Flexible initial access channel configuration

Abstract

This specification includes at least methods and apparatuses in which, according to exemplary embodiments of the invention, a user equipment determines to access a cell to trigger random access to the cell using an initial access configuration communicated by a network node of a communication network for performing operations such as data shower coverage for the user equipment, and the initial access configuration sequentially uses more than one pattern of at least one of a synchronization signal, a beacon, or a channel state information reference signal for at least one of synchronization acquisition, beam adjustment, and beam maintenance for access to the cell.

Description

[Technical Field]

[0001] Teachings according to example embodiments of the present invention relate generally to reducing beam refinement and synchronization delays for cell access, and more particularly to reducing beam refinement and synchronization delays for cell access using flexible initial access configurations. [Background technology]

[0002] This section is intended to provide a background or context for the invention(s) recited in the claims. The description herein may include concepts that could be pursued, but not necessarily previously conceived or pursued. Accordingly, unless otherwise indicated herein, nothing described in this section is prior art to the description and claims of this application, and no admission of prior art by inclusion in this section is intended to be construed as prior art.

[0003] Certain abbreviations that may appear in the description and / or figures are defined herein as follows: BS base station CORESET 0 Control resource set CSI-RS channel state information reference signal DL Downlink DS Data Shower gNB 5G Node B, base station IE Information Elements IR Invention Report MCG Master Cell Group MCS modulation and coding scheme MIB Master Information Block NR New Radio PBCH Physical Broadcast Channel PCell Primary Serving Cell PDCCH Physical Downlink Control Channel PL path loss PRACH Physical Random Access Channel RA Random Access RAN Radio Access Network RAT Radio Access Technology SCell Secondary Cell SCG Secondary Cell Group SIB System Information Block SS synchronization signal SSB SS / PBCH block THz Terahertz UE User Equipment UL Uplink VLC visible light communication WI work item 3GPP 3rd Generation Partnership Project

[0004] While 6G wireless systems are currently in the early stages of development, it is already clear that one of the main focuses will be supporting rate-hungry futuristic scenarios such as the ubiquitous penetration of extended reality (XR) systems, holographic telepresence, and autonomous robot collective driving.

[0005] In terms of the extremely high data rates that will be supported, 6G systems are expected to complement existing sub-5 GHz and mmWave connectivity options with wireless communications at frequencies above 71 GHz. These new connectivity options will feature large portions of contiguous spectrum, thus enabling significantly higher data rates than those offered at 5 GHz (FR1), 28 GHz (FR2), or the recently adopted 60 GHz (FR2-2).

[0006] However, one of the challenges in enabling wireless at frequencies above 71 GHz and moving towards the sub-THz (<300 GHz) and ultimately THz (>300 GHz) and visible light (VLC) regimes is the limited effective communication range.

[0007] The exemplary embodiments of the invention disclosed herein operate to address at least some of these challenges. Summary of the Invention

[0008] This section includes examples of possible implementations, but is not meant to be limiting.

[0009] In an exemplary aspect of the invention, there is an apparatus, such as a user equipment side apparatus, that includes at least one processor and at least one memory containing computer program code, the at least one memory and the computer program code configured to cause, using the at least one processor, the apparatus to at least: determine, by a user equipment of a communication network, that the user equipment accesses a cell to trigger random access to the cell, wherein the random access uses an initial access configuration communicated by a network node of the communication network, and the initial access configuration sequentially uses more than one pattern of at least one of synchronization signals, beacons, or channel state information reference signals for at least one of synchronization acquisition, beam adjustment, and beam maintenance for access to the cell; and perform random access with the cell based on the initial access configuration.

[0010] In another exemplary aspect of the invention, there is a method including: determining, by a user equipment of a communications network, that the user equipment accesses a cell to trigger random access to the cell, wherein the random access uses an initial access configuration communicated by a network node of the communications network, the initial access configuration sequentially using more than one pattern of at least one of synchronization signals, beacons, or channel state information reference signals for at least one of synchronization acquisition, beam adjustment, and beam maintenance for access to the cell; and performing random access with the cell based on the initial access configuration.

[0011] Further exemplary embodiments are apparatus and methods, including the apparatus and method of the previous paragraph, wherein the network node includes a primary serving cell, the cell includes a sub-terahertz secondary cell, accessing the sub-terahertz secondary cell is to perform data shower coverage for the user equipment, the accessing the sub-terahertz secondary cell is to perform data shower coverage for the user equipment, the decision to access the sub-terahertz secondary cell is based on an instruction from the network node, the accessing the sub-terahertz secondary cell is to perform data shower coverage for the user equipment, the one or more patterns are switched sequentially based on at least one of a configured time window, expiration of a timer, or receiving a predefined message from the network node, and the determining is based on at least one of lower layer path loss or measurements, location, velocity, or direction reported from the user equipment to the network node, and the one or more patterns are switched sequentially based on at least one of a configured time window, expiration of a timer, or receiving a predefined message from the network node. the first configuration includes at least one of a synchronization signal block transmission having a first period or a configuration for a first time window, an initial position of a subset of synchronization signal blocks of the synchronization signal block transmission providing an initial synchronization pattern of more than one pattern, the positions of the subset of synchronization signal blocks of the synchronization signal block transmission occurring at shorter intervals and times than other synchronization signal block patterns of the communication network so that the synchronization signal block transmissions occur more densely while the intervals between the synchronization signal block transmissions remain standardized, the beam maintenance is to use a synchronization maintenance pattern, the one or more patterns include at least a second configuration including a synchronization signal block transmission having a second period and a configuration for a second time window used for beam adjustment, after random access, determining beam adjustment based on switching to a synchronization signal block pattern and a channel state information reference signal pattern provided by the network node, the switchingthe determining of the beam adjustment includes utilizing a second configuration including a synchronization signal block transmission having a second period and configuration, the second period occurring at intervals and times greater than other synchronization signal block transmissions of the communication network, the second period being longer than the first period, and more than one pattern including at least a third configuration; after determining the beam adjustment, utilizing a synchronization signal block having the second period and configuration for beam adjustment and a third configuration for channel state information reference signal transmission, the channel state information reference signal pattern being dense enough to determine the beam adjustment, the dense channel state information reference signal pattern including at least one of a full 1 / 10 or 1 / 100 interval beam sweep, or selection of a beam covering a large departure angle compared to other synchronization signal block patterns; and the densely provided channel state information reference signal pattern relative to a time derived based on message timing for random access. a timer is utilized to indicate a maximum duration of a first configuration associated with an initial synchronization burst, and a second configuration is used after the timer expires; the one or more patterns include at least one bitmap indicating at least one of ssb-InitialPositions or CSIRS-RefinementPositions; the one or more patterns include at least a third configuration for beam maintenance, the third configuration including utilizing a third configuration for a synchronization signal block having at least one of channel state information reference signal transmissions having a fourth period or a fifth period after a beam adjustment determination; the initial access configuration is received from a network node prior to random access, and based on the determining, indicates a preferred modulation and coding scheme for downlink data transmission in a random access message to the network node; and the downlink data transmission is received from the network node using an aggressive modulation and coding scheme selection in response to the information received in the random access message and prior to the channel state information report.

[0012] A non-transitory computer readable medium storing program code, the program code being executed by at least one processor to perform at least the method set forth in the paragraph above.

[0013] In yet another exemplary aspect of the invention, there is an apparatus including means for determining (TRANS13D, MEM10B, PROG10C, and DP10A of FIG. 5) by a user equipment (UE10 of FIG. 5) of a communication network (network 1 of FIG. 5) that the user equipment will access a cell to trigger random access to the cell, wherein the random access uses an initial access configuration (TRANS13D, MEM10B, PROG10C, and DP10A of FIG. 5) communicated by a network node (NN12 and / or NN13 of the communication network) of the communication network, wherein the initial access configuration sequentially uses more than one pattern of at least one of synchronization signals, beacons, or channel state information reference signals for at least one of synchronization acquisition, beam adjustment, and beam maintenance for access to the cell (TRANS13D, MEM10B, PROG10C, and DP10A of FIG. 5).

[0014] In an exemplary embodiment of the invention according to the above paragraph, at least the determining means, the communicating means, and the using means comprise a non-transitory computer-readable medium [MEM10B in FIG. 5] encoded with a computer program [PROG10C in FIG. 5] executable by at least one processor [DP10A in FIG. 5].

[0015] According to the exemplary embodiment described in the above paragraph, at least the determining means, the communicating means, and the using means include a network interface and computer program code stored on a computer-readable medium and executed by at least one processor.

[0016] In another exemplary aspect of the invention, there is an apparatus, such as a network side apparatus, that includes at least one processor and at least one non-transitory memory containing computer program code, wherein the at least one memory and the computer program code are configured, using the at least one processor, to cause the apparatus to at least: determine, by a network node of a communication network, that a user equipment accesses a cell to trigger random access to the cell for the user equipment; and based on the determining, send an initial access configuration to the user equipment to trigger random access to the cell for the user equipment, wherein the initial access configuration sequentially uses more than one pattern of at least one of a data shower cell synchronization signal, a beacon, or a channel state information reference signal for at least one of synchronization acquisition, beam adjustment, and beam keeping for access to the cell.

[0017] In yet another exemplary aspect of the invention, there is a method, including: determining, by a network node of a communications network, that a user equipment accesses a cell to trigger random access to the cell for the user equipment; and based on the determining, transmitting an initial access configuration to the user equipment to trigger random access to the cell for the user equipment, wherein the initial access configuration sequentially uses more than one pattern of at least one of a data shower cell synchronization signal, a beacon, or a channel state information reference signal for at least one of synchronization acquisition, beam adjustment, and beam maintenance for access to the cell.

[0018] Further exemplary embodiments are apparatus and methods, including those of the preceding paragraph, wherein the network node includes a primary serving cell, the cell includes a sub-terahertz secondary cell, an initial access configuration is received from the network node over a frequency band lower than that of the cell, an initial access channel configuration is communicated by the network node over a frequency band lower than that of the cell, access to the sub-terahertz secondary cell is to perform data shower coverage for the user equipment, and the one or more patterns are sequentially switched based on at least one of a configured time window, expiration of a timer, or a predefined message from the network node, and determining is based on at least one of a lower layer path loss report or measurement, a position, a velocity, or a direction reported from the user equipment, and the one or more patterns are sequentially switched based on at least one of a configured time window, expiration of a timer, or a predefined message from the network node, and determining The method includes at least a first configuration used by the user equipment to acquire synchronization with the cell and to read the physical broadcast channel, the first configuration including at least one of a synchronization signal block transmission having a first period or a configuration for a first time window, an initial position of a subset of synchronization signal blocks of the synchronization signal block transmission providing an initial synchronization pattern of more than one pattern, the positions of the subset of synchronization signal blocks of the synchronization signal block transmission occurring at shorter intervals and more frequently than other synchronization signal block patterns of the communication network so as to occur more densely while the intervals of the synchronization signal block transmissions remain standardized, determining beam adjustment based on switching to the synchronization signal block pattern and the channel state information reference signal pattern provided by the network node after a random access procedure by the user equipment to the sub-terahertz secondary cell, the switching occurring at the end of the first time window or when the user equipment receives a predefined message from the network, and determining beam adjustment.and utilizing a second configuration including synchronization signal block transmissions having a second period and configuration, the second period occurring at intervals and times greater than other synchronization signal block transmissions in the communication network, the second period being longer than the first period; after determining beam adjustment, utilizing a third configuration for synchronization signal block and channel state information reference signal transmissions having the second period and configuration for beam adjustment; the channel state information reference signal pattern being dense enough to determine beam adjustment, the dense channel state information reference signal pattern including at least one of a full 1 / 10 or 1 / 100 interval beam sweep or selection of a beam covering a large departure angle compared to other synchronization signal block patterns; the densely provided channel state information reference signal pattern utilizing a timer to indicate a maximum duration of the first configuration associated with the initial synchronization burst relative to a time derived based on message timing for random access; and the second configuration being used after the timer expires; and the one or more patterns being selected based on ssb-InitialPositions or CSIRS-Refinem. the one or more patterns include at least one bitmap indicating at least one of the channel state information reference signal transmissions having a fourth period or a fifth period, the one or more patterns including at least a third configuration for beam maintenance, the third configuration including utilizing a third configuration for synchronization signal blocks having at least one of channel state information reference signal transmissions having a fourth period or a fifth period after beam adjustment determination, the initial channel configuration being communicated by the network node prior to random access, the initial access channel configuration being communicated based on a preferred modulation and coding scheme carrying a system information block in a message 3 physical uplink shared channel communicated from the user equipment to the network node, the initial access channel configuration being communicated by the network node to the user equipment using proactive modulation and coding scheme selection in response to information received in message 3 and prior to the channel state information report, receiving a preferred modulation and coding scheme for downlink data transmission from the user equipment in a random access message, the downlink data transmission being in response to information received in the random access message;and received using proactive modulation and coding scheme selection before reporting channel state information.

[0019] A non-transitory computer readable medium storing program code, the program code being executed by at least one processor to perform at least the method set forth in the paragraph above.

[0020] In yet another exemplary aspect of the invention, a network node (NN12 and / or NN13 in FIG. 5 ) of a communication network (network 1 in FIG. 5 ) determines that a user equipment (UE10 in FIG. 5 ) accesses a cell to trigger random access to the cell for the user equipment (TRANS12D and / or TRANS13D, MEM12B and / or MEM13B, PROG12C and / or PROG13C, and DP12A and / or DP13A in FIG. 5 ), and, based on the determining, transmits an initial access configuration to the user equipment (T in FIG. 5 ) to trigger random access to the cell to perform data shower coverage for the user equipment. and (RANS12D and / or TRANS13D, MEM12B and / or MEM13B, PROG12C and / or PROG13C, and DP12A and / or DP13A) means, wherein the initial access configuration sequentially uses more than one pattern of at least one of a data shower cell synchronization signal, a beacon, or a channel state information reference signal for at least one of synchronization acquisition, beam adjustment, and beam maintenance for access to the cell (TRANS12D and / or TRANS13D, MEM12B and / or MEM13B, PROG12C and / or PROG13C, and DP12A and / or DP13A in FIG. 5).

[0021] In an exemplary embodiment of the invention according to the above paragraph, at least the determining means, transmitting means, and using means include a non-transitory computer-readable medium [MEM12B and / or MEM13B in FIG. 5] encoded with a computer program [PROG12C and / or PROG13C in FIG. 5] executable by at least one processor [DP12A and / or DP13C in FIG. 5].

[0022] According to the exemplary embodiment described in the above paragraph, at least the determining means, the transmitting means, and the using means include a network interface and computer program code stored on a computer-readable medium and executed by at least one processor.

[0023] In yet another exemplary aspect of the invention, there is an apparatus, such as a network side apparatus, that includes at least one processor and at least one non-transitory memory containing computer program code, the at least one memory and the computer program code being configured, using the at least one processor, to cause the apparatus to at least: determine, by a cell of a communication network, that a user equipment accesses the cell; and, based on the determination, receive an initial access channel configuration by the user equipment by triggering random access to the cell to perform data shower coverage for the user equipment, wherein the initial access channel configuration sequentially uses more than one pattern of at least one of a data shower cell synchronization signal, a beacon, or a channel state information reference signal for beam adjustment and synchronization acquisition for access and activation of the cell for data shower coverage.

[0024] In yet another exemplary aspect of the invention, there is a method including: determining, by a cell of a communication network, that a user equipment accesses the cell; and receiving an initial access channel configuration by the user equipment based on the determining, by triggering random access to the cell to perform data shower coverage for the user equipment, wherein the initial access channel configuration sequentially uses more than one pattern of at least one of a data shower cell synchronization signal, a beacon, or a channel state information reference signal for beam adjustment and synchronization acquisition for access and activation of the cell for data shower coverage.

[0025] Further exemplary embodiments are apparatus and methods including the apparatus and method of the previous paragraph, wherein the cell includes a sub-terahertz secondary cell, wherein access to the sub-terahertz secondary cell is to perform data shower coverage for the user equipment, wherein the initial access channel configuration is communicated from a network node of the communications network over a frequency band lower than the frequency band of the cell, wherein the one or more patterns are sequentially switched based on at least one of a configured time window, expiration of a timer, or a predefined message from the network node, wherein the one or more patterns are sequentially switched based on at least one of a configured time window, expiration of a timer, or a predefined message from the network node, and wherein determining is based on at least one of a lower layer path loss report or measurement, a position, a velocity, or a direction reported from the user equipment. the one or more patterns include at least a first configuration used by the user equipment to acquire synchronization with the cell and to read the physical broadcast channel, the first configuration including at least one of a synchronization signal block transmission having a first period or a configuration for a first time window, an initial position of a subset of synchronization signal blocks of the synchronization signal block transmission providing an initial synchronization pattern of the one or more patterns, the positions of the subset of synchronization signal blocks of the synchronization signal block transmission occurring at shorter intervals and times than other synchronization signal block patterns of the communication network so as to occur more densely while the intervals of the synchronization signal block transmissions remain standardized, determining beam adjustment based on switching to the synchronization signal block pattern and the channel state information reference signal pattern provided by the network node after a random access procedure by the user equipment to the cell, the switching occurring at the end of the first time window or when the user equipment receives a predefined message from the network, and determining beam adjustment;The method includes utilizing a second configuration including synchronization signal block transmissions having a second period and configuration, the second period occurring at intervals and times greater than other synchronization signal block transmissions in the communication network, the second period being longer than the first period, and after determining the beam adjustment, utilizing a third configuration for synchronization signal block and channel state information reference signal transmissions having the second period and configuration for beam adjustment, the channel state information reference signal pattern being dense enough to determine the beam adjustment, the dense channel state information reference signal pattern including at least one of a full 1 / 10 or 1 / 100 interval beam sweep or selection of a beam covering a large departure angle compared to other synchronization signal block patterns, the densely provided channel state information reference signal pattern utilizing a timer to indicate a maximum duration of the first configuration associated with the initial synchronization burst relative to a time derived based on message timing for random access, and the second configuration being activated when the timer expires. the one or more patterns include at least one bitmap indicating at least one of ssb-InitialPositions or CSIRS-RefinementPositions, the one or more patterns including at least a third configuration for beam maintenance, the third configuration including utilizing a third configuration for synchronization signal blocks having at least one of channel state information reference signal transmissions having a fourth period or a fifth period after beam adjustment determination, the initial access channel configuration being communicated by the network node in response to random access, the initial access channel configuration being communicated based on a preferred modulation and coding scheme carrying a system information block in a message 3 physical uplink shared channel communicated from the user equipment to the network node, and the initial access channel configuration using proactive modulation and coding scheme selection in response to information received in message 3 and before channel state information reporting.

[0026] A non-transitory computer readable medium storing program code, the program code being executed by at least one processor to perform at least the method set forth in the paragraph above.

[0027] In yet another exemplary aspect of the invention, a cell of a communication network (network 1 in FIG. 5) determines that a user equipment (UE 10 in FIG. 5) accesses the cell (TRANS 12D and / or TRANS 13D, MEM 12B and / or MEM 13B, PROG 12C and / or PROG 13C, and DP 12A and / or DP 13A in FIG. 5), and based on the determining, triggers random access to the cell by the user equipment to perform data shower coverage for the user equipment (TRANS 12D and / or TRANS 13D, MEM 12B and / or MEM 13B, PROG 12C and / or PROG 13C, and DP 12A and / or DP 13A in FIG. 5), thereby performing an initial access channel. and means for receiving a cell configuration (TRANS12D and / or TRANS13D, MEM12B and / or MEM13B, PROG12C and / or PROG13C, and DP12A and / or DP13A of FIG. 5), wherein the initial access channel configuration sequentially uses more than one pattern of at least one of a data shower cell synchronization signal, a beacon, or a channel state information reference signal for beam adjustment and synchronization acquisition for access, and cell activation for data shower coverage (TRANS12D and / or TRANS13D, MEM12B and / or MEM13B, PROG12C and / or PROG13C, and DP12A and / or DP13A of FIG. 5).

[0028] In an exemplary embodiment of the invention according to the above paragraph, at least the determining means, receiving means, triggering means, and using means comprise a non-transitory computer-readable medium [MEM12B and / or MEM13B in FIG. 5] encoded with a computer program [PROG12C and / or PROG13C in FIG. 5] executable by at least one processor [DP12A and / or DP13C in FIG. 5].

[0029] According to the exemplary embodiment described in the above paragraph, at least the determining means, receiving means, triggering means, and using means include a network interface and computer program code stored on a computer-readable medium and executed by at least one processor.

[0030] The communication system includes a network side device and a user equipment side device that perform at least the above-mentioned operations.

[0031] The above and other aspects, features, and advantages of various embodiments of the present disclosure will become more fully apparent from the following detailed description taken in conjunction with the accompanying drawings, in which like reference numerals are used to designate similar or equivalent elements. The drawings are presented to facilitate a better understanding of the disclosed embodiments and are not necessarily drawn to scale. [Brief explanation of the drawings]

[0032] [Figure 1] FIG. 10 is a diagram showing a ServingCellConfigCommon information element. [Figure 2] FIG. 1 illustrates a flexible synchronization signal block design. [Figure 3] 1 is a flowchart of one proposed solution according to an exemplary embodiment of the invention. [Figure 4] FIG. 1 illustrates an example of a proposed flexible synchronization signal block configuration, according to an exemplary embodiment of the invention. [Figure 5]FIG. 1 is a high-level block diagram of various devices that may be used to implement various aspects of the invention. [Figure 6A] FIG. 1 illustrates a method according to an exemplary embodiment of the invention that may be performed by an apparatus. [Figure 6B] FIG. 1 illustrates a method according to an exemplary embodiment of the invention that may be performed by an apparatus. [Figure 6C] FIG. 1 illustrates a method according to an exemplary embodiment of the invention that may be performed by an apparatus. DETAILED DESCRIPTION OF THE INVENTION

[0033] In exemplary embodiments of the present invention, at least a method and apparatus are provided for reducing beam adjustment and synchronization delays for cell access using a flexible initial access configuration.

[0034] Similar to those mentioned above, the 6G wireless systems landscape is currently in the early stages of development, but it is clear that one of the main focuses will be supporting rate-hungry futuristic scenarios such as the ubiquitous penetration of extended reality (XR) systems, holographic telepresence, and collaborative autonomous robotics.

[0035] Therefore, in terms of the high data rates supported, 6G systems are expected to complement existing sub-5 GHz and mmWave connectivity options with wireless communications at frequencies above 71 GHz. These new connectivity options will feature large portions of contiguous spectrum, thus enabling significantly higher data rates than those offered at 5 GHz (FR1), 28 GHz (FR2), or the recently adopted 60 GHz (FR2-2).

[0036] However, one of the challenges in enabling wireless at frequencies above 71 GHz and moving towards the sub-THz (<300 GHz) and ultimately THz (>300 GHz) and visible light (VLC) regimes is the limited effective communication range.

[0037] Therefore, at least the first generation of these systems are not expected to fully cover large areas, but rather to provide sporadic coverage in strategically chosen locations with high UE density and / or flow. The latter leads to the consideration of "data showers" (DS) or "information showers," i.e., extremely high-rate but relatively short-range access points (APs), as one possible use case for wireless access above 71 GHz.

[0038] One of the challenges in utilizing data showers is the relatively short contact time between a moving UE and the DS, i.e., the time the UE is within DS coverage. In some practical scenarios, such as information showers of moving connected vehicles and intersections, the contact time can be as short as a few seconds. In this case, the contact time should be utilized effectively, minimizing the signaling overhead when joining / leaving the AP and thus maximizing the portion of resources designated for transferring the bulk of the data at extremely high rates.

[0039] To improve coverage and throughput, sub-THz and higher frequency DSs are also expected to operate with narrow beams of only a few degrees wide, which further complicates the initial access and beam acquisition and adjustment stages.

[0040] Therefore, it is desirable to reduce the time and resources required to support the initial access procedure and the channel with DS.

[0041] FIG. 5 shows a high-level block diagram of various devices that may be used to implement various aspects of the invention.

[0042] Before describing exemplary embodiments of the invention in detail, reference is made to FIG. 5, which illustrates a simplified block diagram of various electronic devices suitable for use in practicing exemplary embodiments of the present invention.

[0043] FIG. 5 shows a block diagram of one possible, non-limiting, example system in which exemplary embodiments of the invention may be practiced. In FIG. 5, user equipment (UE) 10 is in wireless communication with wireless network 1 or network 1 of FIG. 5. Wireless network 1 or network 1 of FIG. 5 may include a mobile network, e.g., a communication network such as mobile network 1 or first mobile network disclosed herein. Any reference herein to wireless network 1 of FIG. 5 may also be seen as a reference to any wireless network disclosed herein. Additionally, wireless network 1 of FIG. 5 may also include hardwired functionality as may be required by the communication network. A UE is a wireless, typically mobile, device capable of accessing a wireless network. A UE may be, for example, a mobile phone (also called a "cellular" phone) and / or a computer with mobile terminal functionality. For example, a UE or mobile terminal may also be a portable, pocket, handheld, computer-embedded, or vehicle-mounted mobile device and perform verbal signaling and / or data exchange with a RAN.

[0044] The UE 10 includes one or more processors DP10A, one or more memories MEM10B, and one or more transceivers TRANS10D, interconnected through one or more buses. Each of the one or more transceivers TRANS10D includes a receiver and a transmitter. The one or more buses may be an address bus, a data bus, or a control bus, and may include any interconnection mechanism, such as a series of wires on a motherboard or integrated circuit, optical fiber, or other optical communication equipment. Each of the one or more transceivers TRANS10D may optionally be connected to one or more antennas for communication with the NNs 12 and 13. The one or more memories MEM10B include computer program code PROG10C. The UE 10 communicates with the NNs 12 and / or 13 via wireless links 11 or 14.

[0045] The NN 12 (NR / 5G Node B, evolved NB, or LTE device) is a network node such as a master or secondary node base station (e.g., for NR or LTE Long Term Evolution) that communicates with devices such as the NN 13 and the UE 10 of FIG. 5 . The NN 12 provides wireless devices such as the UE 10 with access to the wireless network 1. The NN 12 includes one or more processors DP12A, one or more memories MEM12B, and one or more transceivers TRANS12D interconnected through one or more buses. According to an exemplary embodiment, these TRANS12D may include X2 and / or Xn interfaces used to implement exemplary embodiments of the invention. Each of the one or more transceivers TRANS12D includes a receiver and a transmitter. The one or more transceivers TRANS12D may optionally be connected to one or more antennas for communication with the UE 10 via at least link 11. The one or more memories MEM12B and computer program code PROG12C are configured to cause NN 12, using one or more processors DP12A, to perform one or more of the operations described herein. NN 12 may communicate with devices such as another gNB or eNB, or NN 13, such as via link 14. Furthermore, link 11, link 14, and / or any other links may be wired or wireless, or both, and may implement, for example, an X2 or Xn interface. Furthermore, link 11 and / or link 14 may pass through other network devices, such as, but not limited to, the NCE / MME / SGW / UDM / PCF / AMF / SMF / LMF 14 devices of FIG. 5. NN 12 may perform user plane functions and / or functions of an MME (Mobility Management Entity) or SGW (Serving Gateway), such as access management functions in LTE and similar functions in 5G.

[0046] The NN 13 may be associated with a mobility function device such as an AMF or SMF, and may further include a base station of an NR / 5G Node B or possibly an evolved NB, such as a master or secondary node base station (e.g., for NR or LTE Long Term Evolution), that communicates with devices such as the NN 12 and / or the UE 10 and / or the wireless network 1. The NN 13 includes one or more processors DP13A, one or more memories MEM13B, one or more network interfaces, and one or more transceivers TRANS13D interconnected through one or more buses. According to an exemplary embodiment, these network interfaces of the NN 13 may include X2 and / or Xn interfaces used to implement exemplary embodiments of the invention. Each of the one or more transceivers TRANS13D includes a receiver and a transmitter, which may optionally be connected to one or more antennas. The one or more memories MEM13B include computer program code PROG13C. For example, one or more memories MEM13B and computer program code PROG13C are configured to cause NN 13, using one or more processors DP13A, to perform one or more of the operations described herein. NN 13 may communicate with another mobility function device and / or eNB, such as NN 12 and UE 10 or any other device, using, for example, link 11 or link 14 or another link. Link 14 shown in FIG. 5 may be used for communication between NN 12 and NN 13. These links may be wired or wireless, or both, and may implement, for example, an X2 or Xn interface. Furthermore, as mentioned above, link 11 and / or link 14 may pass through other network devices, such as, but not limited to, NCE / MME / SGW devices, such as NCE / MME / SGW / UDM / PCF / AMF / SMF / LMF 14 in FIG. 5.

[0047] 5 may be an address bus, a data bus, or a control bus, and may include any interconnection mechanism, such as a series of wires on a motherboard or integrated circuit, optical fiber or other optical communication equipment, a wireless channel, etc. For example, one or more transceivers TRANS12D, TRANS13D, and / or TRANS10D may be implemented as a remote radio head (RRH) where other elements of NN12 are physically located differently from the RRH, and these devices may include one or more buses that may be implemented in part as optical fibers capable of connecting other elements of NN12 to the RRH.

[0048] It should be noted that while FIG. 5 shows network nodes such as NN12 and NN13, any of these nodes may incorporate or be incorporated into an eNodeB or eNB or gNB for LTE and NR, etc., and still be configurable to perform exemplary embodiments of the invention.

[0049] Also, it should be noted that while the description herein indicates that a "cell" performs the functions, it should be clear that the gNB and / or user equipment and / or mobility management function device forming the cell perform the functions. In addition, a cell forms part of a gNB, and there may be multiple cells per gNB. Furthermore, it should be noted that exemplary embodiments of the invention may be used in any type of wireless communication cell, such as, but not limited to, an LTE, NR, terahertz, or sub-terahertz cell.

[0050] The wireless network 1, or any network that the wireless network 1 may represent, may or may not include an NCE / MME / SGW / UDM / PCF / AMF / SMF / LMF 14, which may include an NCE (Network Control Element Function), an MME (Mobility Management Entity) / SGW (Serving Gateway) function, and / or a Serving Gateway (SGW), and / or an MME (Mobility Management Entity) and / or SGW (Serving Gateway) function, and / or a User Data Management Function (UDM), and / or a PCF (Policy Control) function, and / or an Access and Mobility Management Function (AMF) function, and / or a Session Management (SMF) function, and / or a Location Management Function (LMF), and / or an Authentication Server (AUSF) function, and provides connectivity with further networks, such as telephone networks and / or data communication networks (e.g., the Internet), and is configured to perform any 5G and / or NR operations in addition to or instead of other standard operations at the time of this application. The NCE / MME / SGW / UDM / PCF / AMF / SMF / LMF 14 can be configured to perform operations in accordance with exemplary embodiments of the invention in any of LTE, NR, 5G, and / or any standards-based communication technologies implemented or discussed at the time of this application. In addition, it should be noted that operations in accordance with exemplary embodiments of the invention performed by the NN 12 and / or NN 13 can also be performed in the NCE / MME / SGW / UDM / PCF / AMF / SMF / LMF 14.

[0051] The NCE / MME / SGW / UDM / PCF / AMF / SMF / LMF 14 includes one or more processors DP14A, one or more memories MEM14B, and one or more network interfaces (N / WI / F) interconnected through one or more buses coupled to link 13 and / or link 14. According to an exemplary embodiment, these network interfaces may include X2 and / or Xn interfaces used to perform exemplary embodiments of the invention. The one or more memories MEM14B include computer program code PROG14C. The one or more memories MEM14B and computer program code PROG14C are configured to cause the NCE / MME / SGW / UDM / PCF / AMF / SMF / LMF 14, using the one or more processors DP14A, to perform one or more operations that may be necessary to support operation according to exemplary embodiments of the invention.

[0052] It should be noted that NN 12 and / or NN 13 and / or UE 10 may be configured (e.g., based on standard implementations, etc.) to perform the functions of a Location Management Function (LMF). The LMF functions may be embodied in any of Content Consumer A, Content Consumer B, Dash Server, and / or Content Provider, or may be part of these network devices or other devices associated with these devices. Additionally, as described at least below, an LMF, such as the LMF of MME / SGW / UDM / PCF / AMF / SMF / LMF 14 of FIG. 5, may be co-located with UE 10, as separate from NN 12 and / or NN 13 of FIG. 5, to perform operations in accordance with the exemplary embodiments of the invention disclosed herein.

[0053] Wireless network 1 may implement network virtualization, which is the process of combining hardware and software network resources and network functionality into a single software-based management entity, a virtual network. Network virtualization involves platform virtualization, often combined with resource virtualization. Network virtualization is categorized as either external, combining many networks or portions of networks into virtual units, or internal, providing network-like functionality to software containers on a single system. It should be noted that the virtualized entities resulting from network virtualization are still implemented at the same level using hardware, such as processors DP10, DP12A, DP13A, and / or DP14A and memories MEM10B, MEM12B, MEM13B, and / or MEM14B, and that such virtualized entities produce technical effects.

[0054] The computer-readable memories MEM12B, MEM13B, and MEM14B may be of any type suitable for the local technology environment and may be implemented using any suitable data storage technology, such as semiconductor-based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, fixed memory, and removable memory. The computer-readable memories MEM12B, MEM13B, and MEM14B may be means for performing storage functions. The processors DP10, DP12A, DP13A, and DP14A may be of any type suitable for the local technology environment and may include, by way of non-limiting example, one or more of a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), and a processor based on a multi-core processor architecture. The processors DP10, DP12A, DP13A, and DP14A may be means for performing functions such as controlling the UE10, NN12, and NN13, as well as other functions described herein.

[0055] As mentioned above, it is desirable to reduce the time and resources required to support the initial access procedure and the channel with the DS.

[0056] In state-of-the-art designs, the IE ServingCellConfigCommon is used to configure the cell-specific parameters of the UE's serving cell. The IE contains parameters that the UE typically obtains from SSB, MIB, or SIB when accessing the cell from IDLE. Using this IE, the network provides this information in dedicated signaling when configuring the UE with an SCell or Supplemental Cell Group (SCG). It also provides the information to SpCells (MCG and SCG) during reconfiguration with synchronization.

[0057] According to an exemplary embodiment of the invention, the BS serving the primary cell determines that the UE should attempt to access the sub-terahertz secondary cell, and the UE then attempts to access the sub-terahertz secondary cell (using the initial access configuration that the UE receives from the primary cell).

[0058] According to another exemplary embodiment of the invention, the UE and the BS providing the secondary sub-terahertz cell determine (during a random access process) whether the UE's access to the secondary sub-terahertz cell will be successful.

[0059] Furthermore, according to an exemplary embodiment of the invention, the BS providing the primary cell indicates to the BS or network node controlling and providing the sub-terahertz secondary cell which UEs are suitable for accessing the sub-terahertz secondary cell.

[0060] In addition, the BS or network node controlling the sub-terahertz secondary cell determines an initial access configuration, which is indicated to the UE via the primary cell before the UE attempts to access the sub-terahertz secondary cell.

[0061] Figure 1 shows the ServingCellConfigCommon information element.

[0062] With reference to Figure 1,

[0063] SSB-PositionsInBurst

[0064] ssb-PositionsInBurst indicates the time-domain positions of SS blocks transmitted in a half-frame having SS / PBCH blocks, as defined in Section 4.1 of TS38.213. The first bit / left-most bit corresponds to SS / PBCH block index 0, the second bit corresponds to SS / PBCH block index 1, and so on. A value of 0 in the bitmap indicates that the corresponding SS / PBCH block is not transmitted, and a value of 1 indicates that the corresponding SS / PBCH block is transmitted. The network configures the same pattern in this field as in the corresponding field of ServingCellConfigCommonSIB.

[0065] In the prior art at the time of this application, a single quasi-static SSB pattern is configured, and the SSB position with respect to the SSB index is fixed in time, which cannot support the proposed flexible behavior.

[0066] Additionally, in current NR systems, the UE performs the following configuration before it can transmit data based on the reported CSI (including CQI): 1. The UE detects the SSB. 2. The UE determines the Type 0-PDCCH configuration from the PCBH of the SSB. 3. The UE detects a Type 0-PDCCH carrying a scheduling grant for the PDSCH carrying SIB1. 4. The UE determines the RACH configuration from SIB1. 5. The UE performs random access to the cell. a. The UE transmits a PRACH preamble associated with the selected SSB. b. The UE receives the RAR. c. The UE sends a Msg3PUSCH carrying an RRC connection request message. d. The UE receives the PDSCH carrying the RRC reconfiguration message. e. The UE sends a HARQ-ACK. 6. The UE completes the RRC connection setup. 7. The UE receives the CSI-RS configuration from the gNB. 8. The UE performs CSI measurements and sends CSI reports to the gNB. 9. The UE receives PDCCH+PDSCH from the gNB based on the reported CSI.

[0067] One of the challenges or delays that creates problems in current NR systems is the relatively long time it takes for a UE to be able to transmit data based on reported CSI (e.g., including CQI).

[0068] One general procedure for the proposed flexible initial access channel configuration according to an exemplary embodiment of the invention is outlined below. 1. Cell access to the DS is provided on the lower layer only. 2. Only a few UEs are connected to the DS at any given time. 3. Mobility, connectivity, and control are handled by lower layers. 4. The UE may trigger the DS Cell SSB / beacon through a lower frequency band, otherwise the DS Cell SSB / beacon may remain silent. Triggers are determined by the gNB based on UE path loss, location, speed and traffic. 5.After the UE triggers, o SSB and CSI-RS have multiple modes or patterns that are used sequentially in time (see Figure 1). These are indicated to the UE before the initial access attempt.

[0069] Figure 2 shows a flexible synchronization signal block design. As shown in Figure 2, there is an initial CSI-RS pattern for idle and loaded DS cells with an initial SSB pattern and candidate beams that encompass several SSB patterns, and a modified synchronization-maintenance pattern for the candidate beams. The time pattern is determined based on at least the period and time offset of the signal, which may be related to frame or slot timing or some other time reference used in the system. The time pattern configuration includes at least a parameter for the period.

[0070] In particular, the following modifications to the SSB / CSI-RS configuration are proposed: SSB / CSI-RS configuration according to: Whether the UE is the "first" UE on a sub-THz cell, or whether the sub-THz cell is already serving other UEs Which beams (and how many beams) are determined to be candidate beams for the UE? · When a cell is not in use or there are only one or two UEs in the cell, a dense synchronization burst or pattern is used. · SSB&CSI-RS is transmitted for a predetermined period of time or until the UE accesses a sub-THz cell. After initial access, the SSB switches to synchronization maintenance mode, where it is transmitted on a more restricted set of beams (based on UE feedback). SSB pattern is updated based on UE beam management. · Every UE has a dedicated configuration for SSB in maintained mode (actual SSB transmission can of course be shared). The SSB may be a signal block containing at least one synchronization signal, and the CSI-RS may be a reference signal used for channel state measurement.

[0071] Furthermore, to facilitate CSI-based data transmission capabilities, the following is proposed: o The UE provides the preferred MCS in Msg3PUSCH to the gNB, and the UE may estimate the preferred MCS from the PDSCH carrying SIB1. o The gNB may start transmitting data to the UE using MCS (aggressive MCS selection) immediately after the random access procedure based on the information received on Msg3 before reporting the CSI report.

[0072] By following these principles, a wireless system will gain at least the following advantages: The average initial access time is shorter, reducing the time during which the UE can transmit data based on the reported CSI. · The power consumption of the BS is reduced (i.e., the BS does not transmit SSB when there are no nearby UEs).

[0073] FIG. 3 shows a flowchart of one proposed solution according to an exemplary embodiment of the invention. As shown in FIG. 3, the flowchart is between a BS in a low-frequency Pcell (BS-Pcell), such as NN 12 and / or NN 13 in FIG. 5, a BS in a sub-THz Scell ​​(BS-Scell), and a UE, such as UE 10 in FIG. 5. As shown in step 1 of FIG. 3, the BS-Pcell decides to configure and activate a sub-THz cell for the UE. As shown in step 2 of FIG. 3, the BS-Pcell communicates a sub-THz configuration and activation configuration, including a UE-dedicated initial channel configuration, to the UE. Then, as shown in step 3, the UE 10 performs synchronization and measurement for sub-THz cell random access, and the BS-Scell ​​performs SSB transmission with a first period and configuration for a first time window. In step 4 of FIG. 3, the UE performs beam adjustment, and the BS-Scell ​​performs SSB transmission with a second period and configuration including a dense CSI-RS pattern for beam adjustment. Then, in step 5 of FIG. 3, the UE performs synchronization and beam maintenance, and the BS-Scell ​​performs SSB and CSI-RS transmission with the second periodicity and configuration.

[0074] It should be noted that the BSs for the low frequency Pcell and the sub-THz Scell ​​may be co-located. 1. The decision may be triggered based on a large amount of data transmitted to the UE and based on favorable conditions or location of the UE with respect to the sub-THz BS. Favorable conditions may be identified based on lower layer PL reports / measurements, UE location, speed, direction, etc. 2. The configuration message includes configurations for an initial channel containing at least one or more synchronization signals, a broadcast channel providing at least a first portion of system information, a random access channel, and a downlink control channel, which may be, for example, SS, MIB, PBCH, PRACH, PDCCH, CORESET0, etc. It includes multiple configurations for SSBs and CSI-RSs that are used sequentially. 3. The BS transmits SSBs according to a first SSB pattern. This first SSB pattern is dense in time, meaning that SSB transmissions occur at shorter intervals and the number of SSB transmissions per unit time is greater than with other SSB patterns. For example, a dense SSB pattern may transmit a full beam sweep at 1 / 10 or 1 / 100 of the typical interval. Alternatively, high density may mean that a larger beam direction selection is swept, covering a larger departure angle, compared to other SSB patterns. The density may be further adjusted based on the load present for the cell. The UE acquires synchronization with the cell based on the first SSB pattern and reads the PBCH. The UE performs random access. The UE may also report measurements to the PCell, especially if the random access fails. The SSB pattern has a predefined duration, which may also end with successful random access by the UE. The SSB may also be limited to the direction from which the UE is entering the cell (a set of gNB beams or an antenna panel). In other words, the beam directions include only a subset of the beam directions in which SSBs can be transmitted over the cell. In this alternative, only a subset of SSBs covering a subset of the beam directions can be transmitted. Because SSBs can be transmitted in only a subset of the beam directions, SSB transmissions in these beam directions occur at shorter intervals than other SSB patterns that include SSBs for a larger set of beam directions, even though the interval between successive SSB transmissions in any beam direction remains the same for all of the SSB patterns. 4. After successful random access, the BS switches to an SSB pattern sufficient for synchronization maintenance, but provides a dense CSI-RS pattern for rapid beam adjustment. The synchronization maintenance beam pattern is less dense with fewer SSBs occurring within a certain time interval. Furthermore, the synchronization maintenance beam pattern may sweep with a smaller departure angle limited to the UE's current location. 5. After beam adjustment, both SSB and CSI-RS are transmitted in a pattern sufficient for synchronization maintenance and beam management (the pattern can then be reconfigured to limit SSB transmissions to beams serving the UE and promising candidate beams for beam switching). It should be noted that the switching may occur at the end of the first time window or when the UE receives a predefined message or a configuration message from the network. Furthermore, the message may indicate a certain stage of random access, for example, random access message 2, random access message 4, or random access message B. The message indicates a certain stage of random access, for example, random access message 2, random access message 4, or random access message B. It should be noted that the random access message may also be message 3 or message A.

[0075] More details about step 2:

[0076] Step 2. Sub-THz cell configuration (see example in Figure 4):

[0077] ServingCellConfigCommon includes the following: Legacy ssb-PositionsInBurst (64-bit) bitmap of transmitted SSB patterns (0 - not transmitted / 1 - transmitted, where N is the number of 1s the bitmap contains). This provides a synchronization maintenance pattern. ssb-InitialPositions provides the initial synchronization pattern. · ssb-InitialPositions maps the SSBs (and SSB indices) in ssb-PositionsInBurst to new time positions to be used during the initial synchronization burst. ssb-InitialPositions can be [1101001]. For example, the end of the pattern is indicated by the N+1th "1" on the bitmap. The associated timer indicates the maximum duration of the initial synchronization burst, e.g., relative to a derived time based on the timing of RRC messages. CSIRS-RefinementPositions provides additional temporal (timer-limited) resources on CSI-RS for fast DL beam adjustment. A bitmap indicating special symbols on unused SSB positions that carry the CSI-RS ports associated with the SSBs associated with the PRACH occurrences used by the UE. The associated timer indicates a maximum lifetime for a time derived, for example, based on the timing of RA message 2. CSIRS-RefinementPositions can be [100101001].

[0078] FIG. 4 shows an example of a proposed flexible synchronization signal block configuration according to an exemplary embodiment of the invention.

[0079] As shown in Figure 4, there is an SSB-PositionsInBurst containing the SSB index and initial position, and a CSIRS-RefinementPositions containing the received PRACH associated with the SSB index, and the SSB for synchronization and maintenance and special CSI-RS are transmitted according to the pattern.

[0080] 6A, 6B, and 6C each illustrate a method according to an exemplary embodiment of the invention that may be performed by an apparatus.

[0081] 6A illustrates operations that may be performed by a device, such as, but not limited to, a device (e.g., UE 10 of FIG. 5). As shown in step 605 of FIG. 6A, a user equipment of a communication network determines that the user equipment accesses a cell to trigger random access to the cell. As shown in step 610 of FIG. 6A, the random access uses an initial access configuration communicated by a network node of the communication network. Then, as shown in step 615 of FIG. 6A, the initial access configuration sequentially uses more than one pattern of at least one of synchronization signals, beacons, or channel state information reference signals for at least one of synchronization acquisition, beam adjustment, and beam maintenance for access to the cell.

[0082] According to the exemplary embodiment described in the above paragraph, the network node includes a primary serving cell, the cell includes a sub-terahertz secondary cell, and the initial access configuration is received from the network node over a frequency band lower than the frequency band of the cell.

[0083] According to the exemplary embodiment described in the above paragraph, the decision to access the sub-terahertz secondary cell is based on an instruction from a network node, and the access to the sub-terahertz secondary cell provides data shower coverage for the user equipment.

[0084] According to the exemplary embodiment described in the above paragraph, more than one pattern is sequentially switched between based on at least one of a set time window, expiration of a timer, or receiving a predefined message from a network node.

[0085] According to the exemplary embodiment described in the above paragraph, the determining is based on at least one of lower layer path loss or measurements, position, velocity, or direction reported from the user equipment to the network node.

[0086] According to the exemplary embodiment described in the above paragraph, the one or more patterns include at least a first configuration used by the user equipment to acquire synchronization with the cell and to read the physical broadcast channel, the first configuration including at least one of a synchronization signal block transmission having a first periodicity or a configuration for a first time window used by the user equipment to acquire synchronization with the cell and to read the physical broadcast channel.

[0087] According to the exemplary embodiment described in the above paragraph, the initial position of a subset of synchronization signal blocks of a synchronization signal block transmission provides an initial synchronization pattern of more than one pattern.

[0088] According to the exemplary embodiment described in the above paragraph, the positions of the subset of synchronization signal blocks in a synchronization signal block transmission occur at shorter intervals and frequencies than other synchronization signal block patterns in the communication network, in order to ensure a higher density of occurrence.

[0089] According to the exemplary embodiment described in the above paragraph, random access with the cell is performed based on the initial access configuration, and beam maintenance is to use a synchronized maintenance pattern.

[0090] According to the exemplary embodiment described in the above paragraph, the one or more patterns include at least a second configuration including a synchronization signal block transmission having a second period and configuration for a second time window used for beam adjustment.

[0091] According to the exemplary embodiment described in the above paragraph, after random access, the beam adjustment is determined based on switching to a synchronization signal block pattern and a channel state information reference signal pattern provided by the network node.

[0092] According to the exemplary embodiment described in the above paragraph, the switchover occurs at the end of the first time window or when the user equipment receives a predefined message from the network.

[0093] According to the exemplary embodiment described in the above paragraph, determining the beam adjustment includes utilizing a second configuration including synchronization signal block transmissions having a second period and configuration.

[0094] According to the exemplary embodiment described in the above paragraph, the second period is longer than the first period.

[0095] According to the exemplary embodiment described in the above paragraph, more than one pattern includes at least a third configuration, and after determining the beam adjustment, utilizes the third configuration for transmitting a synchronization signal block and a channel state information reference signal having a second period and configuration for beam adjustment.

[0096] According to the exemplary embodiment described in the paragraph above, the channel state information reference signal pattern is made dense enough to determine beam adjustments, and the dense channel state information reference signal pattern includes at least one of a full 1 / 10 or 1 / 100 spacing beam sweep, or a selection of beams covering a large departure angle compared to other synchronization signal block patterns.

[0097] According to the exemplary embodiment described in the above paragraph, the densely provided channel state information reference signal pattern utilizes a timer to indicate the maximum duration of a first configuration associated with the initial synchronization burst relative to a time derived based on the message timing for random access, and the second configuration is used after the timer expires.

[0098] According to the exemplary embodiment described in the above paragraph, the more than one pattern includes at least one bitmap indicating at least one of ssb-InitialPositions and CSIRS-RefinementPositions.

[0099] According to the exemplary embodiment described in the above paragraph, the more than one pattern includes at least a third configuration for beam maintenance, and the third configuration includes that after a beam adjustment decision, a third configuration for a synchronization signal block having at least one of a channel state information reference signal transmission having a fourth period or a fifth period is utilized.

[0100] According to the exemplary embodiment described in the above paragraph, the one or more patterns include at least one bitmap indicating at least one of ssb-InitialPositions or CSIRS-RefinementPositions.

[0101] According to the exemplary embodiment described in the above paragraph, the one or more patterns include at least a third configuration for beam maintenance, and the third configuration includes utilizing a third configuration for a synchronization signal block having at least one of a channel state information reference signal transmission having a fourth period or a fifth period after a beam adjustment decision.

[0102] According to the exemplary embodiment described in the above paragraph, the initial access configuration is received from the network node before the random access.

[0103] According to the exemplary embodiment described in the above paragraph, based on determining, a preferred modulation and coding scheme for downlink data transmission is indicated in a random access message to the network node.

[0104] According to the exemplary embodiment described in the above paragraph, downlink data transmissions are received from the network node using proactive modulation and coding scheme selection in response to information received in the random access message and prior to reporting channel state information.

[0105] A non-transitory computer-readable medium (MEM10B in FIG. 5) stores program code (PROG10C in FIG. 5), which is executed by at least one processor (DP10A in FIG. 5) to perform at least the operations described in the above paragraph.

[0106] According to an exemplary embodiment of the invention described above, there is an apparatus including means for determining (TRANS13D, MEM10B, PROG10C, and DP10A of FIG. 5) by a user equipment (UE10 of FIG. 5) of a communication network (network 1 of FIG. 5) that the user equipment will access a cell to trigger random access to the cell, wherein the random access uses an initial access configuration (TRANS13D, MEM10B, PROG10C, and DP10A of FIG. 5) communicated by a network node (NN12 and / or NN13 of FIG. 5) of the communication network, wherein the initial access configuration sequentially uses more than one pattern of at least one of synchronization signals, beacons, or channel state information reference signals for at least one of synchronization acquisition, beam adjustment, and beam maintenance for access to the cell (TRANS13D, MEM10B, PROG10C, and DP10A of FIG. 5).

[0107] In an exemplary embodiment of the invention according to the above paragraph, at least the determining means, the communicating means, and the using means comprise a non-transitory computer-readable medium [MEM10B in FIG. 5] encoded with a computer program [PROG10C in FIG. 5] executable by at least one processor [DP10A in FIG. 5].

[0108] 6B illustrates operations that may be performed by a network device, such as, but not limited to, the network node NN12 or NN13 or an eNB or gNB of FIG. 5. As shown in step 630 of FIG. 6B, a network node of a communication network determines that a user equipment accesses a cell to trigger random access to the cell for the user equipment. As shown in step 635 of FIG. 6B, based on the determining, transmits an initial access configuration to the user equipment to trigger random access to the cell for the user equipment. Then, as shown in step 640 of FIG. 6B, the initial access configuration sequentially uses more than one pattern of at least one of a synchronization signal, a beacon, or a channel state information reference signal for synchronization acquisition, beam adjustment, and beam maintenance for access, and cell activation for data shower coverage.

[0109] According to the exemplary embodiment described in the above paragraph, the network node includes a primary serving cell, the cell includes a sub-terahertz secondary cell, and the initial access configuration is received from the network node over a frequency band lower than the frequency band of the cell.

[0110] According to the exemplary embodiment described in the above paragraph, the initial access channel configuration is communicated by the network node over a frequency band lower than the frequency band of the cell.

[0111] According to the exemplary embodiment described in the above paragraph, access to the sub-terahertz secondary cell is to provide data shower coverage to the user equipment.

[0112] According to the exemplary embodiment described in the above paragraph, more than one pattern is switched sequentially based on at least one of a set time window, expiration of a timer, or a predefined message from a network node.

[0113] According to the exemplary embodiment described in the above paragraph, the determining is based on at least one of lower layer path loss reports or measurements, position, velocity, or direction reported from the user equipment.

[0114] According to the exemplary embodiment described in the above paragraph, more than one pattern is switched sequentially based on at least one of a set time window, expiration of a timer, or a predefined message from a network node.

[0115] According to the exemplary embodiment described in the above paragraph, the one or more patterns include at least a first configuration used by the user equipment to acquire synchronization with the cell and to read the physical broadcast channel, the first configuration including at least one of a configuration for a synchronization signal block transmission having a first periodicity or a first time window used by the user equipment to acquire synchronization with the cell and to read the physical broadcast channel.

[0116] According to the exemplary embodiment described in the above paragraph, the initial position of a subset of synchronization signal blocks of a synchronization signal block transmission provides an initial synchronization pattern of more than one pattern.

[0117] According to the exemplary embodiment described in the above paragraph, the positions of the subset of synchronization signal blocks in a synchronization signal block transmission occur more frequently and at shorter intervals than other synchronization signal block patterns in the communication network, in order to occur more densely.

[0118] According to the exemplary embodiment described in the above paragraph, the one or more patterns include at least a second configuration for beam adjustment, the second configuration including at least one of a synchronization signal block transmission having a second period, a channel state information reference signal transmission having a third period, or a configuration for a second time window.

[0119] According to the exemplary embodiment described in the above paragraph, random access with the cell is performed based on the initial access configuration.

[0120] According to the exemplary embodiment described in the above paragraph, after a random access procedure by the user equipment to the sub-terahertz secondary cell, the beam adjustment is determined based on switching to a synchronization signal block pattern and a channel state information reference signal pattern provided by the network node.

[0121] According to the exemplary embodiment described in the above paragraph, the switchover occurs at the end of the first time window or when the user equipment receives a predefined message from the network.

[0122] According to the exemplary embodiment described in the above paragraph, determining the beam adjustment includes utilizing a second configuration that includes synchronization signal block transmissions at a second period and configuration.

[0123] According to the exemplary embodiment described in the above paragraph, the second period is longer than the first period.

[0124] According to the exemplary embodiment described in the above paragraph, after the beam adjustment is determined, a third configuration is utilized for synchronization signal block and channel state information reference signal transmissions having a second period and configuration for beam adjustment.

[0125] According to the exemplary embodiment described in the paragraph above, the channel state information reference signal pattern is made sufficiently dense to determine beam adjustments, and the dense channel state information reference signal pattern includes at least one of a full 1 / 10 or 1 / 100 spacing beam sweep, or a selection of beams covering a large departure angle compared to other synchronization signal block patterns.

[0126] According to the exemplary embodiment described in the above paragraph, the densely provided channel state information reference signal pattern utilizes a timer to indicate the maximum duration of a first configuration associated with the initial synchronization burst relative to a time derived based on the message timing for random access, and the second configuration is used after the timer expires.

[0127] According to the exemplary embodiment described in the above paragraph, the one or more patterns include at least one bitmap: [100101001] indicating at least one of ssb-InitialPositions or CSIRS-RefinementPositions.

[0128] According to the exemplary embodiment described in the above paragraph, the one or more patterns include at least a third configuration for beam maintenance, and the third configuration includes utilizing a third configuration for a synchronization signal block having at least one of a channel state information reference signal transmission having a fourth period or a fifth period after a beam adjustment decision.

[0129] According to the exemplary embodiment described in the above paragraph, the initial channel configuration is communicated by the network node prior to random access.

[0130] According to the exemplary embodiment described in the above paragraph, the initial access channel configuration is communicated based on a preferred modulation and coding scheme carrying a system information block in a Message 3 Physical Uplink Shared Channel communicated from the user equipment to the network node.

[0131] According to the exemplary embodiment described in the above paragraph, the initial access channel configuration is communicated by the network node to the user equipment using proactive modulation and coding scheme selection in response to the information received in message 3 and prior to reporting channel state information.

[0132] According to the exemplary embodiment described in the above paragraph, a preferred modulation and coding scheme for downlink data transmission is received from the user equipment in a random access message.

[0133] According to the exemplary embodiment described in the above paragraph, downlink data transmissions are received using proactive modulation and coding scheme selection in response to information received in the random access message and prior to reporting channel state information.

[0134] A non-transitory computer-readable medium (MEM12B and / or MEM13B in FIG. 5) stores program code (PROG12C and / or PROG13C in FIG. 5), which is executed by at least one processor (DP12A and / or DP13A in FIG. 5) to perform at least the operations described in the above paragraphs.

[0135] According to the exemplary embodiment of the invention described above, a network node (NN12 and / or NN13 in FIG. 5 ) of a communication network (network 1 in FIG. 5 ) determines that a user equipment (UE10 in FIG. 5 ) accesses a cell to trigger random access to the cell for the user equipment (TRANS12D and / or TRANS13D, MEM12B and / or MEM13B, PROG12C and / or PROG13C, and DP12A and / or DP13A in FIG. 5 ), and, based on the determining, transmits an initial access configuration to the user equipment to trigger random access to the cell to perform data shower coverage for the user equipment (FIG. 5 ). and (TRANS12D and / or TRANS13D, MEM12B and / or MEM13B, PROG12C and / or PROG13C, and DP12A and / or DP13A of FIG. 5 ), and wherein the initial access configuration sequentially uses more than one pattern of at least one of a data shower cell synchronization signal, a beacon, or a channel state information reference signal for at least one of synchronization acquisition, beam adjustment, and beam maintenance for access to the cell (TRANS12D and / or TRANS13D, MEM12B and / or MEM13B, PROG12C and / or PROG13C, and DP12A and / or DP13A of FIG. 5 ).

[0136] In an exemplary embodiment of the invention according to the above paragraph, at least the determining means, transmitting means, and using means include a non-transitory computer-readable medium [MEM12B and / or MEM13B in FIG. 5] encoded with a computer program [PROG12C and / or PROG13C in FIG. 5] executable by at least one processor [DP12A and / or DP13C in FIG. 5].

[0137] 6C illustrates operations that may be performed by a network device, such as, but not limited to, network node NN12 or NN13 of FIG. 5, or a cell device, such as a sub-terahertz cell device. As shown in step 650 of FIG. 6C, a cell of the communication network determines that user equipment accesses the cell. As shown in step 655 of FIG. 6C, based on the determining, receives random access from the user equipment using an initial access configuration. Then, as shown in step 660 of FIG. 6C, the initial access configuration sequentially uses more than one pattern of at least one of synchronization signals, beacons, or channel state information reference signals for synchronization acquisition, beam adjustment and beam maintenance for access, and cell activation for data shower coverage.

[0138] According to the exemplary embodiment described in the above paragraph, the cell includes a sub-terahertz secondary cell, the initial access channel configuration is from a network node associated with the communication network via user equipment, and access to the sub-terahertz secondary cell is to perform data shower coverage for the user equipment.

[0139] According to the exemplary embodiment described in the above paragraph, the initial access channel configuration is communicated from a network node of the communication network over a frequency band lower than the frequency band of the cell.

[0140] According to the exemplary embodiment described in the above paragraph, the initial access configuration is transmitted by a network node of the communication network over a frequency band lower than the frequency band of one of the cells or the primary cell.

[0141] According to the exemplary embodiment described in the above paragraph, more than one pattern is switched sequentially based on at least one of a set time window, expiration of a timer, or a predefined message from a network node.

[0142] According to the exemplary embodiment described in the above paragraph, the determining is based on at least one of lower layer path loss reports or measurements, position, velocity, or direction reported from the user equipment.

[0143] According to the exemplary embodiment described in the paragraph above, the one or more patterns include at least a first configuration used by the user equipment to acquire synchronization with the cell and to read the physical broadcast channel, the first configuration including at least one of synchronization signal block transmissions at a first period or configuration for a first time window used by the user equipment to acquire synchronization with the cell and to read the physical broadcast channel.

[0144] According to the exemplary embodiment described in the above paragraph, the initial position of a subset of synchronization signal blocks of a synchronization signal block transmission provides an initial synchronization pattern of more than one pattern. According to the exemplary embodiment described in the above paragraph, the positions of the subset of synchronization signal blocks in a synchronization signal block transmission occur more frequently and at shorter intervals than other synchronization signal block patterns in the communication network, in order to occur more densely.

[0145] According to the exemplary embodiment described in the above paragraph, the one or more patterns include at least a second configuration for beam adjustment, the second configuration including at least one of a synchronization signal block transmission having a second period, a channel state information reference signal transmission having a third period, or a configuration for a second time window.

[0146] According to the exemplary embodiment described in the above paragraph, the initial access channel configuration includes a random access configuration, a beam adjustment configuration, and a beam maintenance configuration, and the beam maintenance configuration uses a synchronized maintenance pattern.

[0147] According to the exemplary embodiment described in the above paragraph, after a random access procedure to a cell by the user equipment, the beam adjustment is determined based on switching to a synchronization signal block pattern and a channel state information reference signal pattern provided by the network node.

[0148] According to the exemplary embodiment described in the above paragraph, the switchover occurs at the end of the first time window or when the user equipment receives a predefined message from the network.

[0149] According to the exemplary embodiment described in the above paragraph, determining the beam adjustment includes utilizing a second configuration including synchronization signal block transmissions having a second period and configuration.

[0150] According to the exemplary embodiment described in the above paragraph, the second period occurs at intervals and times greater than other synchronization signal block transmissions in the communications network.

[0151] According to the exemplary embodiment described in the above paragraph, the second period is longer than the first period.

[0152] According to the exemplary embodiment described in the above paragraph, after the beam adjustment is determined, a third configuration is utilized for synchronization signal block and channel state information reference signal transmissions having a second period and configuration for beam adjustment.

[0153] According to the exemplary embodiment described in the paragraph above, the channel state information reference signal pattern is made sufficiently dense to determine beam adjustments, and the dense channel state information reference signal pattern includes at least one of a full 1 / 10 or 1 / 100 spacing beam sweep, or a selection of beams covering a large departure angle compared to other synchronization signal block patterns.

[0154] According to the exemplary embodiment described in the above paragraph, the densely provided channel state information reference signal pattern utilizes a timer to indicate the maximum duration of a first configuration associated with the initial synchronization burst relative to a time derived based on the message timing for random access, and the second configuration is used after the timer expires.

[0155] According to the exemplary embodiment described in the above paragraph, the one or more patterns include at least one bitmap indicating at least one of ssb-InitialPositions or CSIRS-RefinementPositions.

[0156] According to the exemplary embodiment described in the above paragraph, the one or more patterns include at least a third configuration for beam maintenance, and the third configuration includes utilizing a third configuration for a synchronization signal block having at least one of a channel state information reference signal transmission having a fourth period or a fifth period after a beam adjustment decision.

[0157] According to the exemplary embodiment described in the above paragraph, the initial access channel configuration is communicated by the network node in response to a random access.

[0158] According to the exemplary embodiment described in the above paragraph, the initial access channel configuration is communicated based on a preferred modulation and coding scheme carrying a system information block in a Message 3 Physical Uplink Shared Channel communicated from the user equipment to the network node.

[0159] According to the exemplary embodiment described in the above paragraph, the initial access channel configuration uses proactive modulation and coding scheme selection in response to information received in Message 3 and prior to reporting channel state information.

[0160] A non-transitory computer-readable medium (MEM12B and / or MEM13B in FIG. 5) stores program code (PROG12C and / or PROG13C in FIG. 5), which is executed by at least one processor (DP12A and / or DP13A in FIG. 5) to perform at least the operations described in the above paragraphs.

[0161] According to the exemplary embodiment of the invention described above, a cell of a communication network (network 1 in FIG. 5) determines that a user equipment (UE 10 in FIG. 5) accesses the cell (TRANS 12D and / or TRANS 13D, MEM 12B and / or MEM 13B, PROG 12C and / or PROG 13C, and DP 12A and / or DP 13A in FIG. 5), and based on the determining, the user equipment triggers a random access to the cell (TRANS 12D and / or TRANS 13D, MEM 12B and / or MEM 13B, PROG 12C and / or PROG 13C, and DP 12A and / or DP 13A in FIG. 5) for performing data shower coverage for the user equipment, thereby performing an initial access control. and means for receiving a channel configuration (TRANS12D and / or TRANS13D, MEM12B and / or MEM13B, PROG12C and / or PROG13C, and DP12A and / or DP13A of FIG. 5), wherein the initial access channel configuration sequentially uses more than one pattern of at least one of a data shower cell synchronization signal, a beacon, or a channel state information reference signal for beam adjustment and synchronization acquisition for access, and cell activation for data shower coverage (TRANS12D and / or TRANS13D, MEM12B and / or MEM13B, PROG12C and / or PROG13C, and DP12A and / or DP13A of FIG. 5).

[0162] In an exemplary embodiment of the invention according to the above paragraph, at least the determining means, receiving means, triggering means, and using means comprise a non-transitory computer-readable medium [MEM12B and / or MEM13B in FIG. 5] encoded with a computer program [PROG12C and / or PROG13C in FIG. 5] executable by at least one processor [DP12A and / or DP13C in FIG. 5].

[0163] Further, in accordance with exemplary embodiments of the invention, there is circuitry for performing operations in accordance with the exemplary embodiments of the invention disclosed herein. This circuitry may include any type of circuitry, including content encoding circuitry, content decoding circuitry, processing circuitry, image generation circuitry, data analysis circuitry, etc. Furthermore, this circuitry may include discrete circuitry, application specific integrated circuits (ASICs), and / or field programmable gate array circuits (FPGAs), etc., as well as processors specifically configured with software to perform their respective functions, or dual-core processors having software and corresponding digital signal processors, etc. Additionally, necessary inputs to and outputs from the circuitry, functions performed by the circuitry, and interconnections (possibly via inputs and outputs) of the circuitry with other components, which may include other circuits, are provided to perform the exemplary embodiments of the invention described herein.

[0164] According to exemplary embodiments of the invention disclosed in this application, the provided "circuitry" may include at least one or more, or all of the following: (a) Hardware-only circuit implementations (e.g., implementations using only analog and / or digital circuitry) (b) any combination of hardware circuitry and software, such as (to the extent applicable): (i) a combination of analog and / or digital hardware circuitry and software / firmware; (ii) Any portion of hardware processors (including digital signal processors) with software, software, and memory that work together to cause a device, such as a mobile phone or a server, to perform various functions, such as functions or operations according to the exemplary embodiments of the invention disclosed herein. (c) Hardware circuitry and / or processors, such as microprocessors or portions of microprocessors, that require software (e.g., firmware) for operation but that software may be absent when not necessary for operation.

[0165] In accordance with exemplary embodiments of the invention, there is sufficient circuitry to perform at least the novel operations disclosed in this application, and as used herein, "circuitry" refers to at least the following: (a) Hardware-only circuit implementations (e.g., implementations using only analog and / or digital circuitry) (b) Any combination of circuitry and software (and / or firmware), as applicable: (i) a combination of a processor; or (ii) portions of a processor / software (including a digital signal processor), software, and memory that work together to cause a device, such as a mobile phone or server, to perform various functions. (c) Any circuitry, such as a microprocessor or part of a microprocessor, that requires software or firmware for its operation even if the software or firmware is not physically present.

[0166] This definition of "circuit" applies to all uses of this term in this application, including in any claims. As a further example, the term "circuit" as used herein also encompasses merely a processor(s), or portion of a processor, and its(their) accompanying software and / or firmware implementations. The term "circuit" also encompasses, for example, and where applicable to particular claim elements, a baseband integrated circuit or an application processor integrated circuit for a mobile phone, or similar integrated circuits in a server, cellular network device, or other network device.

[0167] In general, various embodiments may be implemented in hardware or special-purpose circuits, software, logic, or any combination thereof. For example, some aspects may be implemented in hardware, while others may be implemented in firmware or software that may be executed by a controller, microprocessor, or other computing device, but the invention is not limited thereto. Although various aspects of the invention may be shown or described as block diagrams, flowcharts, or using some other graphical representation, these blocks, apparatus, systems, techniques, or methods described herein may be implemented in, by way of non-limiting example, hardware, software, firmware, special-purpose circuits or logic, general-purpose hardware or controller, or other computing device, or some combination thereof.

[0168] Embodiments of the invention may be practiced in a variety of components, such as integrated circuit modules. The design of integrated circuits is generally a highly automated process. Complex and sophisticated software tools are available to convert logic-level designs into semiconductor circuit designs ready to be etched and formed on semiconductor substrates.

[0169] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. All of the embodiments described in this detailed description are exemplary embodiments provided to enable any person skilled in the art to make or use the invention and not to limit the scope of the invention, which is defined by the claims.

[0170] The foregoing description provides, by way of illustrative and non-limiting example, the most informative description of the best method and apparatus presently contemplated by the inventor for carrying out the invention. However, various modifications and adaptations may become apparent to those skilled in the relevant art in light of the foregoing description, when read in conjunction with the accompanying drawings and the appended claims. However, all such and similar modifications of the teachings of this invention are still intended to be within the scope of this invention.

[0171] It should be noted that the terms “connected” or “coupled,” or any variation thereof, refer to any connection or coupling, direct or indirect, between two or more elements and may encompass the presence of one or more intermediate elements between two “connected” or “coupled” elements. The coupling or connection between elements may be physical, logical, or a combination thereof. As employed herein, two elements may be considered “connected” or “coupled” by the use of one or more wires, cables, and / or printed electrical connections, as well as by the use of electromagnetic energy, such as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0172] Moreover, some of the features of the preferred embodiments of the present invention may be used to advantage without the corresponding use of other features. Accordingly, the foregoing description should be considered merely as illustrative, and not in limitation, of the principles of the invention.

Claims

1. determining, by a user equipment of a communication network, that the user equipment accesses the cell to trigger random access to the cell; the random access using an initial access configuration communicated by a network node of the communications network; the initial access configuration sequentially using more than one pattern of at least one of synchronization signals, beacons, or channel state information reference signals for at least one of synchronization acquisition, beam adjustment, and beam maintenance for access to the cell; and 10. The method of claim 1, wherein the network node includes a primary serving cell, the cell including a sub-terahertz secondary cell, and the initial access configuration is received from the network node over a frequency band lower than a frequency band of the cell.

2. 2. The method of claim 1, wherein the decision to access the sub-terahertz secondary cell is based on an instruction from the network node, and the access to the sub-terahertz secondary cell is to provide data shower coverage for the user equipment.

3. 2. The method of claim 1, wherein the one or more patterns are switched sequentially based on at least one of a set time window, expiration of a timer, or receiving a predefined message from the network node.

4. 2. The method of claim 1, wherein the determining is based on at least one of lower layer path loss or measurements, position, velocity, or direction reported from the user equipment to the network node.

5. 2. The method of claim 1, wherein the one or more patterns include at least a first configuration used by the user equipment to acquire synchronization with the cell and to read a physical broadcast channel, the first configuration including at least one of a synchronization signal block transmission having a first periodicity and / or a configuration for a first time window.

6. The method of claim 1 , wherein an initial position of a subset of synchronization signal blocks of the synchronization signal block transmission provides an initial synchronization pattern of the more than one pattern.

7. 7. The method of claim 6, wherein the initial positions of the subset of synchronization signal blocks of the synchronization signal block transmission occur more frequently and at shorter intervals than other synchronization signal block patterns of the communication network to provide a higher density of occurrence.

8. The method of claim 1 , further comprising: performing random access with the cell based on the initial access configuration.

9. 2. The method of claim 1, wherein the one or more patterns include at least a second configuration for beam adjustment, the second configuration including at least one of a synchronization signal block transmission having a second period, a channel state information reference signal transmission having a third period, or a configuration for a second time window.

10. 10. The method of claim 9, comprising determining the beam adjustment based on switching to a synchronization signal block pattern and / or a channel state information reference signal pattern provided by the network node after the random access.

11. The method of claim 10 , wherein the switching occurs at the end of the first time window or when the user equipment receives a predefined message from a network.

12. The method of claim 9 , wherein the second period is longer than the first period.

13. 10. The method of claim 9, wherein the channel state information reference signal pattern is made dense enough to determine the beam adjustment, and the dense channel state information reference signal pattern includes at least one of a full 1 / 10 or 1 / 100 spacing beam sweep, or a selection of beams covering a large departure angle compared to other synchronization signal block patterns.

14. 14. The method of claim 13, wherein the densely provided channel state information reference signal pattern utilizes a timer to indicate a maximum duration of the first configuration associated with an initial synchronization burst relative to a time derived based on a message timing for the random access, and the second configuration is used after the timer expires.

15. 15. The method of claim 14, wherein the one or more patterns include at least one bitmap indicating at least one of ssb-InitialPositions or CSIRS-RefinementPositions.

16. the one or more patterns include at least a third configuration for beam maintenance, the third configuration comprising:

2. The method of claim 1, comprising, after determining the beam adjustment, utilizing the third configuration for a synchronization signal block having at least one of a channel state information reference signal transmission having a fourth period or a fifth period.

17. The method of claim 1 , wherein the initial access configuration is received from the network node before the random access.

18. 18. The method of any one of claims 1 to 17, further comprising indicating a preferred modulation and coding scheme for downlink data transmission in a random access message to the network node based on said determining.

19. 20. The method of claim 18, wherein the downlink data transmission is received from the network node using aggressive modulation and coding scheme selection in response to information received in the random access message and prior to reporting channel state information.

20. 1. An apparatus comprising: at least one processor; at least one non-transitory memory containing computer program code, wherein the at least one non-transitory memory and the computer program code are transmitted to the device using the at least one processor, at least one non-transitory memory configured to cause the device to determine that the device accesses the cell to trigger a random access to the cell; Equipped with the random access using an initial access configuration communicated by a network node of a communications network; the initial access configuration sequentially using more than one pattern of at least one of synchronization signals, beacons, or channel state information reference signals for at least one of synchronization acquisition, beam adjustment, and beam maintenance for access to the cell; and 10. The apparatus, wherein the network node includes a primary serving cell, the cell including a sub-terahertz secondary cell, and the initial access configuration is received from the network node over a frequency band lower than a frequency band of the cell.

21. determining, by a network node of a communications network, that a user equipment accesses a cell to trigger random access to the cell for the user equipment; transmitting an initial access configuration to the user equipment to trigger the random access to the cell for the user equipment based on the determining; Including, the initial access configuration sequentially using more than one pattern of at least one of synchronization signals, beacons, or channel state information reference signals for at least one of synchronization acquisition, beam adjustment, and beam maintenance for access to the cell; and 10. The method of claim 1, wherein the network node includes a primary serving cell, the cell including a sub-terahertz secondary cell, and the initial access configuration is received from the network node over a frequency band lower than a frequency band of the cell.

22. 22. The method of claim 21, wherein an initial channel configuration is received by the network node prior to the random access.

23. 23. The method of any one of claims 21 to 22, wherein the initial access configuration is communicated based on a preferred modulation and coding scheme carrying a system information block in a Message 3 Physical Uplink Shared Channel received by the network node from the user equipment.

24. 24. The method of claim 23, wherein the initial access configuration is communicated by the network node to the user equipment using aggressive modulation and coding scheme selection in response to information received in message 3 and prior to channel state information reporting.

25. 22. The method of claim 21, further comprising receiving from the user equipment a preferred modulation and coding scheme for downlink data transmission in a random access message.

26. 1. An apparatus comprising: at least one processor; at least one non-transitory memory containing computer program code, wherein the at least one non-transitory memory and the computer program code are transmitted to the device using the at least one processor, determining, by the apparatus, that a user equipment of a communication network accesses the cell to trigger random access to the cell for the user equipment; at least one non-transitory memory configured to cause the user equipment to transmit an initial access configuration through a network node of the communications network to trigger the random access to the cell for the user equipment based on the determination; and Equipped with the initial access configuration sequentially using more than one pattern of at least one of synchronization signals, beacons, or channel state information reference signals for at least one of synchronization acquisition, beam adjustment, and beam maintenance for access to the cell; and 10. The apparatus, wherein the network node includes a primary serving cell, the cell including a sub-terahertz secondary cell, and the initial access configuration is received from the network node over a frequency band lower than a frequency band of the cell.

27. determining, by a cell of a communication network, that a user equipment accesses said cell; receiving a random access from the user equipment using an initial access configuration communicated by a network node of the communications network based on the determining; Including, the initial access configuration sequentially using more than one pattern of at least one of synchronization signals, beacons, or channel state information reference signals for at least one of synchronization acquisition, beam adjustment and beam maintenance for access, and activation of the cell for data shower coverage; 10. The method of claim 1, wherein the network node includes a primary serving cell, the cell including a sub-terahertz secondary cell, and the initial access configuration is received from the network node over a frequency band lower than a frequency band of the cell.

28. 28. The method of claim 27, wherein the initial access configuration is transmitted by a network node of the communications network over a frequency band lower than a frequency band of one of the cells or a primary cell.

29. 28. The method of claim 27, wherein an initial access configuration is communicated by a network node in response to the random access.

30. 30. The method of any one of claims 27 to 29, wherein the initial access configuration is communicated based on a preferred modulation and coding scheme carrying a system information block in a Message 3 Physical Uplink Shared Channel communicated from the user equipment to the network node.

31. 31. The method of claim 30, wherein the initial access configuration uses proactive modulation and coding scheme selection in response to information received in message 3 and prior to channel state information reporting.

32. 1. An apparatus comprising: at least one processor; at least one non-transitory memory containing computer program code, wherein the at least one non-transitory memory and the computer program code are transmitted to the device using the at least one processor, determining, by a cell of a communication network, that a user equipment accesses said cell; at least one non-transitory memory configured to, based on the determination, cause the user equipment to receive an initial access channel configuration through a network node of the communications network by triggering random access to the cell for the user equipment; and Equipped with the initial access configuration sequentially uses more than one pattern of at least one of synchronization signals, beacons, or channel state information reference signals for synchronization acquisition, beam adjustment and beam maintenance for access, and activation of the cell for data shower coverage; 10. The apparatus, wherein the network node includes a primary serving cell, the cell including a sub-terahertz secondary cell, and the initial access configuration is received from the network node over a frequency band lower than a frequency band of the cell.

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