Ultra lean random access for wireless devices

Abstract

Embodiments of the present disclosure provide a method, a user equipment, UE, a network node, and a computer program product for performing random access, in a wireless communication network (100). The method is performed in a wireless device (102) in the wireless communication network (100). The method comprises transmitting (304) a message to a network node (104) in the wireless communication network (100). The message comprising at least information indicating that a delayed response message or no response is expected from the network node (104) for the transmitted message. Further, the method comprises receiving (306) the delayed response message from the network node when the message comprising the information indicating a delayed response message is expected from the network node (104), wherein the delayed response message from the network node (104) is delayed by a timing indication indicated to the network node (104). Corresponding network node, wireless device, and computer program products are also disclosed.

Description

[0001] ULTRA LEAN RANDOM ACCESS FOR WIRELESS DEVICES

[0002] TECHNICAL FIELD

[0003] The present disclosure relates generally to the field of wireless communication. More particularly, it relates to methods, wireless device, network node and computer program products for performing random access in a wireless communication network.

[0004] BACKGROUND

[0005] A wireless communication system consists of a downLink, DL, supporting transmissions of signals from a base station to wireless devices, also referred as user equipments, UEs, and of an upLink, UL, supporting transmissions of signals from UEs to the base station. The base station i.e., a Node B is generally a fixed station and may also be referred to as a base transceiver system, BTS, an access point, or the like.

[0006] In recent years, wireless communication has been evolved from human-centric communications e.g., the communication using the UEs to include machine-type communication, MTC, (e.g., communication with sensing devices deployed in houses, streets, factories, and so on). This evolutions is being driven by numerous applications in the Internet of Things, loT, domain, making things "smarter" as in smart houses, smart cities, smart factories, and smart grids.

[0007] A typical loT device is powered by a small battery and features a low-complexity design with limited computational capabilities, low cost and infrequent data communications. A common characteristic of a large class of loT devices such as sensors, smart meters, and wearable devices is the limited power availability for communication, as compared to other types of traditional wireless devices like smart phones, tablets, or the like. Therefore, prolonging the device battery life has been a key design consideration for MTC.

[0008] Various technical solutions offered by the third generation partnership project, 3GPP, have been designed to cater to these characteristics of the loT devices. For example, narrow band loT, NB-loT, was introduced with the requirement of achieving a 10 years life operating on a 5 Wh battery. In order to meet these requirements, several power saving mechanisms were considered in the initial design and are later updated to further evolve the NB-loT. There also exists a new class of loT devices referred to as self-powered or zero-power, ZP, or zero-energy, ZE, devices, which are emerging. These ZP devices harvest energy from the ambient energy sources such as light, motion, RF signals, heat, or the like and are designed to have extremely low complexity, which further reduces the cost. However, these ZP devices have limitations in terms of power availability which also depends on environment. Furthermore, a ZP device may also have limited transceiver capabilities to enable ultra-low power operation because of the amount of power available. On the other hand, the energy requirements for wireless communications are typically higher, especially if an application requires communication ranges in the order of tens of meters or larger. Therefore, these devices need to accumulate sufficient energy in order to be able to operate.

[0009] For performing wireless communication, these devices need to acquire UL resources from the base station for transmitting data by performing a random access procedure using physical random access channel, PRACH. The PRACH is a specific set of time-frequency resources allocated by the base station for performing the random access procedure. If periodic scheduling request, SR, resources are not allocated by the base station, the random access is also used by the devices to acquire uplink resources for all subsequent data transmission. Thus, the devices perform RA for data transmission.

[0010] In new radio, NR, systems, the random-access procedure is based on a four step random access where the device transmits a request for the access by sending a randomly chosen preamble sequence as a Message 1, Msg 1. The base station responds with a randomaccess response, RAR, in Msg 2 providing a feedback for the access request. The device may identify the RAR by receiving a PDCCH addressed to the RA-RNTI which is determined by the time and frequency of the preamble transmission and the RAR contains the preamble id used by the wireless device. If there is a contention, i.e., more than one device used the same preamble, then there will be further contention resolution using Msg 3 and Msg 4 to complete the 4-step random access procedure.

[0011] In order to reduce latency and device's power consumption in performing the random access, a 2-step random access is specified in the NR systems. With the 2-step random access, a device transmits both Msg 1 and Msg 3 together without any feedback in between. The combined UL transmission is referred as Message A. The base station responds with both Msg 2 and Msg 4, with Msg B. The wireless device may identify the RAR by receiving a physical downlink control channel, PDCCH, addressed to the Msg B-RNTI which is also determined by the time and frequency of preamble transmission.

[0012] In some instances, early data transmission may performed during the random access in which the data transmission to and from the wireless device involves only a small transport block. It is possible to have an early data transmission during the random-access procedure. In the 4-step random access, early data transmission can be mobile-originated, MO or mobile-terminated, MT. For MO data transmission, the wireless device sends a specific preamble for early data transmission and the UL data transmission, up to 1000 bits may be transmitted as a part of Msg 3. Further, the wireless device may autonomously select between up to 4 different semi-statically transport block sizes. For MT data transmission, the wireless device may be paged with data transmission indication and the DL data transmission may be sent as part of Msg 4. In the 2-step random access, early data transmission may be performed by including UL data as a part of Msg A, while DL data transmission may be performed as a part of Msg B.

[0013] However, the existing random access procedure is designed for devices with a reliable and predictable source of energy. For self-powered devices such as machine-type devices and the ZP devices powered by energy harvesting as described above, the energy availability of these device may be scarce, intermittent and may be unpredictable.

[0014] SUMMARY

[0015] Consequently, there is a need for an improved method and arrangement for performing a random access in a wireless communication network that alleviates at least some of the above cited problems.

[0016] It is therefore an object of the present disclosure to provide a method, a wireless device, a network node, and a computer program product for performing a random access in a wireless communication networkthat seeks to mitigate, alleviate, or eliminate all or at least some of the above-discussed drawbacks of presently known solutions.

[0017] This and other objects are achieved by means of a method, a computer program product, and a device as defined in the appended claims. The term exemplary is in the present context to be understood as serving as an instance, example or illustration.

[0018] According to a first aspect of the present disclosure, a method for performing a random access in a wireless communication network is provided. The method is performed by a wireless device in the wireless communication network. The method comprises transmitting a message to a network node in the wireless communication network. The message comprising at least information indicating that a delayed response message or no response is expected from the network node for the transmitted message. The delayed response message from the network node is delayed by a timing indication indicated to the network node.

[0019] In some embodiments, the method further comprising determining that a random access procedure with a delayed response message or a no response is to be used.

[0020] In some embodiments, the step of determining that a random access procedure with a delayed response message or a no response from a network node is to be used comprises receiving a first indication from the network node that a random access procedure with a delayed response message or a no response from the network node is to be used. The first indication further indicates the wireless device to perform a random access with a delayed response message or a no response from the network node. In some embodiments, the first indication from the network node is received in one or more of a: a pre-determined synchronization signal block, SSB, a master information block, MIB, a wakeup signal, WUS and a paging message.

[0021] In some embodiments, the message further comprises at least one or more of: a random access preamble, data intended to the network node, an indication of power profile of the wireless device, the timing indication for the delayed response message, an identifier associated with the wireless device, an identifier of a relay node when the message is transmitted to the network node through the relay node, and capability information of the wireless device.

[0022] In some embodiments, the method further comprising receiving the delayed response message from the network node when the message comprising the information indicating a delayed response message is expected from the network node.

[0023] In some embodiments, the information indicating that a delayed response message or no response is expected from the network node comprises one or more of: a second indication, a bit indicator, and a flag.

[0024] In some embodiments, the second indication is transmitted in one or more of: a Radio Resource Control, RRC, message, a RRC message with a new cause value and a flag enabled in the message.

[0025] In some embodiments, the step of transmitting the message to the network node in the wireless communication network comprises selecting a random access preamble from a plurality of random access preambles configured for the wireless device. Further, the method comprises determining a physical uplink shared channel, PUSCH, resource from a plurality of PUSCH resources associated with the selected random access preamble and transmitting the message using the determined PUSCH resource.

[0026] In some embodiments, the timing indication for the delayed response message is determined based on one or more of the selected random access preamble, the indication of the power profile of the wireless device, transmission of the message in a pre-defined time - frequency resource slot, configured discontinuous reception, DRX, or enhanced DRX for the wireless device and one or more configured delay interval values for reception of the delayed response message.

[0027] In some embodiments, the timing indication indicates one of: a time duration with reference to a time instant of the transmission of the message, a pre-determined time - frequency resource slot, a frame number for which the delayed response message is transmitted from the network node.

[0028] In some embodiments, the message is transmitted to the network node through one or more relay nodes.

[0029] In some embodiments, the delayed response message is received from the network node through the one or more relay nodes.

[0030] In some embodiments, when the delayed response message is received from the network node through the one or more relay nodes, the timing indication of the delayed response message is determined based on or more of the selected random access preamble, the indication of the power profile of the wireless device, transmission of the message in a predefined time - frequency resource slot, configured discontinuous reception, DRX, or enhanced DRX for the wireless device and number of hops between the one or more relay nodes to the wireless device.

[0031] In some embodiments, the delayed response message comprises one or more of information indicating acknowledgement of the data transmitted in the message, one or more quantized levels for success transmission rate of an uplink transmission, information indicating the wireless device to change one or more of: transmission parameters and resource assignments and information for selecting one or more relay nodes.

[0032] In some embodiments, the message is one of: a message A, MSG A, a message 1, MSG 1, a message 3, MSG 3, of the random access procedure.

[0033] In some embodiments, the delayed response message is one of: a message B, MSG B, a message 2, MSG 2 a message 4, MSG 4, of the random access procedure.

[0034] According to a second aspect of the present disclosure, a method for handling random access by a wireless device in a wireless communication network. The method performed by a network node, the method comprising receiving a message from the wireless device. The message comprising at least information indicating whether a delayed response message or no response is expected from the network node for the received message. The delayed response message from the network node (104) is delayed by a timing indication indicated to the network node (104).

[0035] In some embodiments, the method further comprising determining that a random access procedure with a delayed response message or a no response is to be used and upon the determination that the random access procedure with a delayed response message or no response from the network node is to be used, the method comprising transmitting a first indication to the wireless device, said indication indicating to wireless device to perform a random access.

[0036] In some embodiments, the first indication to the wireless device is transmitted in one or more of: a pre-determined synchronization signal block, SSB, a master information block, MIB, a wakeup signal, WUS and a paging message.

[0037] In some embodiments, the message further comprises at least one or more of: a random access preamble, data intended to the network node, an indication of power profile of the wireless device, a timing indication for the delayed response message, an identifier associated with the wireless device and capability information of the wireless device.

[0038] In some embodiments, the method further comprising transmitting the delayed response message from the network node when the message comprising the information indicating a delayed response message is expected from the network node.

[0039] In some embodiments, the information indicating that a delayed response message or no response is expected from the network node comprises one or more of: a second indication, a bit indictor, and a flag.

[0040] In some embodiments, the second indication is transmitted in one or more of: a Radio Resource Control, RRC, message and a RRC message with a new cause value and a flag enabled in the message.

[0041] In some embodiments, the timing indication of the delayed response message is determined based on one or more of the received random access preamble, indication of the power profile of the wireless device, reception of the message in a pre-defined time - frequency resource slot, configured discontinuous reception, DRX, or enhanced DRXfor the wireless device and one or more configured delay interval values for transmission of the delayed response message.

[0042] In some embodiments, the timing indication indicates one of: a time duration with reference to a time instant of the transmission of the message, a pre-determined time - frequency resource slot, a frame number for which the delayed response message is transmitted from the network node.

[0043] In some embodiments, the message is received at the network node through one or more relay nodes.

[0044] In some embodiments, when the delayed response message is transmitted to the wireless device through one or more relay nodes, timing of the delayed response message is based on or more of: the received random access preamble, the indication of the power profile of the wireless device, reception of the message in a pre-defined time - frequency resource slot, configured discontinuous reception, DRX, or enhanced DRX forthe wireless device and a number of hops between the one or more relay nodes to the wireless device.

[0045] In some embodiments, the delayed response message comprises one or more of: information indicating acknowledgement of the data transmitted in the message, one or more quantized levels for success transmission rate of an uplink transmission, information indicating the wireless device to change one or more of: transmission parameters and resource assignments and information for selecting one or more relay nodes.

[0046] In some embodiments, the message is one of: a message A, MSG A, a message 1, MSG 1, a message 3, a MSG 3 of the random access procedure.

[0047] In some embodiments, the delayed response message is one of: message B, MSG B, a message 2, MSG 2, a message 4, MSG 4 of the random access procedure.

[0048] According to a third aspect of the present disclosure, a wireless device for performing a random access in a wireless communication network is provided. The wireless device being adapted for transmitting a message to the network node in the wireless communication network. The message comprising at least information indicating that a delayed response message or no response is expected from the network node for the transmitted message. The delayed response message from the network node is delayed by a timing indication indicated to the network node.

[0049] According to a fourth aspect of the present disclosure, a network node for handling random access by a wireless device in a wireless communication network is provided. The network node being adapted for receiving a message from the wireless device. The message comprising at least information indicating whether a delayed response message or no response is expected from the network node for the received message. The delayed response message from the network node is delayed by a timing indication indicated to the network node.

[0050] According to a fifth aspect of the present disclosure, there is provided a computer program product comprising a non-transitory computer readable medium, having thereon a computer program comprising program instructions. The computer program is loadable into a data processing unit and configured to cause execution of the method according to any of the first and second aspects when the computer program is run by the data processing unit.

[0051] An advantage of some embodiments is that alternative and / or improved random access procedure is provided for wireless devices or low power devices referred as zero power devices.

[0052] An advantage of some embodiments is to allow the wireless devices to perform an ultralean random access for early data transmission to the network node.

[0053] An advantage of some embodiments is that the wireless device may perform data transmission during the random access without having to wait for an immediate feedback or a response message from the network node. Thus, the wireless device may not need to complete whole random-access procedure and to move to the RRC connected state.

[0054] An advantage of some embodiments is to conserve energy of the wireless devices by allowing the wireless device to transmit uplink, UL, data whenever there is data and then to enter sleep mode immediately for UL transmission. An advantage of some embodiments is that the wireless device may receive response message corresponding to the UL data transmission at a later time instance when the wireless device is in a suitable state to receive the response message e.g., when there is sufficient energy available at the wireless device.

[0055] BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The foregoing will be apparent from the following more particular description of the example embodiments, as illustrated in the accompanying drawings in which like reference characters refer to the same parts throughout the different views. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the example embodiments.

[0057] Figures 1A - 1C disclose an example wireless communication network according to some embodiments;

[0058] Figure 2 is an example schematic diagrams showing allocation of resources for wireless device(s) according to some embodiments;

[0059] Figure 3 is a flow chart illustrating example method steps for performing a random access in a wireless communication network according to some embodiments;

[0060] Figure 4 is a signalling diagram illustrating example signaling according to some embodiments;

[0061] Figure 5 is a flowchart illustrating example method steps performed by a network node for handling random access by the wireless device according to some embodiments;

[0062] Figure 6 is an example schematic diagram showing functional modules of the wireless device according to some embodiments;

[0063] Figure 7 is an example schematic diagram showing functional modules of the network node according to some embodiments; and

[0064] Figure 8 discloses an example computing environment according to some embodiments. DETAILED DESCRIPTION

[0065] Aspects of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. The apparatus and method disclosed herein can, however, be realized in many different forms and should not be construed as being limited to the aspects set forth herein. Like numbers in the drawings refer to like elements throughout.

[0066] The terminology used herein is for the purpose of describing particular aspects of the disclosure only, and is not intended to limit the invention. It should be emphasized that the term "comprises / comprising" when used in this specification is taken to specify the presence of stated features, integers, steps, or components, but does not preclude the presence or addition of one or more other features, integers, steps, components, or groups thereof. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0067] Embodiments of the present disclosure will be described and exemplified more fully hereinafter with reference to the accompanying drawings. The solutions disclosed herein can, however, be realized in many different forms and should not be construed as being limited to the embodiments set forth herein.

[0068] It will be appreciated that when the present disclosure is described in terms of a method, it may also be embodied in one or more processors and one or more memories coupled to the one or more processors, wherein the one or more memories store one or more programs that perform the steps, services and functions disclosed herein when executed by the one or more processors.

[0069] In the present disclosure, wireless devices, also known as mobile terminals, and / or wireless terminals or low power devices or zero power devices are enabled to communicate wirelessly with a network node in a wireless communication network.

[0070] Typically, a network node may serve or cover one or several cells of the wireless communication network. That is, the network node provides radio coverage in the cell(s) and communicates over an air interface with the UE(s) operating on radio frequencies within its range. The network node may be also referred to as "eNB", "eNodeB", "NodeB" or "gNB", depending on the technology and terminology used. In the present disclosure, the network node device may also be referred to as a base station, BS.

[0071] In the following description of exemplary embodiments, the same reference numerals denote the same or similar components.

[0072] FIGS. 1A- 1C disclose an example wireless communication network 100. As depicted in FIG. 1A, the wireless communication network 100 includes a wireless device 102 and a base station 104.

[0073] The base station 104 may be for example a new radio, NR, base station i.e., a gNB or an evolved node base station i.e., eNB, or the like. The wireless device 102 communicates with the base station 104 serving the wireless device 102. The communication from the base station 104 to the wireless device 102 is referred to as downlink, DL, communication, whereas communication from the wireless device 102 to the base station 104 is referred to as uplink, UL, communication. Thus, the wireless device 102 may involves in bidirectional radio communication with the base station 104.

[0074] There may be a plurality of wireless devices 102a-102n in the coverage of the base station 104 as depicted in FIG. IB. The plurality of wireless devices 102a-102n may belong to a group and the wireless devices 102a-102n in the group may be identified using a group ID.

[0075] The base station 104 comprises a scheduler for dynamically scheduling downlink transmissions and allocating uplink transmission resources among all the wireless devices 102a-102n communicating with the base station 104 as shown in FIG. IB. Each of the wireless devices 102a -102n acquires uplink, UL, resources from the base station for transmitting data by performing a random access, RA, procedure using the physical random access channel, PRACH. The PRACH is a specific set of time-frequency resources allocated by the base station for use by the wireless devices 102a - 102n in performing the RA procedure. If periodic scheduling request, SR, resources are not allocated to the wireless device 102 by the base station 104, the random access is also used by the wireless devices 102a - 102n to acquire uplink resources for all subsequent data transmission. In some implementations, the data may be transmitted to the base station 104 through one or more relay nodes 110a and 110b by performing the RA procedure as shown in FIG. 1C. For example, there may be any number of relay nodes between the wireless device 102 and the base station 104 for relaying the data from the wireless device 102 to the base station 104. In some examples, the relay nodes 110a and 110b may be, smart meters, MTC devices, Integrated Access and Backhaul, IAB, nodes, a helping node, another wireless device or zero power device, or the like.

[0076] Some examples of the wireless devices 102a - 102n may include internet of things, loT, devices, self-powered or zero-power, ZP, or zero-energy, ZE, devices. These self-powered or a zero-power devices are usually not powered by a battery. Instead, these devices harvest energy from the ambient energy sources such as light, motion, RF signals, heat, etc.

[0077] In order to reduce latency as well as power consumption of the wireless devices 102a - 102n for performing random access, a 2-step random access is specified in New Radio, NR, systems. With the 2-step random access, the wireless device 102 transmits both Msg 1 and Msg 3 together without any feedback in between. The combined UL transmission is called Message A. The base station 104 responds with both Msg 2 and Msg 4 together with Msg B. The wireless device 102 can identify the RAR by receiving a PDCCH addressed to the Msg B-RNTI which is also determined by the time and frequency of the preamble transmission.

[0078] In some instances, early data transmission may performed during the random access in which the data transmission to and from the wireless device involves only a small transport block, TB. It is possible to have an early data transmission during the random-access procedure. In the 4-step random access, early data transmission may be either mobile- originated, MO or mobile-terminated, MT.

[0079] However, the existing random access procedure is designed for devices with a reliable and predictable source of energy. For self-powered devices such as machine-type devices and the ZP devices powered by energy harvesting, the energy availability may be scarce, intermittent and may be unpredictable.

[0080] Therefore, according to some embodiments of the present disclosure, the wireless device 102 implements a method for performing ultra-lean random access for transmission of the data to the base station 104 as described herein. Alternatively, the base station 104 may implement the method for efficient handling of random access by the wireless device 102. For example, the base station 104 may receive a message from the wireless device 102 indicating whether a delayed response message or no response is expected from the network node for the random access by the wireless device 102. The delayed response message from the network node is delayed by a timing indication indicated to the network node.

[0081] According to some embodiments of the present disclosure, the wireless device 102 may determine that a random access procedure with a delayed response message or no response from the base station 104 is to be used. For example, the wireless device 102 may receive a first indication from the base station 104 which indicates the wireless device 102 to perform a random access procedure a delayed response message or no response from the base station 104. . The first indication may be received in a pre-determined synchronization signal block, SSB, a master information block, MIB, a wakeup signal, WUS and a paging message.

[0082] When the wireless device 102 determines that the random access procedure with either the delayed response message or no response from the base station 104 is to be used, the wireless device 102 performs random access procedure. The wireless device 102 may perform the random access for early data transmission by transmitting a message to the base station 104. For example, the message transmitted to the base station 104 may include at least information to the base station 104 indicating that the delayed response message or no response is expected from the base station 104 for the transmitted message.

[0083] In some examples, the message may also include information including a random access preamble, data intended to the base station 104, an indication of power profile of the wireless device 102, a timing indication for the base station 104 for transmitting the delayed response message, an identifier associated with the wireless device 102, an identifier of a relay node when the message is transmitted through the relay node 110a or 110b (as shown in FIG. 1C), and capability information of the wireless device 102.

[0084] Further, the wireless device 102 may receive the delayed response message from the base station 104 when the message transmitted to the base station 104 includes information indicating that the delayed response message is expected from the base station 104. For example, the wireless device 102 may receive the delayed response message from the base station 104 based on the timing indication for the delayed response message indicated to the base station 104 in the message.

[0085] In some examples, the information in the message transmitted to the base station 104 may include one or more of a second indication, a bit indicator and a flag for indicating to the base station 104 either the delayed response message or no response is expected from the base station. The second indication may be transmitted in a Radio Resource Control, RRC, message, or a RRC message with a new cause value or a flag enabled in the message.

[0086] Various embodiments related to transmission of the message to the base station 104 for the random access, the information in the message and reception of the delayed response message from the base station 104 are explained in the later parts of the disclosure.

[0087] Figure 2 is an example schematic diagram showing allocation of resources for wireless device(s). The wireless device acquires uplink, UL, resources from the base station for transmitting data by performing the RA, procedure using the physical random access channel, PRACH. The PRACH is a specific set of time-frequency resources allocated by the base station for use by the wireless device in performing the RA procedure as shown in the FIG. 2.

[0088] For example, the wireless device uses a UL resource grid 200 (as shown in FIG. 2) to transmit the data to the base station. The wireless device randomly selects a RA preamble from a set of configured RA preambles which are specific for the RA for early data transmission to the base station. The UL data (i.e., the message) is transmitted from the wireless device on a physical UL shared channel, PUSCH 235 using specific PUSCH resources. The specific PUSCH resources may be determined by the wireless device from mapping or association between the selected RA preamble and the PUSCH resources.

[0089] In some examples, for performing the RA with early UL data transmission, the wireless device randomly selects a phase rotation index or an orthogonal cover code from a set of configured phase rotations or orthogonal cover codes and the wireless device applies the selected phase rotation index or the orthogonal cover code to the randomly selected RA preamble.

[0090] In some examples, there may be multiple PUSCH resources associated with the selected RA preamble and when multiple PUSCH resources are associated with the selected RA preamble, the wireless device randomly selects a PUSCH resource from the multiple PUSCH resources and the wireless device uses the selected PUSCH resource for UL data transmission. The random selection of the PUSCH resource may help to reduce potential PUSCH collision when multiple wireless devices perform the RA with early data transmission with the same RA preamble. Additionally, random selection of the PUSCH resource may provide additional flexibility in allowing autonomous selection of transport block size, TBS, by the wireless device based on the selected PUSCH resource.

[0091] In some examples, the wireless device may performs UL data transmission only in a slot index and / or physical resource blocks, PRBs, that are assigned to the wireless device. The wireless device may be assigned a set of valid slots and / or PRBs to be used for UL data transmission for the RA with early UL data transmission.

[0092] As depicted in the FIG. 2, the UL data is transmitted in a UL resource grid 200 over a subframe 205 having a duration of 1 milli-second, ms. The subframe 205 contains fourteen SC-FDMA symbols. As depicted, the 1 ms subframe 205 includes two slots: A first slot 210 and a second slot 215 corresponding to slots 225 and 230 respectively as shown in FIG. 2. Each of the slots 210 and 215 contain seven SC-FDMA symbols, and each of the slots 210 and 215 have a duration of 0.5 ms. Further, the UL resource grid 200 includes a plurality of physical resource blocks, 220. Each physical resource block 220 contains a number of subcarriers.

[0093] By default, the wireless device transmits the UL data on normal uplink control channel (e.g., normal PUCCH 240) using a subframe of the legacy TTI subframe type (e.g., the 1 ms subframe 205). However, the wireless device transmits the UL data an uplink data channel (e.g., PUSCH) using a subframe if the base station allocates resources to the wireless device on the uplink data channel at the beginning of the subframe 205 (e.g., allocates PUSCH 235 during the first slot 225).

[0094] In some examples, the timing indication of the delayed response message to base station is based on the selected random access preamble and transmission of the message with UL data in a pre-defined time - frequency resource slot. The timing indication indicates one of: a time duration with reference to a time instant of the transmission of message, a predetermined time - frequency resource slot and a frame number for which the delayed response message is transmitted from the base station.

[0095] Figure 3 is a flowchart illustrating an example method 300 for performing random access in a wireless communication network. As stated above, the wireless device performs the method 300 for random access to the base station in the wireless communication network. The wireless device may represent a class of power-limited devices with typically intermittent and unreliable energy availability, also referred as zero-power devices. The method 300 involves various steps performed by the wireless device for random access and early data transmission where the wireless device shall not expect to receive an immediate response message or feedback from the base station in response to its random-access attempt. The response message may or may not arrive from the base station and the response message may be transmitted from the base station through a relay node, or another helping node.

[0096] Thus, the wireless device may either receive a delayed response message or no response from the base station for the transmitted message. The delayed response message from the base station is delayed by a timing indication indicated to the base station.

[0097] In response to the RA, the wireless device may receive a delayed response message after some time interval To after UL transmission (i.e., selected preamble and UL data) or the wireless device receives no response from the base station depending on a mode of operation of the wireless device. The mode of operation of the wireless device may include a RA procedure with a delayed response message or a RA procedure with no response from the base station. The mode of operation may be configured to the wireless device by the base station or the mode of operation may be indicated by the device to the base station. Therefore, the wireless device may receive a delayed response message or no response from the base station for the random access attempt with early data transmission.

[0098] At step 304, the method 300 comprises transmitting the message to the base station in the wireless communication network. For example, the message may be a message A, MSG A, MSG 1 or MSG 3 of the random access procedure. The message may include information indicating that a delayed response message or no response is expected from the base station for the transmitted message.

[0099] In some examples, the message may be transmitted by the wireless device 102 directly to the base station 04 as shown in FIG. 1A and in some implementations the message may be transmitted to the base station 104 through one or more relay nodes 110a and 110b as shown in FIG. 1C.

[0100] In some examples, the message may also include a random access, RA, preamble, data intended to the base station, an indication of power profile of the wireless device, a timing indication for the delayed response message, an identifier associated with the wireless device, an identifier of a relay node when the message is transmitted to the base station through the relay node, and capability information of the wireless device.

[0101] The wireless device randomly selects a RA preamble from a set of configured RA preambles which are specific for the RA for early data transmission to the base station. The UL data (i.e., the message) is transmitted from the wireless device on the PUSCH using specific PUSCH resources. The specific PUSCH resources may be determined by the wireless device from mapping or association between the selected RA preamble and the PUSCH resources. For example, there may be multiple PUSCH resources associated with the selected RA preamble and when multiple PUSCH resources are associated with the selected RA preamble, the wireless device randomly selects a PUSCH resource from the multiple PUSCH resources and the wireless device uses the selected PUSCH resource for UL data transmission. In some examples, the information in the message transmitted to the base station 104 may include one or more of a second indication, a bit indicator and a flag for indicating to the base station 104 either the delayed response message or no response is expected from the base station. The second indication may be transmitted in a Radio Resource Control, RRC, message, or a RRC message with a new cause value or a flag enabled in the message.

[0102] In some examples, the wireless device may determine that the RA procedure with the delayed response message or no response from the base station is to be used as illustrated by the optional step 301. For example, the wireless device may autonomously determine to use the RA procedure with the delayed response message or no response from the base station. In some examples, the wireless device may be pre-configured by the base station to use the RA procedure with the delayed response message or no response from the base station.

[0103] In another example, the wireless device may receive a first indication from the base station to use the RA procedure with the delayed response message or no response from the network node. The first indication may be received in a pre-determined synchronization signal block, SSB, a master information block, MIB, a wakeup signal, WUS and a paging message.

[0104] The first indication from the base station may indicate the wireless device to perform the RA procedure with the delayed response message or no response from the base station is to be used. When the wireless device receives the first indication, the wireless device may determine that the RA procedure with the delayed response message or no response from the base station is to be used.

[0105] At step 306, the method 300 comprises receiving the delayed response message from the network node when the message includes the information indicating a delayed response message is expected from the base station. For example, when the wireless device transmits the message to the base station with the information indicating that the delayed response message is expected from the base station, the wireless device receives the delayed response message from the base station. The delayed response message from the base station is delayed by a timing indication indicated to the base station. The delayed response message from the base station is received in a message B, MSG B, MSG 2 and MSG 4 of the RA procedure. The delayed response message may be received after a time interval To after transmitting the message to the base station.

[0106] In some examples, the wireless device may transmit the message with the timing indication to the base station for transmitting the delayed response message. The timing indication may indicate a time duration with reference to a time instant of the transmission of message in a pre-determined time - frequency resource slot or a frame number for which the delayed response message is transmitted from the base station. For example, the timing indication to the base station for the delayed response message may be indicated based on a selected random access preamble by the wireless device. In another example, the timing indication to the base station for the delayed response message may be indicated based on indication of the power profile of the wireless device, transmission of the message on a pre-defined time - frequency resource slot, configured discontinuous reception, DRX or enhanced DRX for the wireless device and one or more configured delay interval values for reception of the delayed response message.

[0107] In some examples, the wireless device may not be able to receive the delayed response message at a specified time interval. In such case, the delayed response message may be retransmitted to the wireless device. For example, if there is no response from the wireless device, i.e., if the wireless device is configured with DRX or eDRX, and the wireless device may not be able to receive the delayed response message during the early data transmission, the delayed response message may be retransmitted in subsequent DRX occasion and thus, the wireless device may receive the delayed response message subsequent DRX occasion.

[0108] In some examples, the delayed response message to the wireless device may be delayed by the base station for a pre-defined time duration or for a maximum time duration. The time duration for delaying the response message may be configured by the base station or may depend wireless device's DRX configuration.

[0109] There may also be a DRX for reception of the delayed response message during which the delay response message may not be transmitted by the base station. The DRX for reception of the delayed response message may allow the wireless device to conserve energy and may reduce decoding at the device and also to avoid unnecessary transmission of the delayed response message from the base station.

[0110] In some examples, when the wireless device transmits the message to the base station through one or more relay nodes as shown in FIG. 1C, then the delayed response message from the base station may be received through the one or more relay nodes. When the delayed response message is received through the one or more relay nodes, the timing of the delayed response message may be indicated to the base station orthe timing indication of the delayed response message may be determined based on the selected random access preamble, the indication of the power profile of the wireless device, transmission of the message in a pre-defined time - frequency resource slot, configured discontinuous reception, DRX, or enhanced DRX for the wireless device and number of hops between the one or more relay nodes to the wireless device.

[0111] Further, the delayed response message may include one or more of: information indicating acknowledgement of the data transmitted in the message, one or more quantized levels for success transmission rate of an uplink transmission, information indicating the wireless device to change transmission parameters and resource assignments and information for selecting one or more relay nodes.

[0112] In some examples, the wireless device may not receive response message from the base station when the message transmitted to the base station indicates that no response is expected from the base station for the transmitted message. When the wireless device does not receive response message from the base station in response to the UL transmission, the random-access procedure with early data transmission is completed with the ULtransmission from the wireless device. In the above scenario, when compared to the existing 2-step RA procedure with early data transmission, if there is no response from the base station for the transmitted message, it may be considered that the MSG B of the existing 2-step RACH with early data transmission is omitted.

[0113] Figure 4 is a signalling diagram illustrating example signaling according to some embodiments. As depicted in FIG. 4, the wireless device 102 may determine 402 that the RA procedure with the delayed response message or no response from the base station 104 is to be used. For example, the wireless device 102 may autonomously determine that the RA procedure with the delayed response message or no response from the base station 104 is to be used. In another example, the wireless device 102 may receive the first indication from the base station 104 that the RA procedure with the delayed response message or no response from the network node is to be used. When the wireless device 102 determines to use the RA with the delayed response message or no response from the base station 104, the wireless device 102 may transmit 404 the message to the base station 104. The message may be a MSG A, a MSG 1 or a MSG 3 of the RA procedure. The message to the base station 104 may include information indicating that the delayed response message or no response is expected from the base station 104. The message may also include a random access preamble, data intended to the base station 104, an indication of power profile of the wireless device 102, a timing indication for the delayed response message, an identifier associated with the wireless device 102, and capability information of the wireless device 102.

[0114] For example, the information indicating that the delayed response message is expected from the base station 104, may be transmitted as a second indication, a bit indicator or a flag in the message.

[0115] The base station 104 receives the message from the wireless device 102 and the base station 104 may identify the second indication or the bit indicator or the flag in the message to determine that the delayed response message or no response is to be transmitted to the wireless device 102. If the base station 104 determines 406 that the delayed response message is to be transmitted to the wireless device 102 based on the second indication or the bit indicator or the flag in the message, the base station 102 transmits 408 the delayed response message to the wireless device 102. For example, the delayed response message may be transmitted to the wireless device 102 after a time interval To after reception of the message from the wireless device 102. In another example, the delayed response message may be transmitted to the wireless device 102 based on the timing indication in the message transmitted to the base station.

[0116] In some examples, the timing indication for transmitting the delayed response message may be determined by the base station 104 based on the selected random access preamble, indicated power profile of the wireless device 102, the time - frequency resource slot used for transmitting the message by the wireless device 102, configured DRX or enhanced DRX for the wireless device 102 and the configured delay interval values for the wireless device 102 for reception of the delayed response message.

[0117] Figure 5 is a flowchart illustrating example method steps performed by a network node for handling random access by the wireless device. The base station performs the method 500 for handling random access by the wireless device.

[0118] At step 504, the method 500 comprises receiving the message from the wireless device. For example, the message received from the wireless device may be MSG A, MSG 1 or the MSG 3 of the random access procedure. The message may include at least information indicating that a delayed response message or no response is expected from the base station. For example, the information indicating that the delayed response message or no response is expected from the base station may be received in the message in the form of a second indication or a bit indicator or a flag or the like.

[0119] In some examples, the second indication may be transmitted in a RRC message or a RRC message with a new cause value or a flag enabled in the message.

[0120] In some examples, the message may be received directly by the base station 104 from the wireless device 102 as shown in FIG. 1A. In some examples, the message may be received through one or more relay nodes 110a or 110b as shown in FIG. 1C.

[0121] Further, the message may also include a random access preamble, data intended to the base station, an indication of power profile of the wireless device, a timing indication for the delayed response message, an identifier associated with the wireless device and the capability information of the wireless device.

[0122] In some examples, the base station may determine that the wireless device need to use the RA procedure with the delayed response message or no response as illustrated by the optional step 501. For example, the base station may determine that the wireless device needs to use the RA procedure with the delayed response message or no response based on the type of the wireless device, i.e., when the wireless device is a zero power device or when the wireless device is low power MTC device or a smart meter or the like. In another example, the wireless device may have transmitted the capability information of the wireless device to the base station and the base station may determine that the wireless device needs to use the RA procedure with the delayed response message or no response based on capability of the wireless device to support the RA procedure with the delayed response message or no response, from the base station.

[0123] In another example, the base station may determine that the wireless device needs to use the RA procedure with the delayed response message or no response, based on the indication of the power profile received from the wireless device in the message received from the wireless device.

[0124] In yet another example, the base station may determine that the wireless device needs to use the RA procedure with the delayed response message or no response, based on location of the wireless device from the base station. For example, if the wireless device is located away from the coverage of the base station or if the wireless device is experiencing low signal strength from the base station, then the base station may determine that the wireless device needs to use the RA procedure with the delayed response message or no response.

[0125] When the base station determines that the wireless device needs to use the RA procedure with the delayed response message or no response, the base station may transmit a first indication to the wireless device as illustrated by the option step 502. The first indication may indicate the wireless device to perform the random access.

[0126] For example, the first indication to the wireless device may be transmitted in a predetermined synchronization signal block, SSB, a MIB, a WUS, a paging message or the like.

[0127] At step 506, the method 500 comprises transmitting the delayed response message to the wireless device. The delayed response message may be transmitted when the received message from the wireless device indicates that the delay response message is expected from the base station. For example, the delayed response message may be MSG B, MSG 2, or MSG 4 of the random access procedure. The delayed response message from the base station is delayed by a timing indication indicated to the network node. The delayed response message may be transmitted after a pre-determined time interval after reception of the message from the wireless device at step 504. The delayed response message may include information indicating acknowledgement of the data received in the message.

[0128] Further, the delayed response message may also include one or more quantized levels for success transmission rate of an uplink transmission, information indicating the wireless device to change one or more of: transmission parameters and resource assignments, information for selecting one or more relay nodes.

[0129] In some examples, the delayed response message may be transmitted based on the timing indication indicated in the message received from the wireless device. For example, the timing indication indicates a time duration with reference to a time instant of the reception of the message from the wireless device.

[0130] In some examples, the base station may determine the timing of the delayed response message based on the received random access preamble, the power profile of the wireless device indicated by the wireless device, reception of the message (at step 504) in a predefined time - frequency resource slot, configured DRX or enhanced DRX for the wireless device and configured delay interval values for transmission of the delayed response message.

[0131] The delayed response message is transmitted directly to the wireless device 102 as shown in FIG. 1A. In case when the message is received through relay nodes 110a or 110b as shown in FIG. 1C, the delayed response message is transmitted to the wireless device 102 through the relay nodes 110a or 110b. In such case, the timing of the delayed response message may be based on a number of hops between the relay nodes to the wireless device 102.

[0132] Figure 6 is an example schematic diagram showing functional modules of a wireless device for performing the random access. The wireless device of the wireless communication network is capable of performing the random access procedure with the delayed response message or no response expected from the base station.

[0133] According to at least some embodiments of the present invention, the wireless device 102 in FIG. 6 comprises a determiner 602, a processor 604, and a transceiving unit 608. In addition, the wireless device 102 may also comprise a control unit 606, adapted to control said units. It can be mentioned that the determiner 602 may be merged into the processor 604, which may be called a data processing unit, potentially also covering the control unit 606.

[0134] The determiner 602, and the transceiver 608 as well as the control unit 606, may be operatively connected to each other.

[0135] The function of the determiner 602, when encompassed by the processing unit, may be performed by determining means of the processing unit.

[0136] The transceiving unit 608 may be adapted to receive the first indication from the base station in a synchronization signal block, SSB, master information block, MIB, a wakeup signal, WUS and a paging message to perform the random access procedure with the delayed response message or no response from the base station.

[0137] Optionally, the determiner 602 may be adapted to determine that wireless device 102 need to use the random access procedure with the delayed response message or no response. The transceiving unit 608 may be adapted to transmit the message to the base station with the information indicating that the delayed response message or no response is expected from the base station for the transmitted message.

[0138] The transceiving unit 608 may be adapted to receive the delayed response message from the base station when the message comprising the information indicating a delayed response message is expected from the base station.

[0139] Figure 7 is an example schematic diagram showing functional modules of the network node for handling random access by the wireless device. The network node in the form of a base station of a wireless communication network is capable of configuring the one or more wireless devices to perform the random access procedure with the delayed response message or no response from the base station. The base station 104 may comprise means arranged to perform the method 500 for handling random access by the wireless device.

[0140] According to at least some embodiments of the present disclosure, the base station 104 as illustrated in FIG. 7 may comprise a scheduler 702, a processor 704, and a transceiver 708. In addition, the base station 104 may also comprise a control unit 706, adapted to control said units. The scheduler 702 may be adapted to allocate the one or more resources which may be a UL grant for the wireless device for transmitting the message comprising the data intended to the base station 104. The resources may be PUCCH resources, PUSCH resources or a combination of PUCCH resources and PUSCH resources.

[0141] The processor 704 which may be considered as a data processing unit, may be adapted to generate an indication, for example, in a DCI message, for indicating the allocated UCI resources.

[0142] The transceiver 708 may be adapted to receive the message comprising the information indicating whether a delayed response message or no response is expected from the base station 104 for the received message, corresponding to the step 504 of FIG. 5.

[0143] Further, the transceiving unit 708 may be adapted to transmit the first indication indicating to the wireless device to perform the random access with delayed response message or no response from the base station. The transceiver 708 may be adapted to transmit the delayed response message to the wireless device when the message received from the wireless device comprises the information indicating that the delayed response message is expected from the base station, corresponding to the step 506 of FIG. 5.

[0144] The scheduling unit 702, and the transceiving unit 708 may be operatively connected to each other enabling the function of each of the units.

[0145] The scheduling unit 702 may be comprised in one processing unit, which additionally also may comprise the control unit 706. The function of the scheduling unit 702 may in this case be performed by scheduling means of a data processing unit.

[0146] Figure 8 illustrates an example computing environment 800 implementing a method and the network node and the UE for resource allocation for transmission of UCI as described in FIG. 3 and FIG. 5. As depicted in FIG. 8, the computing environment 800 comprises at least one data processing unit 806 that is equipped with a control unit 802 and an Arithmetic Logic Unit, ALU 804, a memory 812, a storage 814, plurality of networking devices 808 and a plurality Input output, I / O devices 810. The data processing unit 806 is responsible for processing the instructions of the algorithm. For example, the data processing unit 806 is equivalent to the processor of the network node. The data processing unit 806 is capable of executing software instructions stored in memory 812. The data processing unit 806 receives commands from the control unit 802 in order to perform its processing. Further, any logical and arithmetic operations involved in the execution of the instructions are computed with the help of the ALU 804.

[0147] The computer program is loadable into the data processing unit 806, which may, for example, be comprised in an electronic apparatus (such as a wireless device or a network node). When loaded into the data processing unit 806, the computer program may be stored in the memory 812 associated with or comprised in the data processor. According to some embodiments, the computer program may, when loaded into and run by the data processing unit 806, cause execution of method steps according to, for example, any of the methods illustrated in FIGS. 3 and 5 or otherwise described herein

[0148] The overall computing environment 800 may be composed of multiple homogeneous and / or heterogeneous cores, multiple CPUs of different kinds, special media and other accelerators. The data processing unit 806 is responsible for processing the instructions of the algorithm. Further, the plurality of data processing units 806 may be located on a single chip or over multiple chips.

[0149] The algorithm comprising of instructions and codes required for the implementation are stored in either the memory 812 or the storage 814 or both. At the time of execution, the instructions may be fetched from the corresponding memory 812 and / or storage 814, and executed by the data processing unit 806.

[0150] In case of any hardware implementations various networking devices 808 or external I / O devices 810 may be connected to the computing environment to support the implementation through the networking devices 808 and the I / O devices 810.

[0151] The embodiments disclosed herein can be implemented through at least one software program running on at least one hardware device and performing network management functions to control the elements. The elements shown in FIG. 8 include blocks which can be at least one of a hardware device, or a combination of hardware device and software module. The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and / or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the scope of the disclosure.

Claims

CLAIMS1. A method (300) in a wireless device (102) for performing a random access in a wireless communication network (100), wherein the method (300) comprises:- transmitting (304) a message to a network node (104) in the wireless communication network (100), said message comprising at least information indicating that a delayed response message or no response is expected from the network node (104) for the transmitted message, wherein the delayed response message from the network node (104) is delayed by a timing indication indicated to the network node (104).

2. The method according to claim 1, further comprising:- determining (302) that a random access procedure with a delayed response message or a no response from a network node (104) is to be used.

3. The method according to claim 2, wherein the step of determining that a random access procedure with a delayed response message or a no response from a network node (104) is to be used comprises:- receiving a first indication from the network node (104) that a random access procedure with a delayed response message or a no response from the network node (104) is to be used, wherein the first indication further indicates the wireless device (102) to perform a random access with a delayed response message or no response from the network node (104).

4. The method according to claim 3, wherein the first indication from the network node (104) is received in one or more of: a pre-determined synchronization signal block, SSB, a master information block, MIB, a wakeup signal, WUS and a paging message.

5. The method according to any of the preceding claims, wherein the message further comprises at least one or more of: a random access preamble, data intended to the network node (104), an indication of power profile of the wireless device (102), the timing indication for the delayed response message, an identifier associated with the wireless device (102), an identifier of a relay node when the message is transmitted to the network node (104) through the relay node, and capability information of the wireless device (102).

6. The method according to any of the preceding claims, further comprising:- receiving (306) the delayed response message from the network node when the message comprising the information indicating a delayed response message is expected from the network node (104).

7. The method according to any of the preceding claims, wherein the information indicating that a delayed response message or no response is expected from the network node comprises one or more of: a second indication, a bit indicator, and a flag.

8. The method according to claim 7, wherein the second indication is transmitted in one or more of: a Radio Resource Control, RRC, message, a RRC message with a new cause value and a flag enabled in the message.

9. The method according to any of the preceding claims, wherein the step of transmitting the message to the network node (104) in the wireless communication network (100) comprises:- selecting a random access preamble from a plurality of random access preambles configured for the wireless device (102);- determining a physical uplink shared channel, PUSCH, resource from a plurality of PUSCH resources associated with the selected random access preamble; and- transmitting the message using the determined PUSCH resource.

10. The method according to any of the preceding claims, wherein the timing indication for the delayed response message is determined based on one or more of:- the selected random access preamble,- the indication of the power profile of the wireless device (102),- transmission of the message in a pre-defined time - frequency resource slot,- configured discontinuous reception, DRX, or enhanced DRX for the wireless device, and- one or more configured delay interval values for reception of the delayed response message.

11. The method according to claim 10, wherein the timing indication indicates one of: a time duration with reference to a time instant of the transmission of the message, apre-determined time - frequency resource slot, a frame number for which the delayed response message is transmitted from the network node (104).

12. The method according to any of the preceding claims, wherein the message is transmitted to the network node (104) through one or more relay nodes.

13. The method according to any of the preceding claims, wherein the delayed response message is received from the network node (104) through the one or more relay nodes.

14. The method according to claim 13, wherein when the delayed response message is received from the network node (104) through the one or more relay nodes, the timing indication of the delayed response message is determined based on or more of:- the selected random access preamble,- the indication of the power profile of the wireless device (102),- transmission of the message in a pre-defined time - frequency resource slot,- configured discontinuous reception, DRX, or enhanced DRX for the wireless device, and- number of hops between the one or more relay nodes to the wireless device (102).

15. The method according to any of the preceding claims, wherein the delayed response message comprises one or more of:- information indicating acknowledgement of the data transmitted in the message,- one or more quantized levels for success transmission rate of an uplink transmission,- information indicating the wireless device to change one or more of: transmission parameters and resource assignments, and- information for selecting one or more relay nodes.

16. The method according to any of the preceding claims, wherein the message is one of: a message A, MSG A, a message 1, MSG 1, a message 3, MSG 3, of the random access procedure.The method according to any of the preceding claims, wherein the delayed response message is one of: a message B, MSG B, a message 2, MSG 2 a message 4, MSG 4, of the random access procedure. A method (500) performed by a network node (104) for handling random access by a wireless device (102) in a wireless communication network (100), wherein the method (500) comprises: receiving (504) a message from the wireless device (102), said message comprising at least information indicating whether a delayed response message or no response is expected from the network node (104) for the received message, wherein the delayed response message from the network node (104) is delayed by a timing indication indicated to the network node (104). The method according to claim 18, further comprising: determining (501) that a random access procedure with a delayed response message or no response from the network node (104) is to be used, upon the determination that the random access procedure with a delayed response message or a no response from the network node (104) is to be used, transmitting (502) a first indication to the wireless device (102), said indication indicating to wireless device (102) to perform a random access. The method according to claim 19, wherein the first indication to the wireless device (102) is transmitted in one or more of: a pre-determined synchronization signal block, SSB, a master information block, MIB, a wakeup signal, WUS and a paging message. The method according to any of the claims 18 - 20, wherein the message further comprises at least one or more of: a random access preamble, data intended to the network node (104), an indication of power profile of the wireless device (102), the timing indication for the delayed response message, an identifier associated with the wireless device (102) and capability information of the wireless device (102). The method according to any of the claims 18 - 21, further comprising: transmitting (506) the delayed response message to the wireless device (102) when the message comprising the information indicating a delayed response message is expected from the network node (104).

23. The method according to any of the claims, 18 - 22, wherein the information indicating that a delayed response message or no response is expected from the network node comprises one or more of: a second indication, a bit indictor, and a flag.

24. The method according to claim 23, wherein the second indication is transmitted in one or more of: a Radio Resource Control, RRC, message and a RRC message with a new cause value and a flag enabled in the message.

25. The method according to any of the preceding claims 18 - 24, wherein the timing indication of the delayed response message is determined based on one or more of:- the received random access preamble,- indication of the power profile of the wireless device,- reception of the message in a pre-defined time - frequency resource slot,- configured discontinuous reception, DRX, or enhanced DRX for the wireless device, and- one or more configured delay interval values for transmission of the delayed response message.

26. The method according to claim 25, wherein the timing indication indicates one of: a time duration with reference to a time instant of the transmission of the message, a pre-determined time - frequency resource slot, a frame number for which the delayed response message is transmitted from the network node (104).

27. The method according to any of the preceding claims 18 - 26, wherein the message is received at the network node (104) through one or more relay nodes.

28. The method according to any of the preceding claims 18 - T1 , wherein the delayed response message is transmitted to the wireless device (102) through one or more relay nodes.

29. The method according to claim 28, wherein when the delayed response message is transmitted to the wireless device (102) through one or more relay nodes, timing of the delayed response message is based on or more of:- the received random access preamble,- the indication of the power profile of the wireless device (102),- reception of the message in a pre-defined time - frequency resource slot,- configured discontinuous reception, DRX, or enhanced DRX for the wireless device (102), and- a number of hops between the one or more relay nodes to the wireless device (102).

30. The method according to any of the preceding claims 18 - 29, wherein the delayed response message comprises one or more of:- information indicating acknowledgement of the data received in the message,- one or more quantized levels for success transmission rate of an uplink transmission,- information indicating the wireless device to change one or more of: transmission parameters and resource assignments, and- information for selecting one or more relay nodes.

31. The method according to any of the claims 18 - 30, wherein the message is one of: a message A, MSG A, a message 1, MSG 1, a message 3, a MSG 3 of the random access procedure.

32. The method according to any of the claims 18 - 31, wherein the delayed response message is one of: message B, MSG B, a message 2, MSG 2, a message 4, MSG 4 of the random access procedure.

33. A wireless device (102) for performing a random access in a wireless communication network (100), the wireless device (102) being adapted for:- transmitting (304) a message to the network node (104) in the wireless communication network (100), said message comprising at least information indicating that a delayed response message or no response is expected from the network node (104) for the transmitted message, wherein the delayed response message from the network node (104) is delayed by a timing indication indicated to the network node (104).

34. The wireless device (102) according to claim 33, the wireless device (102) being further adapted for:- determining (302) that a random access procedure with a delayed response message or a no response from a network node (104) is to be used; and35. The wireless device (102) according to claim 34, wherein the wireless device (102) being adapted for determining that a random access procedure with a delayed response message or no response from a network node (104) is to be used by: receiving a first indication from the network node (104) that a random access procedure with a delayed response message or no response from the network node (104) is to be used, wherein the first indication further indicates the wireless device (102) to perform a random access with a delayed response message or a no response from the network node (104).

36. The wireless device (102) according to claim 35, wherein the first indication from the network node (104) is received in one or more of : a pre-determined synchronization signal block, SSB, a master information block, MIB, a wakeup signal, WUS and a paging message.

37. The wireless device (102) according to any of the claims, 33 - 36, wherein the message further comprises at least one or more of: a random access preamble, data intended to the network node (104), an indication of power profile of the wireless device (102), the timing indication for the delayed response message, an identifier associated with the wireless device (102), an identifier of a relay node when the message is transmitted to the network node (104) through the relay node, and capability information of the wireless device (102).

38. The wireless device (102) according to any of the claims, 33 - 37, wherein the wireless device (102) being further adapted for:- receiving (306) the delayed response message from the network node when the message comprising the information indicating a delayed response message is expected from the network node (104).

39. The wireless device (102) according to any of the claims, 33 - 38, wherein the information comprises one or more of: a second indication, a bit indicator and a flag.

40. The wireless device (102) according to claim 39, wherein the wireless device (102) being adapted for transmitting the second indication in one or more of: a Radio Resource Control, RRC, message, a RRC message with a new cause value and a flag enabled in the message.

41. The wireless device (102) according to any of the claims, 33 - 40, wherein the wireless device (102) being adapted for transmitting the message to the network node (104) in the wireless communication network (100) by:- selecting a random access preamble from a plurality of random access preambles configured for the wireless device (102);- determining a physical uplink shared channel, PUSCH, resource from a plurality of PUSCH resources associated with the selected random access preamble; and- transmitting the message using the determined PUSCH resource.

42. The wireless device (102) according to any of the claims, 33 - 41, wherein the wireless device (102) being adapted for determining timing indication for the delayed response message based on one or more of:- the selected random access preamble,- the indication of the power profile of the wireless device (102),- transmission of the message in a pre-defined time - frequency resource slot,- configured discontinuous reception, DRX, or enhanced DRX for the wireless device, and- one or more configured delay interval values for reception of the delayed response message.

43. The wireless device (102) according to claim 42, wherein the timing indication indicates one of: a time duration with reference to a time instant of the transmission of message, a pre-determined time - frequency resource slot, a frame number for which the delayed response message is transmitted from the network node (104).

44. The wireless device (102) according to any of the claims 33 - 43, wherein the wireless device (102) being adapted for transmitting the message to the network node through one or more relay nodes.

45. The wireless device (102) according to any of the claims 33 - 44, wherein the wireless device (102) being adapted for receiving the delayed response message from the network node (104) through the one or more relay nodes.

46. The wireless device (102) according to claim 45, wherein the wireless device (102) being adapted for determining the timing of the delayed response message whenthe delayed response message is received from the network node (104) through the one or more relay nodes based on or more of:- the selected random access preamble,- the indication of the power profile of the wireless device (102),- transmission of the message in a pre-defined time - frequency resource slot,- configured discontinuous reception, DRX, or enhanced DRX for the wireless device, and- number of hops between the one or more relay nodes to the wireless device (102). The wireless device (102) according to any of the claims 33 -46, wherein the delayed response message comprises one or more of:- information indicating acknowledgement of the data transmitted in the message,- one or more quantized levels for success transmission rate of an uplink transmission,- information indicating the wireless device to change one or more of: transmission parameters and resource assignments, and- information for selecting one or more relay nodes. The wireless device (102) according to any of the claims 33 - 47, wherein the message is one of: a message A, MSG A, a message 1, MSG 1, a message 3, MSG 3, of the random access procedure. The wireless device (102) according to any of the claims 33 -48, wherein the delayed response message is one of: a message B, MSG B, a message 2, MSG 2 a message 4, MSG 4, of the random access procedure. A network node (104) for handling random access by a wireless device (102) in a wireless communication network (100), the network node (104) being adapted for: receiving (504) a message from the wireless device (102), said message comprising at least information indicating whether a delayed response message or no response is expected from the network node (104) for the received message, wherein the delayed response message from the network node (104) is delayed by a timing indication indicated to the network node (104).The network node (104) according to claim 50, wherein the network node (104) being adapted for further comprising: determining (501) that a random access procedure with a delayed response message or no response from a network node (104) is to be used; upon the determination that the random access procedure with a delayed response message or a no response from the network node (104) is to be used, transmitting (502) a first indication to the wireless device (102), said indication indicating to wireless device (102) to perform a random access. The network node (104) according to claim 51, wherein the network node (104) being adapted for transmitting the first indication to the wireless device (102) in one or more of: a pre-determined synchronization signal block, SSB, a master information block, MIB, a wakeup signal, WUS and a paging message. The network node (104) according to any of the claims 50 - 52, wherein the message further comprises at least one or more of: a random access preamble, data intended to the network node (104), an indication of power profile of the wireless device (102), the timing indication for the delayed response message, an identifier associated with the wireless device (102) and capability information of the wireless device (102). The network node (104) according to any of the claims 50 - 53, the network node (104) being further adapted for: transmitting (506) the delayed response message from the network node (104) when the message comprising the information indicating a delayed response message is expected from the network node (104). The network node (104) according to any of the claims 50 - 54, wherein the information comprises one or more of: a second indication, a bit indictor, and a flag. The network node (104) according to claim 55, wherein the network node (104) being adapted for transmitting the second indication in one or more of: a Radio Resource Control, RRC, message and a RRC message with a new cause value and a flag enabled in the message.4057. The network node (104) according to any of the claims 50 - 56, wherein the network node (104) being adapted for determining a timing of the delayed response message based on one or more of:- the received random access preamble,- indication of the power profile of the wireless device,- reception of the message in a pre-defined time - frequency resource slot,- configured discontinuous reception, DRX, or enhanced DRX for the wireless device, and- one or more configured delay interval values for transmission of the delayed response message.

58. The network node (104) according to claim 57, wherein the timing indication indicates one of: a time duration with reference to a time instant of the transmission of message, a pre-determined time - frequency resource slot, a frame number for which the delayed response message is transmitted from the network node (104).

59. The network node (104) according to any of the claims 50 - 58, wherein the network node (104) being adapted for receiving the message through one or more relay nodes.

60. The network node (104) according to any of the claims 50 - 59, wherein the network node (104) being adapted for transmitting the delayed response message to the wireless device (102) through one or more relay nodes.

61. The network node (104) according to claim 60, wherein the network node (104) being adapted for transmitting the delayed response message to the wireless device (102) through one or more relay nodes, wherein the network node (104) being adapted for determining timing of the delayed response message based on one or more of:- the received random access preamble,- the indication of the power profile of the wireless device (102),- reception of the message in a pre-defined time - frequency resource slot, and- configured discontinuous reception, DRX, or enhanced DRX for the wireless device (102), and41- a number of hops between the one or more relay nodes to the wireless device (102). The network node (104) according to any of the claims 50 - 61, wherein the delayed response message comprises one or more of:- information indicating acknowledgement of the data transmitted in the message,- one or more quantized levels for success transmission rate of an uplink transmission,- information indicating the wireless device to change one or more of: transmission parameters and resource assignments, and- information for selecting one or more relay nodes. The network node (104) according to any of the claims 50 - 62, wherein the message is one of: a message A, MSG A, a message 1, MSG 1, a message 3, a MSG 3 of the random access procedure. The network node (104) according to any of the claims 50 - 63, wherein the delayed response message is one of: message B, MSG B, a message 2, MSG 2, a message 4, MSG 4 of the random access procedure. A computer program product comprising a non-transitory computer readable medium, having thereon a computer program comprising program instructions. The computer program is loadable into a data processing unit and configured to cause execution of the method according to any of claims 1 through 32 when the computer program is run by the data processing unit.

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