Abstract
In order to provide a transmission device and transmission method with which a response signal for random access preamble transmitted from a preamble transmission device is efficiently transmitted, setting unit in base station sets a first resource candidate group, which enables terminal capable of receiving a latch response transmitted by demodulation reference signal (DMRS) transmission to be selected, and a second resource candidate group, which enables terminal incapable of receiving a latch response transmitted by DMRS transmission but capable of receiving a latch response transmitted by cell-specific reference signal (CRS) transmission to be selected. Control unit selects DMRS transmission as the latch response transmission method when a resource in which latch preamble has been received is included in the first candidate group, but selects CRS transmission as the latch response transmission method when the resource is included in the second resource candidate group.
| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
|---|---|---|---|---|---|---|---|---|---|
| Declaration Date | Declaration Reference | Declaring Company | Specification Information | ||||||
| 4G | 23/09/2019 | ISLD-201912-056 | SUN PATENT TRUST | Yes | Family Member | ||||
| 4G | 14/12/2020 | ISLD-202012-017 | SUN PATENT TRUST | No | Family Member | ||||
Specification Information
Specification Information
Technologies
Family Information
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Resource configuration Random access
Product
User Equipment (UE/Terminal)Base Station (eNB/gNB)
Use Cases
Wireless communication
Services
Network access
Claim
1. A radio communication method comprising:
in response to receiving broadcast information including resource information indicative of a first resource group, transmitting a random access preamble using the first resource group, and receiving a random access response using a Demodulation Reference Signal (DMRS); and in response to receiving broadcast information not including the resource information indicative of the first resource group, transmitting a random access preamble using a second resource group different from the first resource group, and receiving a random access response using a Cell-specific Reference Signal (CRS).
2. The radio communication method according to claim 1, wherein,
in response to receiving the broadcast information in the first resource group, receiving the random access response using the DMRS, and in response to receiving the broadcast information outside of the first resource group, receiving the random access response using the CRS.
3. The radio communication terminal according to claim 1, comprising:
receiving a Physical Downlink Control Channel (PDCCH) including assignment information indicative of a downlink resource in which the random access response is mapped.
4. The radio communication terminal according to claim 1, comprising:
receiving information regarding at least two resource sub-groups into which the first resource group is divided; and selecting one of the at least two resource sub-groups based on a value of path loss between the radio communication terminal and a base station.
5. The radio communication terminal according to claim 1, wherein, time settings for retransmission are different between the first and second resource groups.
6. The radio communication terminal according to claim 5, wherein, the time setting for retransmission for the first resource group is shorter than the time setting for retransmission for the second resource group.
7. The radio communication terminal according to claim 1, wherein, in response to receiving the broadcast information including the resource information indicative of the first resource group, receiving the random access response on a control channel using the DMRS transmitted on the control channel.
8. A radio communication terminal comprising:
reception circuitry, which, in operation, receives broadcast information including resource information, and receives a random access response, transmission circuitry, which, in operation, transmits a random access preamble, and control circuitry, coupled to the reception circuitry and the transmission circuitry and which, in operation, performs: in response to the reception circuitry receiving broadcast information including resource information indicative of a first resource group, controlling the transmission circuitry to transmit a random access preamble using the first resource group, and controlling the reception circuitry to receive a random access response using a Demodulation Reference Signal (DMRS); and in response to the reception circuitry receiving broadcast information not including the resource information indicative of the first resource group, controlling the transmission circuitry to transmit a random access preamble using a second resource group different from the first resource group, and controlling the reception circuitry to receive a random access response using a Cell-specific Reference Signal (CRS).
9. The radio communication terminal according to claim 8, wherein, the control circuitry, in operation, performs:
in response to the reception circuitry receiving the broadcast information in the first resource group, controlling the reception circuitry to receive the random access response using the DMRS, and in response to the reception circuitry receiving the broadcast information outside of the first resource group, controlling the reception circuitry to receive the random access response using the CRS.
10. The radio communication terminal according to claim 8, wherein, the reception circuitry, in operation, receives a Physical Downlink Control Channel (PDCCH) including assignment information indicative of a downlink resource in which the random access response is mapped.
11. The radio communication terminal according to claim 8, wherein,
the reception circuitry, in operation, receives information regarding at least two resource sub-groups into which the first resource group is divided; and the control circuitry, in operation, selects one of the at least two resource sub-groups based on a value of path loss between the radio communication terminal and a base station.
12. The radio communication terminal according to claim 8, wherein, time settings for retransmission are different between the first and second resource groups.
13. The radio communication terminal according to claim 12, wherein, the time setting for retransmission for the first resource group is shorter than the time setting for retransmission for the second resource group.
14. The radio communication terminal according to claim 1, wherein,
the control circuitry, in operation, performs: in response to the reception circuitry receiving the broadcast information including the resource information indicative of the first resource group, controlling the reception circuitry to receive the random access response on a control channel using the DMRS transmitted on the control channel.
Associated Portfolios
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent
Implicitly disclosed patent
Basis patent
Family member