CN116915372A

CN116915372A - Wireless communication method, network device, computer readable medium

Info

Publication number: CN116915372A
Application number: CN202310668005.0A
Authority: CN
Inventors: 刘星; 帕特里克·斯韦德曼; 郝鹏; 毕峰
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2017-09-11
Filing date: 2017-09-11
Publication date: 2023-10-20
Also published as: WO2019047228A1; CN111066357B; CN111066357A

Abstract

The present application relates to an information transmission system, and more particularly, to a method of wireless communication, comprising: logically grouping transmission resources available for transmitting synchronization signals/physical broadcast channel blocks (SSBs) into a plurality of SSB groups; and transmitting information about the location of the actually transmitted SSB in a message comprising: a first field indicating the number of SSB groups; and a second field indicating a pattern of actually transmitted SSBs within each SSB group including the actually transmitted SSBs; wherein the index of the first group containing the actually transmitted SSBs depends on the system parameters.

Description

Wireless communication method, network device, computer readable medium

The application relates to a divisional application of Chinese patent application with the application number of 201780094789.3 and the application date of 2017, 9, 11 days and the title of information transmission system.

Technical Field

This document relates to systems, devices, and methods for wireless communications.

Background

There is currently an ongoing effort to define next generation wireless communication networks that provide greater deployment flexibility, support multiple devices and services, and different technologies for efficient bandwidth utilization. Techniques such as using multiple antennas for transmission and/or reception are also used for better bandwidth utilization.

Disclosure of Invention

This document describes, among other things, techniques for communicating and using timing information related to a wireless communication network.

In one example aspect, a method for wireless communication includes: logically grouping transmission resources available for transmitting synchronization signals/physical broadcast channel blocks (SSBs) into a plurality of SSB groups; and transmitting information about the location of the actually transmitted SSB in a message comprising: a first field indicating the number of SSB groups; and a second field indicating a pattern of actually transmitted SSBs within each SSB group including the actually transmitted SSBs; wherein the index of the first SSB group containing the actually transmitted SSBs depends on the system parameters.

In another example aspect, a method of wireless communication is disclosed. The method comprises the following steps: receiving information about the location of an actually transmitted synchronization signal/physical channel broadcast block (SSB) in a message comprising: a first field indicating the number of SSB groups; and a second field indicating a pattern of SSBs within each SSB group including the actually transmitted SSBs; wherein all transmission resources available for transmitting SSBs are logically grouped into a plurality of SSB groups; and determining an index of the first SSB group including the actually transmitted SSBs using the system parameters.

In yet another example embodiment, a method of wireless communication is disclosed. The method comprises the following steps: logically grouping transmission resources available for transmitting synchronization signals/physical broadcast channel blocks (SSBs) into a plurality of SSB groups; and transmitting information about the location of the actually transmitted SSB in a message comprising: a first field indicating a pattern of SSB groups including SSBs actually transmitted; and a second field indicating the number of SSBs within each SSB group containing the actually transmitted SSBs; wherein the index of the first SSB within each SSB group containing the actually transmitted SSB depends on the system parameters.

In yet another example embodiment, a method of wireless communication is disclosed. The method comprises the following steps: receiving information about the location of an actually transmitted synchronization signal/physical channel broadcast block (SSB) in a message comprising: a first field indicating a pattern of SSB groups including SSBs actually transmitted; and a second field indicating the number of SSBs within each SSB group containing the actually transmitted SSBs; wherein the index of the first SSB within each SSB group containing the actually transmitted SSB depends on the system parameters; and determining an index of the first SSB within each SSB group containing the actually transmitted SSBs using the system parameters.

In yet another example embodiment, a method of wireless communication is disclosed. The method comprises the following steps: allocating transmission resources available for transmitting synchronization signals/physical broadcast channel blocks (SSBs) to a plurality of SSB transmissions; and transmitting information about the location of the actually transmitted SSB in a message comprising: a first field indicating the number of SSBs actually transmitted; and a second field indicating an interval between two adjacent actually transmitted SSBs; wherein the index of the SSB of the first actual transmission depends on the system parameters.

In yet another example embodiment, a method of wireless communication is disclosed. The method comprises the following steps: receiving information about the location of an actually transmitted synchronization signal/physical broadcast channel block (SSB) in a message comprising: a first field indicating the number of SSBs actually transmitted; and a second field indicating an interval between two adjacent actually transmitted SSBs; wherein the index of the first actually transmitted SSB depends on the system parameters; and determining an index of the first actually transmitted SSB using the system parameters.

In yet another example aspect, a wireless communication apparatus comprising a memory and a processor is disclosed. The memory is configured to store code executable by the processor. The processor is configured to read the code and implement the methods described herein.

In another example aspect, the various methods described herein may be implemented as processor executable code and stored on a computer readable program medium.

The details of one or more implementations are set forth in the accompanying drawings and the description below. Other features will be apparent from the description and drawings, and from the claims.

Drawings

Fig. 1 illustrates an example scheme for transmitting a Synchronization Signal (SS) burst set (burst set) in a multi-beam wireless system.

Fig. 2A illustrates an example bitmap for indicating information transport blocks in a wireless network.

Fig. 2B illustrates another example bitmap for indicating information transport blocks in a wireless network.

Fig. 2C illustrates another example bitmap for indicating information transport blocks in a wireless network.

Fig. 2D illustrates another example bitmap for indicating information transport blocks in a wireless network.

Fig. 3A illustrates another example bitmap for indicating information transport blocks in a wireless network.

Fig. 3B illustrates another example bitmap for indicating information transport blocks in a wireless network.

Fig. 4 illustrates another example bitmap for indicating information transport blocks in a wireless network.

Fig. 5 shows an example of an information transmission scheme in which cell level information and beam level information are transmitted through a wireless channel.

Fig. 6 is a flow chart illustrating an example method for wireless communication.

Fig. 7 is a flow chart illustrating an example method for wireless communication.

Fig. 8 is a flow chart illustrating an example method for wireless communication.

Fig. 9 is a flow chart illustrating an example method for wireless communication.

Fig. 10 is a flow chart illustrating an example method for wireless communication.

Fig. 11 is a flow chart illustrating an example method for wireless communication.

Fig. 12 is a block diagram of an example embodiment of a wireless communication device.

Fig. 13 is a block diagram of an example of a wireless communication system.

Like reference symbols in the various drawings indicate like elements.

Detailed Description

Section headings are used in this document to aid ease of understanding and do not limit the scope of the disclosed technology to this section. A user equipment or terminal as used herein may be an electronic device capable of wireless transmission. Examples include mobile phones, notebook computers, tablet computers, loT devices, and the like.

With continued advancement in radio technology, wireless communication products and services are evolving vigorously. For growth, the wireless industry is seeking to address the problem of limited available spectrum for communications. As the demand for bandwidth increases, traditional commercial communications that use primarily about 300MHz of spectrum may not meet the ever-increasing demand unless new technologies are introduced that improve spectrum usage.

In future wireless communications, communications may be conducted using a carrier frequency that is higher than the carrier frequency used by the 4 generation (4G) communications system. The new frequency band may be, for example, in the range of 28GHz, 45GHz, 70GHz, etc. Signal transmission at high frequencies suffers from significant propagation losses even through the atmosphere (e.g., due to the absorption of energy by air molecules such as oxygen molecules). In addition, the occurrence of rain or other weather phenomena may also affect the available bandwidth at these frequencies. However, since the carrier frequency corresponding to high-frequency communication has a shorter wavelength, more antenna elements can be accommodated per unit area, and more antenna elements means that beamforming can be used to improve antenna gain. Such techniques may thus ensure that a wireless network may provide a significant throughput even at high frequencies.

Using beamforming methods, the transmitter may concentrate the transmitted energy in a particular direction while the energy is small or 0 in other directions, i.e., each beam has its own direction. Thus, each beam may cover only a specific direction of the terminal. The base station may thus provide full range coverage using a large number of transistors capable of transmitting beams in tens or even hundreds of directions. In some current networks, measurements and identification of the initial beam direction are made during initial access of the network by the terminal. To facilitate this, a synchronization signal/physical broadcast channel block (SSB, SS/PHCH block) is used. In each SSB, synchronization signals, system information, and corresponding demodulation reference signals (DMRS) (optionally including beam/port measurement reference signals and other signals) may be transmitted on multiple beams or ports depending on the number of radio frequency chains of the base station. The terminal may perform measurements using the synchronization signal, acquire system information, and may perform measurements on the optional reference signal to identify a preferred downlink transmit beam or port and acquire cell basic information, access configuration information, etc., to access the network. In some wireless systems, multiple SSB resources are defined within a synchronous broadcast transmission period (or burst phase period), the time domain locations of these SSB resources are fixed or predefined and the base station may transmit SSB signals with these resources. The base station may select some or all of the SSB resources for the actual transmission of the SSB. The base station may poll the terminal to identify the preferred base station side transmit beam/port for use by the terminal.

The location information of the actually transmitted SSB may also be used for rate matching of the terminal at the time of data reception. For example, for this purpose, the resources allocated to SSB transmission are removed on predetermined downlink data transmission resources, and the remaining resources are matched and received at the corresponding rate. On the other hand, actually transmitting SSB information may also be used to indicate SSB-based measurements. Therefore, this is useful for a terminal that notifies SSB location information actually transmitted.

Fig. 1 shows an example scheme in which an SS burst set includes multiple SSB transmissions, where each transmission corresponds to a different spatial direction or beam in which a terminal may exist in the network, as shown by an example radiation pattern below the SSB location.

In the prior art, for higher bandwidths above 6GHz, more SSB resources (e.g., 64) are used due to greater transmission loss. Even if suffering some transmission loss, the base station may therefore send SSBs multiple times to ensure detection by the terminal. Thus, the base station can trade off between resource utilization and ensure that the terminal receives SSBs. For example, a subset of all possible 64 potential SSB resources may actually be used for SSB transmission. To help notify that SSB is actually being used and at the same time save notification overhead, some rules are defined for each cell, such as SSB grouping instructions, etc. Terminals in all cells will operate according to the same rules to determine the SSB location and instruction actually transmitted. One operational problem with this approach is: in a synchronous network, the actual transmission of SSBs in different cells will suffer from a high probability of collision, and interference between neighboring cells will reduce SSB synchronization signals and reduce physical broadcast channel detection performance. In response to this problem, the current 3GPP standards do not propose an effective solution.

Some solutions have been proposed recently for this problem. These solutions make it possible to locate the position of the actual transmission SSB in the frequency band above 6 GHz. In the schemes described below, alt.2, alt.3, alt.4 refer to the selection of the starting index. For example, the start index in Alt.2 and Alt.4 refers to the SSB index in the SS/PBCH block group, and the start index in Alt.3 refers to the SS/PBCH block group index. In these embodiments, the default first SSB resource is defined as the starting index of the SSB that is actually transmitted, with the result that the SSB collision probability will actually increase, affecting channel reception performance. According to alt.5, 6-bit signaling is used to indicate different SSB start indexes that introduce specific signaling overhead.

In the case above 6GHz, the indication is in compressed form and the indication method is selected from the following alternatives.

Alternative 1 (alt.l): group-Bitmap) +bitmap in Group

A group is defined as a logical grouping of consecutive SS/PBCH blocks.

The bitmap in the group may indicate that the SS/PBCH is actually transmitted within the group, each group has the same pattern of SS/PBCH block transmissions, and the group-bitmap may indicate that the group is actually transmitted.

For example, in the case of 8 groups and 8 SS/PBCH blocks per group, the transmission would be an [8] + [8] bit.

Alt.2: group-bitmap + number of SS/PBCH blocks actually transmitted in group (starting index with fixed SS/PBCH blocks)

Groups are defined as consecutive SS/PBCH blocks.

The group-bitmap may indicate that the groups are actually transmitted, the SS/PBCH blocks within the groups are logically contiguous, the number of actually transmitted SS/PBCH blocks indicates how many logically contiguous SS/PBCH blocks were actually transmitted starting from the first index, and the number is typically applied to all transmitted groups.

For example, in the case of 8 groups and 8 SS/PBCH blocks per group, the [8] + [3] bit.

Alt.3: the Bitmap in the group + the number of actually transmitted groups (starting index with fixed group).

Groups are defined as consecutive SS/PBCH blocks.

The bitmap in a group may indicate which SS/PBCH block is actually transmitted within the group, each group has the same pattern of SS/PBCH block transmissions, and the number of actually transmitted groups indicates how many consecutive groups were actually transmitted from the first group.

Alt.4: group-bitmap + number of SS/PBCH blocks actually transmitted in each group

Groups are defined as consecutive SS/PBCH blocks.

The group-bitmap may indicate which group is actually transmitted, SS/PBCH blocks within the group are logically contiguous, and the number of SS/PBCH blocks actually transmitted for each group indicates how many logically contiguous SS/PBCH blocks were actually transmitted starting from the first index.

The minimum is [8] + [3] bit and the maximum is [8] + [3] [8] bit in the case of 8 groups and 8 SS/PBCH blocks in each group.

Alt.5: the number of actually transmitted SS/PBCH blocks + the start index + the interval between two consecutive SS/PBCH blocks

For example, the [6] + [6] + [6] bits are transmitted.

Alt.6: group-bitmap

Groups are defined as consecutive SS/PBCH blocks.

The group-bitmap may indicate which group was actually transmitted and all SS/PBCH blocks within the transmitted group were actually transmitted.

For example, bit 8 in the case of 8 groups and 8 SS/PBCH blocks per group.

Among other things, the present application provides techniques for transmitting time domain location information for control signal transmissions from a base station.

Various methods are described below with respect to the system. There are L resources defined as potential SS/PBCH block (SSB) transmission resources. For example, l=64. The gNB may select a portion of the resources that are actually transmitted. In some embodiments, the SSB location of the actual transmission (e.g., the time at which the transmission was made) may be indicated to the UE by an example of the following method:

Method 1:

the potential SSBs are logically divided into multiple SSB groups. The bitmap is used to indicate the SSB groups actually transmitted.

The number of actually transmitted SSBs in each SSB group containing the actually transmitted SSBs may also be indicated to the UE. In the described example, different SSB groups share the same pattern of actually transmitted SSBs. However, in general, different SSB groups may have different patterns.

Then, system parameters (such as a cell ID of a cell in which the UE is operating) will be further introduced for calculating a start index of the actually transmitted SSB in each SSB group containing the actually transmitted SSB (e.g., an index of the first actually transmitted SSB in each SSB group containing the actually transmitted SSB). In general, other system parameters that are known a priori by the UE (e.g., a portion of the base station's MAC address) may be used.

For example, consider the potential SSBs of n=8 in the SSB group and a total of 64 potential SSBs as examples. As shown in fig. 2A, 8 bits are used to indicate the actually transmitted SSB groups in a bitmap fashion, for example 10100011, meaning that there are 4 SSB groups (first, third, seventh, and eighth SSB groups) that will contain the actually transmitted SSB.

Another 3 bits are used to indicate the number of SSBs actually transmitted within the SSB group. For example 011, means that m=3 SSBs will actually be transmitted in one group.

Then, the UE calculates a start index of the SSB actually transmitted in the SSB group. For example, the UE calculates a start index of SSBs actually transmitted in the group using 'ncell_id mod X'. Where 'ncell_id' represents a cell ID, and 'X' represents the number of different start indexes of SSBs actually transmitted in a group. In this embodiment, 'ncell_id' is 580, and there are 'x=6' different starting indexes of SSBs actually transmitted in SSB groups in case of actually transmitting 3 SSBs in one group, i.e., candidate starting indexes of SSBs in SSB groups are { SSB0, SSB2, SSB3, SSB4, SSB5}. The value of 'X' is calculated using the following formula: x=n-m+1=8-3+1=6. As described above, N represents the number of potential SSBs in the SSB group, and M represents the number of SSBs actually transmitted in the SSB group.

58mod 6 = 4, which means that the start index of the SSB actually transmitted in each group of SSBs actually transmitted is SSB4, i.e. the fifth SSB and the consecutive 3 SSBs (i.e. SSB4, SSB5, SSB 6) in each group will actually be transmitted.

In summary, the indication information of the SSB position actually transmitted is '10100011011', 11 bits in total. The first 8 bits are used to indicate in a bitmap manner the SSB groups containing the actually transmitted SSBs, and the lower (rear) three bits are used to indicate the number of actually transmitted SSBs for each SSB group containing the actually transmitted SSBs. In alternative embodiments, the location of the information bits may be changed and may be known to the UE without limiting the manner described above.

From the above description, the actually transmitted SSBs are: { SSB4, SSB5, SSB6, SSB20, SSB21, SSB22, SSB52, SSB53, SSB54, SSB60, SSB61, SSB62}.

For determining the value of 'X' described above (the number of different starting indexes of SSBs actually transmitted in a group), the following assumptions have been made: consecutive SSB resources are occupied by the SSBs actually transmitted within one SSB group. In this case, the value of 'X' is a function of 'N' and 'M', i.e. x=n-m+1, where N represents the number of potential SSBs in the SSB group and M represents the number of SSBs actually transmitted in the SSB group.

The following method may also be used to determine the value of 'X':

method A: 'X' is equal to 'N'. In this case, the starting index may also be via formula' N _{cell_ID} mod X'. When there are not enough consecutive SSB resources in the SSB group, the mapping of the initial SSB resources in the same SSB group is continued. As shown in fig. 2D, assume N _{cell_ID} =582 and x=n=8, then N _{cell_ID} mod x=552 mod 8=6, i.e. the starting SSB is the seventh SSB resource (group 0 has a starting index of 6). Assume that there are 3 actually transmitted SSBs in one SSB group. The three SSBs are SSB6, SSB7, SSB0.

Method B: 'X' is equal to 'N'. In this case, the starting index may also be via formula' N _{cell_ID} mod X'. When there are not enough consecutive SSB resources in the SSB group, the mapping of the initial SSB resources in the next SSB group is continued. As shown in fig. 2B, assume N _{cell_ID} =582 and x=n=8, then N _{cell_ID} mod x=582 mod 8=6. I.e. the starting SSB is the seventh SSB resource (group 0 has a starting index of 6). Assume that there are 3 actually transmitted SSBs in one SSB group. The three SSBs are SSB6, SSB7, SSB8.

When the SSB group is the last group, then the initial SSB resources of the first SSB group will also be mapped. As shown in fig. 2C, assume N _{cell_ID} =582 and x=n=8, then N _{cell_ID} mod x=582 mod 8=6. I.e. the starting SSB is the seventh SSB resource (starting index of SSB group 7 is 62). Assume that there are 3 actually transmitted SSBs in one SSB group. Then these three SSBs are SSB62, SSB63, SSB0.

Method 2:

potential SSBs are grouped into SSB groups. The bitmap is used to indicate the SSBs actually transmitted in the SSB group. The number of SSB groups containing the actually transmitted SSBs may also be indicated to the UE. Different SSB groups share the same pattern of actually transmitted SSBs.

The cell ID (or another system parameter) will then also be used to calculate the starting index of the SSB group actually transmitted.

An embodiment may use n=8 potential SSBs in the SSB group and a total of 64 potential SSBs as an example. This gives an SSB group of p=8. As shown in fig. 3A, 8 bits are used to indicate in a bitmap fashion the SSB locations actually transmitted in the SSB group, e.g., 10100011, meaning that in fact there are 4 SSBs to be transmitted, e.g., the first, third, seventh, and eighth SSBs (including the bits of entry "1").

Another 3 bits are used to indicate the number of SSB groups containing the actually transmitted SSBs. For example, 100 means q=4 SSB groups containing SSBs transmitted in real. Different SSB groups share the same pattern of actually transmitted SSBs.

Then, the UE calculates a start index of the SSB group actually transmitted. For example, the UE uses' N _{cell_ID} mod Y' calculates the starting index of the actually transmitted SSB group. Wherein' N _{cell_ID} ' represents a cell ID, and ' Y ' represents the number of different start indexes of the SSB group actually transmitted. In this embodiment,' N _{cell_ID} ' 581, and in case that 4 SSB groups are actually transmitted, there are ' y=5 ' different start indexes of the actually transmitted SSB groups, i.e., the candidate start indexes of the SSB groups are { SSB group 0, SSB group 1, SSB group 2, SSB group 3, SSB group 4}. The value of 'Y' is calculated using the following formula: y=p-q+1=8-4+1=5. As described above, P represents the total number of SSB groups, and Q represents the number of SSB groups containing the SSB actually transmitted.

Thus 581mod 5=1, meaning that the start index of the SSB group actually transmitted is SSB group 1, i.e., the second SSB group, and the consecutive 4 SSB groups (i.e., SSB group 1, SSB group 2, SSB group 3, SSB group 4) will be actually transmitted.

The indication of the actual transmission SSB position is in this case '10100011100', 11 bits in total. In this case, the least significant 3 bits combined with the cell ID, which are used to indicate the number of SSB groups containing the actually transmitted SSB, may be used to determine which SSB groups contain the actually transmitted SSB. The first 8 bits are used to indicate which SSBs are actually transmitted in each SSB group containing the actually transmitted SSBs. The position of the information bits may vary without limiting the manner described above.

In the above example, the actually transmitted SSB is: { SSB8, SSB10, SSB14, SSB15, SSB16, SSB18, SSB22, SSB23, SSB24, SSB26, SSB30, SSB31, SSB32, SSB34, SSB38, SSB39}.

For determining the value of 'Y' described above (which refers to the number of different starting indexes of the SSB group actually transmitted), the following assumptions have been made: the consecutive SSB groups are occupied by the actually transmitted SSBs. In this case, the value of 'Y' is a function of 'P' and 'Q', i.e., y=p-q+1, where 'P' represents the number of SSB groups and 'Q' represents the number of SSB groups containing the SSB actually transmitted.

The following method may also be used to determine the value of 'Y':

method A: 'Y' is equal to 'P'. In this case, the start index of the SSB Group containing the actually transmitted SSB may also be calculated via formula' N _{cell_ID} mod Y'. When there are not enough consecutive SSB groups, the mapping of the initial SSB groups continues. As shown in fig. 3B, assume N _{cell_ID} =582 and y=p=8, then N _{cell_ID} mod y=552 mod 8=6. I.e., the start SSB group is the seventh SSB group (start index is SSB group 6). Assume that there are 5 SSB groups containing the actually transmitted SSBs. The 5 SSB groups are SSB group 6, SSB group 7, SSB group 0, SSB group 1, SSB group 2.

Method 3:

the number of SSBs actually transmitted + the start index + the interval between two adjacent SSBs. The number of actually transmitted SSBs is used to indicate the actually transmitted SSBs.

The interval may also be transmitted to the UE for indicating the number of SSB resources between two adjacent actually transmitted SSBs. The cell ID (or another system parameter) will then be used to calculate the start index of the actually transmitted SSB.

For example, a total of 64 potential SSBs may be used as an example embodiment. As shown in fig. 4, 6 bits are required to indicate the number of SSBs actually transmitted, for example 001011, meaning that there are 11 SSBs to be actually transmitted.

Another 6 bits are required to indicate Gap (interval) between two consecutive transmission SSBs. For example 000010, it means that 2 SSBs will be skipped between two adjacent actually transmitted SSBs. It is worth noting that the interval here indicates an interval of a plurality of potential SSB Resources (Resources), but not absolute time, although the interval between two adjacent actually transmitted SSBs is two SSBs, the absolute time intervals need not be equal. As shown in fig. 4, the absolute time interval between the first actually transmitted SSB (SSB 1) and the second actually transmitted SSB (SSB 4) is different from the absolute time interval between the second actually transmitted SSB (SSB 4) and the third actually transmitted SSB (SSB 7).

On the receiving side, the UE calculates a start index of the actually transmitted SSB. Using' N _{cell_ID} mod Z' calculates the starting index of the actual transmission SSB set. The value of Z may be predefined in the specification or configured to the UE by signaling. For example, N _{cell_ID} 581, and z=4. 581mod 4=1 means that the start index of the actually transmitted SSB is SSB1, i.e., the second SSB.

The SSB actually transmitted is: { SSB1, SSB4, SSB7, SSB10, SSB13, SSB16, SSB19, SSB22, SSB25, SSB28, SSB3}.

Method 4:

potential SSBs are divided into SSB groups. The actually transmitted SSB location is indicated by the number of SSB groups containing the actually transmitted SSBs and the number of SSBs within each group containing the actually transmitted SSBs.

Wherein the index of the first group containing the actually transmitted SSB depends on the system parameter, or the index of the first SSB within each SSB group containing the actually transmitted SSB depends on the system parameter, or both the index of the first SSB within each SSB group containing the actually transmitted SSB and the index of the first group containing the actually transmitted SSB depend on the system parameter.

The method for determining the index of the first actually transmitted SSB within each SSB group containing the actually transmitted SSB is consistent with method 1, where the index of the first actually transmitted SSB within each SSB group containing the actually transmitted SSB depends on the system parameters. The index of the first SSB group containing the actually transmitted SSBs may then be predefined in the specification or configured to the UE by signaling.

The method for determining the index of the first SSB group containing the actually transmitted SSB is consistent with method 2, where the index of the first SSB group containing the actually transmitted SSB depends on system parameters. The index of the first SSB within the SSB group containing the actually transmitted SSB may then be predefined in the specification or configured to the UE by signaling.

The index for the first actually transmitted SSB within each SSB group containing the actually transmitted SSB and the index for the first SSB group containing the actually transmitted SSB are both dependent on the case of the system parameter, which is a combined method of determining the index for the first SSB group containing the actually transmitted SSB described in method 2 and determining the index for the first actually transmitted SSB within each SSB group containing the actually transmitted SSB described in method 1.

It should be noted in examples 1, 2 and 3 that the cell index is used to implicitly indicate the start index information, or the system may predefine the start index (e.g., default nth SSB is start SSB or similar), or predefine signaling instructions to determine the start index (e.g., 6-bit signaling explicitly indicating which SSB is start SSB, etc.).

Method 5:

the one or more locations of the actually transmitted SSBs may be notified to both the IDLE and CONNECTED UEs by one or more of the following: physical Broadcast Channel (PBCH), remaining Minimum System Information (RMSI), other system information (other SI), UE Level RRC signaling (UE-specific RRC signaling). The correlation indication information may be used to configure SSB-based mobility measurements to the terminal or to perform rate matching at the terminal data reception. For example, since downstream data is not mapped to resources occupied by the SSB actually transmitted, the terminal will perform rate-matching-based data reception around the resources actually occupied by the SSB.

When the network side wishes to indicate to the terminal the location of the actually transmitted SSB information, it can use different schemes for indicating such information through different signaling/channels. The one or more locations of the indicated transmitted SSBs may be the same or different. Embodiment example 4 uses a combination of potential instructions.

In this embodiment, the one or more location information of the actually transmitted SSBs are indicated by RMSI and UE-specific RRC signaling.

The information indicated in RMSI may be used by the IDLE terminal and the CONNECTED terminal. When the number of RMSI information bits is limited, the methods 1 to 3 described in this document can be considered as "compression methods". Because UE-specific RRC signaling can accommodate a large number of bits, the one or more location information of the transmitted SSB can be indicated by the UE-specific RRC signaling in a complete bitmap fashion. The full bitmap is used to indicate that each potential SSB resource corresponds to a 1 bit, respectively, indicating whether an independent potential SSB is actually transmitted. At this point, when there are 64 potential SSBs, 64 bits are required to indicate.

In this embodiment, one of embodiments 1, 2 and 3 may be used in RMSI to indicate 'compressed' instruction information, for example, in the manner of example method 2, which is '10100011100', meaning that SSB8, SSB10, SSB14, SSB15, SSB16, SSB18, SSB22, SSB23, SSB24, SSB26, SSB30, SSB31, SSB32, SSB34, SSB38, SSB39 are actually transmitted. This information can be considered as the set of SSBs actually transmitted in the cell by each transmitting and receiving node (TRP). For example, in a multi-TRP cell scenario, RMSI is used to indicate that SSBs are actually transmitted at the cell level (i.e., SSBs actually transmitted by a cell), and SSBs actually transmitted by each TRP belonging to a cell are a subset of SSBs actually transmitted by the cell. First, all TRPs belonging to the cell indicate the same information in their respective RMSIs, i.e. "10100011100". And then each TRP belonging to the cell will also indicate the SSB information actually transmitted by itself (i.e. the TRP level of the actually transmitted SSB) by UE-specific RRC signaling. The full bitmap of SSBs within the SSB set actually transmitted at the cell level will be used for UE-specific RRC signaling indication.

In this case, the number of bits of UE-specific RRC signaling is equal to or greater than the number of SSBs within the SSB set actually transmitted at the cell level.

For UE-specific RRC signaling, the following form of RRC parameters (i.e., information elements) may be defined. The number of (4, 8, 16, 64) per CHOICE is merely an example:

BitmapOfActuallyTransmittedSSblocks CHOICE{

BitmapOfActuallyTransmittedSSblocks4 BIT STRING(SIZE(4))，

BitmapOfActuallyTransmittedSSblocks8 BIT STRING(SIZE(8))，

BitmapOfActuallyTransmittedSSblocks16 BIT STRING(SIZE(16))，

BitmapOfActuallyTransmittedSSblocks64 BIT STRING(SIZE(64))，}

when the number of SS blocks actually transmitted as indicated by RMSI is 4 or less, the first selection may be used in UE-specific RRC signaling. The second option may be used in UE-specific RRC signaling when the number of SS blocks actually transmitted as indicated by RMSI is greater than 4 but equal to or less than 8. Similarly, the third option may be used in UE-specific RRC signaling, etc., when the number of SS blocks actually transmitted as indicated by RMSI is greater than 8 but equal to or less than 16. This means that the meaning of the bitmap in UE-specific RRC signaling depends directly on the indication in RMSI.

As shown in fig. 5, RMSI indicates that SSBs actually transmitted at 16 cell levels are shown in a grid (a pattern of cross hatching), and SSBs actually transmitted by the cell are not shown. In this case, the number of bits of UE-specific RRC signaling is equal to the number of SSBs actually transmitted by the cell. TRP will select CHOICE 3, i.e. select BIT stream (SIZE (16)) indicating the SSB actually transmitted by TRP level. SSB actually transmitted for TRP level (as shown in black box resource): for TRP1, the 16 bit full bitmap '0111010101010101' also indicates which SSB TRP1 actually transmitted; for TRP2, a 16 bit full bitmap '1110111011101110' also indicates which SSB TRP2 actually transmitted. In this way, the UE-specific RRC signaling indication requires only 16 bits. The method described in this embodiment can significantly reduce signaling overhead compared to a complete bitmap of all 64 potential SSBs.

For the case where the number of SSBs actually transmitted at the cell level indicated by RMSI is not equal to the number given in the CHOICE IE, there are, for example, 12 SSBs actually transmitted at the cell level indicated in RMSI. Because 8<12<16, TRP will also select CHOICE 3, BIT stream (SIZE (16)) to indicate the SSB actually transmitted by TRP level. A portion of the 16 bits (e.g., the first 12 bits) will be used to indicate the location of the SSB actually transmitted by the TRP stage. The remaining bits (e.g., the last 4 bits) will be invalidated.

It should be understood that features of the various embodiments may be used in one embodiment without conflict, as described in this document. Each embodiment is merely an example embodiment in the corresponding disclosed technology.

As described, various embodiments and techniques herein provide time domain positioning information transmission methods and systems. Some embodiments include:

[1] use of a cell ID implicit instruction to start indexing a start index, wherein the start index comprises one of: SSB group SSB start SSB index, SSB start index, SSB group start index. (methods described in method 1, method 2 and method 3)

[2] Various instructions are given to collectively indicate the actual transmission method of the SSB.

Some embodiments may provide two actual indication SSB positioning indication information: first indication information (SSB actually transmitted at cell level) and second indication information (SSB actually transmitted at TRP level), wherein the first indication information is indicated by broadcast information and the broadcast information includes PBCH, RMSI, other SI, and the broadcast information is represented by 'compressed method' (as shown in methods 1, 2, 3).

The second indication information is indicated by UE-specific RRC signaling and the second indication information is indicated in a complete bitmap pattern. The full bitmap is a full bitmap indication within the SSB range of the actual transmission indicated by the first indication information.

Example advantages

The disclosed techniques may be used to implement embodiments that provide time domain positioning information from one network device (e.g., a base station) to another network device (terminal). By this scheme, the collision probability of the actual transmission of the synchronization signal blocks between cells can be reduced, compared to the current method requiring signaling to start the index, so that the interference between cells can be reduced. Thus, the signaling overhead in the UE-level RRC signaling instruction pattern is effectively reduced by combining the various SSB indication patterns.

Fig. 6 is a flow chart illustrating an example method 600 for wireless communication. The method 600 includes: logically grouping transmission resources available for transmitting synchronization signals/physical broadcast channel blocks (SSBs) into a plurality of SSB groups (602); and transmitting (604) information about the location of the actually transmitted SSBs in a message comprising a first field indicating the number of SSB groups and a second field indicating the pattern of the actually transmitted SSBs within each group, wherein the index of the first group containing the actually transmitted SSBs depends on system parameters.

Fig. 7 is a flow chart illustrating an example method 700 for wireless communication. The method 700 includes: receiving (702) information about the location of an actually transmitted synchronization signal/physical channel broadcast block (SSB) in a message comprising a first field indicating the number of SSB groups and a second field indicating a pattern of SSBs within each SSB group containing the actually transmitted SSB, wherein all transmission resources available for transmitting the SSB are logically grouped into a plurality of SSB groups; and determining (704) an index of the first SSB group containing the actually transmitted SSBs using the system parameters.

Some example embodiments of messages used in method 600 or method 700 are described with respect to fig. 3A and 3B.

Fig. 8 is a flow chart illustrating an example method 800 for wireless communication. The method 800 includes: logically grouping transmission resources available for transmitting synchronization signals/physical broadcast channel blocks (SSBs) into a plurality of SSB groups (802); and transmitting (804) information about the location of the actually transmitted SSBs in a message comprising a first field indicating a pattern of SSB groups containing the actually transmitted SSBs and a second field indicating the number of SSBs within each SSB group containing the actually transmitted SSBs, wherein an index of the first SSB within each SSB group containing the actually transmitted SSBs depends on the system parameter.

Fig. 9 is a flow chart illustrating an example method 900 for wireless communication. The method 900 includes: receiving (902) information about a location of an actually transmitted synchronization signal/physical channel broadcast block (SSB) in a message comprising a first field indicating a pattern of SSB groups containing the actually transmitted SSBs and a second field indicating a number of SSBs within each SSB group containing the actually transmitted SSBs, wherein an index of the first SSB within each SSB group containing the actually transmitted SSBs depends on a system parameter; and determining (904) an index of the first SSB within each SSB group containing the actually transmitted SSBs using the system parameters.

Some example embodiments of the message used in method 600 or method 700 are described with respect to fig. 2A-2D.

Fig. 10 is a flow chart illustrating an example method 1000 for wireless communication. The method 1000 includes: allocating (1002) transmission resources available for transmitting synchronization signals/physical broadcast channel blocks (SSBs) to a plurality of SSB transmissions; and transmitting (1004) information about the location of the actually transmitted SSBs in a message comprising a first field indicating the number of actually transmitted SSBs and a second field indicating the interval between two adjacent actually transmitted SSBs, wherein the index of the first actually transmitted SSB depends on the system parameters.

Fig. 11 is a flow chart illustrating an example method 1100 for wireless communication. The method 1100 includes: receiving (1101) information about the location of an actually transmitted synchronization signal/physical broadcast channel block (SSB) in a message comprising a first field indicating the number of actually transmitted SSBs and a second field indicating the interval between two adjacent actually transmitted SSBs, wherein the index of the first actually transmitted SSB depends on a system parameter; and determining (1103) an index of the first actually transmitted SSB using the system parameters.

Some example embodiments of messages used in method 600 or method 700 are described with respect to fig. 4.

In some embodiments, a method of wireless communication may include: transmitting first information about the actually transmitted SSB in a message using the methods recited in any of method 600, method 800, and method 1000; and transmitting second information about the actually transmitted SSB in another message using the full bitmap of the actually transmitted SSB indicated in the first information.

In some embodiments, a method of wireless communication may include: receiving a message as described in any of method 600, method 800, or method 1000; carrying first information about a synchronization signal/physical broadcast channel block (SSB) of an actual transmission; and receiving another message carrying a complete bitmap of the actually transmitted SSB indicated in the first information.

Some example embodiments of messages used in the above method are described with reference to fig. 5.

In some embodiments, the system parameters in the above methods 600-1100 may be a cell-specific unique identifier, such as a cell_id or a media access address (MAC) address or another unique identifier of a base station. In some embodiments, the SSB groups described with respect to methods 600-1100 may all have the same number of SSBs. Alternatively, at least some SSB groups may have different numbers of SSBs.

Fig. 12 is a block diagram of an example of a wireless communication apparatus 1001. The apparatus 1001 includes: a processor 1010, which may be configured to implement one of the techniques described herein, transceiver electronics 1015, which may transmit signals or receive signals using one or more antennas 1020, and one or more memories 1005, which may be used to store instructions and/or data that may be executed by the processor 1010.

Fig. 13 illustrates an example wireless communication network 1150. Network 1100 includes a base station BS1102 and a multi-user device 1106 that can communicate with each other over a transmission medium 1104. The transmission from BS1102 to device 1106 is typically referred to as a downlink transmission or downlink transmission. The transmission from device 1106 to BS1102 is typically referred to as an uplink transmission or uplink transmission. The transmission medium 1104 is typically a wireless (air) medium. BS1102 can also be communicatively coupled with other base stations or other devices in a network via a backhaul or access network connection 1112.

It should be appreciated that a number of techniques are disclosed for indicating the actual use of transmission resources from a set of transmission resources (designated for carrying information from a transmitting device to one or more receiving devices). While SSB is used as an example of such information, the described methods may be used to indicate and carry other information between a base station and one or more user terminals. For example, in some embodiments, a disclosed technique for control information (such as reference signal location) may be used to construct and send whether a bitmap or code division multiplexing is used to transmit the information blocks. For example, the disclosed techniques may be used to indicate actually used transmission resources for control information (including information common at the cell level and information specific to each TRP). The control information may be composed of control information blocks, and the actually transmitted control information blocks from all possible control information block transmissions may be indicated by the transmitting device and received and determined by the receiving device using any of the techniques described with respect to fig. 2A-5. It will also be appreciated that the disclosed techniques may also provide for a reduction in the total number of bits used to transmit the information.

The embodiments described in this document and other embodiments, modules, and functional operations may be implemented in digital electronic circuitry, or in computer software, firmware, or hardware, including the structures disclosed in this document and their structural equivalents, or in combinations of one or more of them. The disclosed embodiments and other embodiments may be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a computer readable medium (for execution by, or for controlling the operation of, data processing apparatus). The computer readable medium can be a machine-readable storage device, a machine-readable storage medium, a storage device, a composition of matter effecting a machine-readable propagated signal, or a combination of one or more of them. The term "data processing apparatus" encompasses all apparatus, devices, and machines for processing data, including by way of example a programmable processor, a computer, or multiple processors or computers. The apparatus may include, in addition to hardware, the code discussed to create an execution environment for a computer program, e.g., code that constitutes processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more of them. The propagated signal is an artificially generated signal, e.g., a machine-generated electrical, optical, or electromagnetic signal, that is generated to encode information for transmission to suitable receiving means.

A computer program (also known as a program, software application, script, or code) can be written in any form of programming language, including compiled or interpreted languages, and it can be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. The computer program does not have to correspond to a file in the file system. A program can be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language file), in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files that store portions of one or more modules, sub-programs, or code). A computer program can be deployed to be executed on one computer or on multiple computers that are located at one site or distributed across multiple sites and interconnected by a communication network.

The processes and logic flows described in this document can be performed by one or more programmable processors executing one or more computer programs to perform functions by operating on input data and generating output. The processes and logic flows can also be performed by, and apparatus can also be implemented as, special purpose logic circuitry, e.g., an FPGA (field programmable gate array) or an ASIC (application-specific integrated circuit).

Processors suitable for the implementation of a computer program include, by way of example, both general and special purpose microprocessors, and any one or more processors of any kind of digital computer. Generally, a processor will receive instructions and data from a read-only memory or a random access memory or both. The essential elements of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. Typically, a computer will also include, or be operatively coupled to receive data from or transfer data to, or both, one or more mass storage devices (e.g., magnetic, magneto-optical disks, or optical disks). However, a computer need not have such devices. Computer readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media and storage devices, including by way of example semiconductor memory devices (e.g., EPROM, EEPROM, and flash memory devices); magnetic disks (e.g., internal hard disks or removable disks); magneto-optical disk; CD ROM and DVD-ROM hard disks. The processor and the memory may be supplemented by, or incorporated in, special purpose logic circuitry.

Although this document contains many specifics, these should not be construed as limitations on the scope of what may be claimed or of what may be claimed, but rather as descriptions of features specific to particular embodiments. Certain features that are described in this document in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Furthermore, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination. Similarly, although operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results.

Only a few examples and embodiments are disclosed. Variations, modifications, and enhancements to the described examples and embodiments, as well as other embodiments, may be made based on the disclosure.

Claims

1. A method of wireless communication, comprising:

transmitting first indication information related to a synchronization signal/physical broadcast channel block (SSB) set actually transmitted at a cell level to a first network device;

and sending second indication information to the first network equipment according to the first indication information so as to indicate the SSB set actually transmitted by the TRP level of the sending and receiving nodes.

2. The method of claim 1, wherein the first indication information is a first bitmap indicating the SSB set actually transmitted by the cell level, and the second indication information is a second bitmap indicating the SSB set actually transmitted by the TRP level.

3. The method of claim 1, wherein the set of SSBs actually transmitted by the TRP level is a subset of the set of SSBs actually transmitted by the cell level.

4. The method of claim 1, wherein the second indication information has a number of bits equal to or greater than a number of SSBs within the set of SSBs actually transmitted at the cell level.

5. The method of claim 1, wherein the second indication information is associated with an information element comprising at least one predetermined value, the at least one predetermined value being related to a length of the second bitmap.

6. The method of claim 5, wherein the length of the second bitmap is determined according to a minimum predetermined value of the at least one predetermined value that is greater than or equal to a number of SSBs within the SSB set actually transmitted at the cell level.

7. The method according to any of claims 1-6, wherein the first indication information is remaining minimum system information, RMSI, and the second indication information is UE-specific radio resource control, RRC, signaling.

8. A method of wireless communication, comprising:

the first network equipment receives first indication information, wherein the first indication information is related to a synchronous signal/physical broadcast channel block SSB actually transmitted at a cell level;

receiving second indication information for indicating the SSB actually transmitted by the TRP level of the transmitting and receiving nodes, wherein the second indication information is transmitted by the second network equipment according to the first indication information.

9. The method of claim 8, wherein the first indication information is a first bitmap indicating SSBs actually transmitted by the cell level, and the second indication information is a second bitmap indicating SSBs actually transmitted by the TRP level.

10. The method of claim 8, wherein the set of SSBs actually transmitted by the TRP level is a subset of the set of SSBs actually transmitted by the cell level.

11. The method of claim 8, wherein the second indication information has a number of bits equal to or greater than a number of SSBs within the set of SSBs actually transmitted at the cell level.

12. The method of claim 8, wherein the second indication information is associated with an information element comprising at least one predetermined value, the at least one predetermined value being related to a length of the second bitmap.

13. The method of claim 12, wherein the length of the second bitmap is determined according to a minimum predetermined value of the at least one predetermined value that is greater than or equal to a number of SSBs within the SSB set actually transmitted at the cell level.

14. The method according to any of claims 8-13, wherein the first indication information is remaining minimum system information, RMSI, and the second indication information is UE-specific radio resource control, RRC, signaling.

15. A network device comprising a processor and a memory, the memory storing a computer program which, when executed by the processor, implements the method of any of claims 1-14.

16. A computer readable medium having stored thereon a computer program which, when executed by a processor, implements the method of any of claims 1-14.