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EP-3914024-B1 - COMMUNICATIONS DEVICE, SECOND COMMUNICATIONS DEVICE, AND COMMUNICATIONS SYSTEM

EP3914024B1EP 3914024 B1EP3914024 B1EP 3914024B1EP-3914024-B1

Inventors

  • OHTA, YOSHIAKI
  • KAWASAKI, YOSHIHIRO
  • ODE, TAKAYOSHI
  • AOKI, NOBUHISA

Dates

Publication Date
20260513
Application Date
20190116

Claims (7)

  1. A communication device (200) configured to perform a random access procedure, the communication device (200) comprising: a transmitter (250, 251) configured to transmit a first signal which is a signal of the random access procedure and a second signal which is not a signal of the random access procedure; and characterised by a controller (210) configured to: incorporate first information to be transmitted by the first signal into the second signal, and the controller configured to control the transmitter (250, 251) to transmit information related to the second signal, the information related to the second signal indicating that the first information is contained in the second signal; and wherein the controller (210) is configured to incorporate second information corresponding to a negative acknowledgement indicating that a transmission counterpart device (100) has failed to receive data into the second signal, and to control the transmitter (250, 251) to transmit the second information.
  2. The communication device (200) according to claim 1, wherein the first signal is random access preamble assignment, the second signal is a physical downlink shared channel, PDSCH, and the first information contains identification number of a random access preamble.
  3. The communication device (200) according to claim 1, further comprising: a receiver (250, 251) configured to receive a third signal [Msg3], which is a response signal of the random access procedure transmitted by the transmission counterpart device (100), as an acknowledgement indicating that the transmission counterpart device (100) has correctly received the second signal, wherein the third signal is a random access preamble.
  4. The communication device (200) according to claim 1, further comprising: a receiver (250, 251) configured to receive a third signal [Msg3], which is a response signal of the random access procedure transmitted by the transmission counterpart device (100), as an acknowledgement indicating that the transmission counterpart device (100) has correctly received the second signal, wherein the third signal is a random access preamble, and the second information contains an identification number of the random access preamble that is different from the identification number of the random access preamble contained in the first information.
  5. The communication device (200) according to claim 1, wherein the second information contains information indicating a random access preamble corresponding to the negative acknowledgement in the second signal.
  6. A second communication device (100) configured to carry out a random access procedure, the second communication device (100) comprising: a signal receiver (150, 151) configured to receive a first signal which is a signal of the random access procedure and a second signal which is not a signal of the random access procedure transmitted by a transmission-side device (200); characterised by a controller (110) configured to: recognize that the second signal contains first information, and the controller configured to receive information related to the second signal which is transmitted when the transmission-side device (100) transmits the second signal containing the first information to be transmitted by the first signal, the information related to the second signal indicating that the first information is contained in the second signal, when correctly receiving the second signal containing the first information, the controller (110) is configured to control the second communication device (100) to transmit a third signal which is a response signal of the random access procedure and, wherein the transmission-side device (200) further incorporates second information corresponding to a negative acknowledgement indicating that the second communication device (100) has failed to receive data into the second signal and transmits the second information, and when having failed to receive the second signal including the first information correctly, the controller (110) is configured to incorporate the second information into the third signal and transmits the second information.
  7. A communication system comprising: the communication device (200) according to any of claims 1 to 5 and the second communication device (100) according to claim 6.

Description

[Field] The present invention relates to a communication device, a second communication device, and a communication system. [Background Art] In a current communication networks, the traffic of mobile terminals (smartphones and feature phones) accounts for a majority of the communication networks. Furthermore, the traffic used by the mobile terminals tends to expand. Meanwhile, with the development of Internet of things (IoT) services (e.g., monitoring systems such as a traffic system, a smart meter, and a device), it has been demanded to cope with services including various requirement. Consequently, in the communication standard for the fifth generation mobile communication (5G or new radio (NR)), it has been demanded that, in addition to the fourth generation mobile communication (4G) (for example, NPLs 1 to 12), standard techniques, techniques, which achieve a higher data rate, a larger capacity, and lower latency. Note that, for the fifth generation communication standards, 3GPP working groups (such as, e.g., TSG-RAN WG1 and TSG-RAN WG2) have been making a progress on technical study and the first version was released in December 2017.(for example, NPLs 13 to 39). In order to support various kinds of services as described, the 5G is assumed to support many use cases categorized, e.g., enhanced mobile broadband (eMBB), massive machine type communications (MTC), and ultra-reliable and low latency communication (URLLC). Techniques relating to 5G are described in the following prior art documents. [Citation List] [Non-Patent Literature] NPL 1: 3GPP TS 36.133 V15.3.0 (2018-06)NPL 2: 3GPP TS 36.211 V15.2.0 (2018-06)NPL 3: 3GPP TS 36.212 V15.2.1 (2018-07)NPL 4: 3GPP TS 36.213 V15.2.0 (2018-06)NPL 5: 3GPP TS 36.300 V15.2.0 (2018-06)NPL 6: 3GPP TS 36.321 V15.2.0 (2018-07)NPL 7: 3GPP TS 36.322 V15.1.0 (2018-07)NPL 8: 3GPP TS 36.323 V15.0.0 (2018-07)NPL 9: 3GPP TS 36.331 V15.2.2 (2018-06)NPL 10: 3GPP TS 36.413 V15.2.0 (2018-06)NPL 11: 3GPP TS 36.423 V15.2.0 (2018-06)NPL 12: 3GPP TS 36.425 V15.0.0 (2018-06)NPL 13: 3GPP TS 37.340 V15.2.0 (2018-06)NPL 14: 3GPP TS 38.201 V15.0.0 (2017-12)NPL 15: 3GPP TS 38.202 V15.2.0 (2018-06)NPL 16: 3GPP TS 38.211 V15.2.0 (2018-06)NPL 17: 3GPP TS 38.212 V15.2.0 (2018-06)NPL 18: 3GPP TS 38.213 V15.2.0 (2018-06)NPL 19: 3GPP TS 38.214 V15.2.0 (2018-06)NPL 20: 3GPP TS 38.215 V15.2.0 (2018-06)NPL 21: 3GPP TS 38.300 V15.2.0 (2018-06)NPL 22: 3GPP TS 38.321 V15.2.0 (2018-06)NPL 23: 3GPP TS 38.322 V15.2.0 (2018-06)NPL 24: 3GPP TS 38.323 V15.2.0 (2018-06)NPL 25: 3GPP TS 38.331 V15.2.1 (2018-06)NPL 26: 3GPP TS 38.401 V15.2.0 (2018-06)NPL 27: 3GPP TS 38.410 V15.0.0 (2018-06)NPL 28: 3GPP TS 38.413 V15.0.0 (2018-06)NPL 29: 3GPP TS 38.420 V15.0.0 (2018-06)NPL 30: 3GPP TS 38.423 V15.0.0 (2018-06)NPL 31: 3GPP TS 38.470 V15.2.0 (2018-06)NPL 32: 3GPP TS 38.473 V15.2.1 (2018-07)NPL 33: 3GPP TR 38.801 V14.0.0 (2017-03)NPL 34: 3GPP TR 38.802 V14.2.0 (2017-09)NPL 35: 3GPP TR 38.803 V14.2.0 (2017-09)NPL 36: 3GPP TR 38.804 V14.0.0 (2017-03)NPL 37: 3GPP TR 38.900 V15.0.0 (2018-06)NPL 38: 3GPP TR 38.912 V15.0.0 (2018-06)NPL 39: 3GPP TR 38.913 V15.0.0 (2018-06) [Patent Literature] WO 2017/195721 A1 and EP 3451759 A1 disclose a user terminal that communicates using a first transmission time interval (TTI) and a second TTI which has a shorter TTI duration than the first TTI, and this user terminal has a receiving section that receives first downlink control information which is transmitted from a radio base station per first TTI, and second downlink control information which is transmitted in the second TTI, and a control section that controls simultaneous reception of first downlink data which is based on the first downlink control information, and second downlink data which is based on the second downlink control information, in a same carrier, based on a given condition. JP 2010098707 A discloses a mobile station device in a mobile communication system, comprising a physical layer for performing information extraction processing of an uplink grant and a MAC layer for acquiring the uplink grant contained in a random access response and notifying the physical layer of the uplink grant, wherein, in a case where all bits of a resource allocation field included in the uplink grant contained in the random access response are 1, the MAC layer does not notify the physical layer of the uplink grant. Another example can be found in non patent document ERICSSON: "General considerations in MT EDT",3GPP DRAFT; R2-1816635. [Summary of Invention] [Technical Problem] In wireless communication system, it is expected to reduce the latency time in data signal communication. For example, a latency time assumed in 5G, which is intended to enable the handling of URLLC services, is expected in some cases. Therefore, for example, even when a data signal is occurred in a situation in which a terminal device and a base station device are out of synchronization, it is expected to reduce a latency time until the data signal is transmitt