[go: up one dir, main page]

WO2019030033A1 - Appareil de communication, procédé, et programme informatique - Google Patents

Appareil de communication, procédé, et programme informatique Download PDF

Info

Publication number
WO2019030033A1
WO2019030033A1 PCT/EP2018/070548 EP2018070548W WO2019030033A1 WO 2019030033 A1 WO2019030033 A1 WO 2019030033A1 EP 2018070548 W EP2018070548 W EP 2018070548W WO 2019030033 A1 WO2019030033 A1 WO 2019030033A1
Authority
WO
WIPO (PCT)
Prior art keywords
uplink
subframe
uplink channel
mode
channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2018/070548
Other languages
English (en)
Inventor
Muneender Chiranji
Srinivasan Selvaganapathy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Technologies Oy
Original Assignee
Nokia Technologies Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Technologies Oy filed Critical Nokia Technologies Oy
Publication of WO2019030033A1 publication Critical patent/WO2019030033A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • a communication system may be a facility that enables communication between two or more nodes or devices, such as fixed or mobile communication devices. Signals can be carried on wired or wireless carriers.
  • Narrowband internet of things is a technology which allows for low data rate communication between objects.
  • the subcarriers and physical time structure used in NB-loT are similar to those used by LTE and, therefore, these two methods of communication can be combined.
  • the combined system can benefit from orthogonality, if LTE and NB-loT are aligned in the frequency domain and time domain, and hence interference between NB-loT and LTE can be kept reasonably low without filtering. In certain circumstances, however, maintaining an alignment in the time domain between LTE and NB-loT communications can be a challenge.
  • the first part of the uplink channel comprises at least 3 symbols.
  • the method comprises transmitting part of a further uplink channel in the first subframe.
  • the further uplink channel is a physical uplink shared channel.
  • the transmissions of the first part of the uplink channel and the second part of the uplink channel are made according to narrow band internet of things.
  • the first part of the uplink channel and the second part of the uplink channel comprise at least part of a physical random access channel preamble.
  • the physical random access channel preamble comprises a cyclic prefix.
  • the first subframe comprises an Uplink Pilot Time Slot comprising the first part of the uplink channel.
  • the first configuration comprises a greater number of symbols reserved for uplink transmission than the second configuration.
  • the data transmitted and received according to the first protocol comprises a second subframe that is configured for switching between a downlink mode and an uplink mode, wherein the difference in time between an end of the downlink received data in the second subframe and the start of the uplink transmission in the first subframe is at least one symbol.
  • a method comprising: receiving a first part of an uplink channel in a first subframe that is configured for switching between a downlink mode and an uplink mode; and receiving a second part of the uplink channel in at least one subframe immediately adjacent to the first subframe.
  • the first part of the uplink channel comprises at least 3 symbols.
  • the method comprises receiving part of a further uplink channel in the first subframe.
  • the first part of the uplink channel and the second part of the uplink channel comprise at least part of a physical random access channel preamble.
  • the physical random access channel preamble comprises a cyclic prefix.
  • the first subframe comprises an Uplink Pilot Time Slot comprising the first part of the uplink channel.
  • the first part of the uplink channel and the second part of the uplink channel are in one of: in band mode of operation or guardband mode of operation.
  • the method comprises: receiving the subframes that are configured for switching between a downlink mode and an uplink mode in a first configuration when each of the subframes comprise a part of an uplink channel; and receiving the subframes that are configured for switching between a downlink mode and an uplink mode in a second configuration when the subframes do not comprise a part of an uplink channel.
  • the first part of the uplink channel and the second part of the uplink channel are according to a second protocol, the method comprising: transmitting and receiving data according to a first protocol, wherein the data received according to the first protocol is aligned in time with the data received according to the second protocol.
  • the data transmitted and received according to the first protocol comprises a second subframe that is configured for switching between a downlink mode and an uplink mode, wherein the difference in time between an end of the downlink transmission in the second subframe and the start of the uplink reception in the first subframe is at least one symbol.
  • a computer program comprising instructions such that when the computer program is executed on a computing device provides a method, the computing device is arranged to perform the steps of any of the first and second aspect.
  • an apparatus comprising: at least one processor and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to: transmit a first part of an uplink channel in a first subframe that is configured for switching between a downlink mode and an uplink mode; and transmit a second part of the uplink channel in at least one subframe immediately adjacent to the first subframe.
  • the first part of the uplink channel comprises at least 3 symbols.
  • the apparatus is configured to: transmit part of a further uplink channel in the first subframe.
  • the further uplink channel is a physical uplink shared channel.
  • the transmissions of the first part of the uplink channel and the second part of the uplink channel are made according to narrow band internet of things.
  • the first part of the uplink channel and the second part of the uplink channel comprise at least part of a physical random access channel preamble.
  • the physical random access channel preamble comprises a cyclic prefix.
  • the first subframe comprises an Uplink Pilot Time Slot comprising the first part of the uplink channel.
  • the transmissions of the first part of the uplink channel and the second part of the uplink channel are made in one of: in band mode of operation or guardband mode of operation.
  • the apparatus is configured to dynamically adjust the configuration of subframes that are configured for switching between a downlink mode and an uplink mode.
  • the first configuration comprises a greater number of symbols reserved for uplink transmission than the second configuration.
  • the transmissions of the first part of the uplink channel and the second part of the uplink channel comprise transmissions according to a second protocol, the apparats being configured to: transmit and receive data according to a first protocol, wherein the data transmitted according to the first protocol is aligned in time with the transmissions according to the second protocol.
  • the first part of the uplink channel comprises at least 3 symbols.
  • the apparatus is configured to receive part of a further uplink channel in the first subframe.
  • the further uplink channel is a physical uplink shared channel.
  • the first part of the uplink channel and the second part of the uplink channel are according to the narrow band internet of things protocol.
  • the first part of the uplink channel and the second part of the uplink channel comprise at least part of a physical random access channel preamble.
  • the physical random access channel preamble comprises a cyclic prefix.
  • the first subframe comprises an Uplink Pilot Time Slot comprising the first part of the uplink channel.
  • the first part of the uplink channel and the second part of the uplink channel are in one of: in band mode of operation or guardband mode of operation.
  • the apparatus is configured to receive dynamically adjusted subframe configurations of subframes that are configured for switching between a downlink mode and an uplink mode. [0062] In one embodiment, the apparatus is configured to: receive the subframes that are configured for switching between a downlink mode and an uplink mode in a first configuration when each of the subframes comprise a part of an uplink channel; and receive the subframes that are configured for switching between a downlink mode and an uplink mode in a second configuration when the subframes do not comprise a part of an uplink channel.
  • the first configuration comprises a greater number of symbols reserved for uplink transmission than the second configuration.
  • the apparatus is configured to: transmit and receive data according to a first protocol, wherein the data received according to the first protocol is aligned in time with the data received according to the second protocol.
  • the data transmitted and received according to the first protocol comprises a second subframe that is configured for switching between a downlink mode and an uplink mode, wherein the difference in time between an end of the downlink transmission in the second subframe and the start of the uplink reception in the first subframe is at least one symbol.
  • an apparatus comprising: means for transmitting a first part of an uplink channel in a first subframe that is configured for switching between a downlink mode and an uplink mode; and means for transmitting a second part of the uplink channel in at least one subframe immediately adjacent to the first subframe.
  • an apparatus comprising: means for:
  • Figure 1 shows a schematic example of a wireless communication system where some examples may be implemented
  • Figure 2 shows an example of a communication device
  • Figure 3 show an example of an LTE carrier and NB-loT carriers
  • Figure 4 shows an example of different UL/DL configurations that may be applied for an LTE frame when using time division duplex (TDD);
  • TDD time division duplex
  • Figure 5 shows an example of a symbol group that is part of P ACH preamble
  • Figure 6 shows examples of different symbol groups that are part of a P ACH preamble
  • Figure 8 shows an example of a symbol group that is part of a PRACH preamble
  • Figure 9 shows an example of subframes that may be used to switch between downlink and uplink transmission mode
  • Figure 10 shows an example of different subframes that may be transmitted by a communication device over a period of time
  • Figure 12 shows an example method that may be performed in a base station
  • Figure 13 shows an example control apparatus
  • Figure 14 shows an example of a non-transitory computer readable medium.
  • a wireless communication system 100 such as that shown in figure 1, mobile communication devices or user equipment (UE) 102, 104, 105 are provided wireless access via at least one base station or similar wireless transmitting and/or receiving node or point.
  • a base station is referred to as an eNodeB (eNB) in LTE.
  • Base stations are typically controlled by at least one appropriate controller apparatus, so as to enable operation thereof and management of mobile communication devices in communication with the base stations.
  • the controller apparatus may be located in a radio access network (e.g. wireless communication system 100) or in a core network (CN) (not shown) and may be implemented as one central apparatus or its functionality may be distributed over several apparatus.
  • CN core network
  • the controller apparatus may be part of the base station and/or provided by a separate entity such as a Radio Network Controller (RNC).
  • RNC Radio Network Controller
  • control apparatus 108 and 109 are shown to control the respective macro level base stations 106 and 107.
  • the control apparatus may additionally or alternatively be provided in a radio network controller.
  • LTE systems may, however, be considered to have a so-called "flat" architecture, without the provision of RNCs; rather the eNB is in communication with a system architecture evolution gateway (SAE-GW) and a mobility management entity (MME), which entities may also be pooled meaning that a plurality of these nodes may serve a plurality (set) of eNBs.
  • SAE-GW system architecture evolution gateway
  • MME mobility management entity
  • Each UE is served by only one MME and/or S-GW (serving gateway) at a time and the (e) NB keeps track of current association.
  • SAE-GW is a "high-level" user plane core network element in LTE, which may consist of the S-GW and the P-GW (packet data network gateway). The functionalities of the S-GW and P-GW are separated and they are not required to be co-located.
  • the smaller base stations 116, 118 and 120 may also be connected to the network 113, for example by a separate gateway function and/or via the controllers of the macro level stations.
  • the base stations 116, 118 and 120 may be pico or femto level base stations or the like. In the example, stations 116 and 118 are connected via a gateway 111 whilst station 120 connects via the controller apparatus 108. In some examples, the smaller stations may not be provided.
  • the devices 102, 104, 105, described above may also be configured to send and receive communications in accordance with Narrowband Internet of Things (NB-loT) in addition to sending and receiving LTE communications.
  • NB-loT Narrowband Internet of Things
  • the devices may be UE devices and may exchange NB-loT communications with base stations 116, 118, and 120 or may exchange NB-loT communications with other UE devices.
  • MTC machine type communication
  • eMTC enhanced machine type communication
  • LoT Internet of Things
  • narrowband loT user devices such as machine type communication (MTC) user devices, enhanced machine type communication (eMTC) user devices, Internet of Things (loT) user devices, and/or narrowband loT user devices.
  • MTC machine type communication
  • eMTC enhanced machine type communication
  • LoT Internet of Things
  • narrowband loT user devices such as narrowband loT user devices.
  • core network 150 may be referred to as Evolved Packet Core (EPC), which may include a mobility management entity (MME) which may handle or assist with mobility/handover of user devices between BSs, one or more gateways that may forward data and control signals between the BSs and packet data networks or the Internet, and other control functions or blocks.
  • EPC Evolved Packet Core
  • MME mobility management entity
  • gateways may forward data and control signals between the BSs and packet data networks or the Internet, and other control functions or blocks.
  • Non-limiting examples of these services comprise two-way or multi-way calls, data communication or multimedia services or simply an access to a data communications network system, such as the Internet. Users may also be provided broadcast or multicast data.
  • Non-limiting examples of the content comprise downloads, television and radio programs, videos, advertisements, various alerts and other information.
  • the UE 200 may receive signals over an air or radio interface 207 via appropriate apparatus for receiving and may transmit signals via appropriate apparatus for transmitting radio signals.
  • transceiver apparatus is designated schematically by block 206.
  • the transceiver apparatus 206 may be provided for example by means of a radio part and associated antenna arrangement.
  • the antenna arrangement may be arranged internally or externally to the mobile device.
  • a UE is typically provided with at least one data processing entity 201, at least one random access memory 202, at least on read only memory 209, and other possible components 203 for use in software and hardware aided execution of tasks it is designed to perform, including control of access to and communications with access systems and other communication devices.
  • the at least one random access memory 202, and the at least one read only memory 209 may be in communication with the data processing entity 201, which may be a data processor.
  • the data processing, storage and other relevant control apparatus can be provided on an appropriate circuit board and/or in chipsets. This feature is denoted by reference 204.
  • the user may control the operation of the mobile device by means of a suitable user interface such as key pad 205, voice commands, touch sensitive screen or pad, combinations thereof or the like.
  • a display 208, a speaker and a microphone can be also provided.
  • a UE may comprise appropriate connectors (either wired or wireless) to other devices and/or for connecting external accessories, for example hands-free equipment, thereto.
  • a UE may not include all of the features discussed above with respect to figure 2, but may be simpler than the example presented.
  • a UE need not include, for example, a display 208 or a speaker. It should be appreciated that in some examples, a device with communications ability may be used.
  • an NB-loT signal 330 may be implemented in the guardband at the side of the LTE signal.
  • the guardband is a part of the spectrum at the edge of an LTE carrier signal that is not formally allocated for use by the LTE system.
  • the guardband exists to prevent interference between the LTE carrier signal and any adjacent signal, e.g. a further LTE carrier signal.
  • a third option for implementing NB-loT is standalone deployment. Unlike inband or guardband operation, standalone deployment utilizes bandwidth that is not reserved by the existing LTE network. As shown in figure 3, a standalone NB-loT signal 340 may be located in an unused part of the spectrum away from the LTE carrier.
  • NB-loT e.g. carrier signals 320, 330, 340
  • UL uplink
  • DL downlink
  • FIG 4 shows a table 400 of different configurations that may be applied for an LTE frame when using time division duplex (TDD).
  • configuration may be understood to refer to the time periods assigned for downlink communication and uplink communication.
  • each configuration may, relative to other configurations, comprise a sequence of uplink subframes, downlink subframes, and subframes that are configured for transitioning between an uplink subframe and a downlink subframe.
  • Time division duplex (TDD) refers to duplex communication links where the uplink transmissions are separated from the downlink transmissions by the allocation of different time slots in the same frequency band.
  • TDD is a transmission scheme that allows asymmetric flow for uplink and downlink data transmission, in which a communication device is allocated respective time slots for uplink and downlink transmission.
  • the first configuration shows that the communication device receives downlink subframes from the base station at subframe numbers 0 and 5, and transmits uplink subframes to the base station at subframe numbers 2, 3, 4, 7, 8, and 9.
  • Subframe number 1 is a special subframe.
  • a special subframe may be understood to be a subframe which is configured for switching between downlink transmissions and uplink transmissions.
  • a special subframe is divided into 3 parts: the Downlink Pilot Time Slot (DwPTS), the Guard Period (GP) and the Uplink Pilot Time Slot (UpPTS).
  • DwPTS Downlink Pilot Time Slot
  • GP Guard Period
  • UpPTS Uplink Pilot Time Slot
  • the maximum period of continuous uplink transmission is 3 subframes. Each subframe is 1ms in length. Therefore, at most, any NB-loT UL transmission must last no longer than 3m, so as to ensure that the LTE and NB-loT configurations remain aligned in the time domain. For certain types of transmission, this may be problem.
  • the receiver can identify the end point of each symbol and correctly correlate the information, thereby eliminating intersymbol interference.
  • Typical values for Tcp and Ts eq for different preamble formats are listed in terms of LTE sampling time Ts ( ⁇ 32.55 ns) in Table 1.
  • the PRACH preamble consists of four of the symbol groups 500 shown in figure 5, transmitted without time gaps between them. Effective FDD PRACH preamble durations for the two formats are given below in table 2.
  • One proposed solution to the problem, in the context of channel preambles, is to replace the usual channel preamble with two reduced size preambles (known as a "mini preambles") each having half the number of symbol groups.
  • the two mini preambles could be transmitted in two consecutive U L reserved transmissions. Reducing the size in this way, would enable each of the resulting mini preambles to fit into some of the time periods (2ms and 3ms) reserved for U L in the TDD configurations shown in figure 4.
  • this proposed solution has the disadvantage of leading to delays.
  • the size is still too great to enable the resulting mini preambles to be transmitted in the 1ms time periods, which in some cases is the only time reserved for UL in a particular LTE U L/DL configuration.
  • Another proposed solution to the problem is to alter the sub-carrier spacing so as to meet the timing requirements.
  • the subcarrier spacing cannot be altered and, therefore, the same concept of frequency hopped symbol group transmission needs to be used, with the same tone frequency of 3.75 KHz.
  • Another proposed solution is to replace the special subframe with an extended special subframe, where the special subframe is extended to 2 subframes (28 symbols) using the existing special subframe (14 symbols) and the existing next U L subframe (14 symbols) and granting more symbols for DL (as required). This allows more symbols for DL in DL restricted configuration.
  • FIG 6 shows different possibilities for symbol group(s) that may be transmitted in a period assigned for U L transmission lasting only 1 ms.
  • a first possible transmission 600 is shown. This transmission 600 comprises only one symbol group 610. The symbol group 610 comprises a cyclic prefix and 3 symbols. Each of the 3 symbols may be transmitted at a different tone frequency. This transmission 600 may be part of a channel preamble, with the remaining parts of the preamble being transmitted at a later point in time in different U L transmission windows.
  • a second possible transmission 650 that may occur in a 1ms window is shown. This transmission 650 comprises a first symbol group 660, and a second symbol group 670.
  • the first symbol group 660 and second symbol group 670 each comprise a cyclic prefix and one symbol.
  • This transmission 650 may be part of a channel preamble, with the remaining parts of the preamble being transmitted at a later point in time in different UL transmission windows.
  • FIG 8 shows a possible transmission 800 for symbol group(s) that may be transmitted in a period assigned for U L transmission lasting 3 ms.
  • This transmission 800 comprises a first symbol group 810, and a second symbol group 820.
  • the first symbol group 810 and second symbol group 820 each comprise a cyclic prefix and five symbols.
  • This transmission 800 may be part of a channel preamble, with the remaining parts of the preamble being transmitted at a later point in time in different U L transmission windows.
  • the two symbol groups may be transmitted using frequency hopping, wherein the first symbol group 810 is transmitted at a first frequency, and the second symbol group 820 is transmitted at a second frequency, that is different to the first frequency.
  • N B-loT there are two different preamble formats that may be used for a PRACH preamble.
  • Format 0 uses a shorter cyclic prefix and, hence has a reduced duration compared to format 1, which uses a long cyclic prefix. If the transmissions 600, 650, 700, 800, that are shown in figure 6, 7, and 8 are sent according to format 1, and without using the method according to examples of the application that will be described, the time required for transmission will exceed the window size limits (either 1 ms, 2ms, or 3ms). This may be seen from table 3, wherein the additional transmission time required for these formats is shown. The additional transmission time required for format 1 is given in ta ble 3.
  • PRACH 1ms - Format 1 (0.266 1.066 ms : 0.066 Additional 2028 Ts.
  • PRACH 3ms - Format 1 (0.266 2.133 ms : 0.2 msec Additional 6144 Ts
  • a new special sub-frame may be used, which includes extra UL symbols for transmitting a first part of an uplink channel.
  • the time duration of a second part of the uplink channel that is transmitted during the UL slots which follow the special subframe may be reduced to a level that allows it to be transmitted within a time period that is permitted for UL by the TDD configuration.
  • the new special subframe may use the same length as a special subframe that is currently used for switching that doesn't include part of a part of an uplink channel.
  • the new special subframe may consist of 14 symbols.
  • the first part of the uplink channel may comprise a first part of a channel preamble.
  • the second part of the uplink channel may comprise a second part of a channel preamble.
  • the first part of the uplink channel and the second part of the uplink channel may comprise a channel preamble.
  • the first part of the uplink channel and the second part of the uplink channel may comprise part of a channel preamble.
  • the channel preamble could be a PRACH preamble. In other cases, the preamble could be a preamble for other UL channels.
  • the first part of the uplink channel that is included in the special subframe may be part of a physical uplink shared channel (PUSCH).
  • the uplink part of the special subframe may comprise part of a first channel and part of a second channel.
  • the first channel could, for example, be a PRACH
  • the second channel could, for example, be a PUSCH.
  • the base station may begin channel processing of the uplink channel from the start of the UL section (e.g. the start of the UpPTS) in the special subframe instead of at the start of the UL slot in UL-DL configuration.
  • This processing may comprise PRACH processing in the case that the first part of the uplink channel comprises a part of a PRACH preamble.
  • an LTE system may determine a configuration to be used for a special subframe in dependence on a determination of what is to be transmitted in a NB-loT communication. This may result in having a special subframe configuration that is dependent on a transmissions to be made in a 2 nd protocol (NB -loT).
  • the use of the modified special subframe in which at least part of the uplink channel is included in the subframe may be dynamically applicable.
  • the modified special subframe may only be transmitted by the communication when followed by UL subframes where the channel is to be sent. After the communication device has transmitted the first and second part of the uplink channel, it may then revert to sending a special subframe without at least part of an uplink channel included in it.
  • the special subframe with the first part of the uplink channel, and the special subframe without may use different configurations. For the different configurations, different subcarrier spacing may be used.
  • the use of the new special subframe may be combined with the use of reduced size preambles, which are transmitted in consecutive UL reserved transmissions.
  • the first part of the uplink channel comprises a first part of a channel preamble
  • the second part of the uplink channel comprises a second part of a channel preamble.
  • At least part of the preamble may be transmitted during the special subframe preceding the UL transmissions, for example, transmission 600, 650, 700, 800.
  • the at least part of the preamble may be transmitted as part of the UpPTS part of the special subframe.
  • the existing special subframe configurations for TDD only provides 1 or 2 OFDM symbols for UpPTS.
  • the special subframe configuration for TDD idle mode operation is given in table 4.
  • an additional period of up to 6144Ts may be required for the transmission of the preamble as part of the UpPTS part of the special subframe.
  • the configurations 0 to 4 may provide a sufficient period of 1 UpPTS.
  • the configurations 5 to 9 may provide a sufficient period of 2 UpPTS.
  • configuration 10 may provide a sufficient period of 6 UpPTS.
  • Table 5 shows a set of possible configurations for a modified special subframe that could be used to accomodate at least part of a PRACH preamble.
  • the configurations shown in table 5, typically have longer UpPTS duration than the special subframe configuration for TDD idle mode operation that are shown in table 4.
  • the number of downlink symbols may be reduced.
  • enough of the channel preamble may be including in the uplink section of the special subframe, that the subsequent uplink transmissions after the special subframe are able to accommodate the remaining part of the channel preamble.
  • the format 1 (having a long cyclic prefix) preamble may be used with all of the configurations shown in table 5, with the exception of configurations 3, 4, and 7.
  • the base station that is configured to communicate with the communication device may be configured to broadcast an instruction to modify the special subframe configuration so as to allow transmission by the communication device of the channel preamble.
  • the need for a modified special frame will vary. For example, if the UL/DL configuration is such that, in each frame, only one UL subframe is assigned, a lms format for transmitting the preamble, e.g. using transmissions 600 or 650, may be used. In this case, no modification to the special subframe configuration is needed, and the configurations 0 to 9 shown in table 4 may be used. In another example, if the channel format 0, having a shortened cyclic prefix, is used, the special subframe adjustment is not required.
  • Dynamic adjustment of the durations of the uplink period and the downlink period may be carried out for the special subframe preceding the U L subframe configured for channel transmission. This may be done to enable transmission of the channel preamble whose length requires additional UL duration than is available in subframes assigned for uplink that follow the special subframe. Performing the dynamic adjustment may be done without impacting the special subframe configuration for transmissions according to other protocols (e.g. LTE) that may take place adjacent the transmission of the special subframe including part of the channel preamble.
  • the dynamic adjustment could comprise switching between different special subframe configurations, for example, the configurations shown in table 4 and table 5.
  • a particular configuration for a special subframe used for the second protocol may be selected without impacting the interworking with the first protocol.
  • the DwPTS and UpPTS duration may be selected so that the DL transmission of the special subframe according to the second protocol does not overlap with the uplink transmission according to the first protocol.
  • the DwPTS and UpPTS duration may be selected so that the U L transmission of the special subframe according to the second protocol does not overlap with the downlink transmission according to the first protocol.
  • FIG 9 illustrates this.
  • the figure shows a first special subframe 900 according to a first protocol (e.g. LTE), and a second special subframe 950 according to the second protocol (e.g. N B-loT).
  • the second special subframe 950 may incorporate at least part of a channel preamble, which may be transmitted, in the U L part 960 (i.e. UpPTS) of the second special subframe 950.
  • the duration of the downlink section 970 i.e.
  • DwPTS DwPTS
  • the duration of the uplink section 960 of the second special su bframe 950 may be chosen in dependence upon the duration of the downlink section 910 of the first special subframe 900 and the uplink section 920 of the first special subframe 900. Specifically, the durations may be selected such that there is at least a 1 symbol gap between the end of the downlink section 910 of the first special subframe 900 and the uplink section 960 of the second special subframe 950.
  • the condition enables the second protocol base station (e.g. N B-loT base station) to switch to uplink reception only after the downlink transmission according to the first protocol stops. Hence, the problem of interference between the transmissions may be avoided.
  • the duration of the downlink transmission 970 of the second special subframe could be selected such that there is at least a one symbol gap between the end of the downlink transmission and the start of the uplink transmission 920 of the first special subframe.
  • FIG 10 shows an example of transmissions from a communication device that may take place over a time period according to an example.
  • the communication device is configured to transmit a first special subframe 1010 comprising an U L part 1020.
  • the U L part 1020 includes a first part of a channel preamble.
  • the communication device is configured to transmit a second part 1030 of the channel preamble.
  • the second part 1030 of the channel preamble may comprise one of the transmissions 600, 650, 700, and 800, shown in figures 6, 7, and 8.
  • the communication device may be configured to receive downlink data 1040 from the base station.
  • the communication device is configured to, after receiving the downlink data 1040 from the base station and prior to switching back to UL mode, transmit another special subframe 1020 to the base station comprising an U L part 1060.
  • the UL part 1060 includes a third part of a channel preamble.
  • the communication device is configured to transmit a fourth part 1070 of the channel preamble.
  • the fourth part 1070 of the channel preamble may comprise one of the transmissions 600, 650, 700, and 800, shown in figures 6, 7, and 9.
  • FIG 11 shows a method that may be performed in a communication device according to examples of the application. It would be appreciated that this method is an example only, and that in some examples one or more steps may be excluded.
  • the communication devices receives part of a special subframe.
  • the received part of the subframe may comprise a DwPTS.
  • the communication device transmits part of a special subframe to the base station.
  • the transmitted part of the special subframe comprises a part of a channel preamble.
  • the transmitted part of special subframe may comprise an UpPTS.
  • the communication device is then configured to transmit another part of the channel preamble to the base station. This part of the channel preamble may be divided into two or more separate parts that are transmitted at separate frequencies according to frequency hopping.
  • the communication device is configured to receive downlink data from the base station.
  • the timing of this special subframe may be aligned with the timing of a special subframe corresponding to a first protocol (e.g. LTE)
  • a first protocol e.g. LTE
  • the base station receives part of a special subframe.
  • the received part of the special subframe comprises a part of a channel preamble.
  • the received part of special su bframe may comprise an UpPTS.
  • the base station may begin to process the channel preamble using the received part of the channel preamble contained in the special subframe.
  • this part of the channel preamble is received at the base station.
  • This part of the channel preamble may be divided into two or more separate parts that are transmitted at separate frequencies according to frequency hopping.
  • the base station is configured to transmit downlink data to the communication device.
  • the method may repeat until the full channel preamble is transmitted by the communication device.
  • Examples of the application have the advantage that by re-adjustment of the special subframe design, which may follow the design of N B-loT FDD, to include part of an uplink channel , improved resource efficiency is achieved. Any other formats will not have the same resource efficiency (CP overhead, Guard Period within subframe).
  • the re-adjustment allows the transmission of the first and the second parts of the uplink channel within the complete uplink window.
  • the method may additionally be implemented in a control apparatus as shown in Figure 13.
  • the method may be implemented in a single processor 201 or control apparatus or across more than one processor or control apparatus.
  • Figure 13 shows an example of a control apparatus 1300 for a communication system, for example to be coupled to and/or for controlling a station of an access system, such as a RAN node, e.g. a base station, (e) node B, a central unit of a cloud architecture or a node of a core network such as an MME or S-GW, a scheduling entity such as a spectrum management entity, or a server or host.
  • the control apparatus may be integrated with or external to a node or module of a core network or RAN.
  • base stations comprise a separate control apparatus unit or module.
  • the control apparatus can be another network element such as a radio network controller or a spectrum controller.
  • each base station may have such a control apparatus as well as a control apparatus being provided in a radio network controller.
  • the control apparatus 1300 can be arranged to provide control on
  • the various examples may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects of the invention may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the invention is not limited thereto. While various aspects of the invention may be illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that these blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • the examples of this invention may be implemented by computer software executable by a data processor of the mobile device, such as in the processor entity, or by hardware, or by a combination of software and hardware.
  • Computer software or program also called program product, including software routines, applets and/or macros, may be stored in any apparatus-readable data storage medium and they comprise program instructions to perform particular tasks.
  • a computer program product may comprise one or more computer-executable components which, when the program is run, are configured to carry out examples.
  • the one or more computer-executable components may be at least one software code or portions of it.
  • any blocks of the logic flow as in the Figures may represent program steps, or interconnected logic circuits, blocks and functions, or a combination of program steps and logic circuits, blocks and functions.
  • the software may be stored on such physical media as memory chips, or memory blocks implemented within the processor, magnetic media such as hard disk or floppy disks, and optical media such as for example DVD and the data variants thereof, CD.
  • the physical media is a non-transitory media.
  • An example of a non-transitory computer readable medium 1400 is shown in figure 14.
  • the non-transitory computer readable medium 1400 may be a CD or DVD.
  • the memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.
  • the data processors may be of any type suitable to the local technical environment, and may comprise one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), application specific integrated circuits (ASIC), FPGA, gate level circuits and processors based on multi core processor architecture, as non- limiting examples.
  • Examples of the inventions may be practiced in various components such as integrated circuit modules.
  • the design of integrated circuits is by and large a highly automated process.
  • Complex and powerful software tools are available for converting a logic level design into a semiconductor circuit design ready to be etched and formed on a semiconductor substrate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de transmission, d'un dispositif de communication à une station de base. Selon le procédé, une partie du préambule dans une sous-trame spéciale est utilisée pour exécuter une transition entre un mode de communication de liaison montante et un mode de communication de liaison descendante, et une autre partie du préambule se trouve dans un intervalle de liaison montante attribué qui est adjacent à la sous-trame spéciale.
PCT/EP2018/070548 2017-08-11 2018-07-30 Appareil de communication, procédé, et programme informatique Ceased WO2019030033A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN201741028735 2017-08-11
IN201741028735 2017-08-11

Publications (1)

Publication Number Publication Date
WO2019030033A1 true WO2019030033A1 (fr) 2019-02-14

Family

ID=63047386

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/070548 Ceased WO2019030033A1 (fr) 2017-08-11 2018-07-30 Appareil de communication, procédé, et programme informatique

Country Status (1)

Country Link
WO (1) WO2019030033A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021042394A1 (fr) * 2019-09-06 2021-03-11 Nokia Shanghai Bell Co., Ltd. Répétition de séquence pour une transmission de liaison montante non synchronisée

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015172830A1 (fr) * 2014-05-15 2015-11-19 Nokia Solutions And Networks Oy Procédé et appareil de transmission/réception de signaux de référence

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015172830A1 (fr) * 2014-05-15 2015-11-19 Nokia Solutions And Networks Oy Procédé et appareil de transmission/réception de signaux de référence

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
NOKIA ET AL: "On LTE and NR coexistence on the same frequency", vol. RAN WG1, no. Spokane, U.S.A.; 20170116 - 20170120, 16 January 2017 (2017-01-16), XP051208570, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN1/Docs/> [retrieved on 20170116] *
NOKIA ET AL: "On the support for UL operation in FS3 and C-PDCCH", vol. RAN WG1, no. Nanjing, P.R. China; 20160523 - 20160527, 13 May 2016 (2016-05-13), XP051096826, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_85/Docs/> [retrieved on 20160513] *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021042394A1 (fr) * 2019-09-06 2021-03-11 Nokia Shanghai Bell Co., Ltd. Répétition de séquence pour une transmission de liaison montante non synchronisée
CN114342446A (zh) * 2019-09-06 2022-04-12 上海诺基亚贝尔股份有限公司 用于非同步上行链路传输的序列重复
CN114342446B (zh) * 2019-09-06 2024-02-13 上海诺基亚贝尔股份有限公司 用于非同步上行链路传输的序列重复

Similar Documents

Publication Publication Date Title
JP7227679B2 (ja) 時分割複信ワイヤレス通信システム
CN110601809B (zh) 信息发送方法及装置、信息接收方法及装置
EP2797355B1 (fr) Procédé et appareil de communication sans fil
US9154277B2 (en) Resource allocation and signaling for aperiodic sounding
EP3512288B1 (fr) Procédé de communication, station de base et dispositif terminal
EP3641454B1 (fr) Procédés de communication, dispositif de réseau, dispositif terminal, support de stockage lisible par ordinateur et produit programme d&#39;ordinateur
US11469852B2 (en) Signal sending and receiving method, and apparatus
US10582491B2 (en) Information transmission method and device
WO2016188391A1 (fr) Système et procédé de réservation de spectre sans licence
EP3595382B1 (fr) Procédé de transmission d&#39;informations de positionnement et dispositif de communication
JP2019186938A (ja) ライセンス不要アクセスについてのプリアンブルについての装置、システム、及び方法
US11690120B2 (en) Method and apparatus for a sub-band transpose repeater
EP3595384A1 (fr) Procédé de transmission d&#39;informations et dispositif associé
US10856295B2 (en) Communication method and communications device
WO2019030033A1 (fr) Appareil de communication, procédé, et programme informatique
EP3496352B1 (fr) Procédé et appareil de réglage de symbole
EP3288334B1 (fr) Procédé et appareil de transmission de données
CN119923925A (zh) 用于启用针对无线通信中的多个传输接收点的多个定时提前的系统、方法和装置
EP3506534B1 (fr) Procédé et dispositif d&#39;émission de signal
WO2020030290A1 (fr) Appareil, procédé et programme informatique
WO2024168681A1 (fr) Restriction sur une interruption totale pour bwp sans restriction
US20250233631A1 (en) Method and apparatus for reporting event-based measurement result
WO2023044815A1 (fr) Procédés et appareils pour un créneau de liaison latérale
WO2025157130A1 (fr) Procédés et appareils de détermination de ressources de domaine fréquentiel, et dispositif et support de stockage
WO2025173344A1 (fr) Terminal, station de base et procédé de communication

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18746943

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18746943

Country of ref document: EP

Kind code of ref document: A1