Determination of geographic ranges in sidelink communications introduction

An apparatus, comprising:

• a memory;
• at least one processor communicatively coupled to the memory and at least one transceiver, the at least one processor configured to:
• determine a current Geographic Latitude and Longitude (GLL);
• select a current entry of Zone data from an indexed array based on a two-dimensional (2-D) lookup into the indexed array using the current GLL, the indexed array stored in the memory and configured to store one or more entries of Zone data for one or more geographic Zones, each entry of Zone data for a corresponding geographic Zone in the indexed array including a Zone identifier (ID) of the corresponding geographic Zone, a Zone center of the corresponding geographic Zone, and one or more other Zone IDs indicating one or more other geographic Zones associated with the one or more other Zone IDs being within one or more respective negative-acknowledgement (NACK) ranges to the corresponding geographic Zone;
• and
• perform a NACK operation with a transmitting UE based on a Zone ID of the transmitting UE matching one of the one or more other Zone IDs in the selected current entry of Zone data;
• and
• the at least one transceiver configured to:
• receive a location indication of the transmitting UE;
• and
• perform the NACK operation with the transmitting UE.

An apparatus, comprising:

• means for determining, at a receiving user equipment (UE), a current Geographic Latitude and Longitude (GLL) of the receiving UE;
• means for selecting a current entry of Zone data from an indexed array based on a two-dimensional (2-D) lookup into the indexed array using the current GLL, the indexed array configured to store one or more entries of Zone data for one or more geographic Zones, each entry of Zone data for a corresponding geographic Zone including a Zone identifier (ID) of the corresponding geographic Zone, a Zone center of the corresponding geographic Zone, and one or more other Zone IDs indicating one or more other geographic Zones associated with the one or more other Zone IDs being within one or more respective negative-acknowledgement (NACK) ranges to the corresponding geographic Zone;
• and
• means for performing a NACK operation with a transmitting UE based on a Zone ID of the transmitting UE matching one of the one or more other Zone IDs in the selected current entry of Zone data.

A non-transitory computer readable storage medium comprising code, which when executed by a computer, causes the computer to perform operations for wireless communication, the non-transitory computer readable storage medium comprising:

• code for determining, for a receiving user equipment (UE) in a vehicle, a current Geographic Latitude and Longitude (GLL) of the receiving UE;
• code for selecting, at the receiving UE, a current entry of Zone data from an indexed array based on a two-dimensional (2-D) lookup into the indexed array using the current GLL, the indexed array configured to store one or more entries of Zone data for one or more geographic Zones, each entry of Zone data for a corresponding geographic Zone including a Zone ID of the corresponding geographic Zone, a Zone center of the corresponding geographic Zone, and one or more other Zone IDs indicating one or more other geographic Zones associated with the one or more other Zone IDs being within one or more respective negative-acknowledgement (NACK) ranges to the corresponding geographic Zone;
• code for receiving, at the receiving UE, a location indication of a transmitting UE;
• and
• code for performing a NACK operation with the transmitting UE based on a Zone ID of the transmitting UE matching one of the one or more other Zone IDs in the selected current entry of Zone data.