1. A method for wireless communication at a user equipment (UE), comprising:', 'receiving a first signal, the first signal including an indication of whether system information is to be requested by the UE; and', 'obtaining system information in accordance with the indication.

2. The method of claim 1, wherein obtaining system information comprises:', 'sending a request for system information in accordance with the indication; and', 'receiving system information in response to the request.

3. The method of claim 1, wherein obtaining system information comprises:', 'receiving system information via a second signal in accordance with the indication, the second signal being transmitted via a broadcast or broad-beam operation.

4. The method of claim 1, wherein receiving the first signal comprises: receiving information indicating where a request for system information is to be sent by the UE.

5. The method of claim 1, wherein receiving the first signal comprises: receiving information indicating a predetermined channel on which system information is to be transmitted via a second broadcast signal via a broadcast or broad-beam operation.

6. The method of claim 1, wherein the first signal is a synchronization signal.

7. The method of claim 1, wherein receiving the first signal comprises: receiving the first signal as part of a broad-beam operation in a massive multiple-input/multiple-output (MIMO) network.

8. The method of claim 7, wherein obtaining system information comprises:', 'receiving system information as part of a broad-beam or narrow-beam operation.

9. The method of claim 1, wherein receiving the first signal comprises: receiving the first signal as part of a broadcast operation in a non-massive multiple-input/multiple-output (MIMO) network

10. The method of claim 9, wherein obtaining system information comprises:', 'receiving system information as part of a broadcast or unicast operation

11. The method of claim 1, further comprising:', 'identifying one or more services for which system information is to be obtained;', 'wherein obtaining the system information comprises obtaining system information for the identified one or more services in accordance with the indication

12. The method of claim 11, wherein obtaining system information comprises:', 'sending a request for system information for the one or more services; and receiving the system information for the one or more services in response to the request

13. The method of claim 11, wherein obtaining system information comprises:', 'sending a separate request for system information for each of the one or more services, each request being for system information of a different service; and', 'receiving, individually, system information for the one or more services in response to each request

14. The method of claim 11, wherein the indication comprises a first indication, and receiving the first signal comprises:

receiving a second indication that system information for the one or more services is to be broadcast at one or more predetermined times and on one or more predetermined channels

15. The method of claim 11, wherein the indication comprises a first indication, and receiving the first signal further comprises:', 'receiving a second indication that system information for the one or more services is available

16. The method of claim 15, wherein obtaining system information comprises:', 'sending one or more requests for system information for the one or more services in accordance with the first indication and the second indication; and', 'receiving system information for the one or more services in response to the one or more requests

17. The method of claim 15, wherein receiving the first signal comprises: receiving information identifying a target device where one or more requests for system information for the one or more services are to be sent

18. The method of claim 15, wherein receiving the first signal comprises: receiving information identifying one or more time periods corresponding to when one or more requests for system information for the one or more services are to be sent, wherein each time period corresponds to a separate service of the one or more services

19. The method of claim 15, wherein obtaining system information comprises:', 'receiving system information for the one or more services via one or more second signals, the one or more second signals being transmitted via a broadcast or broad- beam operation.

20. The method of claim 11, wherein obtaining system information comprises:

receiving system information for the one or more services, wherein the system information includes information identifying the one or more services for which the system information is valid.

21. The method of claim 11, wherein obtaining system information comprises:', 'receiving system information for one of the one or more services; determining whether additional system information for the one of the one or more services is needed; and', 'requesting additional system information for the one of the one or more services based at least in part on the determining.

22. The method of claim 11, wherein the one or more services include one or more of an energy efficient service, a high reliability service, a low latency service, a broadcast service, or a small data service.

23. The method of claim 11, wherein obtaining system information comprises:', 'receiving system information for the one or more services, wherein the system information includes information identifying a validity time period; and', 're-obtaining system information for the one or more services upon expiration of the validity time period.

24. The method of claim 23, wherein the validity time period is based on a power saving mode (PSM) time period or an amount of time to cycle through all value tags of the system information.

25. A method for wireless communication, comprising:', 'transmitting a first signal, the first signal including an indication of whether system information is to be requested by a user equipment (UE); and', 'transmitting system information in accordance with the indication.

26. The method of claim 25, further comprising:', 'receiving a request for system information in accordance with the indication; and

transmitting system information in response to the request.

27. The method of claim 25, wherein transmitting system information comprises:', 'transmitting system information via a second signal in accordance with the indication, the second signal being transmitted via a broadcast or broad-beam operation.

28. The method of claim 25, further comprising:', 'including, in the first signal, information indicating where a request for system information is to be sent.

29. The method of claim 25, further comprising:', 'including, in the first signal, information indicating a predetermined channel on which system information is to be transmitted via a broadcast or broad-beam operation.

30. The method of claim 25, wherein transmitting system information comprises:', 'transmitting system information in accordance with the indication and a transmission mode.

31. The method of claim 30, further comprising:', 'changing the transmission mode to be a broadcast or broad-beam mode targeting a cell edge and having fixed periodic scheduling.

32. The method of claim 30, further comprising:', 'changing the transmission mode to be a broadcast or broad-beam mode targeting a cell edge and having an on-demand periodic scheduling triggered by a request for system information in accordance with the indication.

33. The method of claim 30, further comprising:', 'changing the transmission mode to be a broadcast or broad-beam mode having an on-demand aperiodic scheduling triggered by a request for system information in accordance with the indication.

34. The method of claim 30, further comprising:

changing the transmission mode to be a unicast or narrow-beam mode having an on-demand aperiodic scheduling triggered by a request for system information in accordance with the indication.

35. The method of claim 30, further comprising:', 'changing the transmission mode based on network load or congestion status.

36. The method of claim 25, wherein the first signal is a synchronization signal.

37. The method of claim 25, further comprising:', 'using a broad-beam operation to transmit the first signal in a massive multiple- input/multiple-output (MIMO) network.

38. The method of claim 37, further comprising:', 'using a broad-beam or narrow-beam operation to transmit system information, in accordance with the indication and a transmission mode.

39. The method of claim 25, further comprising:', 'using a broadcast operation to transmit the first signal in a non-massive multiple-input/multiple-output (MIMO) network.

40. The method of claim 39, further comprising:', 'using a broadcast or unicast operation to transmit system information, in accordance with the indication and a transmission mode.

41. The method of claim 25, wherein transmitting system information comprises:', 'transmitting, in accordance with the indication, system information associated with services available to the UE, wherein separate transmissions are used to transmit the system information for different services and different configurations of services.

42. The method of claim 41, further comprising:', 'receiving a request for system information for one or more services in accordance with the indication; and

transmitting system information for the one or more services in response to the request.

43. The method of claim 41, further comprising:', 'receiving multiple requests for system information for one or more services in accordance with the indication, each request being from the UE and being for system information of a different service; and', 'transmitting system information for the one or more services in response to the request.

44. The method of claim 43, wherein transmitting system information in response to the request comprises:', 'transmitting system information for each of the one or more services in a joint transmission.

45. The method of claim 43, wherein transmitting system information in response to the request comprises:', 'transmitting system information for each of the one or more services in separate transmissions.

46. The method of claim 41, wherein the indication comprises a first indication, the method further comprising:', 'including, in the first signal, a second indication that system information for one or more services is to be broadcast at one or more predetermined times and on one or more predetermined channels.

47. The method of claim 41, wherein the indication comprises a first indication, the method further comprising:', 'including, in the first signal, a second indication that system information for one or more services is available to be requested.

48. The method of claim 47, further comprising:', 'receiving one or more requests for system information for one or more services in accordance with the first indication and the second indication.

49. The method of claim 47, further comprising:', 'including, with the first signal, information indicating where and when one or more requests for system information for one or more services are to be sent.

50. The method of claim 25, further comprising:', 'including, in the system information, information indicating one or more services for which the system information is valid.

51. The method of claim 25, further comprising:', 'including, in the system information, information indicating a duration of time for which the system information is valid, wherein the system information for different services and different configurations of services includes different durations of time.

52. The method of claim 25, further comprising:', 'receiving one or more requests for system information for one or more services in accordance with the indication without having included in the first signal a second indication of which services system information is available.

53. The method of claim 25, further comprising:', 'receiving one or more requests for system information in accordance with the indication; and', 'identifying the system information to be sent pertaining to different services based at least in part on transmission resources used by the one or more requests.

54. The method of claim 25, further comprising:', 'changing the indication to indicate that system information is to be transmitted via either a broadcast or broad-beam operation or via a unicast or narrow-beam operation.

55. An apparatus for wireless communication, comprising: means for receiving a first signal, the first signal including an indication of whether system information is to be requested by a user equipment (UE); and', 'means for obtaining system information in accordance with the indication.

56. The apparatus of claim 55, wherein the means for obtaining system information comprises:

means for sending a request for system information in accordance with the indication; and', 'means for receiving system information in response to the request.

57. The apparatus of claim 55, wherein the means for obtaining system information comprises:', 'means for receiving system information via a second signal in accordance with the indication, the second signal being transmitted via a broadcast or broad-beam operation.

58. The apparatus of claim 55, wherein the means for receiving the first signal comprises:', 'means for receiving information indicating where a request for system information is to be sent by the UE.

59. The apparatus of claim 55, wherein the means for receiving the first signal comprises:', 'means for receiving information indicating a predetermined channel on which system information is to be transmitted via a second broadcast signal via a broadcast or broad-beam operation.

60. The apparatus of claim 55, wherein the first signal is a synchronization signal.

61. The apparatus of claim 55, wherein the means for receiving the first signal comprises:', 'means for receiving the first signal as part of a broad-beam operation in a massive multiple-input/multiple-output (MIMO) network.

62. The apparatus of claim 61, wherein the means for obtaining system information comprises:', 'means for receiving system information as part of a broad-beam or narrow- beam operation.

63. The apparatus of claim 55, wherein the means for receiving the first signal comprises:

means for receiving the first signal as part of a broadcast operation in a non- massive multiple-input/multiple-output (MIMO) network.

64. The apparatus of claim 63, wherein the means for obtaining system information comprises:', 'means for receiving system information as part of a broadcast or unicast operation.

65. The apparatus of claim 55, further comprising:', 'means for identifying one or more services for which system information is to be obtained;', 'wherein the means for obtaining the system information comprises means for obtaining system information for the identified one or more services in accordance with the indication.

66. The apparatus of claim 65, wherein the means for obtaining system information comprises:', 'means for sending a request for system information for the one or more services; and', 'means for receiving the system information for the one or more services in response to the request.

67. The apparatus of claim 65, wherein the means for obtaining system information comprises:', 'means for sending a separate request for system information for each of the one or more services, each request being for system information of a different service; and means for receiving, individually, system information for the one or more services in response to each request.

68. The apparatus of claim 65, wherein the indication comprises a first indication, and the means for receiving the first signal comprises:', 'means for receiving a second indication that system information for the one or more services is to be broadcast at one or more predetermined times and on one or more predetermined channels.

69. The apparatus of claim 65, wherein the indication comprises a first indication, and the means for receiving the first signal further comprises:', 'means for receiving a second indication that system information for the one or more services is available.

70. The apparatus of claim 69, wherein the means for obtaining system information comprises:', 'means for sending one or more requests for system information for the one or more services in accordance with the first indication and the second indication; and', 'means for receiving system information for the one or more services in response to the one or more requests.

71. The apparatus of claim 69, wherein the means for receiving the first signal comprises:', 'means for receiving information identifying a target device where one or more requests for system information for the one or more services are to be sent.

72. The apparatus of claim 69, wherein the means for receiving the first signal comprises:', 'means for receiving information identifying one or more time periods corresponding to when one or more requests for system information for the one or more services are to be sent, wherein each time period corresponds to a separate service of the one or more services.

73. The apparatus of claim 69, wherein the means for obtaining system information comprises:', 'means for receiving system information for the one or more services via one or more second signals, the one or more second signals being transmitted via a broadcast or broad-beam operation.

74. The apparatus of claim 65, wherein the means for obtaining system information comprises:

means for receiving system information for the one or more services, wherein the system information includes information identifying the one or more services for which the system information is valid.

75. The apparatus of claim 65, wherein the means for obtaining system information comprises:', 'means for receiving system information for one of the one or more services; means for determining whether additional system information for the one of the one or more services is needed; and', 'means for requesting additional system information for the one of the one or more services based at least in part on the determining.

76. The apparatus of claim 65, wherein the one or more services include one or more of an energy efficient service, a high reliability service, a low latency service, a broadcast service, or a small data service.

77. The apparatus of claim 65, wherein the means for obtaining system information comprises:', 'means for receiving system information for the one or more services, wherein the system information includes information identifying a validity time period; and', 'means for re-obtaining system information for the one or more services upon expiration of the validity time period.

78. The apparatus of claim 77, wherein the validity time period is based on a power saving mode (PSM) time period or an amount of time to cycle through all value tags of the system information.

79. An apparatus for wireless communication, comprising: means for transmitting a first signal, the first signal including an indication of whether system information is to be requested by a user equipment (UE); and', 'means for transmitting system information in accordance with the indication.

80. The apparatus of claim 79, further comprising:', 'means for receiving a request for system information in accordance with the indication; and

means for transmitting system information in response to the request.

81. The apparatus of claim 79, wherein the means for transmitting system information comprises:', 'means for transmitting system information via a second signal in accordance with the indication, the second signal being transmitted via a broadcast or broad-beam operation.

82. The apparatus of claim 79, further comprising:', 'means for including, in the first signal, information indicating where a request for system information is to be sent.

83. The apparatus of claim 79, further comprising:', 'means for including, in the first signal, information indicating a predetermined channel on which system information is to be transmitted via a broadcast or broad-beam operation.

84. The apparatus of claim 79, wherein the means for transmitting system information comprises:', 'means for transmitting system information in accordance with the indication and a transmission mode.

85. The apparatus of claim 84, further comprising:', 'means for changing the transmission mode to be a broadcast or broad-beam mode targeting a cell edge and having fixed periodic scheduling.

86. The apparatus of claim 84, further comprising:', 'means for changing the transmission mode to be a broadcast or broad-beam mode targeting a cell edge and having an on-demand periodic scheduling triggered by a request for system information in accordance with the indication.

87. The apparatus of claim 84, further comprising:', 'means for changing the transmission mode to be a broadcast or broad-beam mode having an on-demand aperiodic scheduling triggered by a request for system information in accordance with the indication.

88. The apparatus of claim 84, further comprising:', 'means for changing the transmission mode to be a unicast or narrow-beam mode having an on-demand aperiodic scheduling triggered by a request for system', 'information in accordance with the indication.

89. The apparatus of claim 84, further comprising:', 'means for changing the transmission mode based on network load or congestion status.

90. The apparatus of claim 79, wherein the first signal is a synchronization signal.

91. The apparatus of claim 79, further comprising:', 'using a broad-beam operation to transmit the first signal in a massive multiple- input/multiple-output (MIMO) network.

92. The apparatus of claim 91, further comprising:', 'means for using a broad-beam or narrow-beam operation to transmit system information, in accordance with the indication and a transmission mode.

93. The apparatus of claim 79, further comprising:', 'means for using a broadcast operation to transmit the first signal in a non- massive multiple-input/multiple-output (MIMO) network.

94. The apparatus of claim 93, further comprising:', 'means for using a broadcast or unicast operation to transmit system information, in accordance with the indication and a transmission mode.

95. The apparatus of claim 79, wherein the means for transmitting system information comprises:', 'means for transmitting, in accordance with the indication, system information associated with services available to the UE, wherein separate transmissions are used to transmit the system information for different services and different configurations of services.

96. The apparatus of claim 95, further comprising:

means for receiving a request for system information for one or more services in accordance with the indication; and', 'means for transmitting system information for the one or more services in response to the request.

97. The apparatus of claim 95, further comprising:', 'means for receiving multiple requests for system information for one or more services in accordance with the indication, each request being from the UE and being for system information of a different service; and', 'means for transmitting system information for the one or more services in response to the request.

98. The apparatus of claim 97, wherein the means for transmitting system information in response to the request comprises:', 'means for transmitting system information for each of the one or more services in a joint transmission.

99. The apparatus of claim 97, wherein the means for transmitting system information in response to the request comprises:', 'means for transmitting system information for each of the one or more services in separate transmissions.100. The apparatus of claim 95, wherein the indication comprises a first indication, the apparatus further comprising:', 'means for including, in the first signal, a second indication that system information for one or more services is to be broadcast at one or more predetermined times and on one or more predetermined channels.101. The apparatus of claim 95, wherein the indication comprises a first indication, the apparatus further comprising:', 'means for including, in the first signal, a second indication that system information for one or more services is available to be requested.102. The apparatus of claim 101, further comprising:

means for receiving one or more requests for system information for one or more services in accordance with the first indication and the second indication.103. The apparatus of claim 101, further comprising:', 'means for including, with the first signal, information indicating where and when one or more requests for system information for one or more services are to be sent.104. The apparatus of claim 79, further comprising:', 'means for including, in the system information, information indicating one or more services for which the system information is valid.105. The apparatus of claim 79, further comprising:', 'means for including, in the system information, information indicating a duration of time for which the system information is valid, wherein the system information for different services and different configurations of services includes different durations of time.106. The apparatus of claim 79, further comprising:', 'means for receiving one or more requests for system information for one or more services in accordance with the indication without having included in the first signal a second indication of which services system information is available.107. The apparatus of claim 79 further comprising:', 'means for receiving one or more requests for system information in accordance with the indication; and', 'means for identifying the system information to be sent pertaining to different services based at least in part on transmission resources used by the one or more requests.108. The apparatus of claim 79, further comprising:', 'means for changing the indication to indicate that system information is to be transmitted via either a broadcast or broad-beam operation or via a unicast or narrow-beam operation.109. An apparatus for wireless communication, comprising: a processor;

memory in electronic communication with the processor; and instructions stored in the memory, the instructions being executable by the processor to:', 'receive a first signal, the first signal including an indication of whether system information is to be requested by the UE; and', 'obtain system information in accordance with the indication.110. An apparatus for wireless communication, comprising: a processor;', 'memory in electronic communication with the processor; and instructions stored in the memory, the instructions being executable by the processor to:', 'transmit a first signal, the first signal including an indication of whether system information is to be requested by a user equipment (UE); and', 'transmit system information in accordance with the indication.111. A non-transitory computer-readable medium storing computer- executable code for wireless communication, the code executable by a processor to:', 'receive a first signal, the first signal including an indication of whether system information is to be requested by the UE; and', 'obtain system information in accordance with the indication.112. A non-transitory computer-readable medium storing computer- executable code for wireless communication, the code executable by a processor to:', 'transmit a first signal, the first signal including an indication of whether system information is to be requested by a user equipment (UE); and', 'transmit system information in accordance with the indication.']