Terminal and radio communication method for receiving paging channel, and base station for transmitting paging channel

Patent metadata

Field	Value
Publication number	US-11265831-B2
Application number	US-201716322608-A
Country	US
Kind code	B2
Filing date	Aug 3, 2017
Priority date	Aug 4, 2016
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

The present invention is designed so that beamforming can be executed properly even when user terminals are in idle mode. A user terminal communicates with a radio base station that uses beamforming, and has a receiving section that receives a synchronization signal and/or a broadcast channel and a paging channel, which are transmitted using a single beam pattern or a plurality of beam patterns; and a control section that exerts control so that at least part of the paging channel is received based on a resource where the synchronization signal and/or the broadcast channel are allocated.

First claim

The invention claimed is:

1. A terminal comprising:
a receiver that receives a signal including at least one of a synchronization signal and a broadcast channel; and
a processor that controls reception of a physical downlink control channel (PDCCH), to which downlink control information (DCI) scrambled by a paging identifier (P-RNTI) is mapped,
wherein the DCI is located in a same symbol as the signal,
wherein the processor specifies a frequency resource for the DCI that is offset in a frequency direction with respect to a frequency resource of the signal,
wherein the processor controls reception of the DCI based on a timing that is determined based on identification information of the terminal, and
wherein the processor monitors the DCI in the timing of the terminal, per each cycle of discontinuous reception in an idle state.

2. The terminal according to claim 1 , wherein the processor determines the frequency resource for the DCI based on a frequency position of a resource where the signal is received.

3. The terminal according to claim 1 , wherein the processor controls reception of a downlink shared channel for paging located in a different symbol from a symbol where the DCI is received.

4. The terminal according to claim 1 , wherein
a symbol for receiving the DCI is within a time period consisting of a given number of symbols, and
the processor controls reception of a downlink shared channel in the symbol within the time period.

5. The terminal according to claim 1 , wherein the processor controls reception of a message located in the same symbol of the signal.

6. The terminal according to claim 5 , wherein the receiver receives, as the message, at least one of system information modification indication, an Earthquake and Tsunami Warning System (ETWS), and a Commercial Mobile Alert Service (CMAS).

7. A radio communication method for a terminal comprising:
receiving a signal including at least one of a synchronization signal and a broadcast channel; and
controlling reception of a physical downlink control channel (PDCCH), to which downlink control information (DCI) scrambled by a paging identifier (P-RNTI) is mapped,
wherein the DCI is located in a same symbol as the signal,
wherein the terminal specifies a frequency resource for the DCI that is offset in a frequency direction with respect to a frequency resource of the signal,
wherein the terminal controls reception of the DCI based on a timing that is determined based on identification information of the terminal, and
wherein the terminal monitors the DCI in the timing of the terminal, per each cycle of discontinuous reception in an idle state.

8. A base station comprising:
a transmitter that transmits, to a terminal, a signal including at least one of a synchronization signal and a broadcast channel; and
a processor that controls transmission of a physical downlink control channel (PDCCH), to which downlink control information (DCI) scrambled by a paging identifier (P-RNTI) is mapped,
wherein the DCI is located in a same symbol as the signal,
wherein the terminal specifies a frequency resource for the DCI that is offset in a frequency direction with respect to a frequency of the signal,
wherein the terminal controls reception of the DCI based on a timing that is determined based on identification information of the terminal, and
wherein the terminal monitors the DCI in the timing of the terminal, per each cycle of discontinuous reception in an idle state.

9. A system comprising:
a base station; and
a terminal, wherein
the base station comprises:
a transmitter that transmits, to the terminal, a signal including at least one of a synchronization signal and a broadcast channel; and
a processor of the base station that controls transmission of a physical downlink control channel (PDCCH), to which downlink control information (DCI) scrambled by a paging identifier (P-RNTI) is mapped,
wherein the DCI is located in a same symbol as the signal; and

the terminal comprises:
a receiver that receives the signal including at least one of the synchronization signal and the broadcast channel; and
a processor of the terminal that controls reception of the PDCCH, to which the DCI scrambled by P-RNTI is mapped,

wherein the DCI is located in a same symbol as the signal,
wherein the processor of the terminal specifies a frequency resource for the DCI that is offset in a frequency direction with respect to a frequency resource of the signal,
wherein the processor of the terminal controls reception of the DCI based on a timing that is determined based on identification information of the terminal, and
wherein the processor of the terminal monitors the DCI in the timing of the terminal, per each cycle of discontinuous reception in an idle state.

Assignees

• Ntt Docomo Inc

Inventors

• Harada Hiroki
• Osawa Ryosuke
• Ohara Tomoya
• Takeda Kazuaki
• Nagata Satoshi
• Kakishima Yuichi

Classifications

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04W88/08

  Access point devices · CPC title

• H04W56/001 Primary

  Synchronization between nodes · CPC title

• H04B7/0617

  for beam forming · CPC title

• H04W68/02

  Arrangements for increasing efficiency of notification or paging channel · CPC title