Preamble terminal and transmission method

Abstract

A user device according to one embodiment of the present invention includes a configuration information manager that manages allocation information in relation to a rach resource that is allocated by ofdm symbol units, and can be used to transmit a preamble; and a transmitter that transmits the preamble according to the allocation information.

Description

1 / 31 PREAMBLE TERMINAL AND TRANSMISSION METHOD TECHNICAL FIELD

[001] The present invention relates to user equipment, a base station and a method of random access control. TECHNICAL BACKGROUND

[002] In the 3GPP (Partnership Project for the 35th Generation), communication standards (5G or NR) were discussed as the next generation of LTE (Long Term Evolution) and LTE-Advanced. In an NR system, as in LTE and similar systems, random access is assumed to be performed in the case where the user equipment (UE) establishes a connection with a base station (eNB or eNodeB) or establishes a reconnection.

[003] When random access is performed in LTE and LTE Enhanced, the UE user equipment transmits a preamble (PRACH preamble) selected from multiple preambles prepared in a cell. Upon detecting a preamble, the base station eNB transmits a RAR (RACH response) as response information. The UE user equipment that received the RAR transmits an RRC connection request as message 3. After receiving message 3, the base station eNB transmits an RRC Connection Definition as message 4, which includes cell configuration information and similar details to establish a connection. The UE user equipment with its UE ID included in message 4 completes the random access process and establishes a connection.

[004] A channel for transmitting a preamble initially in random access is referred to as a Physical Random Access Channel (PRACH), and configuration information relating to a PRACH (PRACH Configuration) is indicated to the UE user equipment by a base station index. Petition 870190138225, dated 12 / 23 / 2019, pp. 104 / 137 2 / 31 eNB. In other words, the UE user equipment selects a PRACH feature (referred to as a PRACH feature below) based on the indicated PRACH configuration of the eNB base station.

[005] The PRACH configuration also corresponds to a preamble format, and the UE user equipment transmits a preamble using a preamble format corresponding to the PRACH configuration (see non-patented document 1). RELATED TECHNICAL DOCUMENT [NON-PATENTY DOCUMENT] [NON-PATENTED DOCUMENT 1] 3GPP TS36.211 V14.2.0 (2017-03) SUMMARY OF THE INVENTION PROBLEM TO BE SOLVED BY THE INVENTION

[006] In LTE, the time span of a RACH resource determined by a preamble format corresponds to one to three subframes, except for preamble format 4. Preamble format 4 has a time span shorter than a subframe, which must be transmitted within an UpPTS (Uplink Pilot Time Slot) in a special TDD (Time Division Duplexing) subframe.

[007] In NR, it is assumed that preambles having various time spans are used. For example, in NR preambles, it is assumed that various subcarrier spacings are supported, such as 1.25 kHz, 5.0 kHz, 15 kHz, 30 kHz, 60 kHz, and 120 kHz. Depending on the subcarrier spacing, the time span of a single OFDM (Orthogonal Frequency Division Multiplexing) symbol varies, and the duration of a RACH resource used for the transmission of a preamble also varies.

[008] In addition, for beam scanning performed when Petition 870190138225, dated 12 / 23 / 2019, pp. 105 / 137 3 / 31 Receiving a preamble at a base station, and for coverage extension by combination reception, and similar purposes, an OFDM symbol can be repeated within a RACH resource that is used for transmitting a preamble. For example, it is also assumed that a CP (Cyclic Prefix) is provided at the head of a RACH resource and a GT (Guard Time) is provided at the end, and between them, multiple OFDM symbols are repeated. In the case where the number of repetitions of the OFDM symbol varies, even for the same subcarrier spacing, the duration of the RACH resource varies.

[009] Furthermore, as the duration of the CP (cyclic prefix) and the duration of the GT (guard time) are defined depending on a time delay and / or a propagation delay depending on an assumed cell radius, for a different assumed cell radius, the duration time of the RACH feature varies.

[010] In this way, in NR, since the duration of a RACH resource varies by OFDM symbol units, there is a probability that the allocation of RACH resources by subframe units as conventionally performed may not result in proper scheduling. For example, considering scheduling in a TDD band or in a dynamic TDD, the conventional allocation of RACH resources by subframe units may not reflect the idea of ​​placing data and downlink control information in a subframe where the RACH resource should be placed. In the case where downlink control information cannot be transmitted due to the allocation of RACH resources, scheduling including data transmission should be restricted. Also, in NR, there is a probability that multiple SS (synchronization signal) blocks may be Petition 870190138225, dated 12 / 23 / 2019, pp. 106 / 137 4 / 31 allocated depending on the assumed number of beams on the base station side. In such a case, if no RACH resource allocation method is available that is adaptable to the remaining usable uplink resources in a slot where an SS block exists, it is necessary to avoid the slot where the SS block exists in order to allocate a RACH resource. For example, in the case where slots where SS blocks exist are allocated consecutively, it is assumed that the random access delay becomes greater.

[011] It is desirable to place a RACH resource in an appropriate position according to various use cases, for example, as described above.

[012] To place a RACH resource in an appropriate position, according to various use cases and the like, it is an object of the present invention to provide a scheme that allocates a RACH resource by OFDM symbol units. WAYS TO SOLVE THE PROBLEM

[013] A user device according to an embodiment of the present invention includes a configuration information manager that manages allocation information in relation to a RACH resource that is allocated by OFDM symbol units, and can be used to transmit a preamble; and a transmitter that transmits the preamble in accordance with the allocation information. EFFECT OF THE PRESENT INVENTION

[014] According to the present invention, it is possible to allocate a RACH resource by OFDM symbol units. Furthermore, it is possible to allocate the RACH resource in an appropriate position, according to various use cases and the like. BRIEF DESCRIPTION OF THE FIGURES Petition 870190138225, dated 12 / 23 / 2019, pp. 107 / 137 5 / 31

[015] FIG. 1 is a diagram illustrating random access in a wireless communication system in one embodiment of the present invention;

[016] FIG. 2 is a sequence diagram illustrating random access steps in a wireless communication system according to an embodiment of the present invention;

[017] FIG. 3 is a first diagram that illustrates an example of RACH resource allocation;

[018] FIG. 4 is a diagram that illustrates an example of a preamble transmitted in a RACH resource;

[019] FIG. 5 is a second diagram that illustrates an example of RACH resource allocation;

[020] FIG. 6 includes diagrams illustrating examples in which a RACH feature and other signals are placed in a single slot;

[021] FIG. 7 is a third diagram that illustrates an example of RACH resource allocation;

[022] FIG. 8 includes fourth diagrams illustrating examples of RACH resource allocation;

[023] FIG. 9 is a block diagram that illustrates an example of a functional configuration of a base station;

[024] FIG. 10 is a block diagram that illustrates an example of a functional configuration of user equipment; and

[025] FIG. 11 is a diagram illustrating an example of a hardware configuration of a wireless communication device according to an embodiment of the present invention. MODALITIES FOR CARRYING OUT THE INVENTION

[026] In what follows, modalities will be described with reference to the figures. Note that the modalities described below are merely Petition 870190138225, dated 12 / 23 / 2019, pp. 108 / 137 6 / 31 examples, and an embodiment to which the present invention may be applied is not necessarily limited to the embodiments below.

[027] In embodiments, the terms defined in LTE will be used appropriately for description. Furthermore, when a wireless communication system operates, it is possible to appropriately use existing technologies defined in LTE. However, existing technologies are not limited to those of LTE. In addition, unless otherwise specified, the term LTE in this descriptive report is used in a broader sense, covering LTE-Advanced and post-LTE-Advanced schemes. Furthermore, the present invention can also be applied to schemes other than LTE, in which random access can be applied.

[028] Furthermore, although existing terms used in LTE, such as RACH and preamble, are used in the modes, this is for convenience of description, and substantially the same signals as these may be named differently. <Visão geral de um sistema de comunicação sem fio>

[029] FIG. 1 is a diagram illustrating random access in a 10-mode wireless communication system. As illustrated in FIG. 1, the 10-mode wireless communication system includes a base station 100 and user equipment 200. In the example in FIG. 1, although a single base station 100 and a single user equipment unit 200 are illustrated, multiple base stations 100 and multiple user equipment units 200 may be included. Note that the base station 100 may be referred to as BS and the user equipment 200 may be referred to as UE.

[030] Base station 100 can accommodate one or more (e.g., three) cells (also referred to as sectors). In the case where the base station Petition 870190138225, dated 12 / 23 / 2019, pp. 109 / 137 7 / 31 100 accommodates multiple cells, the entire coverage area of ​​the base station can be segmented into multiple smaller areas, and in each of the smaller areas, a base station subsystem (e.g., a small indoor RRH (Remote Radio Head) base station) can provide communication services. The term cell or sector indicates part or all of the coverage area of ​​the base station and / or the base station subsystem that provides communication services. Furthermore, the terms base station, eNB, cell, and sector can be used interchangeably in this specification. The base station 100 can also be referred to as a fixed station, a NodeB, an eNodeB (eNB), an access point, a femtocell, a small cell, or similar.

[031] User equipment 200 may be referred to as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or various other terms appropriate to those skilled in the art.

[032] When user equipment 200 establishes a connection or resynchronizes with base station 100 to initiate transmission or handover, random access is performed. A channel for transmitting a preamble initially in random access is referred to as a Physical Random Access Channel (PRACH). The user equipment transmits a preamble using a feature (RACH feature) indicated from the base station. The RACH feature may be indicated as a preamble format.

[033] The RACH feature is placed, for example, in a part Petition 870190138225, dated 12 / 23 / 2019, pp. 110 / 137 8 / 31 predetermined of the resources configured in the time domain and frequency domain. Regarding resources in the time domain, a unit of data allocation on the time axis determined based on one of the subcarrier spacings can be called a slot. A slot and a symbol both represent a unit of time to transmit a signal. A slot and a symbol can be named differently, respectively.

[034] In this modality, assuming that preambles with varying durations are used, a scheme will be described for allocating a RACH resource by OFDM symbol units. <Etapas de acesso aleatório em sistemas de comunicação sem fio>

[035] Next, the random access steps and a method for determining the transmission power of a preamble in the wireless communication system according to the present embodiment will be described in detail. FIG. 2 is a sequence diagram illustrating random access steps in a wireless communication system according to an embodiment of the present invention.

[036] Base station 100 generates configuration information that must be used by user equipment 200 to transmit a preamble in random access, and transmits the configuration information (S201). In this mode, base station 100 transmits to user equipment 200 allocation information for a RACH resource that can be used by user equipment 200 to transmit a preamble. The RACH resource can be defined by the units of the OFDM symbols, and the allocation information for the RACH resource can include a position that designates an OFDM symbol of the RACH resource in a slot. The allocation information can also include the number of repetitions in the case where the Petition 870190138225, dated 12 / 23 / 2019, pp. 111 / 137 9 / 31 The RACH resource is repeatedly placed in the slot along the time axis and / or an interval between RACH resources in the case where the RACH resource is repeatedly placed in the slot along the time axis. Assuming a case where user equipment 200 transmits a single preamble on a single RACH resource according to the preamble format, in the case where the RACH resource is repeatedly placed, user equipment 200 can select one of the RACH resources to transmit a preamble, or it can select multiple RACH resources to transmit a preamble.

[037] Note that before receiving configuration information from base station 100 (S201), user equipment 200 receives a synchronization signal (SS), broadcast information, and similar information from base station 100. Although the slot duration varies depending on the subcarrier spacing, user equipment 200 can detect a slot based on the subcarrier spacing of an SS block that includes the synchronization signal, or it can detect a slot based on the subcarrier spacing indicated by the broadcast information or similar information. Hereafter, a slot detected by user equipment 200 will be referred to as an assumed slot. Specific examples of RACH resource allocation in an assumed slot will be described below. <Exemplo específico 1>

[038] FIG. 3 is a first diagram illustrating an example of RACH resource allocation. For example, as illustrated in FIG. 3, in the case where 14 OFDM symbols are included in a hypothetical slot and an index is provided for each OFDM symbol sequentially starting from 1, the RACH resource allocation information might include 5 as the initial index of the RACH resource. Note that the index does not need to be provided for each symbol. Petition 870190138225, dated 12 / 23 / 2019, pp. 112 / 137 10 / 31 OFDM sequentially; for example, an index may be given to two OFDM symbols or an index may be given to three or more OFDM symbols. For example, when the RACH feature is repeatedly placed three times, the allocation information may include 3 as the number of repetitions. Note that although FIG. 3 illustrates an example where the RACH feature is repeated consecutively, the RACH features may be placed at a regular interval between them. In this case, the allocation information may include the interval between the RACH features.

[039] FIG. 4 is a diagram illustrating an example of a preamble transmitted in a RACH resource; In the RACH resource illustrated in FIG. 3, user equipment 200 can transmit multiple repeated OFDM symbols. For example, as illustrated in FIG. 4, a CP can be provided at the head of the RACH resource and a GT (guard time) can be provided at the end, to repeatedly transmit multiple OFDM symbols between them. Furthermore, the CP can be inserted between the OFDM symbols and, for each OFDM symbol, a different sequence can be used. <Exemplo específico 2>

[040] FIG. 5 is a second diagram illustrating an example of RACH resource allocation. For example, as illustrated in FIG. 5, a RACH resource can be placed in a predetermined position at the end of an assumed slot. Note that the RACH resource cannot always be placed at the end of the assumed slot, and can be placed in a position several OFDM symbols before the end. Furthermore, the RACH resource can be repeatedly placed from the end to the beginning. For example, when the RACH resource is repeatedly placed three times, the allocation information might include 3 as the number of repetitions. Note that although FIG. 5 illustrates an example where the RACH resource is repeated Petition 870190138225, dated 12 / 23 / 2019, pp. 113 / 137 11 / 31 consecutively, RACH resources can be placed at regular intervals between them. In this case, the allocation information can include the interval between RACH resources.

[041] FIG. 6 includes diagrams illustrating examples in which a RACH feature and other signals are placed in a single slot. FIG. 6 (A) illustrates an example in which a single RACH feature is placed at the end of an assumed slot, and FIG. 6 (B) illustrates an example in which a RACH feature is placed at the end of an assumed slot and repeated from the end to the beginning. For example, in the first several OFDM symbols (e.g., first to third OFDM symbols) in the slot, downlink control information may be placed, including downlink data scheduling information determined by base station 100. In addition, multiple SS blocks may be placed in the slot. Provided that the downlink control information and SS blocks are not placed in the OFDM symbols at the end, placing the RACH feature starting from the end, as illustrated in FIG.5. It is possible to avoid downlink control information and SS blocks in the case of a TDD slot. Note that although the example in FIG. 6 illustrates that the RACH resource is placed from the end, it is also possible to place a RACH resource by specifying the starting index of the RACH resource. <Exemplo específico 3>

[042] FIG. 7 is a third diagram illustrating an example of RACH resource allocation; for example, a RACH resource can be determined by its relative position with respect to an SS block. In other words, the allocation information of a RACH resource can also include its relative position with respect to an SS block in a slot. As described above, since user equipment 200 can comprise a slot Petition 870190138225, dated 12 / 23 / 2019, pp. 114 / 137 12 / 31 assumed, based on an SS block or similar that has been received or has the highest reception power, if the relative position with respect to the SS block in the slot can be recognized, it is possible to recognize the position of the RACH feature in the SS block. Furthermore, in the case where analog beamforming is used at the base station, it is necessary to define a corresponding RACH feature for each SS block at a different time interval from each other. In this case, if the relative position with respect to each SS block is specified, it is possible for user equipment 200 to understand multiple RACH features.

[043] Note that the RACH feature can be placed repeatedly in FIG. 7 as well. As illustrated in FIG. 3, repeated RACH features can be placed backward from the RACH feature determined by its relative position with respect to an SS block, or as illustrated in FIG. 5, they can be placed forward from the RACH feature determined by its relative position with respect to an SS block. In this way, it is possible to combine specific example 3 with specific example 1 or specific example 2. For example, when the RACH feature is repeatedly placed three times, the allocation information can include 3 as the number of repetitions. Furthermore, RACH features can be placed at a regular interval between them. In this case, the allocation information can include the interval between the RACH features. <Exemplo específico 4>

[044] FIG. 8 includes fourth diagrams illustrating examples of RACH resource allocation. RACH resource allocation information can be defined in advance for a preamble format that specifies the duration of a preamble sequence, subcarrier spacing, CP duration, GT duration, or similar. Additionally, an index can be Petition 870190138225, dated 12 / 23 / 2019, pp. 115 / 137 13 / 31 provided for each preamble format. For example, for preamble format 1, a RACH feature placement can be defined in which a RACH feature for two OFDM symbols is placed repeatedly three times from the end to the beginning of an assumed slot; or for preamble format 2, a RACH feature placement can be defined in which a RACH feature for 12 OFDM symbols is placed from the end to the beginning of an assumed slot. Furthermore, different RACH feature placements can be defined for the respective preamble formats, and one of them to be used can be indicated to user equipment 200 from base station 100 by the index. Although FIG.8. Illustrate an example in which a RACH resource is placed from the end; it is also possible to define a RACH resource placement that has a specified starting index for each preamble format, and it is also possible to define a RACH resource placement by its relative position with respect to an SS block. In this way, it is possible to combine specific example 4 with specific example 1 to specific example 3. The type of RACH resource placement to be used when user equipment 200 transmits a preamble, depending on the preamble format, can be designated in the configuration information (S201) to be transmitted to user equipment 200 from base station 100.

[045] As in the examples above, allocation information may include the number of repetitions. Additionally, RACH resources may be placed at regular intervals. In this case, allocation information may include the interval between RACH resources. Note that if the number of repetitions and / or the interval between RACH resources are different, different placements of RACH resources will be required. Petition 870190138225, dated 12 / 23 / 2019, pp. 116 / 137 14 / 31 can be defined, and different numbers of repetitions and / or intervals between RACH features can be specified in the same RACH feature placement.

[046] The transmission (S201) of configuration information from base station 100 to user equipment 200 may be performed by broadcast information, or by RRC (Radio Resource Control), DCI (Downlink Control Information), or similar signaling. The transmission of configuration information from base station 100 to user equipment 200 may also be performed by a combination of broadcast information, RRC, DCI, and similar signaling. In the case where this combination is used, user equipment 200 may use the configuration information according to the previously determined priority.For example, in the case where configuration information is indicated by RRC signaling after configuration information is indicated by broadcast information, the RRC signaling may be prioritized, and the configuration information indicated by broadcast information may be discarded. Note that this prioritization is just an example, and any prioritization may be used.

[047] Note that it is also possible to define all or part of the above configuration information in advance in the specification. Furthermore, it is also possible to define not only the configuration information, but also the information indicated or assigned to user equipment 200 from base station 100 in the mode, in the specification in advance. For example, any of the repetition numbers in the case where a RACH resource is repeatedly placed in a slot, or the interval between RACH resources in the case where RACH resources are repeatedly placed in a slot, can be defined in the specification with Petition 870190138225, dated 12 / 23 / 2019, pp. 117 / 137 15 / 31 in advance.

[048] Although FIGS. 3 to FIGS. 8 illustrate the positions of RACH resources in their respective slots, a RACH resource cannot always be included in all slots. In other words, RACH resources can be placed in some slots, and the position in a slot having a RACH resource placed can be transmitted to user equipment 200 from base station 100 as allocation information. The allocation information related to the position in a slot having a RACH resource placed can be transmitted separately or together with the allocation information related to the position of the RACH resource in the slot.

[049] For example, the index of a slot used as a reference when placing a RACH resource, and the interval (cycle) of slots placed repeatedly after the reference slot can be transmitted as allocation information. For example, the allocation information might include that RACH resources are placed every two slots from a slot whose index is 1. Additionally, a slot used as a reference can be determined by its relative or similar position relative to a slot in which an SS block exists. In this case, the allocation information might include the relative position relative to a slot in which an SS block exists. Furthermore, for each preamble format, different allocation information can be defined, which can be indicated to user equipment 200 from base station 100.

[050] User equipment 200 receives configuration information from base station 100 and transmits a preamble in accordance with the allocation information for a RACH resource included in the configuration information (S203). Additionally, base station 100 receives the preamble transmitted from user equipment 200 in accordance with Petition 870190138225, dated 12 / 23 / 2019, pp. 118 / 137 16 / 31 the RACH resource allocation information. As described above, user equipment 200 can understand an assumed slot based on an SS block and similar. In the case of receiving the position that designates an OFDM symbol of a RACH resource in a slot of base station 100, user equipment 200 transmits a preamble in the corresponding OFDM symbol.

[051] Furthermore, if the number of repetitions when a RACH resource is repeatedly placed in a slot and / or the interval between RACH resources when the RACH resource is repeatedly placed in a slot is received from base station 100, user equipment 200 can recognize that the RACH resource is repeatedly placed. For example, as illustrated in FIG. 3, if the initial index and the number of repetitions of a RACH resource are received from base station 100, user equipment 200 can select any of the RACH resources from among the RACH resources that are repeatedly placed to transmit a preamble, or it can select multiple RACH resources to transmit a preamble. For example, as illustrated in FIG.5. In the case where the RACH resource is repeatedly placed from end to beginning, user equipment 200 can select one of the RACH resources from among the RACH resources that are repeatedly placed from end to beginning to transmit a preamble, or it can select multiple RACH resources to transmit a preamble.

[052] Furthermore, as illustrated in FIG. 7, in the case of receiving the relative position with respect to an SS block in a slot, the user equipment 200 recognizes the position of the RACH feature of the SS block, to transmit a preamble in the corresponding OFDM symbol. Also in this case, in the case where the RACH feature is placed repeatedly, the equipment Petition 870190138225, dated 12 / 23 / 2019, pp. 119 / 137 User 200 (17 / 31) can select one of the RACH resources from among the RACH resources that are repeatedly placed to transmit a preamble, or can select multiple RACH resources to transmit a preamble.

[053] Furthermore, in the case where a preamble format to be used to transmit a preamble is designated by the index or similar of the base station preamble format 100, user equipment 200 transmits a preamble using the designated preamble format.

[054] In addition, if the position of a slot in which a RACH resource is placed is received from base station 100, user equipment 200 transmits a preamble in accordance with the allocation information of the RACH resource in the slot in which the RACH resource is placed. <Composição funcional da estação base>

[055] FIG. 9 is a block diagram illustrating an example of a functional configuration of base station 100; Base station 100 includes a transmitter 110, a receiver 120, a configuration information manager 130, and a random access controller 140. The functional configuration illustrated in FIG. 9 is merely an example. Provided that operations according to the present embodiment can be performed, the names of the functional segments and units can be replaced with any name.

[056] Transmitter 110 is configured to generate a signal at a lower layer from information at an upper layer, in order to transmit the signal wirelessly. Receiver 120 is configured to wirelessly receive various types of signals, in order to obtain information at an upper layer from the received signals.

[057] The configuration information manager 130 stores configuration information to be defined in advance, determines the Petition 870190138225, dated 12 / 23 / 2019, pp. 120 / 137 18 / 31 configuration information to be set on user equipment 200 dynamically and / or semi-statically (allocation information for a RACH resource in a slot, allocation information designating the position of a slot in which the RACH resource is placed, any of the configuration information items used in the mode and similar), and maintains the information. The configuration information manager 130 transfers the configuration information to be set on user equipment 200 dynamically and / or semi-statically to transmitter 110, and causes transmitter 110 to transmit the configuration information.

[058] Random access controller 140 manages random access steps performed with user equipment 200. Random access controller 140 causes transmitter 110 to transmit a RAR if it receives a preamble from user equipment 200, and causes transmitter 110 to transmit an RRC Connection Definition if it receives an RRC Connection Request. <Configuração funcional do equipamento de usuário>

[059] FIG. 10 is a block diagram illustrating an example of a functional configuration of user equipment 200. User equipment 200 includes a transmitter 210, a receiver 220, a configuration information manager 230, and a random access controller 240. The functional configuration illustrated in FIG. 10 is merely an example. Provided that operations according to the present embodiment can be performed, the names of the functional segments and units may be replaced by any name.

[060] Transmitter 210 is configured to generate a signal at a lower layer from information at an upper layer, to Petition 870190138225, dated 12 / 23 / 2019, pp. 121 / 137 19 / 31 transmit the signal wirelessly. Transmitter 210 transmits a preamble based on configuration information stored in configuration information manager 230, which will be described below. Receiver 220 is configured to wirelessly receive various types of signals, to obtain information at a higher layer from the received signals. Receiver 220 receives configuration information from base station 100 or similar (information allocating a RACH resource to a slot, information designating the position of a slot in which the RACH resource is placed, any of the configuration information items used in the mode, and the like).

[061] The 230 configuration information manager stores configuration information to be defined in advance, and stores configuration information to be defined from the 100 base station dynamically and / or semi-statically (allocation information for a RACH resource in a slot, allocation information designating the position of a slot in which the RACH resource is placed, any of the configuration information items used in the mode, and similar). Note that the configuration information that can be managed in the 230 configuration information manager includes not only configuration information to be defined from the 100 base station or similar, but also configuration information previously defined in the specification.

[062] Random access controller 240 manages random access steps performed with base station 100. When user equipment 200 establishes a connection or resynchronizes with base station 100 to initiate transmission or handover, random access controller 240 causes transmitter 210 to transmit a selected preamble. Petition 870190138225, dated 12 / 23 / 2019, pages 122 / 137 20 / 31 randomly selected from multiple preambles. Furthermore, after transmitting a preamble and not receiving a RAR (Return Access Request) as response information, for example, within a period referred to as the RAR window, random access controller 240 causes transmitter 210 to retransmit the preamble. In the case of receiving a RAR from base station 100, random access controller 240 causes transmitter 210 to transmit a Connection Request (RRC). <Configuração de hardware >

[063] Note that a block diagram used to describe the above embodiment illustrates blocks in units of functions. These functional blocks (components) can be implemented in any arbitrary combinations of hardware and / or software. Furthermore, a method for implementing each functional block is not specifically limited. In other words, each functional block can be implemented by a single device that is physically and / or logically combined, or it can be implemented by multiple devices directly and / or indirectly (e.g., wired and / or wirelessly) connecting the multiple physically and / or logically separated devices.

[064] For example, the base station, user equipment, or the like according to an embodiment of the present invention may function as a computer to execute a random access method process according to the present invention. FIG. 11 is a diagram illustrating an example of a hardware configuration of a wireless communication device such as base station 100 or user equipment 200 according to an embodiment of the present invention. The base station 100 and user equipment 200 described above may be physically configured as a computer device including a processor. Petition 870190138225, dated 12 / 23 / 2019, pages 123 / 137 21 / 31 1001, a memory 1002, a storage 1003, a communication unit 1004, an input unit 1005, an output unit 1006, and a bus 1007.

[065] Note that in the following description, the term apparatus may be replaced by a circuit, a device, a unit, or the like. The hardware configuration of base station 100 and user equipment 200 may be configured to include one or more of the devices illustrated in the figures, or may be configured to exclude some of the devices.

[066] Each function of the base station 100 and the user equipment 200 can be implemented by loading predetermined software (a program) onto the hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs operations to control communication by the communication unit 1004 and / or reading and / or writing data in memory 1002 and storage 1003.

[067] Processor 1001 controls the entire computer, for example, running an operating system. Processor 1001 may consist of a central processing unit (CPU) including an interface with peripheral devices, a control unit, an arithmetic and logic unit, and registers. For example, the transmitter 110, the receiver 120, the configuration information manager 130, and the random access controller 140 of base station 100 and the transmitter 210, the receiver 220, the configuration information manager 230, and the random access controller 240 of user equipment 200, and similar devices described above may be implemented by processor 1001.

[068] In addition, processor 1001 reads a program (a program code), a software module, or data from storage 1003 and / or from Petition 870190138225, dated 12 / 23 / 2019, pages 124 / 137 22 / 31 communication unit 1004 in memory 1002, and executes various processes accordingly. As for the program, a program is used that causes the computer to execute at least part of the operations described in the above modalities. For example, the transmitter 110, the receiver 120, the configuration information manager 130, and the random access controller 140 of the base station 100, and the transmitter 210, the receiver 220, the configuration information manager 230, and the random access controller 240 of the user equipment 200 can be implemented by a control program that is stored in memory 1002 and executed by processor 1001, and the other functional blocks can also be implemented similarly. Although the various processes above have been described as being executed by the single processor 1001, the processes can be executed by multiple processors 1001 simultaneously or sequentially.The 1001 processor can be implemented using one or more chips. Note that the program can be transmitted over a network via a telecommunications channel.

[069] Memory 1002 is a computer-readable recording medium, which may consist of, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). Memory 1002 may be referred to as a register, a cache, main memory (a primary storage device), and the like. Memory 1002 may store a program (program code), a software module, and the like that may be executed to implement the random access method according to an embodiment of the present invention.

[070] Storage 1003 is a readable recording medium Petition 870190138225, dated 12 / 23 / 2019, pages 125 / 137 23 / 31 computer, which may consist of, for example, at least one optical disc, such as a CD-ROM (Compact Disc ROM), a hard disk drive, a floppy disk, a magneto-optical disc (for example, a compact disc, a digital versatile disc or a Blu-ray disc (trademark)), a smartcard, a flash memory (for example, a card, a stick, or a key drive), a floppy disk (trademark) and a magnetic strip. Storage 1003 may be referred to as an auxiliary storage device. The storage medium described above may be, for example, a database, a server or any other suitable medium that includes memory 1002 and / or storage 1003.

[071] The 1004 communication unit is a hardware (a transceiver device) for performing communication between computers over a wired and / or wireless network, which may be referred to as, for example, a network device, a network controller, a network card, or a communication module. For example, the 110 transmitter, the 120 receiver, the 210 transmitter, the 220 receiver, and similar devices described above may be implemented in the 1004 communication device.

[072] Input unit 1005 is an input device for receiving input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, and a sensor). Output unit 1006 is an output device for sending output to the outside (e.g., a display, a speaker, and an LED lamp). Note that input unit 1005 and output unit 1006 can be configured as an integrated unit (e.g., a touch panel).

[073] In addition, devices such as the processor 1001 and / or the memory 1002 are connected via a bus 1007 to communicate information. The bus 1007 may consist of a single Petition 870190138225, dated 12 / 23 / 2019, pages 126 / 137 24 / 31 bus or it can be made up of buses that are different between devices.

[074] In addition, base station 100 and user equipment 200 can be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and some or all of the functional blocks can be implemented by the hardware. For example, processor 1001 can be implemented by at least one of these hardware components. <Efeitos de modalidade da presente invenção>

[075] According to one embodiment of the present invention, it is possible to allocate a RACH resource by OFDM symbol units in a slot. Furthermore, it is possible to allocate a RACH resource in an appropriate position depending on the use cases and the like, and for example, it is possible to place downlink control information, an SS block, and the like in a slot in which a RACH resource is allocated. For example, even in the case where multiple SS (Synchronization Signal) blocks are placed depending on the assumed number of beams on the base station side, it is possible to reduce random access delay by placing RACH resources in the same slots as the SS blocks.

[076] In the case where a RACH resource is allocated by the initial index of the RACH resource, it is possible to flexibly allocate the RACH resource in a slot. Furthermore, in the case of allocating a RACH resource from the end of a slot, it is possible to avoid downlink control information, an OFDM symbol, an SS block, and similar information required for the transmission of other downlink data, and it is also possible to reduce signaling overhead compared to an indication case. Petition 870190138225, dated 12 / 23 / 2019, pages 127 / 137 25 / 31 of the initial index. Furthermore, in the case of allocating a RACH resource by its relative position with respect to an SS block, it is possible to reduce signaling overhead in cases where a RACH resource corresponding to each SS block is required, such as when analog beamforming is used at the base station.

[077] Furthermore, even if the RACH resource is repeatedly placed in a slot and the same preamble is selected by multiple units of the user equipment, it is possible to avoid preamble collision in the case where different RACH resources are used.

[078] Furthermore, using a preamble format, it is possible to define in advance an appropriate RACH resource placement according to the preamble format, depending on a hypothetical use case, which allows efficiently indicating an appropriate placement pattern of a RACH resource from base station 100 to user equipment 200. For example, in the case where downlink control information is placed at the beginning of several OFDM symbols, it is possible to define in advance a placement pattern of a RACH resource that avoids the first several OFDM symbols, which allows user equipment 200 to recognize the appropriate placement pattern of the RACH resource, according to the preamble format indicated to user equipment 200 from base station 100. <Notas suplementares>

[079] Each of the application modes and examples described in this descriptive report can be applied to a system using LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA (registered trademark), GSM (registered trademark), CDMA 2000, UMB (Ultra Mobile Broadband), IEEE 802.11 Petition 870190138225, dated 12 / 23 / 2019, pages 128 / 137 26 / 31 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra Wideband), Bluetooth (registered trademark), any other appropriate system, or a next-generation system enhanced based on these.

[080] The terms system and network used in this descriptive report may be used interchangeably.

[081] Certain operations described as being performed by a base station in this descriptive report may be performed by its superior node in some cases. In a network that includes a base station and one or more network nodes, it is obvious that various operations performed for communication with terminals may be performed by the base station and / or by network nodes other than the base station (for example, an MME or an S-SW may be considered, but not limited to these). Although a case has been exemplified where there is a single network node other than the base station, there may be combinations of several other network nodes (for example, MMEs and S-GWs).

[082] Information or similar data can be transmitted from an upper layer (or a lower layer) to a lower layer (or an upper layer). Such information can be transmitted and transmitted through multiple network nodes.

[083] Information or similar input and output, as such, may be stored in a specific location (e.g., memory) or may be managed in a management table. Information or similar input and output, as such, may be overwritten, updated, or added to. Output information or similar may be deleted. Input information or similar may be transmitted to another device.

[084] The indication of information is not limited to being performed Petition 870190138225, dated 12 / 23 / 2019, pages 129 / 137 27 / 31 by the methods of the application modalities and examples described in this descriptive report and may be performed by other methods. For example, information indication may be performed by physical layer signaling (e.g., DCI (Downlink Control Information) and UCI (Uplink Control Information)), upper layer signaling (e.g., RRC (Radio Resource Control) signaling), MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block) and SIB (System Information Block)), or any other signaling or combination thereof. Furthermore, RRC signaling may be referred to as an RRC message, which may be, for example, an RRC connection definition message or an RRC connection reconfiguration message, or similar.

[085] A determination can be made based on a value represented by a bit (0 or 1), a boolean value (true or false), or numerical comparison (for example, comparison with a predetermined value).

[086] Software should be broadly interpreted as meaning an instruction, a set of instructions, a code, a code segment, a program code, a program, a subprogram, a software module, an application, a software application, a software package, a routine, a subroutine, an object, an executable file, a thread of execution, a procedure, a function, or the like, regardless of whether it is referred to as software, firmware, middleware, microcode, hardware description language, or any other term.

[087] Furthermore, such software, instructions or similar may be transmitted and received through a transmission medium. For example, if the software is transmitted from a website, server or any other Petition 870190138225, dated 12 / 23 / 2019, pages 130 / 137 28 / 31 remote source using a wired technology including a coaxial cable, a fiber optic cable, a twisted pair and a digital subscriber line (DSL) and / or wireless technology including communication based on infrared rays, radio waves and microwaves, these wired and / or wireless technologies should be considered as included in the definition of a transmission medium.

[088] Information, signals or similar items described in this descriptive report may be represented using any of several different technologies. For example, data, an instruction, a command, information, a signal, a bit, a symbol, a chip and similar items mentioned throughout the description above may be represented by a voltage, a current, an electromagnetic wave, a magnetic field, a magnetic particle, an optical field, a photon or any combination thereof.

[089] Note that each of the terms described in this descriptive report and / or a term that may be necessary to understand this descriptive report may be replaced by a term having the same or similar meaning. For example, a channel and / or a symbol may be a signal. In addition, a signal may be a message. Furthermore, a component carrier (CC) may be referred to as carrier frequency, a cell, or similar.

[090] In addition, information, a parameter and the like described in this descriptive report may be represented by an absolute value, a relative value in relation to a predetermined value or any other corresponding information item. For example, a wireless feature may be designated by an index.

[091] A name used for a parameter as described above should not be considered restrictive in any respect. However, in some cases, Petition 870190138225, dated 12 / 23 / 2019, pages 131 / 137 29 / 31 An expression, a formula, or the like using such parameters may have a representation different from that explicitly disclosed in this descriptive report. As various channels (e.g., PUCCH, PDCCH, and the like) and intelligence items (e.g., TPC and the like) may be distinguished with any favorable names, the names assigned to these various channels and intelligence items should not be considered restrictive in any respect.

[092] The term determine used in this descriptive report can cover several operations. For example, determine can encompass the determination or decision made with calculation, computation, processing, derivation, investigation, research (e.g., searching in a table, database, or any other data structure), and verification. Furthermore, determine can encompass the determination or decision made with receiving (e.g., receiving information), transmitting (e.g., transmitting information), inserting, issuing, and accessing (e.g., accessing data in a memory). Additionally, determine can encompass the determination or decision made with solving, selecting, choosing, establishing, comparing, and the like. In other words, determine can encompass the determination or decision made with an operation.

[093] The expression "based on" used in this descriptive report does not mean "based only on," unless otherwise specified. In other words, the expression "based on" means both "based only on" and "based on at least."

[094] Any reference to elements specified with the words first, second, and so forth used in this descriptive report does not limit the quantity or sequence of these elements in general. These words may be used in this descriptive report as a Petition 870190138225, dated 12 / 23 / 2019, pages 132 / 137 30 / 31 convenient way to distinguish multiple elements from each other. Therefore, a reference to the first and second elements does not mean that only those two elements are assumed in the context, or that the first element should be considered as preceding the second element in some way.

[095] The words include, including, and variations thereof are used to imply comprehensiveness as intended by including, provided that these terms are used in this descriptive report and in the claims. Furthermore, the term or used in this descriptive report and in the claims is not intended to mean exclusive OR.

[096] The processing steps, sequences, flowcharts and similar elements of the application methods and examples described in this descriptive report may have an altered sequence of steps, provided that no contradiction occurs. For example, in each of the methods described in this descriptive report, several steps are simply presented in an exemplary order and are not limited to the particular sequence presented.

[097] Each of the application modes and examples described in this descriptive report can be used alone, in combination with the others, or switched to another during execution. Furthermore, the indication of predetermined information (e.g., indication of something being X) is not limited to an explicit indication and can be performed implicitly (e.g., by not indicating the predetermined information).

[098] As above, the present invention has been described in detail and it is evident to those skilled in the art that the present invention is not limited to the embodiments described in this descriptive report. The present invention can be implemented by an embodiment with modifications and variations without departing from the intent and scope of the present invention as implied by the claims. As such, the description in the present Petition 870190138225, dated 12 / 23 / 2019, pages 133 / 137 The 31 / 31 descriptive report is intended to be an exemplary description and in no way restricts the present invention. [Description of Reference Numerals] 100 Base Station 110 Transmitter 120 Receiver 130 Configuration Information Manager 140 Random Access Controller 200 User Equipment 210 Transmitter 220 Receiver 230 Configuration Information Manager 240 Random Access Controller Petition 870190138225, dated 12 / 23 / 2019, pages 134 / 137

Claims

1 / 2 CLAIMS 1. Terminal (200) characterized in that it comprises: a receiver (220) that receives configuration information for random access; a controller (240) that determines an initial index of a random access resource in one or more slots and a preamble format based on the configuration information; and a transmitter (210) that generates a sequence of a preamble using the preamble format determined by the controller (220) and transmits the preamble in a resource from an OFDM symbol corresponding to the initial index to the end of one or more slots.

2. Terminal (200), according to claim 1, characterized in that the controller (240) determines, based on configuration information, a plurality of random access resources that are repeatedly placed on the resource from the OFDM symbol corresponding to the initial index; and the transmitter (210) transmits the preamble using at least one of the plurality of random access resources.

3. Preamble transmission method characterized in that it comprises: receiving configuration information for random access; determining an initial index of a random access resource in one or more slots and a preamble format based on the configuration information; and generating a preamble sequence using the determined preamble format and transmitting the preamble on a resource from an OFDM symbol corresponding to the initial index to the end of one or more slots. Petition 870260063497, dated 06 / 26 / 2026, p. 14 / 15 2 / 2 Petition 870260063497, dated 06 / 26 / 2026, p. 15 / 15

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