CN110731072B

CN110731072B - Base station and user equipment

Info

Publication number: CN110731072B
Application number: CN201880036978.XA
Authority: CN
Inventors: 杨宁
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2017-11-26
Filing date: 2018-11-26
Publication date: 2021-09-03
Anticipated expiration: 2038-11-26
Also published as: CN110731072A; WO2019101203A1

Abstract

A base station (101) is provided, comprising a processing unit (103), wherein the processing unit (103) is adapted to determine a forbidden frequency range (106 ', 106 ") for a predetermined user equipment, and wherein the processing unit (103) is adapted to transmit the frequency range (106', 106") to the predetermined user equipment (102).

Description

Base station and user equipment

Technical Field

The present invention relates to the field of communication network technology. In particular, the present invention relates to a method for disabling one or more frequencies of a user equipment.

Background

One feature of 5G is the ability to support different devices and services with different performance and data traffic models (e.g., IP data traffic, non-IP data traffic) and short data bursts (e.g., internet of things based applications). In such applications, the size of the data packets that a sensor can send range from small state updates to streaming video, or modern phones such as smart phones can produce widely varying amounts of data. In contrast to 4G, the architecture of 5G is not only designed for large amounts of data, but therefore supports short bursts of data without the need for lengthy signaling procedures before and after sending small amounts of data. Cloud applications like cloud robots may perform computations in the network rather than in the device, and thus may require low end-to-end latency and high data rates.

Different devices may also have different mobility requirements. The sensors embedded in the infrastructure may be stationary throughout their lifetime. Other devices may be stationary during activation, but may be free between activations, or other devices may be completely mobile.

The title is "third generation partnership project; technical specification group services and system aspects; the document 3GPP TS 22.011 V15.2.0(2017-09) of service accessibility (release 15) "relates to access control and describes that in some cases it may be desirable to prevent a user of a User Equipment (UE) from making access attempts, including emergency call attempts, or responding to pages in a Public Land Mobile Network (PLMN) specified area.

The title is "third generation partnership project; technical specification group radio access network; evolved universal terrestrial radio access (E-UTRA); document 3GPP TS 36.304 V13.7.0(2017-09) of User Equipment (UE) procedure in idle mode (release 13) "relates to cell reservation and access restriction.

The title is "third generation partnership project; technical specification group radio access network; NR; document 3GPP TS 38.213 V1.0.0(2017-09) for controlled physical layer procedure (release 15) "describes cell search as a procedure by which a UE acquires frequency and time synchronized with a cell and detects a physical layer cell ID of the cell.

The title is "third generation partnership project; technical specification group radio access network; NR; document 3GPP TS 38.211 V1.0.0(2017-09) for physical channels and modulation (release 15) "defines the carrier bandwidth part as a contiguous subset of physical resource blocks for a given set i of parameters on a given carrier.

Cell reservation and access restriction may be used to prevent certain UEs from connecting to certain cells, e.g., to prevent interference between cells.

Disclosure of Invention

It is an object of the present invention to provide efficient access control to a network.

Herein, a base station, a user equipment, a method for barring access, a program element and a computer readable medium are provided.

The subject matter of the invention is provided in the independent claims. Features of further exemplary embodiments of the invention are provided in the dependent claims.

According to an aspect of the present invention, there is provided a Base Station (BS) including a processing unit. The processing unit is adapted to determine frequency ranges forbidden or to be forbidden for a predetermined user equipment and to send information of the frequency ranges to the predetermined user equipment, e.g. in the form of a list, table and/or database.

According to another aspect of the present invention, a User Equipment (UE) comprising a processing unit is provided. The processing unit is adapted to receive a frequency range forbidden for the user equipment and to prevent the user equipment from attempting to access the frequency range. The frequency ranges may be received from the BS in the form of a list. The frequency range may be a single frequency value.

According to another aspect of the present invention, there is provided a method for inhibiting, comprising: determining a forbidden frequency range for the predetermined user equipment and transmitting information of the frequency range to the predetermined user equipment. The method may be performed within a base station.

According to yet another aspect of the present invention, there is provided a method for blocking access, the method including: information of a frequency range is received and attempts to access the frequency range are prevented. If the method is performed within a UE, a forbidden frequency range for the particular UE is received. The UE may then attempt to prevent access to the frequency range.

In New Radio (NR) systems, the cell restriction mechanism may be different from Long Term Evolution (LTE) because of the wider bandwidth in NR systems, e.g., 100MHz in low frequency, 400MHz in high frequency, multiple SSBs in NR systems that contain Primary Synchronization Signal (PSS)/Secondary Synchronization Signal (SSS)/Physical Broadcast Channel (PBCH) and Remaining Minimum System Information (RMSI) or remaining minimum SI, and because there is no bandwidth information in the Master Information Block (MIB) like LTE.

If there is a cell barring indication in the MIB or RMSI, the cell barring indication will only indicate the current frequency that the UE is barred from searching, but the UE does not know the width of the forbidden bandwidth.

In other words, NR supports scalable subcarrier spacing (SCS) and wider Channel Bandwidth (CBW) than LTE, which supports scalable SCS compared to the single 15kHz SCS option of LTE. Scalable SCS denoted as f_c＝15×2ⁿ[kHz]Where n is a non-negative integer. In one example, 15/30/60kHz S is used in the frequency range 1(FR1)CS values with CBW up to 100MHz, where FR1 denotes the frequency range in the frequency band 450-6000 MHz or below 6 GHz. 60/120kHz SCS values were used in frequency range 2(FR2), with CBW up to 400MHz, where FR2 represents the frequency range of 24.25-52.6 GHz or millimeter wave frequency band. These different SCS's allow the use of different types of NR parameter sets (numerologies) that provide different radio frame structures with different bandwidths.

NR will operate over a very wide bandwidth and the network will not experience any problems, such as the BS or gNB and high end UEs handling the entire operating band, but not every type of UE can use this broadband operation. Thus, even if the full bandwidth is not used, the concept of bandwidth part (BWP) may allow low end UEs that may not require the full-bandwidth system bandwidth to operate in the broadband system of NR. In this concept, only a sub-range of the overall system bandwidth is provided.

In an LTE system with a single 15kHz SCS option, barring means that the entire system using 20MHz will be barred, which is the maximum bandwidth of the LTE system. However, in the NR system, since the system uses a wider bandwidth, only a part of the bandwidth of the system bandwidth may be prohibited. Disabling only a sub-frequency range of the entire system bandwidth may make the disabling functionality more flexible, since even if a certain frequency range of the system bandwidth is disabled for a UE, the UE may use another frequency range within the same frequency band. Thus, not the entire system bandwidth is prohibited.

The BS such as the gNB may periodically transmit a synchronization signal PSS/SSS and a broadcast channel PBCH.

For initial access, a synchronization signal block (SSB/SS block) is defined. The 4-symbol SSB includes a 1-symbol PSS, a 1-symbol SSS, and a 2-symbol PBCH, and additional words. Once the UE is powered on, the UE finds a good beam for the cell during synchronization and decodes the MIB transmitted on the PBCH. The MIB or RMSI may include a cell disable indication for that cell found during cell search of the UE, and the UE does not attempt to connect to that cell. This may be the case only for the current cell associated with the current SSB.

By not connecting to the particular cell, the UE cannot use the entire system bandwidth of the cell, which may be a very wide frequency range. However, it may be desirable to not bar the entire bandwidth of the call, but only a certain frequency range or sub-range of the bandwidth provided by the cell. Thus, the processing unit of the BS may be adapted to determine a frequency range and/or a frequency sub-range of the system bandwidth and/or a frequency sub-range of the cell bandwidth forbidden for a predetermined user equipment.

Therefore, one wideband carrier can be divided using a plurality of SSBs.

The processing unit in the UE may be further adapted to ignore a cell barring indication received by the UE within the MIB, and which cell barring indication will indicate that the UE shall bar the entire cell. Instead of using the barring indication in the MIB, the processing unit is adapted to detect a frequency range within a combination of PBCH and RMSI (PBCH/RMSI) and to use the frequency range and/or frequency sub-range to access only a part of the cell frequency range: i.e. frequency ranges that are not disabled. Thus, transmitting a frequency range and/or frequency sub-range from the BS to the UE may allow for barring only a portion of the cell bandwidth.

According to another aspect of the invention, a program element is provided, which, when being executed by a processing unit, is adapted to carry out one of the methods of the invention.

According to another aspect of the invention, a computer-readable medium is provided comprising program code adapted to perform one of the inventive methods when executed by a processing unit.

The computer readable medium may be a floppy disk, a hard disk, a USB (universal serial bus) memory device, a RAM (random access memory), a ROM (read only memory), or an EPROM (erasable programmable read only memory). The computer readable medium may also be a data communication network, such as the internet, which may allow downloading of the program code.

According to another aspect of the invention, the frequency range is provided as a frequency list, wherein each frequency in the frequency list is a frequency forbidden for a predetermined user equipment.

In an example, the PBCH/RMSI includes a list of frequencies that are forbidden for the UE. The first system information received by the UE is MIB transmitted in PBCH channel. The next relevant System Information (SI) is RMSI, also called SIB1 (system information block type 1), which will transmit SIB1 in the PDSCH (physical data shared channel) channel. For each frequency in the frequency list, there is an associated SSB. The frequency list comprises individual frequency values.

A single frequency value may also be considered a range of frequencies. In another example, the list of frequencies is a list of particular frequency values and/or bandwidth values. The values of the list describe areas or ranges in the frequency domain that the particular UE cannot use. These values are blocked for the UE and the UE does not attempt to use these frequencies to communicate with the network and/or the BS. In another example, the values may be time dependent such that different bandwidth portions and/or frequency values may be allocated to the UE from time to time and may be prohibited at other times.

According to another aspect of the invention, each frequency in the frequency list further comprises a Physical Cell Identity (PCI) list, wherein the list of physical cell identities indicates that physical cell identities and frequencies are forbidden for a predetermined user equipment.

In an example, the PBCH/RMSI also includes a list of PCIs for each frequency in the list of frequencies. The PCI list indicates that the UE is prohibited from using the PCI and frequency. In other words, PCI is a cell indication on a physical level. By means of the PCI, the detected cell can be identified by the UE. Each frequency may have multiple PCIs owned by different cells. The PCI list may be a sequence of physical cell IDs and provides a relationship between the forbidden frequency and the PCI list.

By disabling a frequency, all cells using that frequency can be substantially disabled regardless of PCI. However, if a PCI is specified, then substantially only cells of that frequency and having that PCI will be barred. Thus, instead of disabling the entire frequency, it may be disabled only if some cells use it. While other cells that use the frequency and are not barred may still use the frequency. Thus, a more flexible frequency limitation is achieved.

According to another aspect of the invention, each frequency and/or frequency value in the frequency list further comprises a forbidden bandwidth for the predetermined user equipment.

The bandwidth may be a range around a certain frequency. The frequency range is indicated by providing a bandwidth, however, the exact location of the frequency range is not defined. Each frequency value can be used as an offset to specify the exact location of the frequency range. In one example, the range may be indicated by a list of individual frequencies that form the range.

According to another aspect of the invention, the frequency range is provided as a frequency and frequency offset list, wherein frequencies derived from the frequency and frequency offset list are barred for a predetermined user equipment.

In this example, the frequency offset list is a list of frequency values that define a range of frequencies that are prohibited from that frequency as a reference value. In yet another example, the PBCH/RMSI includes a list of frequencies and frequency offsets from which derived frequencies are prohibited for the UE. For example, there is one frequency used as a baseline and another frequency will be determined from the baseline and an offset.

According to another aspect of the invention, each frequency and/or each frequency offset of the list of frequency offsets further comprises a list of physical cell identities, wherein the list of physical cell identities indicates that physical cell identities and frequencies and/or frequency offsets are barred for a predetermined user equipment. Using the PCI list may allow frequencies to be blocked only when certain cells use the frequencies. Thus, the pci list may reduce the range of forbidden cells and allow for more flexible frequency barring.

For example, the PBCH/RMSI also contains a list of PCIs for each frequency or each frequency offset in the list of frequencies. In other words, in one example, a sequence of tuples of two values forms a list. The PCI list indicates that the PCI and the frequencies derived from the frequency offset list are forbidden for the UE. In yet another example, the PBCH/RMSI also contains a bandwidth corresponding to each frequency. In other words, the frequency may be used as a basis for a bandwidth around the frequency.

According to an aspect of the invention, the processing unit is adapted to transmit information of the frequency range to the predetermined user equipment via a combination of the physical broadcast channel and the remaining system information. Such a combination may be denoted as PBCH/RMSI. The PBCH/RMSI establishes a communication channel between the BS and the UE for exchanging barring information. By using PBCH/RMSI, the barring information provided in the MBI may be ignored.

According to an aspect of the invention, the frequency range is a sub-range of the aggregated bandwidth and/or the frequency range is a carrier bandwidth part.

Other frequency ranges of the cell may be used for the UE by only prohibiting sub-ranges of the cell bandwidth, system bandwidth, channel bandwidth, and/or carrier bandwidth. In NR, each cell may provide a region having a wide frequency range. By barring the entire cell of a certain UE, the entire frequency range may be made unavailable. Limiting only a sub-range of the cell bandwidth, system bandwidth, and/or carrier bandwidth may allow flexible use of the wide bandwidth of the cell. Thus, bandwidth adaptation is possible.

According to an aspect of the invention, the processing unit is adapted to transmit the frequency range to a specific group of predetermined user equipments.

In this way, only predefined UE types may be prohibited from accessing a certain frequency range.

According to another aspect of the invention, the processing unit is adapted to transmit the frequency range as a parameter set signal sequence to a predetermined user equipment.

Signaling the frequency range or the list of frequency values as a set of parameters may allow for the use of a channel established between the UE and the BS, e.g., PBCH and/or PBCH/RMSI.

According to an aspect of the present invention, the potential frequencies and/or potential frequencies or cells and/or cells may be barred based on a probability and/or barred timer (which may be T1), and both parameters (e.g., the values of the probability and the timer) are provided by the BS. For the first parameter, the UE may access the prohibited frequency and/or the prohibited plurality of frequencies and/or the cell and/or the plurality of cells based on the probability. For the second parameter, if the UE finds it barred, the UE may attempt to access the same frequency or cell after the expiration of T1. In other words, after the UE detects that it cannot access certain frequencies and/or cells, the UE waits for the set timer T1 to expire and may then attempt to access the barred frequency and/or barred frequencies and/or cells again.

It has to be noted that aspects of the present invention have been described with reference to different subject-matters. In particular, some aspects have been described with reference to apparatus type claims, while other aspects have been described with reference to method type claims. However, a person skilled in the art will gather from the above and the following description that, unless other notified, in addition to any combination between features belonging to one type of subject-matter also any combination between features relating to different types of subject-matters is considered to be disclosed with this document. In particular, combinations between features relating to apparatus type claims and features relating to method type claims are considered disclosed.

Drawings

Other embodiments of the invention are described in the following description of the figures. The invention is explained in detail below by way of example and with reference to the accompanying drawings, in which:

fig. 1 shows a communication system including a base station and a user equipment according to an exemplary embodiment of the present invention.

Fig. 2 shows communication channels in a time domain and frequency domain representation according to an exemplary embodiment of the present invention.

Fig. 3 illustrates a structure of an SSB according to an exemplary embodiment of the present invention.

Fig. 4 illustrates bandwidth allocation to different UEs of a carrier according to an exemplary embodiment of the present invention.

Fig. 5 illustrates a time-frequency diagram with BWP according to an exemplary embodiment of the present invention.

Detailed Description

In the following, the same reference numerals will be used for components having the same or equivalent functions. Any statement as to the orientation of parts is made with respect to the positions shown in the drawings and may, of course, vary from one actual position to another.

Fig. 1 shows a communication system 100 comprising a Base Station (BS)101 and a User Equipment (UE)102 according to an exemplary embodiment of the invention.

The BS 101 comprises a first processing unit 103, a second processing unit 104 and a transceiver 105. The first processing unit is adapted to determine forbidden frequency ranges 106', 106 "for a predetermined user equipment 102. The forbidden frequency ranges 106', 106 "cannot be used by the UE102 when using the communication channel 107 allocated by the second processing unit 104 and used for communication between the UE102 and the BS 101. The BS generates a cell with a communication channel 107 having a cell bandwidth 108, a carrier bandwidth 108, and/or a system bandwidth 108. The system bandwidth 108 may be an aggregate bandwidth and/or bandwidth portion and may have a frame structure built from subcarrier spacing (SCS). The system can use a very wide bandwidth.

However, UE102 may be adapted to use only a portion 109 of system bandwidth 108 or channel BW 108. In some cases, the UE102 does not even attempt to connect to the forbidden frequency ranges 106', 106 "when the UE102 performs cell search and prevents checking for forbidden frequencies.

Which portion 106 ', 106 "and/or which frequency range 106', 106" is forbidden for the UE102 and therefore cannot be used by the UE102 is communicated from the BS 101 to the UE102 via the PBCH 110, in particular via the PBCH/RMSI 110.

In New Radio (NR) systems, the cell restriction mechanism may be different from Long Term Evolution (LTE) because of the wider bandwidth in NR systems, e.g., 100MHz in low frequency, 400MHz in high frequency, multiple SSBs in NR systems containing Primary Synchronization Signal (PSS)/Secondary Synchronization Signal (SSS)/Physical Broadcast Channel (PBCH) and Remaining Minimum System Information (RMSI) or remaining minimum SI, and because there is no bandwidth information in the Master Information Block (MIB) like LTE.

Fig. 3 illustrates the structure of an SSB 300 according to an exemplary embodiment of the present invention. The SSB 300 includes PSS 301, SSS 302, and

PBCH

303a, 303b, 303c, 303 d. These functional blocks are arranged in a frame structure. The PSS 301 is arranged at OFDM (orthogonal frequency division multiplexing) symbol number 0 and ranges from subcarrier numbers 56 to 182. The SSS 302 is arranged at OFDM symbol number 2 and ranges from subcarrier number 56 to 182. The PBCH includes four

PBCH sub-blocks

303a, 303b, 303c, 303 d. The first sub-block 303a is arranged at OFDM symbol number 1 and ranges from subcarrier number 0 to 239, the second sub-block 303b is arranged at OFDM symbol number 2 and ranges from subcarrier number 0 to 47, the third sub-block 303c is arranged at OFDM symbol number 2 and ranges from subcarrier number 192 to 239, and the fourth sub-block 303d is arranged at OFDM symbol number 3 and ranges from subcarrier number 0 to 239.

The remaining minimum SI (rmsi) is the minimum SI of a UE that may be served in a cell and thus may obtain service in the cell. The RMSI is provided to the UE by the BS and/or the cell. The minimum SI may be SIB1 in NR. In contrast to NR in LTE, bandwidth information is transmitted in SIB1, e.g., the transmission rate of one cell (downlink, i.e., DL in the direction from BS 101 to UE 102) is 20 MHz.

Multiple SSBs 300 may be transmitted within a frequency span of the carrier used by the serving cell. However, from the perspective of the UE102, each serving cell is associated with at most a single SSB. In other words, for a UE, a certain cell is associated with a single SSB.

Fig. 4 illustrates bandwidth allocation of carriers 400 to

different UEs

102a, 102b, 102c according to an exemplary embodiment of the invention. This FIG. 4 shows a scenario with multiple SSBs 300a, 300b, 300c, 300 d. In other words, fig. 4 shows a diagram of UEs and/or corresponding bandwidths associated with certain cells. In the example of fig. 4, four SSBs (SSB 1300 a, SSB 2300 b, SSB 3300 c, SSB 4300 d) are used for the carrier bandwidth. The carrier 400 may be assigned to a plurality of cells identified by an NR Cell Global Identifier (NCGI). In fig. 4, within the carrier 400, two different cells are identified. The first cell 401a may be identified by NCGI-5 and associated with SSB1, and the second cell 401b may be identified by NCGI-6 and associated with SSB 3. Other frequencies may be disabled. The

cells

401a, 401b may have overlapping bandwidth portions (BWPs). In one example, the UE102 is configured to perform RRM (radio resource management) measurements on each of the available SSBs (i.e., SSBs 1, SSBs 2, SSBs 3, and SSBs 4) to find a cell to attach to. In fig. 4, three

UEs

102a, 102b, 102c are shown. As indicated by the initial BWPs 402a, 402b, the two

UEs

102a, 102b are connected to the same cell with NCGI 5. UE102 c is connected to another cell with NCGI 6 as indicated by initial BWP 402 c. In addition, the

UEs

102a, 102b, 102c have a dedicated BWP allowing scaling of the bandwidth. Initial BWP 402a and initial BWP 402b are associated with SSB1, NCGI 5, and initial BWP 402c is associated with SSB3, NCGI 6. Other bandwidths may be allocated as private BWP1 and private BWP 2. Thus, each UE102 a, 102b, 102c may have a different allocated bandwidth and need not use the entire system bandwidth.

To ensure that the user equipment 102 does not communicate using the prohibited frequency ranges 106', 106 ", the UE102 comprises a processing unit 111, a communication means 112 and a transceiver 113. The transceiver 113 is adapted to receive information for frequency ranges forbidden by the user equipment via the PBCH 110. In particular, the UE102 receives information about forbidden frequency ranges, e.g. in the form of a frequency list. And the processing unit 111 is adapted to prevent the UE102 from attempting to access the forbidden frequency ranges 106', 106 ". In other words, the processing unit 111 ensures that when the UE establishes the communication channel 107 with the BS 101, the UE uses only the available portion 109 of the system bandwidth. Thus, when exchanging information between the UE102 and the BS 101 via the UE transceiver 113, the UE's communication device 112 uses only the available portion 109 of the communication channel 107. The processing unit 111 and the communication device 112 may be implemented by different processors, or the processing unit 111 and the communication device 112 may be integrated into one processor.

The communication channel may be provided as a frame structure comprising resource units and/or resource blocks.

Fig. 5 illustrates a time-frequency diagram 500 with different bandwidth portions (BWPs) according to an exemplary embodiment of the present invention. This concept is used to divide the system bandwidth 108 into different portions of bandwidth BWP 1501 a, 501b, BWP 2502 a, 502b, BWP 3503.

With Bandwidth Adaptation (BA), the reception bandwidth and transmission bandwidth of the UE102 need not be as large as the bandwidth of the entire cell and can be adjusted. The BS 101 may instruct the UE to change the bandwidth. In one example, during periods of low activity, bandwidth may be reduced to conserve power. The position of the allocated

BWPs

501a, 501b, 502a, 502b, 503 may be shifted in the frequency domain, e.g. to increase scheduling flexibility. Also, the subcarrier spacing may be adjusted, for example, to enable different services. A subset of the total cell bandwidth of the cell is referred to as bandwidth part (BWP) BWP1, BWP2, BWP3, and the BA is implemented by configuring BWP to the UE102 and informing the UE102 which of the configured BWPs is currently the active one. Other portions of the time-frequency domain 500 may be disabled to prevent use of the other portions. In fig. 5, three different BWPs, BWP1, BWP2, BWP3, are configured. BWP1 uses a bandwidth of 40MHz and a subcarrier spacing of 15kHz and is allocated as two

portions

501a, 501b extending along a time axis 504. BWP2 uses a bandwidth of 10MHz and subcarrier spacing of 15kHz and is allocated as two

portions

502a, 502b extending along time axis 504. BWP3 uses a bandwidth of 20MHz and subcarrier spacing of 60kHz and BWP3 is a continuous time range along time axis 504. Different bandwidths are indicated by different widths of the blocks along the frequency axis 505. In one example, the bandwidth is arranged around the SCS along the frequency axis.

In order to inform the UE102 about the forbidden frequency ranges 106', 106 ", a number of different options may be selected. The RMSI and/or SIB includes cell barring information, which is a frequency list, or a frequency list and a PCI list, or a frequency and frequency offset list, or a frequency, frequency offset list and a PCI list.

In one example, the RMSI sent to the UE102 via the PBCH 110 may include a list of prohibited frequencies. Such a frequency list may include frequency values that are not usable by the UE, e.g., 100MHz for f1, 101MHz for f2, … …, 150MHz for fn, to prohibit the frequency ranges 106', 106 "from 100MHz to 150 MHz. The frequency list in the example may include only individual frequency values and not range values.

In another example, the forbidden frequency ranges 106', 106 "are provided as a list of PCIs for each frequency in the frequency list. For example, BS 101 has PCI 10035. The information transmitted from the BS 101 to the UE is then in the form of a frequency followed by a PCI value indicating that the frequency and all PCIs cannot be used by the UE.

The structure of such a list may be:

the frequency of the wave is 100MHz, and the frequency of the wave is 100MHz,

PCI 23，

PCI 45

frequency 200MHz

PCI 46，

PCI 49

；；；；；；

For the UE receiving the list, if a frequency is provided from a cell having a PCI different from 23 or 45, the frequency 100MHz may be used.

In another example, the forbidden frequency ranges 106', 106 "are provided to also include a list of bandwidths corresponding to each frequency. For reference to the forbidden frequency range from 100MHz to 150MHz for the UE102, such a list may include only two values, i.e., f 1-100, BW 1-50.

In another example, the forbidden frequency ranges 106', 106 "are provided as a list including a list of frequencies and frequency offsets.

The list may additionally include a list of PCIs for each frequency and/or bandwidth.

The general structure that may be used to send the list of frequency ranges to the UE102 may have the following format written as an information element:

partial Bandwidth forbidden (Partial Bandwidth Barring) containing great last distance

Frequency (Frequency)

Bandwidth (Bandwidth) < optional >

PCI List (PCI List) < optional >

Forbidden or not (barred or not) }

In this list, a value denoted as < optional > may be optionally added. The value "forbidden" may indicate that the corresponding frequency is forbidden for the UE. The value "not barred" may indicate that the corresponding frequency is not barred for that UE102 and may be used by the UE 102.

The offset values in the frequency list are offsets relative to the frequencies transmitted by the network, where the network may decide the offset and the amount of computation depending on the implementation.

The frequency list may be transmitted in the PBCH as a standard RMSI message, e.g. as shown in fig. 3.

Fig. 2 shows a communication channel 107 in time and frequency domain representation according to an exemplary embodiment of the present invention. The time domain is indicated by arrow 201. The frequency domain is indicated by arrow 202. The blocks 206 ', 206 "', 206" "' represent forbidden frequency ranges in the time and frequency domains.

It should be noted that the term "comprising" does not exclude other elements or steps and the "a" or "an" does not exclude a plurality. Also elements described in association with different embodiments may be combined.

It should also be noted that reference signs in the claims shall not be construed as limiting the scope of the claims.

List of reference numerals

100 communication system

101 base station

102 user equipment

102a user equipment 1

102b user equipment 2

102c user equipment 3

103 first processing unit

104 second processing unit

105 transceiver

106', 106 "forbidden frequency ranges

107 communication channel

108 system bandwidth

109 available portion of system bandwidth

110 Physical Broadcast Channel (PBCH)

111 processing unit

112 communication device

113 user equipment transceiver

201 time domain

202 frequency domain

206 ', 206 "', 206" "' forbidden frequencies in time and frequency domains

300 Synchronous Signal Block (SSB)

300a SSB1 of a plurality of SSBs

300b SSB2 of a plurality of SSBs

300c SSB3 of a plurality of SSBs

300d SSB4 of multiple SSBs

301 Primary Synchronization Signal (PSS)

302 auxiliary synchronous signal (SSS)

303a, 303b, 303c, 303d Physical Broadcast Channel (PBCH)

400 carrier wave

401a first cell

401b second cell

402a, 402c401a initial bandwidth portion (BWP)

500 time-frequency diagram

501a, 501b Bandwidth portion 1(BWP1)

502a, 502b Bandwidth portion 2(BWP2)

503 Bandwidth portion 3(BWP3)

504 time axis

505 frequency axis

Claims

1. A base station (101), the base station (101) comprising:

a processor (103) for processing a plurality of data,

wherein the processor (103) is adapted to determine a forbidden frequency range (106', 106 ") for a user equipment; and

a transceiver (105), the transceiver (105) being adapted to transmit information of the frequency range (106', 106 ") to the user equipment (102); wherein the content of the first and second substances,

each frequency in the frequency range further comprises a list of physical cell identities; forbidding a corresponding frequency for the user equipment when the cell with the physical cell identification uses the corresponding frequency; allowing the user equipment to use a corresponding frequency when a cell without the physical cell identity uses the corresponding frequency; the list of physical cell identities is used to indicate cells and frequencies to which the user equipment (102) is barred from accessing when identifying the detected cells; the physical cell identity characterizes a cell indication on a physical level.

2. The base station (101) of claim 1, wherein the information of the frequency ranges (106', 106 ") is provided as a frequency list, wherein each frequency in the frequency list is a frequency forbidden for the user equipment.

3. The base station (101) of claim 2, wherein each frequency in the list of frequencies further comprises a bandwidth forbidden for the user equipment.

4. The base station (101) according to claim 1, wherein the information of the frequency range (106', 106 ") is provided as a list of frequencies and frequency offsets, wherein the physical cell identity and frequencies and/or the frequency offsets derived from the list of frequencies and frequency offsets are forbidden for a predetermined user equipment.

5. The base station (101) of any of claims 1-4, wherein the first processing unit is adapted to transmit information of the frequency range (106', 106 ") to the user equipment (102) via a combination of a physical broadcast channel and remaining system information.

6. The base station (101) of any of claims 1-4, wherein the frequency range is a sub-range of an aggregate bandwidth (108) and/or wherein the frequency range is a carrier bandwidth part.

7. The base station (101) of any of claims 1-4, wherein the transceiver (105) is adapted to transmit information of the frequency ranges (106', 106 ") to a specific group of user equipments.

8. The base station (101) of any of claims 1-4, wherein the transceiver (105) is adapted to transmit the frequency ranges (106', 106 ") as a sequence of digital signals to the user equipment (102).

9. A user equipment (102), the user equipment (102) comprising:

a processing unit (111) and a transceiver (113);

wherein the transceiver (113) is adapted to receive information for frequency ranges (106', 106 ") disabled for the user equipment (102); and

wherein the processing unit (111) is adapted to prevent the user equipment (102) from attempting to access the frequency range; wherein the content of the first and second substances,

10. The user equipment (102) according to claim 9, wherein the information of the frequency ranges (106', 106 ") is provided as a frequency list, wherein each frequency in the frequency list is a frequency forbidden for the user equipment.

11. The user equipment (102) of claim 10, wherein each frequency in the list of frequencies further comprises a bandwidth forbidden for the user equipment.

12. The user equipment (102) according to any one of claims 9-11, further comprising:

a communication device (112);

the communication device is connected to the transceiver (113) and/or to the processing unit (111).

13. The user equipment (102) according to any of claims 9-11, wherein the user equipment is adapted to receive the frequency range (106', 106 ") as a sequence of digital signals.

14. A method for disabling, the method comprising:

determining a forbidden frequency range for the user equipment;

transmitting information of the frequency range to the user equipment; wherein the content of the first and second substances,

each frequency in the frequency range further comprises a list of physical cell identities; forbidding a corresponding frequency for the user equipment when the cell with the physical cell identification uses the corresponding frequency; allowing the user equipment to use a corresponding frequency when a cell without the physical cell identity uses the corresponding frequency; the list of physical cell identities is used to indicate cells and frequencies to which the user equipment is barred from accessing when identifying the detected cells; the physical cell identity characterizes a cell indication on a physical level.

15. The method of claim 14, wherein the information of the frequency range is provided as a frequency list, wherein each frequency in the frequency list is a frequency prohibited for the user equipment.

16. The method of claim 15, wherein each frequency in the list of frequencies further comprises a bandwidth prohibited for the user equipment.

17. The method according to claim 14, wherein the information of the frequency range is provided as a list of frequencies and frequency offsets, wherein the physical cell identity and frequencies and/or the frequency offsets derived from the list of frequencies and frequency offsets are forbidden for a predetermined user equipment.

18. The method according to any of claims 14-17, wherein the transmitting information of the frequency range to the user equipment comprises: transmitting information of the frequency range to the user equipment via a combination of a physical broadcast channel and remaining system information.

19. The method according to any of claims 14 to 17, wherein the frequency range is a sub-range of an aggregate bandwidth and/or wherein the frequency range is a carrier bandwidth part.

20. The method according to any of claims 14-17, wherein the transmitting information of the frequency range to the user equipment comprises: transmitting information of the frequency range to a specific user equipment group.

21. The method according to any of claims 14-17, wherein the transmitting information of the frequency range to the user equipment comprises: transmitting the frequency range to the user equipment as a sequence of digital signals.

22. A method for blocking access, the method comprising:

receiving information of a forbidden frequency range;

refraining from attempting to access the frequency range; wherein the content of the first and second substances,

each frequency in the frequency range further comprises a list of physical cell identities; forbidding the corresponding frequency for the user equipment when the cell with the physical cell identification uses the corresponding frequency; allowing the user equipment to use a corresponding frequency when a cell without the physical cell identity uses the corresponding frequency; the list of physical cell identities is used to indicate cells and frequencies to which the user equipment is barred from accessing when identifying the detected cells; the physical cell identity characterizes a cell indication on a physical level.

23. The method of claim 22, wherein the information of the frequency range is provided as a frequency list, wherein each frequency in the frequency list is a frequency prohibited for the user equipment.

24. The method of claim 23, wherein each frequency in the list of frequencies further comprises a bandwidth prohibited for the user equipment.

25. The method of any of claims 22 to 24, wherein receiving information of forbidden frequency ranges comprises: the frequency range is received as a sequence of digital signals.

26. A computer readable medium comprising program code adapted to perform the method of any of claims 14 to 21 when the program code is executed by a processing unit.

27. A computer readable medium comprising program code adapted to perform the method of any of claims 22 to 25 when the program code is executed by a processing unit.