• executing a Clear Channel Assessment (CCA) protocol to determine whether to begin transmission within a Discovery Reference Signaling (DRS) Measurement Timing Configuration (DMTC) window of a Radio Frame that includes a first block of subframes and a second block of subframes;
• transmitting, based on the executing, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each include a plurality of symbols;
• and
• scrambling CSI-RSs in first and second DRS subframes of the multi-subframe DRS in accordance with a CSI-RS scrambling rule that determines how the second DRS subframe is to be scrambled based on whether the first DRS subframe is included among the first block of subframes or the second block of subframes,
• wherein the first DRS subframe is transmitted on an initial block of the second block of subframes,
• wherein the second DRS subframe is transmitted on a second block of the second block of subframes, and
• wherein, based on the CSI-RS scrambling rule,
• the scrambling scrambles the second DRS subframe in accordance with scrambling that is defined for the second block of the second block of subframes, or
• the scrambling scrambles the second DRS subframe in accordance with scrambling that is defined for an initial block of the first block of subframes.

A method of obtaining channel state information reference signals (CSI-RSs) on a shared communication medium, comprising:

• monitoring a Discovery Reference Signaling (DRS) Measurement Timing Configuration (DMTC) window of a Radio Frame that includes a first block of subframes and a second block of subframes;
• receiving, based on the monitoring, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each include a plurality of symbols;
• and
• descrambling CSI-RSs in first and second DRS subframes of the multi-subframe DRS in accordance with a CSI-RS descrambling rule that determines how the second DRS subframe is to be descrambled based on whether the first DRS subframe is included among the first block of subframes or the second block of subframes,
• wherein the CSI-RS descrambling rule is a fixed CSI-RS descrambling rule that uses the same descrambling for both the first and second DRS subframes,
• wherein the first DRS subframe is included among the first block of subframes, and
• wherein, based on the fixed CSI-RS descrambling rule, the descrambling descrambles both the first and second DRS subframes in accordance with descrambling that is defined for an initial block of the first block of subframes.

A method of obtaining channel state information reference signals (CSI-RSs) on a shared communication medium, comprising:

• monitoring a Discovery Reference Signaling (DRS) Measurement Timing Configuration (DMTC) window of a Radio Frame that includes a first block of subframes and a second block of subframes;
• receiving, based on the monitoring, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each include a plurality of symbols;
• and
• descrambling CSI-RSs in first and second DRS subframes of the multi-subframe DRS in accordance with a CSI-RS descrambling rule that determines how the second DRS subframe is to be descrambled based on whether the first DRS subframe is included among the first block of subframes or the second block of subframes,
• wherein the CSI-RS descrambling rule is a fixed CSI-RS descrambling rule that uses the same descrambling for both the first and second DRS subframes,
• wherein the first DRS subframe is included among the second block of subframes, and
• wherein, based on the fixed CSI-RS descrambling rule, the descrambling descrambles both the first and second DRS subframes in accordance with descrambling that is defined for an initial block of the second block of subframes.

A method of obtaining channel state information reference signals (CSI-RSs) on a shared communication medium, comprising:

• monitoring a Discovery Reference Signaling (DRS) Measurement Timing Configuration (DMTC) window of a Radio Frame that includes a first block of subframes and a second block of subframes;
• receiving, based on the monitoring, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each include a plurality of symbols;
• and
• descrambling CSI-RSs in first and second DRS subframes of the multi-subframe DRS in accordance with a CSI-RS descrambling rule that determines how the second DRS subframe is to be descrambled based on whether the first DRS subframe is included among the first block of subframes or the second block of subframes,
• wherein the first DRS subframe is received on an initial block of the first block of subframes,
• wherein the second DRS subframe is received on a second block of the first block of subframes, and
• wherein, based on the CSI-RS descrambling rule,
• the descrambling descrambles the second DRS subframe in accordance with descrambling that is defined for the second block of the first block of subframes, or
• the descrambling descrambles the second DRS subframe in accordance with descrambling that is defined for an initial block of the second block of subframes.

A method of obtaining channel state information reference signals (CSI-RSs) on a shared communication medium, comprising:

• monitoring a Discovery Reference Signaling (DRS) Measurement Timing Configuration (DMTC) window of a Radio Frame that includes a first block of subframes and a second block of subframes;
• receiving, based on the monitoring, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each include a plurality of symbols;
• and
• descrambling CSI-RSs in first and second DRS subframes of the multi-subframe DRS in accordance with a CSI-RS descrambling rule that determines how the second DRS subframe is to be descrambled based on whether the first DRS subframe is included among the first block of subframes or the second block of subframes,
• wherein the first DRS subframe is transmitted on an initial block of the second block of subframes,
• wherein the second DRS subframe is transmitted on a second block of the second block of subframes, and
• wherein, based on the CSI-RS scrambling rule,
• the scrambling scrambles the second DRS subframe in accordance with scrambling that is defined for the second block of the second block of subframes, or
• the descrambling descrambles the second DRS subframe in accordance with descrambling that is defined for an initial block of the first block of subframes.

An access point for configuring channel state information reference signals (CSI-RSs) on a shared communication medium, comprising:

• means for executing a Clear Channel Assessment (CCA) protocol to determine whether to begin transmission within a Discovery Reference Signaling (DRS) Measurement Timing Configuration (DMTC) window of a Radio Frame that includes a first block of subframes and a second block of subframes;
• means for transmitting, based on the executing, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each include a plurality of symbols;
• and
• means for scrambling CSI-RSs in first and second DRS subframes of the multi-subframe DRS in accordance with a CSI-RS scrambling rule that determines how the second DRS subframe is to be scrambled based on whether the first DRS subframe is included among the first block of subframes or the second block of subframes,
• wherein the CSI-RS scrambling rule is a fixed CSI-RS scrambling rule that uses the same scrambling for both the first and second DRS subframes,
• wherein the first DRS subframe is included among the first block of subframes, and wherein, based on the fixed CSI-RS scrambling rule, the means for scrambling scrambles both the first and second DRS subframes in accordance with scrambling that is defined for an initial block of the first block of subframes.

A user equipment (UE) configured to obtain channel state information reference signals (CSI-RSs) on a shared communication medium, comprising:

• means for monitoring a Discovery Reference Signaling (DRS) Measurement Timing Configuration (DMTC) window of a Radio Frame that includes a first block of subframes and a second block of subframes;
• means for receiving, based on the monitoring, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each include a plurality of symbols;
• and
• means for descrambling CSI-RSs in first and second DRS subframes of the multi-subframe DRS in accordance with a CSI-RS descrambling rule that determines how the second DRS subframe is to be descrambled based on whether the first DRS subframe is included among the first block of subframes or the second block of subframes,
• wherein the CSI-RS descrambling rule is a fixed CSI-RS descrambling rule that uses the same descrambling for both the first and second DRS subframes,
• wherein the first DRS subframe is included among the first block of subframes, and
• wherein, based on the fixed CSI-RS descrambling rule, the means for descrambling descrambles both the first and second DRS subframes in accordance with descrambling that is defined for an initial block of the first block of subframes.

An access point for configuring channel state information reference signals (CSI-RSs) on a shared communication medium, comprising:

• a memory;
• at least one transceiver;
• and
• at least one processor coupled to the memory and the at least one transceiver and configured to:
• execute a Clear Channel Assessment (CCA) protocol to determine whether to begin transmission within a Discovery Reference Signaling (DRS) Measurement Timing Configuration (DMTC) window of a Radio Frame that includes a first block of subframes and a second block of subframes;
• transmit, based on the execution, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each include a plurality of symbols;
• and
• scramble CSI-RSs in first and second DRS subframes of the multi-subframe DRS in accordance with a CSI-RS scrambling rule that determines how the second DRS subframe is to be scrambled based on whether the first DRS subframe is included among the first block of subframes or the second block of subframes,
• wherein the CSI-RS scrambling rule is a fixed CSI-RS scrambling rule that uses the same scrambling for both the first and second DRS subframes,
• wherein the first DRS subframe is included among the second block of subframes, and
• wherein, based on the fixed CSI-RS scrambling rule, the at least one processor is configured to scramble both the first and second DRS subframes in accordance with scrambling that is defined for an initial block of the second block of subframes.

A user equipment (UE) configured to obtain channel state information reference signals (CSI-RSs) on a shared communication medium, comprising:

• a memory;
• at least one transceiver;
• and
• at least one processor coupled to the memory and the at least one transceiver and configured to:
• monitor a Discovery Reference Signaling (DRS) Measurement Timing Configuration (DMTC) window of a Radio Frame that includes a first block of subframes and a second block of subframes;
• receive, based on the monitoring, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each include a plurality of symbols;
• and
• descramble CSI-RSs in first and second DRS subframes of the multi-subframe DRS in accordance with a CSI-RS descrambling rule that determines how the second DRS subframe is to be descrambled based on whether the first DRS subframe is included among the first block of subframes or the second block of subframes,
• wherein the CSI-RS descrambling rule is a fixed CSI-RS descrambling rule that uses the same descrambling for both the first and second DRS subframes,
• wherein the first DRS subframe is included among the second block of subframes, and
• wherein, based on the fixed CSI-RS descrambling rule, the at least one processor is configured to descramble both the first and second DRS subframes in accordance with descrambling that is defined for an initial block of the second block of subframes.

A non-transitory computer-readable medium containing instructions stored thereon, which, when executed by an access point for configuring channel state information reference signals (CSI-RSs) on a shared communication medium, cause the access point to perform operations, the instructions comprising:

• at least one instruction to cause the access point to execute a Clear Channel Assessment (CCA) protocol to determine whether to begin transmission within a Discovery Reference Signaling (DRS) Measurement Timing Configuration (DMTC) window of a Radio Frame that includes a first block of subframes and a second block of subframes;
• at least one instruction to cause the access point to transmit, based on the execution, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each include a plurality of symbols;
• and
• at least one instruction to cause the access point to scramble CSI-RSs in first and second DRS subframes of the multi-subframe DRS in accordance with a CSI-RS scrambling rule that determines how the second DRS subframe is to be scrambled based on whether the first DRS subframe is included among the first block of subframes or the second block of subframes,
• wherein the CSI-RS scrambling rule is a fixed CSI-RS scrambling rule that uses the same scrambling for both the first and second DRS subframes,
• wherein the first DRS subframe is included among the first block of subframes, and
• wherein, based on the fixed CSI-RS scrambling rule, the at least one instruction to cause the access point to scramble is configured to cause the access point to scramble both the first and second DRS subframes in accordance with scrambling that is defined for an initial block of the first block of subframes.

A non-transitory computer-readable medium containing instructions stored thereon, which, when executed by a user equipment (UE) configured to obtain channel state information reference signals (CSI-RSs) on a shared communication medium, cause the access point to perform operations, the instructions comprising:

• at least one instruction to cause the UE to monitor a Discovery Reference Signaling (DRS) Measurement Timing Configuration (DMTC) window of a Radio Frame that includes a first block of subframes and a second block of subframes;
• at least one instruction to cause the UE to receive, based on the monitoring, a multi-subframe DRS within the DMTC window, the multi-subframe DRS including a plurality of DRS subframes that each include a plurality of symbols;
• and
• at least one instruction to cause the UE to descramble CSI-RSs in first and second DRS subframes of the multi-subframe DRS in accordance with a CSI-RS descrambling rule that determines how the second DRS subframe is to be descrambled based on whether the first DRS subframe is included among the first block of subframes or the second block of subframes,
• wherein the CSI-RS descrambling rule is a fixed CSI-RS descrambling rule that uses the same descrambling for both the first and second DRS subframes,
• wherein the first DRS subframe is included among the first block of subframes, and
• wherein, based on the fixed CSI-RS descrambling rule, the at least one instruction to cause the UE to descramble is configured to cause the UE to descramble both the first and second DRS subframes in accordance with descrambling that is defined for an initial block of the first block of subframes.