Mac subheader for d2d broadcast communication for public safety

Abstract

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus configures at least a non-access stratum (NAS) protocol layer or a radio resource control (RRC) protocol layer to enable device-to-device (D2D) communication with at least a second apparatus when the apparatus is out of network coverage, and communicates with at least the second apparatus.

What is claimed is: 
     
         1 . A method of wireless communication for a first user equipment (UE), comprising:
 determining that an application associated with public safety is initiated;   configuring a radio resource control (RRC) protocol layer for device-to-device (D2D) broadcast communication based on initiation of the application associated with public safety;   configuring one or more protocol layers for broadcast operation based on configuring the RRC protocol layer for the D2D broadcast communication, the one or more protocol layers being lower than the RRC protocol layer; and   communicating with at least a second UE based on the one or more protocol layers being configured for the broadcast operation.   
     
     
         2 . The method of  claim 1 , further comprising:
 configuring a non-access stratum (NAS) protocol layer based on the initiation of the application associated with public safety,   wherein the RRC protocol layer is configured for the D2D broadcast communication based on the NAS protocol layer being configured.   
     
     
         3 . The method of  claim 2 , wherein the configuring the NAS protocol layer comprises:
 setting at least an Internet Protocol (IP) address for the first UE, a priority for the first UE when the first UE belongs to a D2D communication group, or an IP multicast address when the first UE belongs to the D2D communication group.   
     
     
         4 . The method of  claim 1 , further comprising:
 configuring at least a bearer for the D2D broadcast communication.   
     
     
         5 . The method of  claim 1 , wherein the one or more protocol layers lower than the RRC protocol layer comprises at least one of a packet data convergence protocol (PDCP) layer, an radio link control (RLC) layer, a medium access control (MAC) layer, or a physical layer. 
     
     
         6 . The method of  claim 5 , wherein configuring the one or more protocol layers for the broadcast operation based on configuring the RRC protocol layer for the D2D broadcast communication comprises:
 configuring at least one of the PDCP layer or the RLC layer to operate in a unidirectional mode (U-Mode).   
     
     
         7 . The method of  claim 5 , wherein configuring the one or more protocol layers for the broadcast operation based on configuring the RRC protocol layer for the D2D broadcast communication comprises:
 configuring the MAC layer to generate a MAC subheader, the MAC subheader comprising at least a session identification (ID), a group ID that indicates a D2D communication group to which the first UE belongs, or a source ID that indicates an ID associated with the first UE.   
     
     
         8 . The method of  claim 7 , wherein the MAC subheader further comprises duplicate packet identification information. 
     
     
         9 . The method of  claim 7 , wherein the MAC subheader further comprises at least one of a priority of a session or a time interval for which a lower priority session should not start. 
     
     
         10 . The method of  claim 1 , wherein configuring the one or more protocol layers for the broadcast operation based on configuring the RRC protocol layer for the D2D broadcast communication comprises:
 configuring a medium access control (MAC) layer to generate a MAC control element (CE) comprising at least a group identification (ID) that indicates a D2D communication group to which the first UE belongs, a source ID that indicates an ID associated with the first UE, a priority of a session, or a time interval for which a lower priority session should not start.   
     
     
         11 . The method of  claim 10 , wherein communicating with the at least the second UE based on the one or more protocol layers being configured for the broadcast operation comprises:
 transmitting, to the at least the second UE, a message including the MAC CE indicating that the first UE will send a transmission.   
     
     
         12 . The method of  claim 1 , further comprising:
 monitoring one or more radio resources for an announcement from the at least the second UE, the second UE belonging to a D2D communication group of interest.   
     
     
         13 . An apparatus of wireless communication by a first user equipment (UE), comprising:
 means for determining that an application associated with public safety is initiated;   means for configuring a radio resource control (RRC) protocol layer for device-to-device (D2D) broadcast communication based on initiation of the application associated with public safety;   means for configuring one or more protocol layers for broadcast operation based on configuring the RRC protocol layer for the D2D broadcast communication, the one or more protocol layers being lower than the RRC protocol layer; and   means for communicating with at least a second UE based on the one or more protocol layers being configured for the broadcast operation.   
     
     
         14 . The apparatus of  claim 13 , further comprising:
 means for configuring a non-access stratum (NAS) protocol layer based on the initiation of the application associated with public safety,   wherein the RRC protocol layer is configured for the D2D broadcast communication based on the NAS protocol layer being configured.   
     
     
         15 . The apparatus of  claim 14 , wherein the means for configuring the NAS protocol layer is configured to set at least an Internet Protocol (IP) address for the first UE, a priority for the first UE when the first UE belongs to a D2D communication group, or an IP multicast address when the first UE belongs to the D2D communication group. 
     
     
         16 . The apparatus of  claim 13 , further comprising:
 means for configuring at least a bearer for the D2D broadcast communication.   
     
     
         17 . The apparatus of  claim 13 , wherein the one or more protocol layers lower than the RRC protocol layer comprises at least one of a packet data convergence protocol (PDCP) layer, an radio link control (RLC) layer, a medium access control (MAC) layer, or a physical layer. 
     
     
         18 . The apparatus of  claim 17 , wherein means for configuring the one or more protocol layers for broadcast operation based on configuring the RRC protocol layer for the D2D broadcast communication is configured to configure at least one of the PDCP layer or the RLC layer to operate in a unidirectional mode (U-Mode). 
     
     
         19 . The apparatus of  claim 17 , wherein means for configuring the one or more protocol layers for the broadcast operation based on configuring the RRC protocol layer for the D2D broadcast communication is configured to configure the MAC layer to generate a MAC subheader, the MAC subheader comprising at least a session identification (ID), a group ID that indicates a D2D communication group to which the first UE belongs, or a source ID that indicates an ID associated with the first UE. 
     
     
         20 . The apparatus of  claim 19 , wherein the MAC subheader further comprises duplicate packet identification information. 
     
     
         21 . The apparatus of  claim 19 , wherein the MAC subheader further comprises at least one of a priority of a session or a time interval for which a lower priority session should not start. 
     
     
         22 . The apparatus of  claim 13 , wherein means for configuring the one or more protocol layers for the broadcast operation based on configuring the RRC protocol layer for the D2D broadcast communication is configured to configure a medium access control (MAC) layer to generate a MAC control element (CE) comprising at least a group identification (ID) that indicates a D2D communication group to which the first UE belongs, a source ID that indicates an ID associated with the first UE, a priority of a session, or a time interval for which a lower priority session should not start. 
     
     
         23 . The apparatus of  claim 22 , wherein means for communicating with the at least the second UE based on the one or more protocol layers being configured for the broadcast operation is configured to transmit, to the at least the second UE, a message including the MAC CE indicating that the first UE will send a transmission. 
     
     
         24 . The apparatus of  claim 13 , further comprising:
 means for monitoring one or more radio resources for an announcement from the at least the second UE, the at least the second UE belonging to a D2D communication group of interest.   
     
     
         25 . A apparatus of wireless communication for a first user equipment (UE), comprising:
 a memory; and   at least one processor coupled to the memory and configured to:
 determine that an application associated with public safety is initiated; 
 configure a radio resource control (RRC) protocol layer for device-to-device (D2D) broadcast communication based on initiation of the application associated with public safety; 
 configure one or more protocol layers for broadcast operation based on configuring the RRC protocol layer for the D2D broadcast communication, the one or more protocol layers being lower than the RRC protocol layer; and 
 communicate with at least a second UE based on the one or more protocol layers being configured for the broadcast operation. 
   
     
     
         26 . The apparatus of  claim 25 , wherein the at least one processor is further configured to:
 configure a non-access stratum (NAS) protocol layer based on the initiation of the application associated with public safety,   wherein the RRC protocol layer is configured for the D2D broadcast communication based on the NAS protocol layer being configured.   
     
     
         27 . The apparatus of  claim 26 , wherein the configuration of the NAS protocol layer comprises to set at least an Internet Protocol (IP) address for the first UE, a priority for the first UE when the first UE belongs to a D2D communication group, or an IP multicast address when the first UE belongs to the D2D communication group. 
     
     
         28 . The apparatus of  claim 25 , wherein the at least one processor is further configured to:
 configure at least a bearer for the D2D broadcast communication.   
     
     
         29 . The apparatus of  claim 25 , wherein the one or more protocol layers lower than the RRC protocol layer comprises at least one of a packet data convergence protocol (PDCP) layer, an radio link control (RLC) layer, a medium access control (MAC) layer, or a physical layer. 
     
     
         30 . The apparatus of  claim 29 , wherein the configuration of the one or more protocol layers for the broadcast operation based on the configuration of the RRC protocol layer for the D2D broadcast communication comprises to configure at least one of the PDCP layer or the RLC layer to operate in a unidirectional mode (U-Mode). 
     
     
         31 . The apparatus of  claim 29 , wherein the configuration of the one or more protocol layers for the broadcast operation based on the configuration of the RRC protocol layer for the D2D broadcast communication comprises to:
 configure the MAC layer to generate a MAC subheader, the MAC subheader comprising at least a session identification (ID), a group ID that indicates a D2D communication group to which the first UE belongs, or a source ID that indicates an ID associated with the first UE.   
     
     
         32 . The apparatus of  claim 31 , wherein the MAC subheader further comprises duplicate packet identification information. 
     
     
         33 . The apparatus of  claim 31 , wherein the MAC subheader further comprises at least one of a priority of a session or a time interval for which a lower priority session should not start. 
     
     
         34 . The apparatus of  claim 25 , wherein the configuration of the one or more protocol layers for the broadcast operation based on the configuration of the RRC protocol layer for the D2D broadcast communication comprises to:
 configure a medium access control (MAC) layer to generate a MAC control element (CE) comprising at least a group identification (ID) that indicates a D2D communication group to which the first UE belongs, a source ID that indicates an ID associated with the first UE, a priority of a session, or a time interval for which a lower priority session should not start.   
     
     
         35 . The apparatus of  claim 34 , wherein the communication with the at least the second UE based on the one or more protocol layers being configured for the broadcast operation comprises to:
 transmit, to the at least the second UE, a message including the MAC CE indicating that the first UE will send a transmission.   
     
     
         36 . The apparatus of  claim 25 , wherein the at least one processor is further configured to:
 monitor one or more radio resources for an announcement from the at least the second UE, the at least the second UE belonging to a D2D communication group of interest.   
     
     
         37 . A computer-readable medium storing computer-executable code for wireless communication by a first user equipment (UE), the code when executed by a processor cause the processor to:
 determine that an application associated with public safety is initiated;   configure a radio resource control (RRC) protocol layer for device-to-device (D2D) broadcast communication based on initiation of the application associated with public safety;   configure one or more protocol layers for broadcast operation based on configuring the RRC protocol layer for the D2D broadcast communication, the one or more protocol layers being lower than the RRC protocol layer; and   communicate with at least a second UE based on the one or more protocol layers being configured for the broadcast operation.