CN117858178A

CN117858178A - Electronic device, operation method of the same, and wireless communication system

Info

Publication number: CN117858178A
Application number: CN202311274223.2A
Authority: CN
Inventors: 郑多海; 高健荣; 金钒坤; 都周铉; 沈明俊; 沈有真
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2022-10-07
Filing date: 2023-09-28
Publication date: 2024-04-09

Abstract

An electronic device, a wireless communication method, and a wireless communication system are disclosed. The electronic device may receive a first synchronization signal comprising at least one first Synchronization Signal Block (SSB) from a serving base station and a second synchronization signal comprising at least one second SSB from a neighboring base station, wherein the second synchronization signal overlaps with a time slot through which data is transmitted from the serving base station. Additionally, the apparatus may measure a first received power and a received Reference Signal Received Power (RSRP) of each of the first and second synchronization signals received over the time slot. The apparatus may calculate an effective RSRP corresponding to at least one further SSB received from the serving base station, the effective RSRP calculated based on a correlation power, wherein the correlation power is based on a cross-correlation between the received RSRP, the first received power, the data and the at least one further SSB.

Description

Electronic device, operation method of the same, and wireless communication system

Cross Reference to Related Applications

The present application is based on and claims priority of korean patent application No.10-2022-0129055 filed on 10 th month 7 of 2022 and korean patent application No.10-2023-0040758 filed on 3 rd month 28 of 2023, the disclosures of which are incorporated herein by reference in their entireties.

Technical Field

The present disclosure relates generally to an electronic device, and more particularly, to an electronic device that measures Reference Signal Received Power (RSRP) and a method for operating the same.

Background

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcast, etc. Some wireless communication systems employ multiple access techniques that are capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access techniques include Code Division Multiple Access (CDMA) systems, time Division Multiple Access (TDMA) systems, and the like. Additionally, the system may conform to specifications such as third generation partnership project (3 GPP), 3GPP Long Term Evolution (LTE), and the like.

A wireless communication system may include a plurality of devices (e.g., terminals, network devices, and other devices) that exchange data, control information, reference signals, etc. (e.g., communicate) with one another. In some examples, an apparatus operating in a wireless communication system may employ various techniques to improve throughput or achieve high data rates. These techniques may allow wireless communication systems to support more and more communications between devices, support advanced functions at various devices, improve the quality of communications between devices, and so forth. Examples of techniques to improve throughput may include beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), antenna arrays, analog beamforming, massive antenna techniques, and so forth.

In order to support the mobility function, a cellular communication system including a 5G communication system periodically measures RSRP of a base station to which a terminal or an electronic device is currently connected and RSRP of neighboring base stations. The terminal or the electronic device may perform a handover to one of the neighboring base stations corresponding to the higher RSRP by comparing the RSRP of the base station currently connected to with the RSRP of the neighboring base station. However, in some cases, the terminal or electronic device may make an inefficient handover decision (e.g., such as performing a handover to a base station with low channel quality). There is therefore a need in the art for efficient handoff techniques within a wireless communication system.

Disclosure of Invention

The present disclosure describes an apparatus for measuring an effective Reference Signal Received Power (RSRP) of a neighbor base station while removing interference impact of a serving base station and a method for operating the same.

According to one aspect of the disclosure, a method is described, the method comprising: receiving a first synchronization signal including at least one first Synchronization Signal Block (SSB) from a serving base station and receiving a second synchronization signal including at least one second SSB from a neighboring base station, wherein the second synchronization signal including the at least one second SSB overlaps with a time slot through which data is transmitted from the serving base station; and measuring a first received power and a received RSRP of each of the first and second synchronization signals received in the slot; and calculating an effective RSRP corresponding to the at least one further SSB received from the serving base station, the effective RSRP calculated based at least in part on the correlated power, wherein the correlated power is based at least in part on a cross-correlation between the received RSRP, the first received power, the data, and the at least one further SSB.

According to another aspect of the disclosure, an apparatus (e.g., an electronic device) is described, the apparatus comprising: communication circuitry configured to receive a first synchronization signal from a serving base station comprising data on resources of at least one first SSB and to receive a second synchronization signal from a neighboring base station comprising at least one second SSB, the second synchronization signal comprising at least one second SSB sent to further resources corresponding to resources of the at least one first SSB comprising data; and a memory configured to store a simulated value of the correlation coefficient based on a cross-correlation between the data and the at least one second SSB; and control circuitry, wherein the control circuitry comprises RSRP updating circuitry configured to measure each of the received RSRP and the first received power based at least in part on using the data received on the resource and the at least one second SSB, and to calculate an effective RSRP corresponding to the at least one further SSB received from the serving base station, the effective RSRP calculated based at least in part on the received RSRP, the first received power, and the analog value stored in the memory.

According to another aspect of the present disclosure, a wireless communication system is described, comprising: a serving base station configured to transmit a first set of Synchronization Signal Block (SSB) bursts comprising a first SSB and data to an electronic device; and a neighboring base station configured to transmit a second SSB burst set including a second SSB to the electronic device, the second SSB transmitted on a further time slot corresponding to the time slot for the data; and electronics configured to measure each of a first received power, a received RSRP, and a signal-to-interference-plus-noise ratio (SINR) based at least in part on the data received over the time slot and the second SSB, and to calculate an effective RSRP corresponding to the second SSB based at least in part on the received RSRP, the first received power, the data, and a correlated power based on a cross-correlation of the second SSB based at least in part on determining that the SINR is less than a threshold.

Drawings

The embodiments will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which

In the figure:

fig. 1 is a diagram of a wireless communication system according to an embodiment of the present disclosure;

fig. 2 is a block diagram of a serving base station according to an embodiment of the present disclosure;

FIG. 3 is a block diagram of an electronic device according to an embodiment of the present disclosure;

fig. 4A illustrates an example of a signal received by an electronic device from a serving base station according to an embodiment of the present disclosure;

fig. 4B illustrates an example of a signal received by an electronic device from a neighboring base station in accordance with an embodiment of the present disclosure;

fig. 5 illustrates a signal exchange of a wireless communication system according to an embodiment of the present disclosure;

fig. 6 is a flowchart of a detailed operation method of calculating an effective Reference Signal Received Power (RSRP) according to an embodiment of the present disclosure;

fig. 7 is a graph illustrating RSRP measurements according to interference effects according to an embodiment of the present disclosure; and

fig. 8 is a block diagram of a wireless communication device according to an embodiment of the present disclosure.

Detailed Description

A wireless communication system may generally comprise or refer to a plurality of devices employing techniques for wirelessly exchanging information. For example, a wireless communication system may include terminals (e.g., user equipment or user equipment) and base stations (or network entities) that wirelessly transmit data, control information, reference signals, etc. (e.g., according to various wireless communication system implementations).

In order to meet the increasing demand for wireless data traffic since the deployment of the 4 th generation (4G) communication systems, efforts have been made to develop improved 5 th generation (5G) or pre-5G communication systems. Thus, a 5G or pre-5G communication system may also be referred to as a "super 4G network" or a "Long Term Evolution (LTE) after-system. A 5G communication system may be considered to be implemented in a higher frequency (e.g., millimeter wave (mmW)) band, such as the 60GHz band, in order to achieve a higher data rate.

Techniques including, for example, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, and analog beamforming may be implemented in a 5G communication system to reduce propagation loss of radio waves and increase transmission distances. Further, in the 5G communication system, development of system network improvement is being performed based on advanced small cells, cloud Radio Access Networks (RANs), ultra dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, cooperative multipoint (CoMP), reception-side interference cancellation, and the like.

To support mobility functions, cellular communication systems (e.g., including 5G communication systems) may periodically perform channel quality measurements (e.g., reference Signal Received Power (RSRP) measurements, reference Signal Received Quality (RSRQ) measurements, received Signal Strength Indicator (RSSI) measurements, etc.) of serving base stations (e.g., base stations to which a terminal or electronic device is currently connected) and channel quality measurements of neighboring base stations. In some cases, the terminal or electronic device may perform a handoff from the serving base station to one of the neighboring base stations corresponding to a better channel quality (e.g., a higher RSRP or RSRQ) by comparing the channel quality measurement of the serving base station with the channel quality measurement of the neighboring base stations. However, in some cases, the terminal or the electronic device may perform a handover to a base station having low channel quality due to inaccurate channel quality measurements of neighboring base stations.

For example, a serving base station (e.g., a serving cell, a network entity, etc.) may include data on resources of a Synchronization Signal Block (SSB) to send to an electronic device. As channel quality improves, the serving base station may transmit data to the electronic device at high transmit power to improve throughput. However, when an electronic device performs measurements of a neighboring base station (e.g., power measurements, channel quality measurements, RSRP, etc.) to determine whether to perform a handoff to the neighboring base station or to another base station, the data received from the serving base station may cause strong interference. For example, when an electronic device measures RSRP (or another channel quality measurement) of a neighboring base station, an excessive measurement of RSRP may occur due to the received power of the data (e.g., on the resources of the SSB). Subsequently, problems may occur when attempting to perform a handover to a neighboring base station having poor channel quality due to the excessively measured RSRP.

As provided herein, techniques and methods are described for an electronic device to measure an effective RSRP of a neighboring base station by using a received RSRP and a received signal power when attempting to perform a handoff to the neighboring base station. The electronics can determine whether to measure the effective RSRP by measuring additional channel quality (e.g., signal-to-interference-plus-noise ratio (SINR), signal-to-noise ratio (SNR), etc.). When the channel quality is less than a threshold (e.g., SINR is less than a threshold), the electronic device may determine to calculate an effective RSRP for the neighboring base station. The electronic device may estimate the received power of the data from the serving base station by using the received RSRP, the received signal power, and the power value generated due to the cross correlation based on the SSB sequences. The electronics can then obtain an effective RSRP by subtracting the product of the received power of the data and the power value generated by the cross correlation from the received RSRP.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Fig. 1 is a diagram of a wireless communication system 10 according to an embodiment of the present disclosure.

Referring to fig. 1, a wireless communication system 10 may include a serving base station 110, an electronic device 120, and a neighbor base station 130.

In some embodiments, the serving base station 110 may include a network infrastructure that provides wireless access to the electronic device 120. The serving base station 110 may have coverage defined as a particular geographic area based on the distance to which the signal may be transmitted. In addition to base stations, serving base station 110 may be referred to as an "access point" (AP), "eNodeB" (eNB), "5 th generation (5G) node," "wireless point," or other terms having the same technical concepts.

Additionally, in some embodiments, the serving base station 110 may be connected to one or more "transmission/reception points" (TRPs). The serving base station 110 may transmit downlink signals to the electronic device 120 or receive uplink signals from the electronic device 120 via one or more TRPs.

In some embodiments, the serving base station 110 and the neighbor base stations 130 may broadcast synchronization signals. The synchronization signal may include a signal for synchronizing between the electronic device 120 and the serving base station 110 or the neighboring base station 130. For example, the serving base station 110 may broadcast a first reference signal RS1 and the neighboring base station 130 may broadcast a second reference signal RS2. In some examples, the neighboring base station 130 may transmit the second reference signal RS2 concurrently with the serving base station 110 transmitting a downlink signal (e.g., a Physical Downlink Shared Channel (PDSCH)) to the electronic device 120.

In some embodiments, the electronic device 120 may include a device used by a user. Additionally, the electronic device 120 may communicate with the serving base station 110 via a wireless channel. In addition to a "terminal," the electronic device 120 may be referred to as a User Equipment (UE), a mobile station, a subscriber station, a Customer Premise Equipment (CPE), a remote terminal, a wireless terminal, a user device, or other terminology having an equivalent technical concept.

In some embodiments, the electronic device 120 may receive a synchronization signal from each of the serving base station 110 and the neighboring base station 130. For example, the electronic device 120 may receive the first reference signal RS1 from the serving base station 110 and may receive the second reference signal RS2 from the neighboring base station 130. The electronics 120 can receive the first reference signal RS1 and the second reference signal RS2 to determine a switch based on the signal strength of the reference signals. For example, when the signal strength of the second reference signal RS2 is greater than the signal strength of the first reference signal RS1, the electronic device 120 may determine that the electronic device 120 moves in the direction in which the neighboring base station 130 is located. Additionally, when the electronic device 120 connects to the neighboring base station 130 based on a higher signal strength of the second reference signal RS2 received from the neighboring base station 130, the electronic device 120 may determine that the signal quality is better. Accordingly, when the signal strength of the second reference signal RS2 is greater than the signal strength of the first reference signal RS1, the electronic device 120 may determine to perform the handover to the neighboring base station 130.

Fig. 2 is a block diagram of a serving base station 110 according to an embodiment of the present disclosure. The serving base station 110 may represent aspects of the serving base station 110 as described with reference to fig. 1 or may be represented by aspects of the serving base station 110 as described with reference to fig. 1.

Referring to fig. 2, the serving base station 110 may include a wireless communication circuit 210, a backhaul communication circuit 220, a memory 230, and a control circuit 240.

The wireless communication circuit 210 may transceive signals via a wireless channel. In some embodiments, the wireless communication circuit 210 may perform a conversion function between baseband signals and bit strings according to the physical layer standard of the system. For example, during data transmission, the wireless communication circuit 210 may generate complex symbols by encoding and modulating a transmission bit string, and during data reception, may recover the received bit string by demodulating and decoding the baseband signal. Additionally, the wireless communication circuit 210 may up-convert a baseband signal into a Radio Frequency (RF) band signal and transmit the converted baseband signal via an antenna, or may down-convert an RF band signal received via an antenna into a baseband signal. To this end, the wireless communication circuit 210 may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a digital-to-analog converter (DAC), an analog-to-digital converter (ADC), and the like.

The wireless communication circuit 210 can transmit and receive signals. For example, the wireless communication circuit 210 may transmit synchronization signals, reference signals, system information, messages, control information, data, and the like. Further, the wireless communication circuit 210 may perform beamforming. The wireless communication circuit 210 may apply beamforming weights to a signal to be transceived to impart directivity to the signal. The wireless communication circuit 210 can repeatedly transmit signals by changing the formed beam.

In some aspects, the wireless communication circuit 210 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, etc.). Information received at the wireless communication circuit 210 may be passed on to other components of the device, such as the control circuit 240. In some aspects, the wireless communication circuit 210 may transmit signals generated by other components (e.g., such as the control circuit 240, etc.). In some cases, the wireless communication circuit 210 may be an example of aspects of a transceiver (e.g., in some cases, the wireless communication circuit 210 may be capable of sending or receiving multiple wireless transmissions simultaneously). In various examples, wireless communication circuit 210 may utilize a single antenna or multiple antennas.

Backhaul communication circuit 220 may provide a communication interface for performing with other nodes in the network. For example, the backhaul communication circuit 220 may convert a bit string transmitted from the serving base station 110 to another node (e.g., another connection node, another base station, an upper node, a core network, etc.) into a physical signal. Additionally, the backhaul communication circuit 220 may convert a physical signal received from another node into a bit string.

The memory 230 may store data such as basic programs, application programs, and setting information for the operation of the serving base station 110. Memory 230 may include volatile memory, nonvolatile memory, or a combination thereof. For example, the memory 230 may include at least one of a cell Identification (ID) of at least one neighbor base station adjacent to the serving base station 110, a Long Term Evolution (LTE) bandwidth, an LTE center frequency location, multicast Broadcast Single Frequency Network (MBSFN) configuration information, and Test Drive Development (TDD) configuration information.

The control circuit 240 may control the operation of the serving base station 110. For example, the control circuit 240 may transceive signals via the wireless communication circuit 210 or the backhaul communication circuit 220. Additionally, the control circuit 240 may record data in the memory 230 and read data from the memory 230. To this end, the control circuit 240 may include at least one processor.

Fig. 3 is a block diagram of an electronic device 120 according to an embodiment of the present disclosure. The electronic device 120 may represent aspects of the electronic device 120 as described with reference to fig. 1 or may be represented by aspects of the electronic device 120 as described with reference to fig. 1. Additionally, the electronic device 120 may communicate with the serving base station 110 as described with reference to fig. 1 and 2 and/or with the neighboring base station 130 as described with reference to fig. 1.

Referring to fig. 3, the electronic device 120 may include a communication circuit 310, a memory 320, and a control circuit 330.

The communication circuit 310 may transceive signals via a wireless channel. For example, the communication circuit 310 may perform a conversion function between a baseband signal and a bit string according to a physical layer standard of the system. For example, during data transmission, the communication circuit 310 may generate complex symbols by encoding and modulating a transmission bit string, and during data reception, may recover the received bit string by demodulating and decoding the baseband signal. Additionally, the communication circuit 310 may up-convert a baseband signal into an RF band signal, or may down-convert an RF band signal received via an antenna into a baseband signal. For example, the communication circuit 310 may include at least a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, and the like. The communication circuit 310 may perform beamforming. The communication circuit 310 may apply beamforming weights to a signal to be transceived to impart directivity to the signal.

The communication circuit 310 can transmit and receive signals. For example, the communication circuit 310 may receive a downlink signal. The downlink signals may include Synchronization Signals (SS), reference signals, system information, configuration messages, control information, downlink data, and the like. Additionally, the communication circuit 310 may transmit an uplink signal. The uplink signal may include a random access related signal, a reference signal (e.g., a Sounding Reference Signal (SRS), a demodulation reference signal (DM-RS), etc.), or uplink data.

The memory 320 may store data such as basic programs, application programs, and setting information for the operation of the electronic device 120. Memory 320 may include volatile memory, non-volatile memory, or a combination thereof. In addition, the memory 320 may provide stored data upon request of the control circuit 330.

In some embodiments, memory 320 may store R _I The average value was simulated. R is R _I A value representing a power term of a received signal caused by a cross-correlation between a downlink signal (e.g., PDSCH) of the serving base station 110 and the second reference signal RS2 of the neighboring base station 130 may be included. In other words, the memory 320 may be configured to simulate R _I R obtained by _I The analog average value is stored at R _I In the value storage portion 325 to calculate the effective RSRP of the neighboring base station 130, the electronic device 120 can use R _I The average value is simulated to estimate the received power of the downlink signal received from the serving base station 110. In some aspects, cross-correlation between signals (e.g., between received RSRP, received power, data, SSB, etc.) may include or refer to a measure of similarity between signals (e.g., as a function of time delay applied to one of the signals). For example, in some aspects, the signal may be a representation of a sequence of values. Cross-correlation may provide a way to analyze two signals or compare two signals (e.g., while considering different time lags) to identify delays, similarities, relationships, etc. between signals. As described in more detail herein, the cross-correlation aspect may be used to calculate an effective RSRP in order to more accurately determine when to perform a handover operation (e.g., determine whether a handover condition is met based on the effective RSRP and a received RSRP corresponding to the received SSB).

The control circuit 330 may control the overall operation of the electronic device 120. For example, the control circuit 330 may transceive signals via the communication circuit 310. Additionally, the control circuit 330 may record data in the memory 320 and read data from the memory 320. To this end, the control circuit 330 may include at least one processor or microprocessor, or may include a portion of a processor. In the case of a portion of a processor, the communication circuit 310 and a portion of the control circuit 330 may be referred to as a Communication Processor (CP).

In some embodiments, the control circuit 330 may also include an RSRP update circuit 335. The RSRP updating circuit 335 may include a circuit for measuring the effective RSRP of the second reference signal RS2 received from the neighboring base station 130. For example, the RSRP updating circuit 335 may estimate an RSRP (e.g., a valid RSRP) of the second reference signal RS2 received only from the neighboring base station 130 based on the RSRP measured by the electronic device 120 and the Received Signal Power (RSP) measured by the electronic device 120. The RSRP update circuit 335 may be based on measurements RSRP, RSP, and R stored in the memory 320 _I The average is simulated to estimate the power of the downlink signal received from the serving base station 110 (e.g.The power of the measured RSP). The RSRP update circuit 335 may estimate the effective RSRP due to the neighboring base station 130 by removing the estimated power of the downlink signal of the serving base station 110 from the measured RSRP. A detailed description of this activity is provided herein.

Fig. 4A illustrates an example of a signal received by an electronic device 120 from a serving base station 110, according to an embodiment of the present disclosure. Fig. 4B illustrates an example of a signal received by the electronic device 120 from a neighboring base station 130, according to an embodiment of the disclosure. The serving base station 110, the electronic device 120, and the neighboring base station 130 may represent aspects of respective devices as described with reference to fig. 1-3, or may be represented by aspects of respective devices as described with reference to fig. 1-3.

Referring to fig. 4A, the serving base station 110 may transmit a first SSB (SSB 0) to the electronic device 120. In some embodiments, serving base station 110 may send SSB burst sets to electronic device 120. The set of SSB bursts may be referred to as consecutive SSBs sent to the electronic device 120. For example, the SSB burst set may include eight SSBs. Serving base station 110 may allocate SSBs such that at least one SSB of the eight SSBs (e.g., SSBs 0 through SSB 7) is transmitted. For example, the serving base station 110 may assign a forefront SSB or a first SSB (e.g., SSB 0) to the electronic device 120. The serving base station 110 may transmit data on resources of at least one of the remaining SSBs (e.g., SSB1 through SSB 7) that are not allocated to the electronic device 120. For example, the serving base station 110 may send data to the electronic device 120 on the resources of the third to eighth SSBs (e.g., SSB2 to SSB 7).

As mentioned, the SSB burst set has been described as including eight SSBs, but is not limited thereto. In some embodiments, the SSB burst set may vary according to the operating frequency.

Referring to fig. 4B, the neighboring base station 130 may transmit first to fourth SSBs (e.g., SSBs 0 to SSB 3) to the electronic apparatus 120. The neighboring base station 130 may allocate SSBs such that at least one SSB of eight SSBs (e.g., SSBs 0 to SSB 7) included in the SSB burst set is transmitted. For example, the neighboring base station 130 may continuously allocate four SSBs (e.g., SSBs 0 through SSB 3) to the electronic device 120.

In some embodiments, the electronic device 120 may receive signals from the serving base station 110 and the neighboring base station 130 simultaneously. For example, the electronic device 120 may receive data from the serving base station 110 on the resources of the third to eighth SSBs (e.g., SSB2 to SSB 7). Additionally, the electronic device 120 may receive a third SSB and a fourth SSB (e.g., SSB2 and SSB 3) from the neighboring base station 130. That is, the electronic device 120 may receive data from the serving base station 110 and SSBs from the neighboring base station 130 upon receiving the third SSB and the fourth SSB (e.g., SSB2 and SSB 3), respectively.

The serving base station 110 may use a high transmit power when transmitting data to the electronic device 120 on the resources of the third SSB and the fourth SSB (e.g., SSB2 and SSB 3). For example, when the wireless environment has a higher SNR, the serving base station 110 may increase the strength of the transmit power to improve the throughput of the transmitted data. Meanwhile, the electronic device 120 may receive the third SSB and the fourth SSB (e.g., SSB2 and SSB 3) from the neighboring base station 130 at the time points of the third SSB and the fourth SSB (e.g., SSB2 and SSB 3), respectively. Thus, when the electronic device 120 measures the RSRP of the neighboring base station 130, the RSRP of the neighboring base station 130 may be excessively measured (e.g., because data or received signals may be received from the serving base station 110 based on high transmit power along with the third and fourth SSBs (SSB 2 and SSB 3) received from the serving base station 110). For example, it may be assumed that the RSRP value based on SSBs received from serving base station 110 is-80 dBm. When the serving base station 110 is closer to the electronic device 120 than the neighboring base station 130, the RSRP value based on SSBs received from the neighboring base station 130 may be less than-80 dBm. For example, the RSRP value based on SSB measurements received from neighboring base stations 130 may be-90 dBm. However, as shown in fig. 4A and 4B, when the serving base station 110 transmits data on the resources of the SSB at a high transmission power at a point of time when the neighboring base station 130 broadcasts the SSB, the RSRP value measured by the electronic device 120 may be-70 dBm. Accordingly, although the electronic device 120 has a poor wireless channel with the neighboring base station 130 (e.g., a lower channel quality with the wireless channel of the neighboring base station 130 than with the serving base station 110), there may be a problem of performing handover based on the excessively measured RSRP.

Fig. 5 illustrates a signal exchange of a wireless communication system according to an embodiment of the present disclosure. The handshaking of the wireless communication system of fig. 5 may include a serving base station 110, an electronic device 120, and a neighboring base station 130 that may represent aspects of a respective device as described with reference to fig. 1-4B or may be represented by aspects of a respective device as described with reference to fig. 1-4B.

Referring to fig. 5, in operation S110, the serving base station 110 may transmit a first reference signal RS1 and data to the electronic device 120. The serving base station 110 may transmit a first reference signal RS1 including at least one SSB of the SSB burst set to the electronic device 120. Referring together to fig. 4A, the first reference signal RS1 may include a first SSB (e.g., SSB 0). The serving base station 110 may transmit data on resources of at least one of the remaining SSBs except at least one SSB of the SSB burst set. For example, referring together to fig. 4A, data may be sent on the resources of the third and fourth SSBs (e.g., SSB2 and SSB 3) of the SSB burst set.

In operation S120, the neighboring base station 130 may transmit a second reference signal RS2 to the electronic device 120. The neighboring base station 130 may transmit a second reference signal RS2 including at least one SSB of the SSB burst set to the electronic device 120. Referring together to fig. 4B, the second reference signal RS2 may include first to fourth SSBs (e.g., SSBs 0 to SSB 3). In some embodiments, operation S110 and operation S120 may be performed simultaneously. For example, the electronic device 120 may receive data from the serving base station 110 on the resources of the third and fourth SSBs (e.g., SSB2 and SSB 3) and may simultaneously receive the third and fourth SSBs (e.g., SSB2 and SSB 3) from the neighboring base station 130.

In operation S130, the electronic device 120 may calculate an effective RSRP. To calculate the effective RSRP of the neighboring base station 130, the electronic device 120 may measure each of the received RSRP and the Received Signal (RS) power. The kth reference signal after the electronic device 120 descrambles the RSs received at the time points of the third SSB and the fourth SSB (e.g., SSB2 and SSB 3) may be represented by equation 1.

In equation 1, P _N May represent the received power, P, of SSBs received from neighboring base stations 130, e.g., third SSB (SSB 2) and fourth SSB (SSB 3) _I Can represent the received power, D, of data transmitted by the serving base station 110 at the same point in time of the third SSB (SSB 2) and the fourth SSB (SSB 3) _k Can represent data overlapped at the position of the kth reference signal, S _k Code sequence which can represent kth reference signal, and W _k The noise component included at the position of the kth reference signal may be represented.

The data overlapped at the position of the kth reference signal may be normalized, and E [ |D _k | ² ]1 may be satisfied. |S of code sequence _k | ² 1 may be satisfied. Noise may include an average value that satisfies 0 and a dispersion that satisfies σ ² Additive White Gaussian Noise (AWGN).

The electronics 120 can measure the RS power at the location of the kth reference signal, and the RS power can be represented by equation 2.

In this case, it can be assumed that the received power of the data received from the serving base station 110 is much larger than the received power (P _I ＞＞P _N ＞＞σ ² ). In this case, the RS power may be represented by equation 3.

Additionally, the electronic device 120 may measure the received RSRP. In some embodiments, when it is assumed that the received power of the data received from the serving base station 110 is greater than the received power (P _I ＞＞P _N ＞＞σ ² ) When, the reception RSRP can be calculated by using equation 4.

In this case P _N Can represent the received power, P, of the third SSB (SSB 2) and the fourth SSB (SSB 3) received from the neighboring base station 130 _I Can represent the received power, P, of data transmitted by the serving base station 110 at the same point in time of the third SSB (SSB 2) and the fourth SSB (SSB 3) _I The power generated by the cross correlation of SSB sequences based on the data of the serving base station 110 and the third SSB (SSB 2) and the fourth SSB (SSB 3) of the neighboring base station 130 may be represented.

The received power of the data received from the serving base station 110 can be represented by equation 5 by using the received RSRP and the received signal power.

In this case, R _I Can be represented by D _k And S is equal to _k Power generated by cross-correlation between, and in general, R _I Can be designed to be less than 1. The electronic device 120 may be configured to store R in the memory 320 as described with reference to fig. 3 _I The analog average is taken into equation 5 to estimate the power R of the data received from the serving base station 110 _I 。

Based on the equation 6,may represent R pre-stored in memory 320 _I Mean value is simulated, and>an estimated value of the received power of the data received from the serving base station 110 may be represented. By using the estimated value of the received power of the data and R _I Analog average, which can be calculated from equation 7, removes the band by the serving base station 110Effective RSRP of the influence of the interference.

In operation S140, the electronic device 120 may determine to perform handover based on the effective RSRP. For example, the electronic device 120 may compare the received RSRP of the first SSB (SSB 0) received from the serving base station 110 with the effective RSRP of the third SSB (SSB 2) and the fourth SSB (SSB 3) received from the neighboring base station 130. When the effective RSRP corresponding to the neighboring base station 130 is greater than the received RSRP corresponding to the serving base station 110, the electronic device 120 may determine to perform a handoff from the serving base station 110 to the neighboring base station 130.

Fig. 6 is a flowchart of a detailed method of operation of calculating an effective RSRP according to an embodiment of the present disclosure. In some embodiments, the electronic device 120 as described with reference to fig. 1-5 may be configured to perform the method of operation of calculating the effective RSRP as shown and described with reference to fig. 6.

Referring to fig. 6, the electronic device 120 may obtain a reception RSRP, an RS power, and an RS-SINR in operation S610.

In operation S620, the electronic device 120 may determine whether the RS-SINR is less than a threshold. When the RS-SINR is less than the threshold, the electronics 120 can calculate an effective RSRP for the neighboring base station 130. When there is no or less interference impact (e.g., RS-SINR is greater than a threshold), the RSRP of the neighboring base station 130 may be accurately measured without interference, and thus, calculating an effective RSRP may be unnecessary and may instead increase the complexity of the electronic device 120. When the RS-SINR exceeds the threshold, the electronic device 120 may proceed to operation S630 to skip or bypass RSRP updating. When the RS-SINR is less than the threshold, the electronic device 120 may proceed to operation S640.

In operation S640, the electronic device 120 may determine whether the received signal power exceeds the received RSRP. When the received signal power is less than the received RSRP, the electronic device 120 may proceed to operation S630 and may not perform the RSRP update. This is because when the received signal power is less than the received RSRP, r is according to equation 5 _I Becomes negative. That is, the electronic device 120 may determine whether the RS power exceeds the received RSRP to avoid undefined R in operation S640 _I Is the case in (a). When the RS power exceeds the received RSRP, the electronic device 120 may proceed to operation S650.

In operation S650, the electronic device 120 may receive RSRP, R by using the RS power _I Analog average orTo determine whether equation 8 is satisfied.

The condition of equation 8 may include dividing by equation 6RSRP input to equation 7 _eff To make RSRP _eff Conditions other than the case of becoming smaller than 0. A condition not meeting the above condition may indicate RSRP _eff Less than 0 and therefore undefined. Accordingly, the electronic device 120 may proceed to operation S630 to skip RSRP updating.

In operation S660, the electronic device 120 may calculateThe electronic device 120 may be configured to store R in the memory 320 _I Substitution of the analog average value into equation 5 described previously to obtain +.>Or an estimate of the power of the data received from the serving base station 110.

In operation S670, the electronic device 120 may calculate a valid RSRP. For example, by subtracting the signal obtained in operation S660 from the received RSRPMultiplied by as a storeR in memory 320 _I Analog average +.>And the obtained value, the electronic device 120 may obtain a valid RSRP based on SSBs of the neighboring base stations 130.

Fig. 7 is a graph illustrating RSRP measurement values according to interference effects according to an embodiment of the present disclosure. In some embodiments, the graphs showing RSRP measurements may represent RSRP measurements obtained by the electronic device 120 based on signals received from the serving base station 110, the neighboring base station 130, or both the serving base station 110 and the neighboring base station 130 as described herein and with reference to fig. 1-6.

Referring to fig. 7, a first curve 710 may represent an ideal RSRP. For example, it may be assumed that the electronic device 120 measures RSRP based on SSBs of the neighboring base stations 130 regardless of interference caused by signals of the serving base station 110. Referring to the first curve 710, it can be recognized that the RSRP in the case where the serving base station 110 transmits data with a high signal to interference ratio (SIR) at a low transmission power is the same as the RSRP in the case where the serving base station 110 transmits data with a low SIR at a high transmission power. For example, according to the first curve 710, the ideal RSRP may remain constant regardless of the magnitude of the transmit power of the data from the serving base station 110.

The second curve 720 may represent RSRP according to a comparative example. From the second curve 720, it is recognized that as the SIR decreases, the measured value of RSRP increases. For example, in an area where data is transmitted by the serving base station 110 with low transmit power and high SIR, the data from the serving base station 110 may cause little or weak interference impact. Thus, it is recognized that the RSRP of the second curve 720 in the region having the high SIR is similar to the ideal RSRP of the first curve 710. When the serving base station 110 transmits data at high transmit power, the SIR may be reduced. For example, when the serving base station 110 transmits data with high transmission power, in case the electronic device 120 measures RSRP of the neighboring base station 130, the transmitted data may become interference. However, because SSB sequence-based cross-correlation occurs, the RSRP of the neighboring base station 130, as measured by the electronic device 120, is identified to increase.

The third curve 730 may represent RSRP measured according to an embodiment of the present disclosure. For example, the RSRP of the third curve 730 may correspond to the effective RSRP. According to the third curve 730, as the SIR decreases, the measured value of RSRP may increase, as is the case with the second curve 720. Meanwhile, the RSRP value according to the third curve 730 may be measured as 4dB smaller than the RSRP of the Fang Bidi second curve 720 at the point where the SIR is-4 dB. This may be because, as previously described, the power value of the cross-correlation according to the data received from the serving base station 110 has been subtracted.

Fig. 8 is a block diagram of a wireless communication device 1200 according to an embodiment of the disclosure.

Referring to fig. 8, the wireless communication apparatus 1200 may include a modulator/demodulator (modem) (not shown) and a Radio Frequency Integrated Circuit (RFIC) 1260, and the modem may include an Application Specific Integrated Circuit (ASIC) 1210, a special instruction set processor (ASIP) 1230, a memory 1250, a main processor 1270, and a main memory 1290. The wireless communication device 1200 in fig. 8 may include an electronic device 120 as described with reference to fig. 1-7 in accordance with an embodiment of the present disclosure.

The RFIC 1260 may be connected to an antenna (Ant), and may receive a signal from the outside or transmit a signal to the outside by using a wireless communication network. ASIP 1230 may include an integrated circuit tailored for a particular application, support a specific instruction set for a particular application, and execute instructions included in the specific instruction set. The memory 1250 may communicate with the ASIP 1230 and may also store a plurality of instructions executed by the ASIP 1230 as a non-volatile storage. For example, memory 1250 may include any type of memory accessible by ASIP 1230, such as Random Access Memory (RAM), read Only Memory (ROM), magnetic tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and combinations thereof, as non-limiting examples.

Examples of memory devices include solid state memory and hard drives. In some examples, memory is used to store computer-readable, computer-executable software comprising instructions that when executed cause a processor to perform the various functions described herein. In some cases, the memory includes, among other things, a basic input/output system (BIOS) that controls basic hardware or software operations, such as interactions with peripheral components or devices. In some cases, the memory controller operates the memory cells. For example, the memory controller may include a row decoder, a column decoder, or both a row decoder and a column decoder. In some cases, memory cells within a memory store information in the form of logical states.

In some aspects, the host processor 1270 may be an intelligent hardware device (e.g., a general purpose processing component, a Digital Signal Processor (DSP), a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), a microcontroller, an Application Specific Integrated Circuit (ASIC) (e.g., or in communication with ASIC 1210), a Field Programmable Gate Array (FPGA), a programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof. In some cases, the main processor 1270 is configured to operate a memory array using a memory controller. In other cases, the memory controller is integrated into the processor. In some cases, host processor 1270 is configured to execute computer readable instructions stored in memory to perform various functions. In some embodiments, host processor 1270 includes dedicated components for modem processing, baseband processing, digital signal processing, or transmission processing.

The main processor 1270 may control the wireless communication device 1200 by executing a plurality of instructions. For example, the main processor 1270 may also control the ASIC 1210 and ASIP 1230 and may process data received via a wireless communication network or process user inputs to the wireless communication device 1200. Main memory 1290 may be in communication with main processor 1270 and may store, as non-volatile storage, a plurality of instructions for execution by main processor 1270. For example, main memory 1290 may include, by way of non-limiting example, any type of memory accessible by main processor 1270, such as RAM, ROM, magnetic tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and combinations thereof.

While the present disclosure has been particularly shown and described with reference to embodiments thereof, it will be understood that various changes in form and details may be made therein without departing from the spirit and scope of the appended claims.

Claims

1. A method of wireless communication, comprising:

receiving a first synchronization signal including at least one first synchronization signal block from a serving base station and receiving a second synchronization signal including at least one second synchronization signal block from a neighboring base station, wherein the second synchronization signal including the at least one second synchronization signal block overlaps with a slot through which data is transmitted from the serving base station; and

Measuring a first received power and a received reference signal received power of each of the first and second synchronization signals received over the time slot; and

an effective reference signal received power corresponding to at least one further synchronization signal block received from the serving base station is calculated, the effective reference signal received power being calculated based at least in part on a correlation power, wherein the correlation power is based at least in part on a cross-correlation between the received reference signal received power, the first received power, the data, and the at least one further synchronization signal block.

2. The wireless communication method of claim 1, further comprising:

measuring a signal-to-interference-plus-noise ratio based at least in part on the first and second synchronization signals received over the time slot; and

the signal to interference plus noise ratio is compared to a predetermined threshold.

3. The wireless communications method of claim 2, wherein the effective reference signal received power is calculated based at least in part on detecting that the signal to interference plus noise ratio is less than the predetermined threshold.

4. The wireless communication method of claim 1, further comprising:

it is determined whether the first received power detected over the time slot exceeds the received reference signal received power.

5. The wireless communications method of claim 4, wherein the effective reference signal received power is calculated based at least in part on detecting that the first received power detected over the time slot exceeds the received reference signal received power.

6. The wireless communication method of claim 1, wherein calculating the effective reference signal received power further comprises:

measuring a second received power corresponding to the data based at least in part on the first received power, the received reference signal received power, and the correlated power detected over the time slot; and

the effective reference signal received power is obtained by subtracting a product of the second received power corresponding to the data and the correlation power from the received reference signal received power.

7. The wireless communications method of claim 6, wherein a second received power corresponding to the data is obtained based at least in part on dividing a first value by a second value, the first value being obtained by subtracting the received reference signal received power from the first received power and the second value being obtained by subtracting the associated power from 1.

8. The wireless communication method of claim 6, further comprising:

determining whether a handover condition is satisfied based on the effective reference signal received power and the received reference signal received power corresponding to the at least one first synchronization signal block; and

a handoff from the serving base station to the neighbor base station is performed based at least in part on determining that the handoff condition is satisfied.

9. An electronic device, comprising:

a communication circuit configured to receive a first synchronization signal comprising data on a resource of at least one first synchronization signal block from a serving base station and to receive a second synchronization signal comprising at least one second synchronization signal block from a neighboring base station, the second synchronization signal comprising the at least one second synchronization signal block sent to a further resource, the further resource corresponding to the resource of the at least one first synchronization signal block comprising the data;

a memory configured to store analog values of correlation coefficients based on cross-correlations between the data and the at least one second synchronization signal block; and

the control circuitry is configured to control the operation of the control circuitry,

wherein the control circuitry comprises reference signal received power update circuitry configured to measure each of a received reference signal received power and a first received power based at least in part on the data received on the resource and the at least one second synchronization signal block and to calculate an effective reference signal received power corresponding to at least one further synchronization signal block received from the serving base station, the effective reference signal received power calculated based at least in part on the received reference signal received power, the first received power, and an analog value stored in the memory.

10. The electronic device of claim 9, wherein the reference signal received power update circuit is configured to measure a signal-to-interference-plus-noise ratio based at least in part on the data received on the resource and the at least one additional synchronization signal block and compare the signal-to-interference-plus-noise ratio to a predetermined threshold.

11. The electronic device of claim 10, wherein the reference signal received power update circuit is configured to calculate the effective reference signal received power based at least in part on detecting that the signal-to-interference-plus-noise ratio is less than the predetermined threshold.

12. The electronic device of claim 9, wherein the reference signal received power update circuit is configured to determine whether the first received power exceeds the received reference signal received power.

13. The electronic device of claim 12, wherein the reference signal received power update circuit is configured to calculate the effective reference signal received power based at least in part on detecting that the first received power exceeds the received reference signal received power.

14. The electronic device of claim 9, wherein the reference signal received power update circuit is configured to measure a second received power corresponding to the data based at least in part on the first received power, the received reference signal received power, and the analog value, and to obtain the effective reference signal received power by subtracting a product of the second received power corresponding to the data and the analog value from the received power, and

Wherein the second received power of the data is obtained based at least in part on dividing a first value by a second value, the first value being obtained by subtracting the received reference signal received power from the first received power, and the second value being obtained by subtracting the correlation coefficient from 1.

15. A wireless communication system, comprising:

a serving base station configured to transmit a first set of synchronization signal block bursts comprising a first synchronization signal block and data to an electronic device;

a neighboring base station configured to transmit a second set of synchronization signal block bursts comprising a second synchronization signal block to the electronic device, the second synchronization signal block being transmitted on a further time slot corresponding to a time slot for the data; and

the electronic device is configured to measure each of a first received power, a received reference signal received power, and a signal-to-interference-plus-noise ratio based at least in part on the data received over the time slot and the second synchronization signal block, and calculate an effective reference signal received power corresponding to the second synchronization signal block based at least in part on the received reference signal received power, the first received power, the data, and a correlation power based at least in part on a cross-correlation of the second synchronization signal block based at least in part on a determination that the signal-to-interference-plus-noise ratio is less than a threshold.

16. The wireless communication system of claim 15, wherein the electronics bypass the calculation of the effective reference signal received power based at least in part on determining that the signal-to-interference-plus-noise ratio is greater than the threshold.

17. The wireless communication system of claim 15, wherein the electronic device obtains a second received power corresponding to the data by dividing a first value by a second value, the first value is obtained by subtracting the received reference signal received power from the first received power, and the second value is obtained by subtracting the correlated power from 1.

18. The wireless communication system of claim 17, wherein the electronic device obtains the effective reference signal received power by subtracting a product of the second received power corresponding to the data and the correlated power from the received reference signal received power.

19. The wireless communication system of claim 18, wherein the electronic device calculates a serving reference signal received power based at least in part on the first synchronization signal block and compares the serving reference signal received power to the active reference signal received power.

20. The wireless communication system of claim 19, wherein the electronic device determines whether a handover condition is met based at least in part on the serving reference signal received power and the active reference signal received power, and determines whether to perform a handover from the serving base station to the neighboring base station based at least in part on the handover condition being met.