Method for performing initial access in wireless communication system, and apparatus therefor
地域：
Seoul
摘要
Disclosed are a method for performing an initial access in a wireless communication system, and an apparatus therefor. Specifically, a method by which a terminal performs an initial access comprises the steps of: receiving, from a base station, configuration information representing one or more physical random access channel (PRACH) configurations; receiving, from the base station, downlink control information including information indicating a specific PRACH configuration among the one or more PRACH configurations, through a physical downlink control channel; and transmitting a preamble and/or data, which are related to the initial access, to the base station through a PRACH on the basis of the specific PRACH configuration.
說明書
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
This application is a National Stage application under 35 U.S.C. § 371 of International Application No. PCT/KR2017/012379, filed on Nov. 3, 2017, which claims the benefit of U.S. Provisional Application No. 62/417,306, filed on Nov. 3, 2016. The disclosures of the prior applications are incorporated by reference in their entirety.
The present invention relates to a wireless communication system and, more particularly, to a method for performing initial access and an apparatus supporting the same.
Mobile communication systems have been developed to provide voice services while ensuring the activity of a user. However, the mobile communication systems have been expanded to their regions up to data services as well as voice. Today, the shortage of resources is caused due to an explosive increase of traffic, and more advanced mobile communication systems are required due to user's need for higher speed services.
Requirements for a next-generation mobile communication system basically include the acceptance of explosive data traffic, a significant increase of a transfer rate per user, the acceptance of the number of significantly increased connection devices, very low end-to-end latency, and high energy efficiency. To this end, research is carried out on various technologies, such as dual connectivity, massive Multiple Input Multiple Output (MIMO), in-band full duplex, Non-Orthogonal Multiple Access (NOMA), the support of a super wideband, and device networking.
權利要求
The invention claimed is:1. A method of performing initial access by a user equipment in a wireless communication system, the method comprising:receiving, from a base station, configuration information representing one or more physical random access channel (PRACH) configurations, receiving, from the base station, downlink control information comprising information representing a specific PRACH configuration among the one or more PRACH configurations, through a physical downlink control channel, and transmitting, to the base station, at least one of data or a preamble related to the initial access through a PRACH, based on the specific PRACH configuration, wherein the one or more PRACH configurations are configured based on pre-configured types, wherein each of the pre-configured types represents a structure related to the PRACH, and wherein the pre-configured types are configured based on (i) whether the structure includes (A) a preamble region only or (B) the preamble region and data region, and (ii) a position of the preamble region associated with the data region. 2. The method of claim 1 , further comprising:receiving, from the base station, configuration information representing one or more data sets, wherein the downlink control information includes indication information for a data set to be transmitted by the user equipment, and wherein the data corresponds to a data set identified using the indication information among the one or more data sets. 3. The method of claim 2 ,wherein the data comprises at least one of a contention resolution identifier, a buffer status report, or a radio resource control (RRC) connection request. 4. The method of claim 1 ,wherein, based on a numerology configuration applied to the preamble and a numerology configuration applied to the data not being identical, the data is transmitted along with at least one demodulation reference signal (DMRS). 5. The method of claim 1 ,wherein the downlink control information further comprises information representing a length of the preamble, and wherein the length of the preamble is configured based on a number of symbols allocated to a transmission region of the data. 6. The method of claim 5 ,wherein the number of symbols allocated to the transmission region of the data is determined based on a data set corresponding to the data among pre-configured one or more data sets. 7. The method of claim 5 ,wherein the length of the preamble and the transmission region of the data are configured based on a time resource region pre-configured for the specific PRACH configuration. 8. The method of claim 1 ,wherein the downlink control information further comprises information representing whether to perform a beam management procedure related to the initial access. 9. The method of claim 1 ,wherein the downlink control information further comprises information representing a PRACH resource, corresponding to the specific PRACH configuration, among one or more PRACH resources pre-configured for the one or more PRACH configurations. 10. The method of claim 1 ,wherein one of the one or more PRACH configurations is configured as a default PRACH configuration. 11. The method of claim 1 ,wherein at least one of the preamble or the data is transmitted when the user equipment is a radio access network (RAN) controlled state. 12. A user equipment configured to perform initial access in a wireless communication system, comprising:a radio frequency (RF) unit configured to transmit and receive radio signals, and a processor functionally connected to the RF unit, wherein the processor is configured to: receive, from a base station, configuration information representing one or more physical random access channel (PRACH) configurations, receive, from the base station, downlink control information comprising information representing a specific PRACH configuration among the one or more PRACH configurations, through a physical downlink control channel, and transmit, to the base station, at least one of data or a preamble related to the initial access through a PRACH, based on the specific PRACH configuration, wherein the one or more PRACH configurations are configured based on pre-configured types, wherein each of the pre-configured types represents a structure related to the PRACH, and wherein the pre-configured types are configured based on (i) whether the structure includes (A) a preamble region only or (B) the preamble region and data region, and (ii) a position of the preamble region associated with the data region. 13. The user equipment of claim 12 , wherein the processor is further configured to:receive, from the base station, configuration information representing one or more data sets, wherein the downlink control information includes indication information for a data set to be transmitted by the user equipment, and wherein the data corresponds to a data set identified using the indication information among the one or more data sets. 14. The user equipment of claim 13 ,wherein the data comprises at least one of a contention resolution identifier, a buffer status report, or a radio resource control (RRC) connection request. 15. The user equipment of claim 12 ,wherein, based on a numerology configuration applied to the preamble and a numerology configuration applied to the data not being identical, the data is transmitted along with at least one demodulation reference signal (DMRS). 16. The user equipment of claim 12 ,wherein the downlink control information further comprises information representing a length of the preamble, and wherein the length of the preamble is configured based on a number of symbols allocated to a transmission region of the data. 17. The user equipment of claim 16 ,wherein the number of symbols allocated to the transmission region of the data is determined based on a data set corresponding to the data among pre-configured one or more data sets. 18. The user equipment of claim 16 ,wherein the length of the preamble and the transmission region of the data are configured based on a time resource region pre-configured for the specific PRACH configuration. 19. The user equipment of claim 12 ,wherein the downlink control information further comprises information representing whether to perform a beam management procedure related to the initial access. 20. The user equipment of claim 12 ,wherein the downlink control information further comprises information representing a PRACH resource, corresponding to the specific PRACH configuration, among one or more PRACH resources pre-configured for the one or more PRACH configurations.
意見反饋