JP6833910B2 - Access node and beam forming methods for receiving and transmitting signals in wireless communication networks - Google Patents

Description

Embodiments here relate to server radio nodes, client radio nodes, wireless communication networks, and methods in them. Specifically, they relate to beam formation at a server radio node for detecting signals from a client radio node in a wireless communication network.

For wireless communication networks or systems, such as MMW (Millimeter-Wave) wireless systems, operating at high frequencies of 30-300 GHz, to meet the rapidly expanding bandwidth requirements by enabling multi-gigabit per second speeds. It is emerging as a promising technology. For example, LTE (Long Term Evolution) oriented to the 5th generation (5G)
) Or UDN (Ultra-Dense-Networks) is most likely to be deployed in the MMW band.
At such high frequencies, multiple antennas may be available in the transmitter, receiver, or both. Beam formation is a very important feature in MMW systems for the purpose of compensating for the large propagation loss that typically occurs. Beam formation is a signal processing technique used for the transmission or reception of directional signals. This is achieved by combining the antenna elements in the phased array in the form that signals of a particular angle experience constructive interference while other signals experience destructive interference. Beam formation can be used on both the transmitting and receiving sides for the purpose of achieving spatial selectivity. The degree of improvement compared to omnidirectional reception / transmission is known as beam forming gain. If multiple antennas are available at the transmitter, receiver, or both, it is therefore possible to apply an efficient beam pattern to those antennas in order to better utilize the spatial selectivity of the corresponding wireless channel. is important.

Communication devices such as user devices (UEs) that operate in wireless communication networks or systems are also known as, for example, wireless terminals, mobile terminals, and / or mobile stations, and are hereafter referred to as client wireless nodes. The client radio node
Generally, wireless communication is possible in a wireless communication network / system having a plurality of networks having access nodes. Examples of these multiple networks are wireless local networks, such as wireless local area networks (WLANs) and wireless personal area networks (WPANs) with access points, as well as 2nd / 3rd generation (2G / 3G) network access nodes. 3, 3G LTE network access node, and WiMAX (Worldwide interoperab)
ility for Microwave Access) A cellular communication network with network access nodes and the like. Communication is, for example, between two client radio nodes, or 1
It can be run between one client radio node and various access nodes or access points.

Once the location of the client radio node is known to the network or system, beam formation can be applied to the physical channels used to transmit data to the client radio node. For broadcast transmission of system information, paging, common reference signals, synchronization signals, etc. for client radio nodes whose location is unknown to the network or client radio nodes whose location is unknown to the network
The use of beam formation can be more difficult. The application of simple beam formation is not possible because it is not known in which direction the beam formation should be applied. One common method of addressing this problem is to transmit those signals multiple times, not just once, each time in different directions using beam formation. This procedure is also called a beam sweep. An example of a system that applies a beam sweep is IEEE 802.11
ad, a Wi-Fi standard that operates in the unlicensed 60 GHz band.

The wireless communication network covers a geographical area divided into a plurality of cell areas, and each cell area is an access node (AN), which is hereinafter referred to as a server wireless node.
), Or a base station (BS), or an access point (AP). A wireless communication network may include multiple cells capable of supporting communication for multiple UEs, i.e. client radio nodes. The basic requirement for any wireless system is the possibility that the UE or client wireless node will require a connection setup, commonly referred to as random access (RA).

For the method of random access in the conventional LTE system, the server radio node detects the random access sequence by the omnidirectional reception direction. This is M
Not practical for MW systems. The reason is that large propagation losses occur in the high frequency band, and therefore reliable detection of random access signals is not possible without the use of beam formation. Considering the large number of antenna elements on the server radio node side, the detection of random access preambles in uplink transmission can be clearly adversely affected if the received beam forming gain is not effectively utilized.

WO20100027865 discloses a method for beam formation used for 802.11ad systems, in which a receive beam sweep is performed for each user equipment or client radio node, which is a few inconveniences. Make a profit. First, this method creates a large amount of overhead. To complete this receive beam sweep, for example, an N * M resource block is required, where N is the number of sweep beams at the server radio node and M is the number of client radio nodes. Such a receive beam sweep may even require the allocation of more resource blocks to limit the collision rate below a certain acceptable level. Second, this method causes interference. Such interference reduces the signal quality of other nodes, such as other server radio nodes or client radio nodes.

Therefore, an object of the embodiments herein is to provide an improved way for a server radio node to receive a random access request or any other signal from a client radio node in a wireless communication network.

According to the first aspect of the embodiment herein, this object is achieved by a method performed on a server radio node for receiving a signal from a client radio node in a wireless communication network. The server radio node determines a receiving time-spatial sweeping pattern for the server radio node, and based on the receiving time-spatial sweep pattern, sends at least one signal from the client radio node. Receive. The at least one signal is a transmitter spatiotemporal pattern (transmit) determined by the client radio node based on a predefined rule.
It is transmitted by the client radio node according to the ting time-spatial pattern).

According to a second aspect of the embodiment herein, this object is achieved by a method performed on a client radio node for transmitting a signal to a server radio node in a wireless communication network. The client radio node determines a transmitting side spatiotemporal pattern based on a predefined rule, and transmits at least one signal to the server radio node according to the determined transmitting side spatiotemporal pattern.

According to a third aspect of the embodiment herein, this object is achieved by a method in a wireless communication network for receiving and transmitting signals between a first radio node and a second radio node. Ru. The first radio node may be a server radio node, the second radio node may be a client radio node, or vice versa. The first radio node determines a receiving side spatiotemporal sweep pattern when operating as a server radio node. When operating as a client radio node, the second radio node determines a transmitting side spatiotemporal pattern based on a predefined rule. The second radio node transmits a signal according to the determined transmitting side spatiotemporal pattern. The first radio node detects the signal according to the defined receiver spatiotemporal sweep pattern of the first radio node, and when the signal is detected, responds to the second radio node. To send.

According to a fourth aspect of the embodiment herein, this object is achieved by a server radio node for receiving signals from a client radio node in a wireless communication network. The server radio node is configured to determine a receiving side spatiotemporal sweep pattern and receive at least one signal from the client radio node based on the receiving side spatiotemporal sweep pattern. The at least one signal is transmitted by the client radio node according to a transmitting side spatiotemporal pattern determined by the client radio node based on a predefined rule.

According to a fifth aspect of the embodiment herein, this object is achieved by a client radio node for transmitting a signal to a server radio node in a wireless communication network. The client radio node determines a transmitting side spatiotemporal pattern based on a predefined rule and transmits at least one signal to the server radio node according to the determined transmitting side spatiotemporal pattern. It is composed.

Since the receiving side spatiotemporal sweep pattern is predetermined for the server radio node and the transmitting side spatiotemporal pattern is determined by the client radio node based on the predefined rules, the spatiotemporal relationship between them is determined by the client radio node. The client radio node has at least one signal when the beam of the receiving spatiotemporal sweep pattern of the server radio node is directed to the area where the client radio node is located.
For example, a random access preamble can be sent. That is, by such a predetermined receiver spatiotemporal sweep pattern, the client radio node knows when the beam of the receiver spatiotemporal sweep pattern of the server radio node is directed toward the client radio node. This eliminates the need for the client radio node to repeatedly transmit a random access preamble when the receive beam of the server radio node is directed in the other direction. As a result, the number of iterations in the transmission of random access preambles, small amounts of data and reports from the client radio node side during the association or connection setup can be significantly reduced or avoided. This is 8
Compared to the receive beam sweep in the 02.11ad system, the overhead will be significantly reduced. As a result of the reduced overhead, interference is also reduced.

Thus, embodiments herein provide an improved method for server and client radio nodes using high gain beam formation in wireless communication networks. The embodiments here also increase and improve the capacity and signal quality of the wireless communication network.

Examples of embodiments here will be described in more detail with reference to the accompanying drawings including the following figures.

This is a scenario illustrating communication between a server wireless node and a client wireless node in a wireless communication network. It is a flowchart which draws the method in the server radio node by some possible embodiments. Fig. 3a shows an example of a beacon sweep pattern. Fig. Reference numeral 3b shows an example of a space-time sweep pattern on the receiving side. It is a flowchart which draws the method in a client radio node by a possible further embodiment. FIG. 6 is a block diagram illustrating a server / client radio node according to a possible further embodiment. It is a flowchart which draws the method in a wireless communication network by a possible further embodiment. An example of a beam-specific random access configuration for a server radio node is shown. An example of beacon information regarding a random access configuration is shown. An example of beam-specific beacon information for a random access configuration is shown.

FIG. 1 depicts an example of a wireless communication network 100 in which this embodiment can be implemented. The wireless communication network 100 includes a plurality of network access nodes, two of which are a server wireless node 110 and a client wireless node 120.
Is depicted in FIG. The server radio node 110 is an LTE network, any 3G
PP (3 ^rd Generation Partnership Project) cellular network, MWV network, Wimax network, WLAN / Wi-Fi, such as WPAN, in any wireless system or cellular network, capable of service to the client wireless node, a Node B, It can be a base station (BS), eNB, eNodeB, home node B, home eNodeB, access point, or any other network node. The client wireless node 120 can communicate over a wireless link in a wireless communication network, such as a wireless device, mobile wireless terminal or wireless terminal, mobile phone, computer with wireless capabilities, such as a laptop, personal digital assistant ( It can be a PDA), or a tablet computer, sometimes referred to as a fablet, a sensor or actuator with wireless capabilities, or any other wireless network unit. It should be noted that the term client radio node used in this document also includes other wireless devices such as machine-to-machine (M2M) devices, also referred to as machine-to-machine (MTC) devices. ..

The feature of the embodiment in which the server radio node receives or monitors a random access request / preamble from a plurality of client radio nodes, or any other signal, is that the receiving side spatiotemporal sweep pattern is the server radio. Pre-acquired or determined as pre-defined or pre-determined for node 110, and client radio node 1
The client radio node transmits a random access preamble when the beam of the receiving side spatiotemporal sweep pattern of the server radio node 110 is directed towards the area where 20 is located. That is, such a predefined receiver spatiotemporal sweep pattern allows the client radio node to know when the beam of the receiver spatiotemporal sweep pattern of the server radio node is directed towards the client radio node. This eliminates the need for the client radio node to repeatedly transmit a random access preamble when the server radio node directs its beam in the other direction.

Further, such a predefined beam forming method based on the receiving side spatiotemporal sweep pattern may be used to receive other control information and data information from the client radio node 120. For example, the beam forming method includes a scheduling request, a buffer status report, in addition to a conflict message, a tracking area update, etc. from the client radio node, which are hereinafter referred to as signals transmitted from the client radio node to the server radio node. And a small amount of data, may be used to receive.

Next, with reference to FIG. 2, some possible embodiments of a method performed on the server radio node 110 for receiving a signal from the client radio node 120 in the wireless communication network 100 will be described. .. This method includes the following actions:

Action 201
The server radio node 110 determines the receiving side spatiotemporal sweep pattern. The server radio node 110, in some embodiments, receives a receiving spatiotemporal sweep pattern from another node in the network, or is otherwise configured with the receiving spatiotemporal sweep pattern. , A receiver spatiotemporal sweep pattern may be determined, while, in certain embodiments, this determination is information available to the server node 110 at the server radio node 110, or so. If not, it may include defining a receiving side spatiotemporal sweep pattern using the information available by the server radio node 110.

Action 201a
According to one embodiment, the server radio node 110 determines the receiving side spatiotemporal sweep pattern based on the beacon sweep pattern. This can be done by determining the receiving side spatiotemporal sweep pattern with a certain index offset relative to the index of the beacon beam of the beacon sweep pattern. A beacon sweep may be performed by the server radio node 110 in the beacon transmission interval (BTI), and in the BTI, the server radio node 110 may have a plurality of DMGs (Directional Multi) to join the new client radio node to the wireless communication network 100. -G
igabit) Beacons can run in different directions. That is, the server radio node broadcasts the system information via the beacon beam transmitted according to the beacon sweep pattern.

FIG. 3 shows an example of a receiving side spatiotemporal sweep pattern with an index offset of 2 with respect to the beacon beam of the beacon sweep pattern. Figure 3 shows this in 2
Two parts, namely Fig. 3a and Fig. Illustrated in 3b. Fig. Reference numeral 3a shows a beacon sweep pattern, in which the left side shows beacon beams having index numbers 0, 1, ... 7 which are directed in different directions, and the right side shows beacon beams which have different times. The transmission time for the beacon beam having index numbers 0, 1, ... 7 transmitted to is shown. Fig. Reference numeral 3b indicates a receiving side spatiotemporal sweep pattern, and the receiving beam 2 in the receiving side spatiotemporal sweep pattern corresponds to the beacon beam 0 in the beacon sweep pattern, that is, in the receiving side spatiotemporal sweep pattern. It can be visually recognized that the reception beam 2 has an index offset of 2 with respect to the index of the beacon beam 0. Such a mapping between the beacon sweep pattern and the receiving side spatiotemporal sweep pattern, that is, the above index offset requires signaling from the server radio node 110 in order to notify the client radio node 120 of the index offset. It may be predefined so that it does not.
Alternatively, the index offset may be directed to the client radio node 120 via broadcast or dedicated signaling.

Action 201b
According to another embodiment, the server radio node 110 determines a set of receiver spatiotemporal sweep pattern candidates. In this scheme, the server radio node 110 may select one receiving side spatiotemporal sweep pattern from a set of receiving side spatiotemporal sweep pattern candidates.

Action 202
According to some embodiments, the server radio node 110 defines or determines a set of receiver spatiotemporal sweep pattern candidates in the above action 201b, and the server radio node 110, in some embodiments, is a receiver. Further actions may be taken to notify the client radio node 120 of the selected receiver spatiotemporal sweep pattern from the set of spatiotemporal sweep pattern candidates.

According to one embodiment, the server radio node transmits an index of the selected receiver spatiotemporal sweep pattern to the client radio node 120. This can be done via broadcast or dedicated signaling.

Action 203
The server radio node 110 receives at least one signal from the client radio node 120 based on the receiving side spatiotemporal sweep pattern. At least one signal is transmitted by the client radio node 120 according to a transmitting side spatiotemporal pattern determined by the client radio node 120 based on a predefined rule. At least one signal from the client radio node 120 is thus detected and / or received by the server radio node 110 using a receiving spatiotemporal sweep pattern.

According to one embodiment, the predefined rules are based on the receiving side spatiotemporal sweep pattern of the server radio node 110. In action 201, since the receiving side spatiotemporal sweep pattern of the server radio node is predefined or predetermined, the transmitting side spatiotemporal pattern of the client radio node 120 becomes the receiving side spatiotemporal sweep pattern of the server radio node 110. Can be determined on the basis. Therefore, the client radio node 120 can understand the spatiotemporal relationship between the receiving side spatiotemporal sweep pattern of the server radio node and the transmitting side spatiotemporal pattern of the client radio node 120.

According to one embodiment, the predefined rules are based on the timing at which the beam of the receiving side spatiotemporal sweep pattern of the server radio node is directed towards the area where the client radio node 120 is located. In this method, each time the client radio node 120 transmits a signal according to the client radio node 120 and the determined transmitting side spatiotemporal pattern, the beam of the receiving side spatiotemporal sweep pattern of the server radio node 110 is generated by the client radio node. Directed in the direction.

According to one embodiment, the predefined rule is that for each beam of the transmitting side spatiotemporal pattern of the client radio node 120, the transmitting side spatiotemporal pattern is applied to the server on the corresponding beacon beam of the beacon sweep pattern. It is based on instructing the client radio node 120 by the radio node 110. In other words, the information regarding the transmitting side spatiotemporal pattern is transmitted by the server radio node 110 to the client radio node 120 by instructing the information about each beam of the transmitting side spatiotemporal pattern on the corresponding beacon beam of the beacon sweep pattern. Instructed. In this scheme, the client node 120 can determine when to transmit an RA preamble or signal by one or more of the strongest beacon beams it detects. This instruction is beam-specific, eg, in one beacon beam of a beacon sweep pattern, where the server radio node 110 directs only the corresponding beam of the transmitting side spatiotemporal pattern for the client radio node 120. can do.

Action 204
According to some embodiments, the server radio node 110 to the client radio node 120 so that if at least one signal is received and detected, the client radio node 120 does not have to retransmit the signal. Send a response.

Next, with reference to FIG. 4, some possible embodiments of the method performed on the client radio node 120 for transmitting signals to the server radio node 110 in the wireless communication network 100 will be described. .. The method in this example includes the following actions:

Action 401
The client radio node 120 determines the transmitting side spatiotemporal pattern based on a predefined rule.

The predefined rules may be implemented according to any of the following embodiments:
According to one embodiment, the client radio node 120 is a server radio node 11.
The transmitting side spatiotemporal pattern is determined based on the receiving side spatiotemporal sweep pattern of 0.
According to one embodiment, the client radio node 120 is a server radio node 11.
The transmitting side spatiotemporal pattern is determined based on the information instructed to the client radio node 120 by 0. The server radio node 110 instructs the client radio node 120 on the corresponding beacon beam of the beacon sweep pattern with information about the transmission side spatio-temporal pattern for each beam of the transmission side spatio-temporal pattern of the client radio node 120. obtain.
According to one embodiment, the client radio node 120 determines the preferred beacon beam index from the beacon sweep pattern. The preferred beacon beam may be the best beacon beam having the strongest signal strength detected by the client radio node 120. The client node 120 then determines the sender spatiotemporal pattern based on the best beacon beam index.
According to one embodiment, the client radio node 120 is on the transmitting side based on the timing at which the beam of the receiving side spatiotemporal sweep pattern of the server radio node 110 is directed towards the area where the client radio node 110 is located. Determine the spatiotemporal pattern. In a further embodiment, the client radio node 120 determines the number of repeated transmissions in the sender spatiotemporal pattern for the client radio node 120. This means that the client node 120 transmits at least one signal at a certain time according to a determined transmitting side spatiotemporal pattern and repeats the transmission a determined number of times.

Action 402
The client radio node 120 transmits at least one signal to the server radio node 110 according to the determined transmitting side spatiotemporal pattern.

According to one embodiment, the client radio node 120 is a server at a time when the beam of the receiver spatio-temporal sweep pattern of the server radio node 110 is directed towards the area where the client radio node (120) is located. At least one signal is transmitted to the radio node 110.

According to one embodiment, the client radio node 120 iteratively determines the beam occurrence of the receiver spatiotemporal sweep pattern of the server node 110.
At least one signal is transmitted at times and at the time of beam occurrence spatially adjacent to the determined beam occurrence. Of the receiving side spatiotemporal sweep pattern of the server radio node 110
The determined beam-occurring beam may have some index offset relative to the preferred beacon beam index. Then, the beam generated beam spatially adjacent to the determined beam generation has an index offset of +1 and an index offset of -1 with respect to the index offset of the determined beam generation beam, respectively. This is explained further with examples in the sections below.

Action 403
For example, in the case where there is a mismatch between the receiving direction and the transmitting direction, that is, between the receiving beam and the transmitting beam of the server radio node 110, the client radio node 120
May not get any response from the server node 110 for at least one signal transmitted using the determined spatiotemporal transmitter pattern. This lack of response can be the result of a mismatch, because the server radio node 110 detects at least one signal transmitted from the client radio node 120 using the determined spatiotemporal sender pattern. This is because there may be things that cannot be done. The client radio 120 may then, in some embodiments, retransmit at least one signal to the server radio node 110 according to a fall-back transmit side spatiotemporal pattern.

According to one embodiment, the number of repeated transmissions of at least one signal in the preliminary spatiotemporal transmitter pattern is at least 1 in the determined transmitter spatiotemporal pattern.
Greater than the number of repeated transmissions of a signal.

According to one embodiment, the spare spatiotemporal transmitter pattern is configured by the server radio node 110 based on a spatial mismatch between the receive beam and the transmit beam of the server radio node 110. This configuration can be done via broadcast in some embodiments.

This preliminary procedure and the preliminary transmitting side spatiotemporal pattern may be defined in advance.

According to the embodiment here, the client radio node 120 to the server radio node 11
At least one signal transmitted to zero can be one or more of random access preambles, control or data information, scheduling requests, buffer status reports, contention messages, tracking area update information, and the like.

Next, for the purpose of further explaining some of the above embodiments, an example in which at least one signal transmitted by the client radio node is a random access preamble will be given, and the example will be described with reference to FIG. To do. As shown in FIG. 3, the receiving side spatiotemporal sweep pattern has an index offset of 2 with respect to the index of the beacon beam. The index offset may be predefined or predetermined so that the client radio node 120 knows the index offset in advance.
Alternatively, the index offset may be directed to the client radio node 120 via broadcast or dedicated signaling. If the client radio node 120 determines that the preferred or "best" beacon beam is the beacon beam 3, the client radio node 120 receives the server radio node 110 pointing towards its location for random access preamble detection. It can be determined that the beam will be the reception beam of the fifth reception beam occurrence during the reception beam sweep period. As a result, the client radio node 120 may transmit the random access preamble only when the fifth receive beam occurs. This is illustrated through the mapping between the left and center columns of Table 1. Table 1 is a mapping table between the index of the best beacon beam and the index of the transmit beam in the transmitting spatiotemporal pattern of the client radio node 120, where the left column shows the index of the best beacon beam. The middle column shows the index of the best uplink (UL) transmit (TX) beam only in the sender spatiotemporal pattern of the client radio node 120, and the right column shows the best UL TX in the transmit spatiotemporal pattern. In addition to the beam (number highlighted in bold), the index of the spatially adjacent UL TX beam is shown. In this method, in the client radio node 120, the reception beam of the server radio node 110 is the client radio node 120.
Sends a random access preamble only once when directed directly to. Therefore,
The transmission of the random access preamble is performed only once instead of the eight iterations as in 802.11AD, i.e. a 7/8 overhead reduction is achieved.

In another example of the embodiment here, the client radio node 120 is at least one.
One signal, such as a random access preamble, may be iteratively transmitted at the time of occurrence of the determined receive beam and at the time of occurrence of the receive beam spatially adjacent to the determined reception beam occurrence. Thereby, regarding the random access preamble detection, when there is a directional deviation between the beacon beam and the corresponding determined reception beam, the false detection rate of the random access preamble can be reduced. According to the receiving side spatiotemporal sweep pattern exemplified in FIG. 3, as described above, when the client radio node 120 determines that the best beacon beam is the beacon beam 3, the client radio node 1
20 can determine that the receive beam of the server radio node 110 pointing in the direction of its location will be the beam of occurrence of the fifth receive beam. Then, the reception beam spatially adjacent to the reception beam whose occurrence of the fifth reception beam is determined becomes the reception beam of the occurrence of the fourth and sixth reception beams, that is, the reception beam which is spatially adjacent is determined. It has an index offset of +1 and an index offset of -1 with respect to the index offset of the received beam. As a result, the client radio node 120 may iteratively transmit a random access preamble during the occurrence of the fourth to sixth received beams. This is illustrated through the mapping between the left and right columns of Table 1. In this technique, the transmission of the random access preamble is repeated only 3 times instead of 8 iterations as in 802.11AD, i.e. a 5/8 overhead reduction is achieved.

Server radio node 110 and client to perform actions on the method at server radio node 110 and client radio node 120 to receive and transmit signals in the wireless communication network 100 in connection with FIGS. 2 and 4. The radio node 120 may include a circuit or module as depicted in FIG. Server wireless node 11
0 and the client radio node 120 may have essentially the same structure, respectively, the receive module 502, the decision module 504, the transmit module 506, the processor 508, respectively.
And similar circuits, units, or modules such as memory 510, where each module may be configured in various ways, depending on the unique function performed.

The server radio node 110 is configured, for example, by the determination module 504 to determine the receiving side spatiotemporal sweep pattern for the server radio node (110). The server radio node 110 is further configured, for example, by the receiving module 502 to receive at least one signal from the client radio node 120 based on the receiving side spatiotemporal sweep pattern. At least one signal is transmitted by the client radio node 120 according to a transmitting side spatiotemporal pattern determined by the client radio node 120 based on a predefined rule. The server radio node 110 is therefore configured to detect and / or receive at least one signal from the client radio node 120 using the receiver spatiotemporal sweep pattern. The server radio node 110 is further configured to transmit a response to the client radio node 120, for example, by means of a transmission module 506.

The client radio node 120 is configured, for example, by the determination module 504 to determine the transmitting side spatiotemporal pattern based on a predefined rule. The client radio node 120 is further configured, for example, by a transmission module 506 to transmit at least one signal to the server radio node 110 according to a determined sender spatiotemporal pattern.

Next, with reference to FIG. 6, an example of an embodiment of the method in the wireless communication network 100 for receiving and transmitting a signal between the first wireless node 110 and the second wireless node 120 will be described. To do. The first node 110 and the second node 120 are access nodes, and each node can be a server radio node or a client radio node. The method in this example includes the following actions:

Action 601
Assuming that the first radio node 110 operates as a server radio node for receiving signals, a receiving side spatiotemporal sweep pattern is defined or determined for the first radio node 110. The receiving spatiotemporal sweep pattern can be determined at the first radio node 110.

Action 602
Assuming that the second radio node 120 operates as a client radio node for transmitting a signal, the transmitting side spatiotemporal pattern for the second radio node 120 is determined based on a predefined rule. .. The transmitting side spatiotemporal pattern is the second radio node 1
Can be determined at 20.

Action 603
The second radio node 120 transmits a signal according to the determined transmitting side spatiotemporal pattern.

Action 604
The first radio node 110 detects a signal according to the receiving side spatiotemporal sweep pattern of the first radio node 110.

Action 605
The first radio node 110 transmits a response to the second radio node 120 when a signal is detected.

Action 606
If no response is received from the first radio node 110, the second radio node 120 retransmits the signal according to the pre-transmit side spatiotemporal pattern.

As an example, the embodiments here may be implemented in a next generation or 5G LTE wireless communication system operating at a high frequency of 10-30 GHz. FIG. 7 shows an example of defining or determining a receiving side spatiotemporal sweep pattern for the BS, i.e. the server radio node 110. The upper part of FIG. 7 shows the determined receiving side spatiotemporal sweep pattern as a random access resource block configuration. Random access resource block
The server radio node 110 is a resource block that expects to receive a preamble from a client radio node that performs random access. Beams 1 to 4 shown in the lower right of FIG. 7 are received beam IDs (Identities) from the BS side, for example, directions. A unique random access resource block is configured for each beam (eg beam 1) or beam group (eg beam 1 + 2). In particular, unique physical random access channel (PRACH) resource blocks (continuous or discontinuous) can be configured for various beams. For time division and frequency division multiplexing (TDM / FDM) systems, a resource block is configured only for the use of a beam, as shown in FIG.

This receiver spatiotemporal sweep pattern is known to both the client radio node and the server radio node. From the client radio node side, the client radio node knows from which beam direction the server radio node receives the signal of the client radio node. Then, the client radio node transmits a random access preamble in the resource block having the beam ID corresponding to the received beam ID. From the server radio node side, the server radio node knows which receive beam direction is used for various random access resource blocks.

As an example of an embodiment in which in a 5G LTE system, a transmitting side spatiotemporal pattern is determined based on information instructed by a server radio node 110 to a client radio node 120, the BS has all of them, as illustrated in FIG. A random access resource block configuration for the receive beam may be transmitted at each beacon beam in the beacon sweep pattern. Alternatively, the BS transmits only a random access resource block configuration for a receive beam in the corresponding beacon beam of the beacon sweep pattern, as illustrated in FIG. That is, the random access resource block configuration for the receive beam i is instructed and transmitted in the beacon beam i.

As mentioned above, the principle of the embodiment here is that the server radio node 110 uses a pre-defined or pre-determined receiver spatiotemporal sweep pattern to generate at least one signal.
For example, detecting and / or receiving the RA preamble, and the client radio node 120 transmitting the RA preamble according to a determined transmitting side spatiotemporal pattern. The transmitting side spatiotemporal pattern of the client radio node 120 is based on the receiving side spatiotemporal sweep pattern, or the timing at which the beam of the receiving side spatiotemporal sweep pattern of the server radio node is directed to the area where the client radio node is located. Determined either based on or based on information directed to the client radio node, for example, the information on the transmitting side spatiotemporal pattern of the client radio node for each beam corresponds to the beacon sweep pattern. On the beacon beam, the server radio node 110 instructs the client radio node. With such a pattern definition, the client radio node 120 knows when one or more beams of the receiver spatiotemporal sweep pattern of the server radio node 110 are directed to the area where the client radio node 120 is located. It can be obtained and the client radio node 120 may transmit at least one signal, eg, RA preamble, only during the occurrence of these beams. As a result, the number of repeated signals or RA preambles transmitted from the client radio node 120 during the association or connection setup can be significantly reduced or avoided. The interference caused by these repeated transmissions is also reduced. Thus, the throughput and signal quality of wireless communication networks are increased and improved.

Those skilled in the art have described the above receive module 502, determination module 504, and transmit module 506 for the server radio node 110 or the client radio node 120 as one circuit or a combination of one module, analog circuit and digital circuit, each module. You will recognize that it may be referred to as one or more processors configured using software, firmware, and / or any other digital hardware that performs the functions of. A combination of these processors, analog and digital circuits, and one or more of the other digital hardware are single application specific integrated circuits (ASICs).
) May be included, or individually packaged or system-on-chip (SoC)
), Several processors and different analog / digital hardware may be distributed among several separate components.

The embodiment here for the server radio node 110 and / or the client radio node 120 in the wireless communication network 100 is a function of the embodiment here through one or more processors such as processor 508 in the server / client radio node. And may be implemented with computer program code to perform the action. The above program code may be, for example, server / client wireless node 110 /
It may be provided as a computer program product in the form of a data carrier that carries the computer program code for executing the embodiments herein when loaded within 120. One such carrier can be in the form of a CD ROM disc. However, such a carrier can be realized by using another data carrier such as a memory stick. The computer program code may also be provided as pure program code on the server and downloaded to the server / client radio nodes 110/120.

The memory 510 in the server / client wireless node 110/120 may include one or more memory units and receives for the purpose of performing the method here when executed in the server / client wireless node 110/120. It may be arranged and used to store information, measurements, data, and configurations.

When the word "comprise or comprising" is used, it shall be construed as non-limiting, i.e., meaning "consist at least of".

The embodiment here is not limited to the above-mentioned preferred embodiment. Various modifications, modifications, and equivalents may be used. Therefore, the above embodiment should not be regarded as limiting the scope of the present invention, and the present invention is defined by the appended claims.

Claims (25)

A method performed by a server radio node (110) for receiving a signal from a client radio node (120) in a wireless communication network (100).
Determining the receiving side spatiotemporal sweep pattern for the server radio node (110) based on the index of the beacon beam in the beacon sweep pattern used by the server radio node (201).
Including receiving at least one signal from the client radio node (120) based on the receiving side spatiotemporal sweep pattern (203).
The at least one signal is transmitted by the client radio node (120) according to a transmitting side spatiotemporal pattern determined by the client radio node (120) based on a predefined rule .
The predefined rule defines when the client radio node transmits the signal to the server radio node according to the index of the beacon beam . The predefined rule is to apply the transmitting side spatiotemporal pattern for each beam of the transmitting side spatiotemporal pattern of the client radio node (120) to the server radio on the corresponding beacon beam of the beacon sweep pattern. The method according to claim 1, based on instructing the client radio node (120) by a node (110). The method of claim 1 or 2, wherein the predefined rules are based on the receiver spatiotemporal sweep pattern of the server radio node (110). The predefined rule is based on the timing at which the beam of the receiving side spatiotemporal sweep pattern of the server radio node (110) is directed towards the area where the client radio node (120) is located. Item 2. The method according to Item 1 or 2. A method performed by a client radio node (120) for transmitting a signal to a server radio node (110) in a wireless communication network (100).
Determining the index of the beacon beam in the beacon sweep pattern used by the server radio node and
Determining the sender spatiotemporal pattern for the client radio node (120) based on predefined rules (401), and
At least one signal is transmitted to the server radio node (110) according to the determined transmitting side spatiotemporal pattern (402).
Including
The predefined rule defines when the client radio node transmits the signal to the server radio node according to the index of the beacon beam . The at least one signal transmitted from the client radio node (120) to the server radio node (110) includes random access preambles, control or data information, scheduling requests, buffer status reports, conflict messages, and tracking area updates. The method of claim 5, which comprises one or more of the information. A server wireless node (110) for receiving a signal from a client wireless node (120) in a wireless communication network (100).
The receiving side spatiotemporal sweep pattern for the server radio node (110) is determined based on the index of the beacon beam in the beacon sweep pattern used by the server radio node.
Receives at least one signal from the client radio node (120) based on the receiving side spatiotemporal sweep pattern.
Is configured as
The at least one signal is transmitted by the client radio node (120) according to a transmitting side spatiotemporal pattern determined by the client radio node (120) based on a predefined rule, and the predefined rule. Defines when the client radio node transmits the signal to the server radio node according to the index of the beacon beam.
Server radio node (110). The server radio node (110) according to claim 7, wherein the server radio node (110) is configured to determine the receiving side spatiotemporal sweep pattern based on the beacon sweep pattern. The server radio node (110) is configured to determine the receiving side spatiotemporal sweep pattern with a certain index offset based on the index of the beacon beam of the beacon sweep pattern, thereby determining the beacon sweep pattern. The server radio node (110) according to claim 8, wherein the receiving side spatiotemporal sweep pattern is determined based on the above. The server radio according to claim 9, wherein the index offset is defined in advance so that signaling from the server radio node (110) is not required to notify the client radio node (120) of the index offset. Node (110). The server radio node (110) according to claim 9, wherein the server radio node (110) is configured to direct the index offset to the client radio node (120) via broadcast or dedicated signaling. .. 7. The server radio node (110) is configured to determine the receiving side spatiotemporal sweep pattern by defining a set of receiving side spatiotemporal sweep pattern candidates. The server radio node (110) described. The server radio node (110) is further configured to notify the client radio node (120) of a selected receiver spatiotemporal sweep pattern from the set of receiver spatiotemporal sweep pattern candidates. The server wireless node (110) according to claim 12. The server radio node (110) is further configured to transmit the index of the selected receiver spatiotemporal sweep pattern to the client radio node (120), thereby causing the selected receiver spatiotemporal space. The server radio node (110) according to claim 13, configured to notify the client radio node (120) of a sweep pattern. A client wireless node (120) for transmitting a signal to a server wireless node (110) in a wireless communication network (100).
The index of the beacon beam in the beacon sweep pattern used by the server radio node is determined and
Based on a predefined rule, the sender spatiotemporal pattern for the client radio node (120) is determined.
At least one signal is transmitted to the server radio node (110) according to the determined transmitting side spatiotemporal pattern.
Is configured as
The pre-defined rule defines when the client radio node transmits the signal to the server radio node according to the index of the beacon beam , the client radio node (120). The client radio node (120) according to claim 15, wherein the predefined rule is based on information instructed by the server radio node (110) to the client radio node (120). The information directed by the server radio node (110) to the client radio node (120) relates to the transmit side spatiotemporal pattern for each beam of the transmit side spatiotemporal pattern of the client radio node (120). The client radio node (120) according to claim 16, which includes information. The predefined rules are based on the preferred beacon beam index determined by the client radio node (120) from the beacon sweep pattern.
The client radio node (120) according to claim 15. The client radio node (120) is further configured to determine the number of repeated transmissions in the transmitting side spatiotemporal pattern for the client radio node (120) to a predefined rule. 15. The client radio node (120) of claim 15, configured to determine a sender spatiotemporal pattern based on. The client radio node (120) is the server at a time when the beam of the receiving side spatio-temporal sweep pattern of the server radio node (110) is directed toward the area where the client radio node (120) is located. By being configured to transmit the at least one signal to the radio node (110), at least one signal is transmitted to the server radio node (110) according to the determined transmitting side spatiotemporal pattern. The client radio node (120) according to claim 15, which is configured in 1. The client radio node (120) iteratively generates a beam of the receiving side spatiotemporal sweep pattern of the server radio node (110) at the time of the determined beam occurrence and spatially adjacent to the determined beam occurrence. At times, by being configured to transmit the at least one signal, it is configured to transmit at least one signal to the server radio node (110) according to the determined transmitting side spatiotemporal pattern. The client radio node (120) according to claim 15. The determined beam-generated beam of the receiving-side spatiotemporal sweep pattern of the server radio node (110) has a certain index offset relative to the preferred beacon beam index, and the determined beam-generated beam. 21. The client radio according to claim 21, wherein the spatially adjacent beam-generated beams have an index offset of +1 and an index offset of -1, respectively, with respect to the index offset of the determined beam-generated beam. Node (120). The client radio node further retransmits the at least one signal to the server radio node (110) according to a preliminary transmit side spatiotemporal pattern when no response is received from the server radio node (110). The client radio node (120) according to any one of claims 15 to 22, which is configured in 1. 23. The client radio node (120) according to claim 23, wherein the number of repeated transmissions in the preliminary transmitting side spatiotemporal pattern is larger than the number of repeated transmissions in the determined transmitting side spatiotemporal pattern. .. 23 or 24 of claim 23 or 24, wherein the preliminary transmit side spatiotemporal pattern is configured by the server radio node (110) based on a spatial mismatch between the receive beam and the transmit beam of the server radio node (110). The client radio node (120) according to.