[go: up one dir, main page]

WO2016007060A1 - Dispositif de transmission, dispositif de réception, et procédés correspondants - Google Patents

Dispositif de transmission, dispositif de réception, et procédés correspondants Download PDF

Info

Publication number
WO2016007060A1
WO2016007060A1 PCT/SE2015/050152 SE2015050152W WO2016007060A1 WO 2016007060 A1 WO2016007060 A1 WO 2016007060A1 SE 2015050152 W SE2015050152 W SE 2015050152W WO 2016007060 A1 WO2016007060 A1 WO 2016007060A1
Authority
WO
WIPO (PCT)
Prior art keywords
packet
transmitting device
receiving device
determined
coding rate
Prior art date
Application number
PCT/SE2015/050152
Other languages
English (en)
Inventor
Leif Wilhelmsson
Bo Hagerman
Yi-Pin Eric Wang
Ali S. Khayrallah
Michael SAMUEL BEBAWY
Original Assignee
Telefonaktiebolaget L M Ericsson (Publ)
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 Telefonaktiebolaget L M Ericsson (Publ) filed Critical Telefonaktiebolaget L M Ericsson (Publ)
Priority to CA2991885A priority Critical patent/CA2991885A1/fr
Publication of WO2016007060A1 publication Critical patent/WO2016007060A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H04L1/001—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding applied to control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system

Definitions

  • the present disclosure relates to a transmitting device, a receiving device and methods performed therein.
  • Embodiments herein relate to wireless communication and in particular to methods and devices for communicating data using a flexible packet structure.
  • RAN Radio Access Network
  • CN core networks
  • a cell is a geographical area where radio coverage is provided by the radio base station at a base station site or an antenna site in case the antenna and the radio base station are not collocated.
  • Each cell is identified by an identity within the local radio area, which is broadcast in the cell. Another identity identifying the cell uniquely in the whole wireless communication network is also broadcast in the cell.
  • One base station may have one or more cells. The base stations communicate over the air interface operating on radio frequencies with the devices within range of the base stations.
  • a Universal Mobile Telecommunications System is a third generation mobile communication system, which evolved from the second generation (2G) Global System for Mobile Communications (GSM).
  • the UMTS terrestrial radio access network is essentially a RAN using wideband code division multiple access (WCDMA) and/or High Speed Packet Access (HSPA) for devices.
  • WCDMA wideband code division multiple access
  • HSPA High Speed Packet Access
  • 3GPP Third Generation Partnership Project
  • telecommunications suppliers propose and agree upon standards for third generation networks and UTRAN specifically, and investigate enhanced data rate and radio capacity.
  • 3GPP Third Generation Partnership Project
  • RNC radio network controller
  • BSC base station controller
  • EPS Evolved Packet System
  • E-UTRAN Universal Terrestrial Radio Access Network
  • LTE Long Term Evolution
  • EPC Evolved Packet Core
  • SAE System Architecture Evolution
  • E-UTRAN/LTE is a variant of a 3GPP radio access technology wherein the radio base stations are directly connected to the EPC core network rather than to RNCs.
  • the functions of a RNC are distributed between the radio base stations, e.g. eNodeBs in LTE, and the core network.
  • the Radio Access Network (RAN) of an EPS has an essentially "flat" architecture comprising radio base stations without reporting to RNCs.
  • a radio spectrum is generally divided into different parts, e.g. a licensed spectrum or bands, which comprise bandwidths of frequencies that may be used by e.g. wireless communication networks such as GSM, UMTS, LTE, and an unlicensed spectrum or bands, which comprise bandwidths of frequencies that may be used by e.g. short range communicating device, e.g. between devices using Wireless Local Area Network (WLAN) or Bluetooth wireless technology.
  • a licensed spectrum or bands which comprise bandwidths of frequencies that may be used by e.g. wireless communication networks such as GSM, UMTS, LTE
  • an unlicensed spectrum or bands which comprise bandwidths of frequencies that may be used by e.g. short range communicating device, e.g. between devices using Wireless Local Area Network (WLAN) or Bluetooth wireless technology.
  • WLAN Wireless Local Area Network
  • the part of the available spectrum allocated to unlicensed frequency bands is relatively large.
  • Common for many of these short range technologies is that they are based on ad-hoc methods and typically mandated courtesy roles to access the unlicensed frequency bands, e.g. Industrial, Scientific and Medical (ISM) bands.
  • ISM Industrial, Scientific and Medical
  • the communication operates under different radio channel conditions, ranging from good to really poor conditions with large dynamics.
  • An example of a situation that may result in a good radio channel condition is when the devices are close to each other in a line-of-sight position. Opposite, if the devices are far away from each other and the environment is such that there are objects like walls or large objects hindering and shadowing the radio signals these situations may create a poor radio channel condition.
  • the short range technologies are often operated without any power control mechanism.
  • Pilot symbols and synchronisation in particular should be sufficiently good for the most robust coding and modulation used for the data. This means that in case there is a large difference in robustness for the data, the
  • the sensor may be implemented using the most cost efficient and energy efficient technology in order to be as cheap as possible and to allow efficient operation on a coin cell battery.
  • the network node may be implemented with a radio link performance as the main design objective. This may effectively mean that it may be considerably simpler to demodulate a data packet transmitted from the network node, signal generated with high quality, than the same type of data packet transmitted from the sensor node.
  • a receiving device e.g.
  • a sensor or the network node has no information about the quality of the transmitted signal, it typically has to assume that the transmitted signal with the data packet is of a poor quality and thus will not be able to use more efficient methods in a receiving process relying on the signal is generated with a high quality.
  • a first algorithm in the receiving device may be very robust to frequency error in a transmitted signal, but the algorithm has relatively poor sensitivity. The sensitivity is the same regardless whether the frequency error is zero or very large.
  • a second algorithm may not be able to deal with large frequency errors, but in case there is no frequency error the performance is much better than for the robust one.
  • the receiving device may use the first algorithm as it assumes a poor quality. This results in an inefficient use of radio resources that may affect the performance of the wireless communication network.
  • An object is to provide a mechanism for providing an improved
  • the object is achieved by providing a method performed by a transmitting device for transmitting a packet to a receiving device in a wireless communication network.
  • the transmitting device determines one or more of: a radio channel condition of a channel between the transmitting device and the receiving device, a coding rate or modulation of the packet, a coding rate of a header of the packet, and a quality of the transmitting device and/or the receiving device. Furthermore, the transmitting device
  • the transmitting device determines a packet structure based on the determined radio channel condition, the determined coding rate or modulation of the packet, the determined coding rate of the header of the packet, and/or the determined quality of the transmitting device and/or the receiving device.
  • the transmitting device then transmits data with the determined packet structure to the receiving device.
  • the object is achieved by providing a method performed by a receiving device for receiving a packet from a transmitting device in a wireless communication network.
  • the receiving device receives a packet with a packet structure from the transmitting device.
  • the receiving device transmits, to the transmitting device, at least one of: a received signal quality at the receiving device, a quality of the receiving device, and a feedback relating to the previously received packet associated with a radio channel condition of a channel between the receiving device and the transmitting device.
  • the receiving device receives data in an adjusted packet structure from the transmitting device, the adjusted packet structure being based on the radio channel condition and/or a quality of the transmitting device and/or the receiving device.
  • the object is achieved by providing a transmitting device for transmitting a packet to a receiving device in a wireless communication network.
  • the transmitting device is configured to determine one or more of: a radio channel condition of a channel between the transmitting device and the receiving device, a coding rate or modulation of the packet, a coding rate of a header of the packet, and a quality of the transmitting device and/or the receiving device.
  • the transmitting device is configured to determine a packet structure based on the determined radio channel condition, the determined coding rate or modulation of the packet, the determined coding rate of the header of the packet, and/or the determined quality of the transmitting device and/or the receiving device.
  • the transmitting device is also configured to transmit data with the determined packet structure to the receiving device.
  • the object is achieved by providing a receiving device for receiving a packet from a transmitting device in a wireless communication network.
  • the receiving device is configured to receive a packet with a packet structure from the transmitting device.
  • the receiving device is further configured to transmit, to the transmitting device, at least one of: a received signal quality at the receiving device, a quality of the receiving device, and a feedback relating to the previously received packet associated with a radio channel condition of a channel between the receiving device and the transmitting device.
  • the receiving device is further configured to receive data in an adjusted packet structure from the transmitting device, the adjusted packet structure being based on the radio channel condition and/or a quality of the transmitting device and/or the receiving device.
  • the resources are efficiently used as the receiving device may use an appropriate algorithm for the radio channel condition/coding rate/modulation/quality of the devices, leading to an improved performance of the wireless communication network.
  • Determining packet structure covers: determining synchronization word in the packet;
  • determining length of synchronization word or header in the packet determining density of pilot signals in the packet; and/or changing a coding or modulation for a header in the packet.
  • Figure 1 is a schematic overview depicting a wireless communication network according to embodiments herein.
  • Figure 2a is a schematic flowchart depicting a method performed in a first communication device according to embodiments herein.
  • Figure 2b is a schematic flowchart depicting a method performed in a second communication device according to embodiments herein.
  • Figure 3a is an illustration of an example of a packet to be transmitted to a receiving device.
  • Figure 3b is an illustration of another example of a packet to be
  • Figure 4 is an illustration of an example of a packet to be transmitted to a receiving device, wherein the (length of the) syncword is flexible.
  • Figure 5 is an illustration of an example of a packet to be transmitted to a receiving device, wherein the (length of the) syncword is dependent on the quality of the transmitting and/or the receiving device.
  • Figure 6 is an illustration of an example of a packet to be transmitted to a receiving device, wherein the density of the pilot symbols depends at least partly on a channel quality.
  • Figure 7 is an illustration of how successively longer syncwords may be generated.
  • Figure 8 is a flowchart of a method performed by a transmitting device for transmitting a packet to a receiving device according to an exemplifying
  • Figure 9 is a block diagram of a transmitting device adapted for transmitting a packet to a receiving device according to an exemplifying
  • Figure 10 is a block diagram of a transmitting device for transmitting a packet to a receiving device according to an exemplifying embodiment.
  • Figure 1 1 is a block diagram of an arrangement in a transmitting device adapted for transmitting a packet to a receiving device according to an
  • Figure 12 is a block diagram depicting a receiving device according to embodiments herein. Detailed description
  • Fig. 1 is a schematic overview depicting a wireless communication network 1.
  • the wireless communication network 1 comprises one or more RANs and one or more CNs.
  • the wireless communication network 1 may use a number of different technologies, such as Long Term Evolution (LTE), LTE-Advanced, Wideband Code Division Multiple Access (WCDMA), Global System for Mobile communications/Enhanced Data rate for GSM Evolution (GSM/EDGE), Worldwide Interoperability for Microwave Access (WiMax), or Ultra Mobile Broadband (UMB), just to mention a few possible implementations.
  • LTE Long Term Evolution
  • WCDMA Wideband Code Division Multiple Access
  • GSM/EDGE Global System for Mobile communications/Enhanced Data rate for GSM Evolution
  • WiMax Worldwide Interoperability for Microwave Access
  • UMB Ultra Mobile Broadband
  • the wireless communication network 1 is exemplified herein as a Bluetooth network.
  • a receiving device 10 exemplified as a wireless device, also known as a receiving communication device, e.g. a mobile station, a user equipment and/or a wireless terminal, communicates via a RAN to one or more CNs.
  • wireless device is a non-limiting term which means any wireless terminal, user equipment, Machine Type Communication (MTC) device, a Device to Device (D2D) terminal, or node e.g. Personal Digital Assistant (PDA), laptop, mobile phone, sensor, relay, mobile tablets or even a small base station communicating within respective cell.
  • MTC Machine Type Communication
  • D2D Device to Device
  • PDA Personal Digital Assistant
  • the wireless communication network 1 covers a geographical area which is divided into cell areas, e.g. a cell 11 being served by a radio access network node.
  • the radio access network node is an example of a transmitting device 12.
  • the radio access network node may also be referred to as a radio base station such as a NodeB, an evolved Node B (eNB, eNode B), a base transceiver station, Access Point Base Station, base station router, or any other network unit capable of communicating with a wireless device within the cell 1 1 served by the radio access network node depending e.g. on the radio access technology and terminology used.
  • the radio access network node may serve one or more cells, such as the cell 1 1 .
  • a cell is a geographical area where radio coverage is provided by radio base station equipment at a base station site or at remote locations in Remote Radio Units (RRU).
  • the cell definition may also incorporate frequency bands and radio access technology used for transmissions, which means that two different cells may cover the same geographical area but using different frequency bands.
  • Each cell is identified by an identity within the local radio area, which is broadcast in the cell. Another identity identifying the cell 1 1 uniquely in the whole wireless communication network 1 is also broadcasted in the cell 1 1 .
  • the radio access network node communicates over the air or radio interface operating on radio frequencies with the wireless device within range of the radio access network node.
  • the wireless device transmits data over the radio interface to the radio access network node in Uplink (UL) transmissions and the radio access network node transmits data over an air or radio interface to the wireless device in
  • UL Uplink
  • the receiving device 10 is exemplified as a wireless device and the transmitting device 12 is exemplified as a radio access network node.
  • the transmitting device 12 may be the wireless device and the receiving device 10 may be the radio access network node, or both the receiving device 10 and the transmitting device 12 may be wireless devices, e.g. sensors, communicating.
  • the transmitting device 12 may pair with the receiving device 10. During this pairing the transmitting device 12 and the receiving device 10 may exchange information such as quality of the different devices and/or radio channel conditions.
  • the transmitting device 12 determines one or more of: a radio channel condition of a channel between the transmitting device 12 and the receiving device 10, a coding rate or modulation of the packet, a coding rate of a header of the packet, and a quality of the transmitting device 12 and/or the receiving device 10.
  • the transmitting device 12 may determine the radio channel condition by determining at least one of: a received signal quality at the receiving device 10, and a feedback received from the receiving device 10 relating to a previously transmitted packet.
  • the transmitting device 12 determines a packet structure based on the determined radio channel condition, the determined coding rate or modulation of the packet, the determined coding rate of the header of the packet, and/or the determined quality of the transmitting device 12 and/or the receiving device 10. For example, the transmitting device 12 may determine a
  • the transmitting device 12 may determine the packet structure by determining a shorter synchronisation word when a higher coding rate is used for data than a synchronisation word when a lower coding rate is used for data.
  • the synchronisation word may be constructed by repeating one shorter
  • the transmitting device 12 may, additionally or alternatively, determine a density of pilot signals in the packet structure based on the determined radio channel condition, the determined coding rate or modulation of the packet, the determined coding rate of the header of the packet, and/or the determined quality of the transmitting device 12 and/or the receiving device 10.
  • the transmitting device 12 may determine the packet structure by changing a coding or modulation for the header in the packet structure based on a coding or modulation used for a user data.
  • the transmitting device 12 may determine the packet structure by changing length of a header in the packet structure based on the determined radio channel condition, the determined coding rate or modulation of the packet, the determined coding rate of the header of the packet, and/or the determined quality of the transmitting device 12 and/or the receiving device 10.
  • the transmitting device 12 determines or selects the packets structure to minimize overhead in the packet structure. That quality of the transmitting device 12 and/or the receiving device 10 is taken into account means that accuracy of the transmitting device 12 and/or the receiving device 10 may be taken into account when determining the packet structure.
  • Action 204 The transmitting device 12 transmits data with the determined packet structure to the receiving device 10.
  • Action 212 The receiving device 10 receives a packet with a packet structure from the transmitting device 12.
  • the receiving device 10 transmits to the transmitting device 12, at least one of: a received signal quality at the receiving device 10, a quality of the receiving device 10, and a feedback relating to the previously received packet associated with a radio channel condition of a channel between the receiving device 10 and the transmitting device 12.
  • Action 214 The receiving device 10 receives data in an adjusted packet structure from the transmitting device 12, the adjusted packet structure being based on the radio channel condition and/or the quality of the transmitting device 12 and/or the receiving device 10.
  • a packet comprises a synchronisation word, hereinafter referred to as a syncword, a header field, and a data field as illustrated in Figure 3a.
  • the syncword may be used for synchronisation, for instance time and frequency estimation; the header field may comprise the address of the intended receiving device 10, and possibly also of the transmitting device 12 in case that is needed, the length of the packet, and the modulation and coding scheme that is used for the actual data; and the data field may comprise the actual data.
  • the syncword there may be a preamble and a syncword, and the contents of the header may vary.
  • the data field may contain some control information or may contain only user data. Regardless of which is the exact packet structure, the present disclosure is applicable.
  • Figure 3b shows a packet with pilot symbols or pilots in the data field.
  • the sensitivity may be defined in absolute terms of the received power, e.g., - 100 dBm, or it may be conveniently defined by the signal-to-noise-ratio (SNR), e.g. 3 dB. In embodiments described herein, the latter will be used.
  • SNR signal-to-noise-ratio
  • Embodiments described herein will only discuss in terms of changed coding rate, assuming the same modulation is used all the time. In a more general case, both coding and modulation may be changed to make the transmission more or less robust. All embodiments also cover the case that also the modulation would have been possible to change, but for the sake of simplicity the examples are only discussing in terms of changing coding rate. One skilled in the art would understand how the embodiments are to be interpreted in case of more than one possible modulation format are used and how this relates to the data rate.
  • the above numbers may correspond to a situation where the receiving device 10 has been properly synchronised to the transmitting device 12, i.e. both time and frequency may have been estimated, compensations may have been made, etc.
  • a suitable syncword is needed.
  • the lower the operating point, i.e. , the lower the received SNR the harder it becomes to synchronise.
  • the transmitting device 12 determines a radio channel condition, a coding rate of the packet, a coding rate of a header of the packet, and/or a quality of the transmitting device 12 and/or the receiving device 10, and then determines, e.g. adjusts, a packet structure based on the determined radio channel condition, the determined coding rate of the packet, the determined coding rate of the header of the packet, and/or the determined quality of the transmitting device 12 and/or the receiving device 10. The transmitting device 12 then transmits data with the determined packet structure.
  • the channel radio condition may be determined based on at least one of: a received signal quality at the receiving device 10, and a feedback received from the receiving device 10 relating to a previously transmitted packet.
  • the transmitting device 12 may determine the packet structure by choosing a synchronisation word depending on the coding rate used for the data.
  • Figure 4 shows a first packet with a first syncword 41 , a first header 42 and a high rate data field 43, a second packet with a second syncword 44, a second header 45 and a medium rate data field 46, a third packet with a third syncword 47, a third header 48 and a low rate data field 49.
  • a shorter syncword may be selected the higher the coding rate, i.e. a smaller L.
  • the longer syncwords are constructed by repeating one of the shorter syncwords an integer number of times. This is illustrated in Figure 5.
  • the coding required for the header may depend on the operating point/condition, so also covered by this embodiment is when the coding for the header may be selected based on the coding used for the user data. In Figure 6 this is illustrated. Thus this embodiment covers the case that at least one of the syncword and the coding scheme used for the header may be made flexible and may be selected based on the coding scheme used for the data payload.
  • Another property that may impact the performance of a receiver, i.e. the receiving device 10, is the received signal accuracy of, for instance, the time and frequency. This may for instance be the spread, tolerance, in a crystal oscillator, but it could also be what kind of architecture and component quality that is used for implementing a transmitter.
  • an accurate transmitter with an accuracy of 1 ppm means that this corresponds to a frequency error of 2.5 kHz when the carrier frequency is 2.5 GHz.
  • the frequency error may instead be 125kHz.
  • 'Accuracy' may be used herein but also 'quality' of the transmitting device 12 and the receiving device 10 is used herein.
  • the receiving device 10 may have to use some more robust mechanism, at least partly based on non-coherent combining.
  • the receiving device 10 does not know if the frequency error may be large, the receiving device 10 has to use the robust one since if in fact there is a large frequency error a less robust algorithm will not work. If it is so, however, that the signal is of high accuracy and with no frequency error it has been wasteful to use this robust mode.
  • Methods for coherent and non-coherent combining are well known in the art, and so is when it is preferable to use the respective technique.
  • this quality knowledge may be exploited in that if it is known that both the transmitting device 12 and the receiving device 10 are accurate, a more efficient synchronisation technique may be used and thereby a shorter syncword 61 may be used resulting in reduced overhead.
  • a somewhat longer syncword 62 In case the transmitting device 12 is accurate, whereas the receiver is not (or vice versa), a somewhat longer syncword 62, and finally, if both the transmitter and the receiver have low accuracy, e.g. only fulfilling the minimum requirements from specification, an even longer syncword 63 may be used.
  • This embodiment is illustrated in Figure 5. In this fig. 6 also the length of the header is changed based on the accuracy of the transmitter and the receiver.
  • a short header 64 may be used if both the transmitting device 12 and the receiving device 10 has high accuracy, i.e. high quality of the transmitting device 12 and the receiving device 10.
  • a normal header 65 may be used if one of the transmitting device 12 and the receiving device 10 has high accuracy.
  • a long header 66 may be used if none of the transmitting device 12 and the receiving device 10 has high accuracy. This header change may or may not be used, but both cases are covered by this embodiment.
  • the information about transmitting device 12 and the receiving device 10 accuracy e.g., high or minimum accuracy or quality, may be stored and updated in a device memory, storing information about the paired devices. For example, if the transmitting device 12 has been successfully paired with receiving device 10 and learned about receiving device's
  • the transmitting device 12 can store this information along with other information it stores regarding to receiving device 10.
  • respective address may be reserved for respective device meeting higher TX/RX accuracy requirements.
  • a proper syncword may be selected dependent on a recipient address.
  • pilot symbols are commonly known as pilot symbols, or just pilots. As these pilots are overhead and do not carry explicit information, it may be desirable to send as few of these as possible. On the other hand, a sufficient number of pilots may be needed in order to ensure that the data may be properly demodulated. Typically, the more variations there are in the signal, either due to varying radio channel conditions or due to variations in the transmitting device 12 and the receiving device 10, the more dense the pilots need to be sent.
  • a third property that may depend on the radio channel condition (SNR), also referred to as operating point, but in particular on the accuracy of the transmitting device 12 and the receiving device 10, is how much pilots are used in the transmission, e.g. how many data symbols are transmitted between two pilots.
  • SNR radio channel condition
  • the suitable syncword may be based at least partly on feedback from the receiving device 10 to potentially further minimise the overhead.
  • This feedback may either be explicit or implicit.
  • the receiving device 10 may signal specific information or index pointing out the syncword to use, e.g. if there are 8 different syncwords numbered between 0 up to 7 to select from, the receiving device 10 may signal a selection value of '3' as example.
  • An example of implicit signalling is that the transmitting device 10 may receive acknowledgements on safe received data packages and may draw conclusion from that.
  • the method how to utilise such implicit measurements to find the syncword or amount of pilots to use is disclosed. The method may be
  • the first packet is transmitted using a best performing, i.e. longest, syncword; if the transmission is acknowledged a second packet is transmitted with a shorter syncword e.g. a second most reliable syncword; if this
  • a third packet is transmitted with a yet shorter syncword e.g. a third most reliable syncword, etc. If the transmitting device 12 reaches a shortest possible syncword and the transmitting device 12 keeps receiving acknowledgements on received packets, then no further reduction in the syncword length is done. On the other hand, when no acknowledgement is received; then for example a last packet is re-transmitted with the same syncword as used at the failure; if this re-transmission also fails, i.e. no
  • the transmitting device 12 may re-transmit the packet again with a next more robust, i.e. longer syncword, until acknowledgement is received. Alternatively, no repetition of the failed syncword length is done, and a length increase is done in the next re-transmission directly.
  • Embodiments cover different starting selection of syncword as well different selections of syncwords in the iterative stages. Further the embodiments also cover the selection of the starting syncword both as random, according to some other criteria as received power level of packets from the receiving device 10 or as the transmitting device 12 has recorded and stored in memory a latest previous used syncword or related quality needed.
  • the transmitting device 12 and the receiving device 10 may send and/or receive one or more messages exchanging different information about themselves.
  • the information they exchange may for example relate to capabilities they have.
  • the procedures or methods for getting paired may be Bluetooth, Wi-Fi based, HomeRF, 802.1 1 technologies or similar.
  • the packet may comprise, as described above, a syncword, a header and a data part.
  • Figure 8 is a flowchart of an exemplifying embodiment of a method 800 performed by the transmitting device 12 for transmitting the packet to the receiving device 10. Firstly, the transmitting device 12 gets paired 810 with the receiving device 10. Then the transmitting device 12 determines 820 at least one of: the coding rate or modulation of the data, the coding rate of the header, the received signal quality, the quality of the transmitting device 12 and/or the receiving device 10, and feedback received from the receiving device 10 relating to a previous transmitted packet.
  • the transmitting device 12 may then generate or determine 830 a syncword to be included in the packet to be sent to the receiving device 10.
  • the transmitting device 12 thus determines the syncword based on at least one of the coding rate or modulation of the data, the coding rate of the header, the received signal quality such as e.g. SNR or Signal to Noise and Interference Ratio (SINR) quality of the transmitting device 12 and/or the receiving device 10, and feedback received from the receiving device 10 relating to a previous transmitted packet.
  • Determining the syncword may comprise determining the length of the syncword and/or the syncword itself.
  • the coding rate of the data and the coding rate of the header may be known to the transmitting device 12, since it is the transmitting device 12 that determines the respective coding rate.
  • the received signal quality may be obtained in different ways.
  • the transmitting device 12 may measure the received signal quality of signals received from the receiving device 10, either when receiving data packets transmitted from the receiving device 10 or during the procedure for getting paired when the transmitting device 12 and the receiving device 10 transmit and receive various signals for exchanging information.
  • the transmitting device 12 may alternatively receive a measurement report from the receiving device 10 relating to the received signal quality of a previously
  • the received signal quality may be mapped to a coding rate.
  • Information relating to the quality or accuracy of the transmitting device 12 and the receiving device 10 may be exchanged between the devices at some point, for example during the procedure to become paired.
  • the transmitting device 12 has knowledge of the quality of the receiving device 10 as well as its own quality.
  • the receiving device 10 may send
  • acknowledgements of received transmissions which may indicate either just received or may alternatively also comprise information about e.g. received signal quality or any other information that the transmitting device 12 may use to deduce that the syncword of the previous transmission was just enough or possible too long.
  • the transmitting device 12 may further determine a density of pilot symbols to use in the packet to be sent to the receiving device 10.
  • transmitting device 12 may determine the density, i.e. how many pilot symbols to insert in the packet, based on e.g. the received signal quality and/or the quality of the transmitting device 12 and/or the receiving device 10.
  • Embodiments herein may minimise the overhead that is needed in a packet based system where more than one fixed packet type, data rate and/or operational condition are used.
  • Embodiments herein may also allow for decreased overhead in case the transmitter, the receiver, or both transmitter and receiver are implemented with a better quality i.e. accuracy and performance than minimum required by the specification.
  • a reduced overhead may directly translate into improved power efficiency, increased battery life, reduced interference to other devices, and smaller probability of being interfered by other devices. This in its turn leads to an improved performance of the wireless communication network 1.
  • a transmitting device 12 where at least one of the synchronisation word and the modulation and coding used for the header of a packet may at least in part be selected based on what coding and modulation is used for the data part of the packet.
  • a longer synchronisation word may be used the more robust coding and/or modulation is used for the data part of the packet.
  • a more robust coding scheme for the header may be selected when a more robust coding scheme is used for the data.
  • a transmitting device 12 and a communication system are disclosed where there are more than one possible syncword and where the selected syncword to be used may at least partly be based on the accuracy of at least one of the transmitting device 12 and the receiving device 10.
  • a transmitting device 12 and a communication system are disclosed using pilots embedded in the data part of the signal, wherein the fraction of pilots relative to the data is dependent on what modulation and coding is used for the data.
  • a transmitting device 12 and a communication system are disclosed using pilots embedded in the data part of the signal/packet, wherein the fraction of pilots relative to the data may be dependent on the accuracy of at least one of the transmitting wireless device and the receiving wireless device.
  • a transmitting device 12 and a communication system are disclosed, where a higher fraction of pilots may be used the less accurately the at least one of the transmitting wireless device and receiving wireless device is.
  • a transmitting device 12 and a communication system are disclosed, where more than one syncword may be used, and where the longer syncwords are constructed by repeating one of the shorter syncwords an integer number of times.
  • Fig. 9 is a block diagram of the transmitting device 12 adapted to perform the methods described above for transmitting a packet to the receiving device 10 in the wireless communication network 1.
  • the transmitting device 12 is configured to determine one or more of: a radio channel condition of a channel between the transmitting device 12 and the receiving device 10, a coding rate or modulation of the packet, a coding rate of a header of the packet, and a quality of the
  • the transmitting device 12 is configured to determine a packet structure based on the determined radio channel condition, the determined coding rate or modulation of the packet, the determined coding rate of the header of the packet, and/or the determined quality of the transmitting device 12 and/or the receiving device 10.
  • the transmitting device 12 is further configured to transmit data with the determined packet structure to the receiving device 10.
  • the transmitting device 12 may further be configured to determine the radio channel condition based on at least one of: a received signal quality at the receiving device 10, and a feedback received from the receiving device 10 relating to a previously transmitted packet.
  • the transmitting device 12 may further be configured to determine packet structure by determining a synchronisation word in the packet structure based on the determined radio channel condition, the determined coding rate or modulation of the packet, the determined coding rate of the header of the packet, and/or the determined quality of the transmitting device 12 and/or the receiving device 10.
  • the transmitting device 12 may further be configured to determine packet structure by determining a shorter synchronisation word when a higher coding rate is used for data than a synchronisation word when a lower coding rate is used for data.
  • the transmitting device 12 may further be configured to construct the synchronisation word by repeating one shorter synchronisation word an integer number of times.
  • the transmitting device 12 may be configured to determine packet structure by determining a density of pilot signals in the packet structure based on the determined radio channel condition, the determined coding rate or modulation of the packet, the determined coding rate of the header of the packet, and/or the determined quality of the transmitting device 12 and/or the receiving device 10.
  • the transmitting device 12 may be configured to determine packet structure by changing a coding or modulation for the header in the packet structure based on a coding or modulation used for a user data.
  • the transmitting device 12 may be configured to determine packet structure by changing length of a header in the packet structure based on the determined radio channel condition, the determined coding rate or modulation of the packet, the determined coding rate of the header of the packet, and/or the determined quality of the transmitting device 12 and/or the receiving device 10.
  • the transmitting device 12 may further be configured to pair the transmitting device 12 with the receiving device 10.
  • the transmitting device 12 may further be configured to determine the packet structure to minimize overhead in the packet structure.
  • the transmitting device 12 may comprise a processor 921 and memory
  • Figure 9 also illustrates the transmitting device 12 comprising a memory 910. It shall be pointed out that figure 9 is merely an exemplifying illustration and memory 910 may be optional, be a part of the memory 922 or be a further memory of the transmitting device 12.
  • the memory may for example comprise information relating to the transmitting device 12, to statistics of operation of the transmitting device 12, just to give a couple of illustrating examples.
  • the memory 910 comprises information relating to the receiving device, e.g. obtained during the pairing of the transmitting and the receiving device.
  • Figure 9 further illustrates the transmitting device 12 comprising processing means 920, which comprises the memory 922 and the processor 921 . Still further, figure 9 illustrates the transmitting device 12 comprising a communication unit 930.
  • communication unit 930 may comprise an interface through which the transmitting device 12 communicates with other nodes or entities of the wireless
  • Figure 9 also illustrates the transmitting device 12 comprising further functionality 940.
  • the further functionality 940 may comprise hardware of software necessary for the transmitting device 12 to perform different tasks that are not disclosed herein.
  • FIG. 10 is a block diagram of the transmitting device 12 for performing the methods described above.
  • the transmitting device 900 is an example and illustrated comprising a receiving unit 1003 for receiving transmissions and signals from other nodes and devices, e.g. receiving device 10 during pairing.
  • the transmitting device 12 is also illustrated comprising a pairing unit 1004 for performing actions relating to the pairing process with another device, e.g. the receiving device 10.
  • the transmitting device 12 is illustrated comprising a determining unit 1005 for determining e.g. the syncword as described above and a transmitting unit 1006 for transmitting the packet to another node or device, e.g. receiving device 10.
  • the processing means 920 and/or the determining unit 1005 may be configured to determine one or more of: a radio channel condition of a channel between the transmitting device 12 and the receiving device 10, a coding rate or modulation of the packet, a coding rate of a header of the packet, and a quality of the transmitting device 12 and/or the receiving device 10.
  • the processing means 920 and/or the determining unit 1005 may be configured to determine a packet structure based on the determined radio channel condition, the determined coding rate or modulation of the packet, the determined coding rate of the header of the packet, and/or the determined quality of the transmitting device 12 and/or the receiving device 10.
  • the processing means 920 and/or the transmitting unit 1006 may be configured to transmit data with the determined packet structure to the receiving device 10.
  • the processing means 920 and/or the determining unit 1005 may be configured to determine the radio channel condition based on at least one of: a received signal quality at the receiving device 10, and a feedback received from the receiving device 10 relating to a previously transmitted packet.
  • the processing means 920 and/or the determining unit 1005 may be configured to determine packet structure by determining a synchronisation word in the packet structure based on the determined radio channel condition, the determined coding rate or modulation of the packet, the determined coding rate of the header of the packet, and/or the determined quality of the transmitting device 12 and/or the receiving device 10.
  • the processing means 920 and/or the determining unit 1005 may be configured to determine packet structure by determining a shorter synchronisation word when a higher coding rate is used for data than a synchronisation word when a lower coding rate is used for data. [00099] The processing means 920 and/or the determining unit 1005 may be configured to construct the synchronisation word by repeating one shorter synchronisation word an integer number of times.
  • the processing means 920 and/or the determining unit 1005 may be configured to determine packet structure by determining a density of pilot signals in the packet structure based on the determined radio channel condition, the determined coding rate or modulation of the packet, the determined coding rate of the header of the packet, and/or the determined quality of the transmitting device 12 and/or the receiving device 10.
  • the processing means 920 and/or the determining unit 1005 may be configured to determine packet structure by changing a coding or modulation for the header in the packet structure based on a coding or modulation used for a user data.
  • the processing means 920 and/or the determining unit 1005 may be configured to determine packet structure by changing length of a header in the packet structure based on the determined radio channel condition, the determined coding rate of the packet, the determined coding rate or modulation of the header of the packet, and/or the determined quality of the transmitting device 12 and/or the receiving device 10.
  • the processing means 920 and/or the pairing unit 1004 may be configured to pair the transmitting device 12 with the receiving device 10.
  • the processing means 920 and/or the determining unit 1005 may be configured to determine the packet structure to minimize overhead in the packet structure.
  • the transmitting device 12 is also illustrated comprising a communication unit 1001. Through this communication unit 1001 , the
  • the transmitting device 12 is adapted to communicate with other nodes and/or entities in the wireless communication network 1 .
  • the communication unit 1001 may comprise more than one receiving arrangement.
  • the communication unit 1001 may be connected to both a wire and an antenna, by means of which the transmitting device 12 enabled to communicate with other nodes and/or entities and devices in the wireless communication network.
  • the communication unit 1001 may comprise more than one transmitting arrangement, which in turn may be connected to both a wire and an antenna, by means of which the transmitting device 12 is enabled to communicate with other nodes and/or entities and devices in the wireless communication network.
  • the transmitting device 12further comprises a memory 1002 for storing data.
  • the transmitting device 12 may comprise a control or processing unit (not shown) which in turn is connected to the different units 1003-1006. It shall be pointed out that this is merely an illustrative example and the transmitting device 12 may comprise more, less or other units or modules which execute the functions of the transmitting device 12 in the same manner as the units illustrated in Fig. 10.
  • Fig. 10 merely illustrates various functional units in the transmitting device 12 in a logical sense.
  • the functions in practice may be implemented using any suitable software and hardware means/circuits etc.
  • the embodiments are generally not limited to the shown structures of the transmitting device 12 and the functional units.
  • the previously described exemplary embodiments may be realised in many ways.
  • one embodiment includes a computer-readable medium having instructions stored thereon that are executable by the control or processing unit for executing the method steps in the transmitting device 12.
  • the instructions executable by the computing system and stored on the computer-readable medium perform the method steps of the transmitting device 12 as described above.
  • Fig. 11 schematically shows an embodiment of an arrangement in the transmitting device 12.
  • a processing unit 1106 e.g. with a Digital Signal Processor, DSP.
  • the processing unit 1006 may be a single unit or a plurality of units to perform different actions of procedures described herein.
  • the transmitting device 12 may also comprise an input unit 1102 for receiving signals from other entities, and an output unit 1104 for providing signal(s) to other entities.
  • the input unit 1 102 and the output unit 1 104 may be arranged as an integrated entity or as illustrated in the example of figure 10, as one or more interfaces or communication units 1001 .
  • the arrangement in the transmitting device 12 comprises at least one computer program product 1108 in the form of a non-volatile memory, e.g. an Electrically Erasable Programmable Read-Only Memory (EEPROM), a flash memory and a hard drive.
  • the computer program product 1 108 comprises a computer program 1110, which comprises code means, which when executed in the processing unit 1 106 in the arrangement in the transmitting device 12 causes the transmitting device 12 to perform the actions e.g. of the procedure described earlier, for example as in Fig. 2.
  • the computer program 1 1 10 may be configured as a computer program code structured in computer program modules 1110a-1110e.
  • the code means in the computer program of the transmitting device 12 comprises a receiving unit, or module, for receiving transmissions and signals from other nodes and devices, e.g. receiving device.
  • the computer program further comprises a pairing unit, or module, for performing actions relating to the pairing process with another device, e.g. receiving device 10.
  • the computer program comprises a determining unit, or module, for determining the syncword as described above and a transmitting unit, or module, for transmitting the packet to another node or device, e.g. receiving device 10.
  • the computer program modules could essentially perform the actions described above, or of the flow illustrated in Fig. 2, to emulate the transmitting device 12.
  • the different computer program modules when executed in the processing unit 1 106, they may correspond to the units 1003-1006 of Fig. 10.
  • code means in the embodiments and examples disclosed above may be implemented as computer program modules which when executed in the processing unit causes the transmitting device to perform the actions described above, at least one of the code means may in alternative embodiments be implemented at least partly as hardware circuits.
  • the processor may be a single Central Processing Unit, CPU, but could also comprise two or more processing units.
  • the processor may include general purpose microprocessors; instruction set processors and/or related chips sets and/or special purpose microprocessors such as Application Specific Integrated Circuits, ASICs.
  • the processor may also comprise board memory for caching purposes.
  • the computer program may be carried by a computer program product connected to the processor.
  • the computer program product may comprise a computer readable medium on which the computer program is stored.
  • the computer program product may be a flash memory, a Random-Access Memory RAM, Read-Only Memory, ROM, or an EEPROM, and the computer program modules described above could in alternative embodiments be distributed on different computer program products in the form of memories within the transmitting device.
  • Fig. 12 is a block diagram depicting the receiving device 10 for receiving a packet from a transmitting device 12 in a wireless communication network 1 .
  • the receiving device 10 is configured to receive a packet with a packet structure from the transmitting device 12.
  • the receiving device 10 is further configured to transmit, to the transmitting device 12, at least one of: a received signal quality at the receiving device 10, a quality of the receiving device 10, and a feedback relating to the previously received packet associated with a radio channel condition of a channel between the receiving device 10 and the transmitting device 12.
  • the receiving device 10 is further configured to receive data in an adjusted packet structure from the transmitting device 12, the adjusted packet structure being based on the radio channel condition and/or a quality of the transmitting device 12 and/or the receiving device 10.
  • the receiving device 10 may further be configured to pair the receiving device 10 with the transmitting device 12.
  • the receiving device 10 may comprise processing means 1201.
  • the receiving device may comprise a receiving module 1202.
  • the processing means 1201 and/or the receiving module 1202 may be configured to receive the packet with a packet structure from the transmitting device 12.
  • the processing means 1201 and/or the receiving module 1202 may further be configured to receive data in an adjusted packet structure from the transmitting device 12, the adjusted packet structure being based on the radio channel condition and/or a quality of the transmitting device 12 and/or the receiving device 10.
  • the receiving device may comprise a transmitting module 1203.
  • the processing means 1201 and/or the transmitting module 1203 may be configured to transmit, to the transmitting device 12, at least one of: a received signal quality at the receiving device 10, a quality of the receiving device 10, and a feedback relating to the previously received packet associated with a radio channel condition of a channel between the receiving device 10 and the transmitting device 12.
  • the receiving device may comprise a pairing module 1204.
  • the processing means 1201 and/or the pairing module 1204 may be configured to pair the receiving device 10 with the transmitting device 12.
  • the methods according to the embodiments described herein for the receiving device 10 are respectively implemented by means of e.g. a computer program 1205 or a computer program product, comprising instructions, i.e., software code portions, which, when executed on at least one processor, cause the at least one processor to carry out the actions described herein, as performed by the receiving device 10.
  • the computer program 1205 may be stored on a computer-readable storage medium 1206, e.g. a disc or similar.
  • the computer- readable storage medium 1206, having stored thereon the computer program may comprise the instructions which, when executed on at least one processor, cause the at least one processor to carry out the actions described herein, as performed by the receiving device 10.
  • the computer- readable storage medium may be a non-transitory computer-readable storage medium.
  • functions means or modules may be implemented using digital logic and/or one or more microcontrollers, microprocessors, or other digital hardware. In some embodiments, several or all of the various functions may be implemented together, such as in a single application-specific integrated circuit (ASIC), or in two or more separate devices with appropriate hardware and/or software interfaces between them. Several of the functions may be implemented on a processor shared with other functional components of a wireless device or network node, for example.
  • ASIC application-specific integrated circuit
  • processors or “controller” as used herein does not exclusively refer to hardware capable of executing software and may implicitly include, without limitation, digital signal processor (DSP) hardware, read-only memory (ROM) for storing software, random-access memory for storing software and/or program or application data, and non-volatile memory.
  • DSP digital signal processor
  • ROM read-only memory
  • RAM random-access memory
  • non-volatile memory non-volatile memory
  • a method performed by a transmitting device for transmitting a packet to a receiving device may comprise pairing itself with the receiving device; and determining at least one of coding rate of the data, coding rate of the header, received signal quality, quality of the transmitting device and/or the receiving device, and feedback received from the receiving device relating to a previous transmitted packet.
  • the method may further comprise determining a syncword (synchronisation word) based on at least one of coding rate of the data, coding rate of the header, received signal quality, quality of the transmitting device and/or the receiving device, and feedback received from the receiving device relating to a previous transmitted packet.
  • a transmitting device adapted for transmitting a packet to a receiving device.
  • the transmitting device may be configured to pair itself with the receiving device; and to determine at least one of coding rate of the data, coding rate of the header, received signal quality, quality of the transmitting device and/or the receiving device, and feedback received from the receiving device relating to a previous transmitted packet.
  • the transmitting device may further be configured to determine a syncword based on at least one of coding rate of the data, coding rate of the header, received signal quality, quality of the transmitting device and/or the receiving device, and feedback received from the receiving device relating to a previous transmitted packet.

Landscapes

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

Abstract

Des modes de réalisation de l'invention concernent un procédé exécuté par un dispositif de transmission (12) pour transmettre un paquet à un dispositif de réception dans un réseau de communications sans fil. Le dispositif de transmission (12) : détermine un ou plusieurs d'un état de canal radio d'un canal entre le dispositif de transmission (12) et le dispositif de réception (10), d'un débit de codage ou de modulation du paquet, d'un débit de codage d'un en-tête du paquet, et d'une qualité du dispositif de transmission (12) et/ou du dispositif de réception (10) ; détermine une structure de paquet d'après l'état de canal radio déterminé, le débit de codage ou de modulation déterminé du paquet, le débit de codage déterminé de l'en-tête du paquet, et/ou la qualité déterminée du dispositif de transmission (12) et/ou du dispositif de réception (10) ; et transmet des données avec la structure de paquet déterminée, au dispositif de réception (10).
PCT/SE2015/050152 2014-07-09 2015-02-10 Dispositif de transmission, dispositif de réception, et procédés correspondants WO2016007060A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2991885A CA2991885A1 (fr) 2014-07-09 2015-02-10 Dispositif de transmission, dispositif de reception, et procedes correspondants

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201462022349P 2014-07-09 2014-07-09
US62/022,349 2014-07-09

Publications (1)

Publication Number Publication Date
WO2016007060A1 true WO2016007060A1 (fr) 2016-01-14

Family

ID=52684626

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2015/050152 WO2016007060A1 (fr) 2014-07-09 2015-02-10 Dispositif de transmission, dispositif de réception, et procédés correspondants

Country Status (2)

Country Link
CA (1) CA2991885A1 (fr)
WO (1) WO2016007060A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021069027A (ja) * 2019-10-24 2021-04-30 三菱重工業株式会社 データ通信機器、移動体、データ通信システム、受信信号の補正方法及び受信信号補正の学習方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050220208A1 (en) * 2004-03-31 2005-10-06 Tsuguhide Aoki Wireless transmitting device and wireless receiving device
EP1953977A1 (fr) * 2005-10-31 2008-08-06 NTT DoCoMo, Inc. Appareil et procede de definition des parametres d'emission du canal ascendant
US20100278114A1 (en) * 2006-09-11 2010-11-04 Yeong Hyeon Kwon Method for transmitting and receiving signals based on segmented access scheme and method for allocating sequence for the same
EP2621134A2 (fr) * 2012-03-06 2013-07-31 Huawei Technologies Co., Ltd. Procédé destiné à l'émission et à la réception de paquets de trafic, dispositif et système

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050220208A1 (en) * 2004-03-31 2005-10-06 Tsuguhide Aoki Wireless transmitting device and wireless receiving device
EP1953977A1 (fr) * 2005-10-31 2008-08-06 NTT DoCoMo, Inc. Appareil et procede de definition des parametres d'emission du canal ascendant
US20100278114A1 (en) * 2006-09-11 2010-11-04 Yeong Hyeon Kwon Method for transmitting and receiving signals based on segmented access scheme and method for allocating sequence for the same
EP2621134A2 (fr) * 2012-03-06 2013-07-31 Huawei Technologies Co., Ltd. Procédé destiné à l'émission et à la réception de paquets de trafic, dispositif et système

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021069027A (ja) * 2019-10-24 2021-04-30 三菱重工業株式会社 データ通信機器、移動体、データ通信システム、受信信号の補正方法及び受信信号補正の学習方法
JP7308124B2 (ja) 2019-10-24 2023-07-13 三菱重工業株式会社 データ通信機器、移動体、データ通信システム、受信信号の補正方法及び受信信号補正の学習方法

Also Published As

Publication number Publication date
CA2991885A1 (fr) 2016-01-14

Similar Documents

Publication Publication Date Title
US11483881B2 (en) Techniques for NR cell/beam identification
CN115136513B (zh) 非地面网络中的上行链路频率和定时补偿
EP3520508B1 (fr) Procédés et appareils destinés à la coexistence d'une nouvelle technologie radio 5g avec une technologie de l'internet des objets à bande étroite
EP3281339B1 (fr) Procédés de transmission adaptative pour des informations de commande de liaison montante
CN113228767A (zh) 用于确定用于免授权通信的配置简档的方法和系统
US20160094996A1 (en) System and method of handling uplink transmission collision for enhanced coverage mode ues
CN114830568B (zh) 用于物理上行链路共享信道重复适配的系统和方法
US20170150492A1 (en) Wireless communication system, access point, and wireless device
US11785629B2 (en) Method and apparatus for transmitting and receiving data
US12133224B2 (en) Network node, UE and methods performed therein for handling communication
CN110463100B (zh) 用于在物理广播信道有效载荷中传达同步信号块索引的技术
CN112425188A (zh) 使用网络编码来中继交通工具通信
CN114629613A (zh) 调度uci传输方案
EP3687258B1 (fr) Évitement de collision avec transmission synchronisée
US10298352B2 (en) Radio single symbol design via frequency division multiplexing of reference signals and data tones
CN115004777A (zh) 侧行链路波束失败检测
WO2020068821A1 (fr) Techniques dans un rapport de mesure de la défaillance du groupe de cellules secondaires
US8924807B2 (en) Method and apparatus for acknowledgement using a group identifier
EP3925106B1 (fr) Technique de transmission multicouche
US10505617B2 (en) First and second radio nodes and methods therein, for performing a radio communication
WO2021120144A1 (fr) Commande de transmission de signal de découverte entre équipements utilisateur
WO2016007060A1 (fr) Dispositif de transmission, dispositif de réception, et procédés correspondants
US11923874B2 (en) Codebook compression with lossy encoding for low probability events
KR20220160101A (ko) 정보 송신 방법, 정보 수신 방법, 및 관련된 장치 및 디바이스
US20130170430A1 (en) Method and apparatus for acknowledgement including a group identifier

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: 15710282

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: 15710282

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2991885

Country of ref document: CA