Abstract
ABSTRACT A method is provided for allocating resources of a control channel in a mobile communication system using Orthogonal Frequency Division Multiplexing (OFDM). The method includes when a time index and a frequency index of available Resource Elements (REs) are defined as l and k respectively dividing the available REs in a two-dimensional structure of (k l); and time-first-allocating each RE to a plurality of RE groups while increasing the time index l for each frequency index k from an initial value up to a predetermined range.
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Declaration Date | Declaration Reference | Declaring Company | Specification Information | |||||||||
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Technologies
Resource configuration
Product
Base Station (eNB/gNB)User Equipment (UE/Terminal)
Use Cases
Wireless communication
Services
Transmitting/receiving data in downlink
Claim
1. A method for allocating resources of a control channel in a mobile communication system using Orthogonal Frequency Division Multiplexing (OFDM), the method comprising: when a time index and a frequency index of available Resource Elements (REs) are defined as 1 and k, respectively, dividing the available REs in a two- dimensional structure of (k, 1); and time-first-allocating each RE to a plurality of RE groups while increasing the time index 1 for each frequency index k from an initial value up to a predetermined range.
2. The method of claim 1, wherein allocating each RE comprises: determining whether an RE being subjected to time-first allocation is a first RE which is allocated to a corresponding RE group; and when the subjected RE is a first RE, increasing an index of the corresponding RE group.
3. The method of claim 2, wherein allocating each RE comprises: when the RE is not a first RE, maintaining an index of the corresponding', 'RE group.
4. The method of claim 1, wherein each of the RE groups include a same number of valid REs for transmission of the control channel except a RE for transmission of a reference signal.
5. The method of claim 1, wherein at least one of the RE groups further includes the RE for transmission of the reference signal used for channel estimation.
6. The method of claim 5, wherein an RE group including an RE for transmission of the reference signal has a greater number of allocated REs than a number of allocated REs in an RE group that transmits only the control channel.
7. The method of claim 1, wherein the control channel includes a Packet Dedicated Control Channel (PDCCH) transmitted on a downlink.
8. The method of claim 1, wherein a resource allocation for the PDCCH is performed after a resource allocation for a Physical Channel Format Indication Channel (PCFICH) and a Physical Hybrid Automatic Repeat request (H-ARQ) Indicator Channel (PHICH).
9. The method of claim 1, wherein the REs are allocated in units of OFDM symbols on a time domain, and are allocated in units of OFDM tones on a frequency domain
10. An apparatus for allocating resources of a control channel by a Node B in a mobile communication system using Orthogonal Frequency Division Multiplexing (OFDM), the apparatus comprising: a mapper for mapping Resource Elements (REs) available for transmission of the control channel; and a controller for, when a time index and a frequency index of the available REs are defined as 1 and k, respectively, dividing the available REs in a two- dimensional structure of (k, 1), and controlling the mapper to time-first-allocate each RE to a plurality of RE groups while increasing the time index 1 for each frequency index k from an initial value up to a predetermined range
11. The apparatus of claim 10, wherein the controller determines whether the RE being subjected to time-first allocation is a first RE which is allocated to a corresponding RE group, and when the RE is a first RE, increases an index of the corresponding RE group
12. The apparatus of claim 11, wherein when the RE is not a first RE, the controller maintains an index of the corresponding RE group
13. The apparatus of claim 10, wherein each of the RE groups include a same number of valid REs for transmission of the control channel except a RE for transmission of a reference signal
14. The apparatus of claim 10, wherein at least one of the RE groups further includes the RE for transmission of the reference signal used for channel estimation
15. The apparatus of claim 14, wherein an RE group including an RE for transmission of the reference signal has a greater number of allocated REs than a number of allocated REs in an RE group that transmits only the control channel
16. The apparatus of claim 10, wherein the control channel includes a Packet Dedicated Control Channel (PDCCH) transmitted on a downlink
17. The apparatus of claim 10, wherein a resource allocation for the PDCCH is performed after a resource allocation for a Physical Channel Format Indication Channel (PCFICH) and a Physical Hybrid Automatic Repeat reQuest (H-ARQ) Indicator Channel (PHICH)
18. The apparatus of claim 10, wherein the REs are allocated in units of OFDM symbols on a time domain, and are allocated in units of OFDM tones on a frequency domain
19. An apparatus for receiving a control channel by a User Equipment (UE) in a mobile communication system using Orthogonal Frequency Division Multiplexing (OFDM), the apparatus comprising: a receiver for receiving the control channel from a wireless channel; a demapper for demapping Resource Elements (REs) from the received control channel; and a controller for, when a time index and a frequency index of available REs are defined as 1 and k, respectively, dividing the available REs in a two- dimensional structure of (k, 1), and controlling the demapper to demap the control channel, which was transmitted according to a mapping rule for time-first- allocating each RE to a plurality of RE groups while increasing the time index 1 for each frequency index k from an initial value up to a predetermined range.
20. The apparatus of claim 19, wherein the mapping rule is adapted to determine whether the RE being subjected to time-first allocation is a first RE which is allocated to a corresponding RE group, and when the RE is a first RE, increase an index of the corresponding RE group.
21. The apparatus of claim 20, wherein the mapping rule is adapted to maintain an index of the corresponding RE group when the RE is not a first RE.']
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