CN109906654A

CN109906654A - Radio resource allocation system and method

Info

Publication number: CN109906654A
Application number: CN201780068003.0A
Authority: CN
Inventors: 罗伊·罗恩; 艾奥安妮丝·西奥凯肯司
Original assignee: Huizhou TCL Mobile Communication Co Ltd
Current assignee: Huizhou TCL Mobile Communication Co Ltd
Priority date: 2016-11-04
Filing date: 2017-10-30
Publication date: 2019-06-18
Anticipated expiration: 2037-10-30
Also published as: WO2018082527A1; CN109906654B; GB2555612B; GB2555612A

Abstract

One kind is wireless device, such as machine type communication device, the method for distributing radio resource, comprising: indicates to send to the wireless device by the distribution for distributing to the radio resource of wireless device at radio node.The bandwidth of the radio node includes multiple resource blocks in frequency domain.Total bandwidth includes multiple resource block collection, and each resource block collection includes the Integer n continuous resource blocks in frequency domain.The distribution instruction includes: the instruction for having distributed resource block in a resource block collection；Instruction of the resource block collection in node bandwidth is distributed.Each collection is limited to 24 or 25 resource blocks.

Description

Wireless resource allocation system and method

Technical Field

The present application relates to radio resource allocation for wireless communication devices.

Background

Long-Term Evolution (LTE) is a wireless communication technology developed by The 3rd generation Partnership Project (3 GPP). LTE supports Machine Type Communications (MTC). LTE release 13 supports MTC devices with channel bandwidths up to 1.4 MHz. MTC devices are allocated contiguous groups of up to six Physical Resource Blocks (PRBs) within a narrow band. The device receives a Resource allocation indicating a Resource Block Assignment (RBA) that includes a narrowband index and 5 bits indicating an intra-narrowband Resource allocation.

It has been proposed to support MTC devices with wider channel bandwidths, for example 5MHz or 20 MHz.

The examples described below are not limited to implementations that solve any or all disadvantages of known systems.

Disclosure of Invention

The application provides a method for allocating wireless resources for a wireless device, comprising: at a wireless node, transmitting an allocation indication of wireless resources allocated to the wireless device, wherein a bandwidth of the wireless node comprises a plurality of resource blocks in the frequency domain, a total bandwidth comprises a plurality of resource block sets, each of the resource block sets comprising an integer number n of consecutive resource blocks in the frequency domain, wherein the allocation indication comprises: an indication that allocated resource blocks are within one of the resource block sets; an indication that the set of allocated resource blocks is within the node bandwidth.

The indication of the allocated resource block set may be an indication of an offset from a reference set and in units of the number of sets.

The indication of the set of allocated resource blocks may be an indication of an offset from the first set and in units of the number of sets.

The maximum size of each set is 24 or 25 resource blocks.

The allocation indication may comprise an allocation type indication, including two allocation types: centralized allocation of consecutive resource blocks in the allocated resource block set; distributed allocation of resource blocks in the set of allocated resource blocks.

The indication of the allocated resource blocks in the set of allocated resource blocks may be a resource allocation type 2 as defined by 3gpp ts 36.213.

The allocation indication may indicate whether frequency hopping is enabled between different sets of resource blocks.

The resource block sets may be the same size.

A size of a set may be variable based on the total bandwidth of the wireless node.

The node bandwidth may be one of 10MHz, 15MHz, and 20MHz, and the number of the resource block sets may be 2, 3, and 4, respectively.

The allocation indication may include: a 1-bit indication of allocation type; a 1-bit indication of whether frequency hopping is enabled between different resource block sets; a multi-bit indication of allocated resource blocks in the allocated set; at least 1 bit indication of the offset from the reference set and in units of number of sets.

The multi-bit indication of the allocated resource block may be a maximum of 7 bits.

The application provides a method for allocating wireless resources for a wireless device, the method comprising: receiving, at a wireless device, an allocation indication of wireless resources allocated to the wireless device, wherein a total bandwidth of a wireless node serving the wireless device comprises a plurality of resource blocks in a frequency domain, the total bandwidth comprises a plurality of resource block sets, each of the resource block sets comprises an integer number n of consecutive resource blocks in the frequency domain, wherein the allocation indication comprises: an indication of allocated resource blocks within a set of resource blocks; an indication that the set of allocated resource blocks is within the node bandwidth.

The allocation may be an allocation of downlink channel resources.

The allocation may be an allocation of uplink channel resources.

The wireless device may be a machine type communication device.

The wireless device may be a machine type communication device having a channel bandwidth of up to 5 MHz.

The application provides a method for allocating wireless resources for a machine type communication wireless device, which is characterized by comprising the following steps: at a wireless node, transmitting an allocation indication of a wireless resource allocated to the wireless device, wherein a bandwidth of the wireless node comprises a plurality of resource blocks in a frequency domain, wherein the allocation indication comprises: an indication of allocated resource blocks; an indication of allocation type, wherein two possible allocation types are included: centralized allocation of consecutive resource blocks; distributed allocation of resource blocks.

The application provides a method for allocating wireless resources for a machine type communication wireless device, the method comprising: receiving, at a wireless device, an allocation indication of a wireless resource allocated to the wireless device, wherein a bandwidth of a wireless node serving the wireless device comprises a plurality of resource blocks in a frequency domain, wherein the allocation indication comprises: an indication of allocated resource blocks; an indication of allocation type, wherein two possible allocation types are included: centralized allocation of consecutive resource blocks; distributed allocation of resource blocks.

The maximum size of the bandwidth may be 24 or 25 resource blocks.

The indication of allocated resource blocks is resource allocation type 2 as defined by 3GPP TS 36.213.

The present application provides a wireless device for performing the described or claimed method. The wireless apparatus may be provided at a wireless node (e.g., a radio base station) or at a wireless device (e.g., a user equipment, UE).

At least one example of the present application provides an efficient way to signal resource allocations to wireless devices (e.g., 5MHz MTC devices) that support a wider channel bandwidth. A small number of bits are needed to indicate the resource block set while still allowing allocation of resource blocks within the allocated resource block set with a better granularity. The index may be used to indicate an offset of the set within the total bandwidth of the serving node.

At least one example of the present application provides a method of hybrid downlink Resource Allocation (RA) for MTC devices supporting channel bandwidths up to 5 MHz. The method combines the concept of resource allocation type 2 and Narrowband (NB) frequency hopping. Advantages include one or more of the following: scheduling flexibility; centralized or distributed allocation of resource blocks; frequency diversity gain compared to other resource allocation techniques; less signaling overhead compared to Rel-13eMTC resource allocation; high backward compatibility with previous versions of the LTE standard. When a UE is scheduled as a 1.4MHz UE, the same scheduling granularity can be maintained as for Rel-13BL/CE UEs. When the UE is scheduled as a 5MHz UE, the same granularity as the Rel-8 legacy UE is maintained.

A Downlink Control Indicator (DCI) signal contains Resource Block Allocation (RBA) bits used to determine allocated frequency/time resources for a particular UE. In at least one example of the present application, for a Rel-14 fetcc UE, the Resource Block Allocation (RBA) bits include RIV bits to allocate up to 25 Resource Blocks (RBs) in a centralized or distributed manner.

The RIV may be based on resource allocation type 2, but is defined as a maximum allocation size of 25 or 24 PRBs.

At least one example of the present application provides a high level of scheduling flexibility, as it can serve as: a method of providing a frequency diversity gain by using a distributed type allocation; a method of allowing Channel dependent scheduling by using centralized type assignment and/or DA offset when Channel State Information (CSI) is available; a method of providing frequency diversity gain during repetition by enabling DA hopping; and combinations of the above.

This scheduling flexibility is beneficial for service performance applicable to MTC devices such as Voice over LTE (VoLTE).

An advantage of examples of the present application is that frequency diversity performance gains can be provided without the use of frequency hopping. With the resource allocation type for eMTC devices as defined in 3GPP Rel-13, frequency diversity can only be achieved by frequency hopping. However, the serving cell sometimes does not enable frequency hopping, and further, since frequency hopping occurs only between subframes, when there is no repetition, a gain of frequency hopping is small. On the other hand, distributed allocation may provide inter-slot frequency hopping within a subframe, so that diversity may also be achieved without repetition.

At least one example of the present application enables the use of frequency hopping within the system bandwidth in DA units. The combination of the two frequency diversity techniques allows an evolved Node B (eNodeB) to utilize the entire cell bandwidth for frequency diversity gain.

At least one example of the present application may allow the same granularity in resource allocation between legacy 1.4MHz UEs and wider bandwidth UEs (e.g., 5MHz UEs).

At least one example of the present application allows for continuous RB allocation for RA type 2 centralized approach. Thus, in general, a wireless node (eNodeB) may provide a high level of scheduling flexibility to allow channel dependent scheduling and performance gains of frequency diversity.

The present application provides a user equipment for performing the described or claimed method.

The functionality described in this application is applicable to, but not limited to, low complexity UEs (bl) or enhanced Coverage (CE) UEs, such as CE mode a devices, with reduced bandwidth. And the functionality described in this application applies to, but is not limited to, Machine Type Communication (MTC).

The functions described herein may be implemented by hardware, software executed by a processing device, or a combination of hardware and software. The processing device may include a computer, processor, state machine, logic array, or any other suitable processing device. The processing device may be a general-purpose processor executing software to perform the required tasks or may be dedicated to processing devices performing the required functions. Another aspect of the application provides machine-readable instructions (software) which, when executed by a processor, are capable of performing any of the methods described above. The machine-readable instructions may be stored on an electronic storage device, hard disk, optical disk, or other machine-readable storage medium. The machine-readable medium may be a non-transitory machine-readable medium. The term "non-transitory machine-readable medium" includes all machine-readable media except transitory propagating signals. The machine-readable instructions may be downloaded to the storage medium over a network connection.

Features of any example, embodiment, and/or any example or embodiment may be combined in any manner and/or combination unless the features are incompatible.

Drawings

Embodiments of the present application are described, by way of example, with reference to the following drawings, in which:

fig. 1 illustrates a wireless communication system with downlink and uplink communications;

fig. 2 shows a radio resource block forming part of a radio resource;

fig. 3 illustrates radio resources on a downlink channel or an uplink channel of a wireless communication system;

fig. 4 shows a set of resource blocks (distribution area) of different cell bandwidths;

FIG. 5 illustrates a method of processing allocation indications at a wireless device;

FIG. 6A shows a data table for two allocation examples;

FIG. 6B shows a Physical Resource Block (PRB) corresponding to the example in FIG. 6A;

fig. 7 shows a table of resource block set (distribution area) numbers for different cell bandwidth ranges;

fig. 8 shows an example table of allocation parameters for different cell bandwidth ranges with type 2 resource allocation and DCI format 1A/1B;

fig. 9 shows an example table of allocation parameters for different cell bandwidth ranges with type 2 resource allocation and DCI format 1C;

fig. 10 shows an example table of uplink allocation parameters for different cell bandwidth ranges with type 2 resource allocation under certain conditions;

fig. 11 shows an example table of uplink allocation parameters for different cell bandwidth ranges with type 0 resource allocation;

fig. 12 shows an example table of uplink allocation parameters for different cell bandwidth ranges for a 20 MHz-capable mode a device;

FIGS. 13 and 14 illustrate the packet error rate performance of the allocation method for two channel types;

fig. 15 schematically illustrates an example apparatus at a wireless node or wireless device.

Detailed Description

Embodiments of the present application are described below by way of example only. These examples represent the best modes of carrying out the application and which the applicant currently knows, but they are not the only modes of realisation. In the description, the functions of the embodiments and the sequence of steps for constructing and operating the examples will be set forth. However, the same or equivalent functions and operational flows may be accomplished by different examples.

Within the scope of the present application, it is expressly noted that the various aspects, embodiments, examples and alternatives set forth in the above paragraphs, in the claims and/or in the following description and drawings, in particular the individual features thereof, may be independent or may be combined in any way. That is, features of all embodiments and/or any embodiment may be combined in any manner, unless such features are incompatible.

Fig. 1 schematically illustrates an example of a wireless communication system having a wireless node 10 (e.g., a wireless base station) and a wireless device 20. A wireless device may also be referred to as a User Equipment (UE) or terminal. Wireless communication includes Downlink (DL) transmission from a base station to a UE and Uplink (UL) transmission from the UE to the base station.

Fig. 2 and 3 show examples of radio resources on a radio channel. The downlink channel will be described below, although the corresponding rules apply equally to the uplink channel. This example describes LTE that employs an Orthogonal Frequency Division Multiplexing (OFDM) modulation scheme. There are multiple frequency subcarriers in the frequency domain and multiple OFDM symbols in the time domain. The OFDM symbols are transmitted via a subset of the subcarriers. The resources are divided into Resource elements 31, and a Physical Resource Block (PRB) 30 includes a Resource element Block. Fig. 2 shows a single PRB 30. This corresponds to one subframe in the time domain. The duration of one subframe is 1 ms. A subframe has two slots. A single PRB 30 occupies 180kHz in the frequency domain. Other sizes of PRBs are also possible. Fig. 3 shows resources of a wireless node such as the wireless base station 20. The wireless node has a total bandwidth, referred to as a cell bandwidth 35. The resources comprise a plurality of PRBs 30 of the type shown in fig. 2. The cell bandwidth 35 hasAnd each resource block. The total cell bandwidth is divided into a plurality of PRB sets. In this application, a resource block set is referred to asDistribution Area (DA), although other suitable names may be used. Each resource block set/DA 40 has the same size for a given cell bandwidth 35. In this example, there are two resource block sets/DA's 40: DA0 and DA 1. Each resource block set/DA 40 is a region of the cell bandwidth within which there is a virtual resource block distribution. The number of resource block sets/DA's 40 may be selected according to the total number of PRBs in the cell bandwidth. For a given cell bandwidthThe number of DA can be set byTo obtain the result that, among them,that is, the number of resource blocks in the resource block set/DA is the cell bandwidth (i.e., the cell bandwidth)) And 25. Therefore, if the cell bandwidth is largeThe size of the resource block set/DA is equal to the bandwidth of the cell; if cell bandwidthResource blocks, each resource block set/DA equals 25 resource blocks. A resource block set/DA size of 25 PRBs is compatible with different cell bandwidth ranges. The number of PRBs in a cell bandwidth of 10MHz is 50(═ 2 resource block sets/DA); the number of PRBs in a cell bandwidth of 15MHz is 75(═ 3 resource block sets/DA); the number of PRBs in a cell bandwidth of 20MHz is 100(═ 4 resource block sets/DA). Fig. 4 shows the cell bandwidth range and the number of DAs. In the example shown in FIG. 4, smaller cell bandwidths, such as 1.4MHz, 3MHz, and 5MHz, have PRBs with a single resource block set/DA, while larger cell bandwidths, such as 10MHz, 15MHz, and 20MHz, have multiple resource block sets ^DA。

There are two types of resource block allocations related to resource allocation type 2: centralized and distributed. The localized allocation allocates consecutive resource blocks in a resource block set/DA. That is, the allocated resource blocks are located together into one group. Distributed allocation distributes resource blocks within a resource block set/DA in the frequency domain. Distributed allocation allocates a different PRB in each of a pair of 0.5ms slots. That is, the resource blocks allocated to the UE can be interleaved with other resource blocks not allocated to the UE.

Fig. 5 illustrates a method of processing allocation indications at a wireless device. Fig. 6A, 6B show examples of each allocation type. In the example of fig. 6B, the wireless node has a 10MHz cell bandwidth of 50 PRBs. The cell bandwidth is divided into two resource block sets/DA: a first resource block set/DA of 25 PRBs (i.e., DA0) and a second resource block set/DA of 25 PRBs (i.e., DA 1). Example #1 shows a centralized allocation and example #2 shows a distributed allocation.

Referring to fig. 5, a UE receives a message indicating resource allocation (step 101). The message includes a Resource Indication Value (RIV). The UE determines the index of the virtual RB using the RIV (step 102). Depending on whether centralized or distributed allocation is used, the method proceeds in one of two ways. A flag in the allocation message received at the UE may indicate which allocation type is being used. For localized allocation, the index of the virtual RB is directly mapped to the index of the PRB, i.e., both are the same. In example #1 in fig. 6A and 6B, the UE receives an allocation message with RIV-79. The UE determines that the virtual resource block is marked by the index 4,5, 6, 7. These correspond to PRB {4,5, 6, 7} in slot 0 and PRB {4,5, 6, 7} in slot 1. In this example, the UE is allocated resources in DA ═ 0. If the UE is allocated resources in DA1, the UE applies an offset to the indices to determine the index of the PRB in DA 1.

Referring to fig. 5, for distributed allocation, the UE maps an index of a virtual RB to an index of a PRB. The mapping may vary between time slots. In example #2 of fig. 6A, 6B, the UE also receives an assignment message with RIV-79. The UE determines that the virtual resource block is marked by the index 4,5, 6, 7. The UE maps these indices of the virtual RB to the PRB. The virtual RB {4,5, 6, 7} corresponds to {7, 13, 19, 2} in slot 0 and {19, 1, 7, 14} in slot 1. It can be seen that although the virtual RBs {4,5, 6, 7} are contiguous, the UE maps the virtual RBs to scattered locations in the DA. In this example, the allocation is in DA 1. Therefore, the UE applies an offset (25, i.e., the size of one DA) to the index of the PRB determined above to obtain DA1, an index {32, 38, 44, 27} in slot 0, and DA1, an index {44, 26, 32, 39} in slot 1. Due to the distribution within the resource block set/DA, and the different allocations in different time slots, the distributed allocation may bring frequency diversity advantages.

As described below, resource block sets/DAs may hop between. This may introduce additional frequency diversity.

3GPP TS 36.211 defines virtual resource blocks of a localized type at section 6.2.3.1 and virtual resource blocks of a distributed type at section 6.2.3.2. This existing scheme is used to allocate over the entire cell bandwidth. With some modifications, this existing solution can be reused. One modification is that the resource allocation (centralized or distributed) is limited to a set of resource blocks/DA, rather than the entire cell bandwidth. Thus, the resource block distribution mechanism may span 25 RBs instead of a frequency bandBy doing so, it is guaranteed that the distribution mechanism will not span more than 25 resource blocks, and the UE will be able to receive the allocation.

Therefore, whenBy using in 3GPP TS 36.211, section 6.2.3.2Replacement ofThe FeMTC UE can utilize a hybrid RA type 2 resource allocation method. When cell bandwidth is wide(i.e., cell bandwidth ≦ 25 resource blocks), the RA type 2 method may be used as described in the existing LTE standard, since the receiver should be able to be configured to receive all resource blocksAnd each resource block.

For theFor RIV, only the need existsAnd (4) a bit.

For theThe DA spans the same frequency band as the cell bandwidth.

For distributed type allocation of RA type 2, sinceAccording to section 6.2.3.2 of 3gpp ts 36.211, no DCI bit is needed to indicate the gap value N_gap,1Or_Ngap,2And N is_gap,1Will always be used.

Deviation of distribution area

When in useAt this time, as shown in fig. 4, the entire cell bandwidth may be accessed for RA type 2 allocation, i.e., the DA may span the entire bandwidth and there is no room for the offset DA. Frequency diversity gain can be obtained by usingDistributed type allocation rather than narrowband hopping.

When in useBoth DA offset and DA hopping are not applicable. In contrast, RA type 2 distributed resource allocation may be used for frequency diversity performance gain.

When in useWhen the DA cannot span more than 25 RBs, it cannot access some cell bandwidth parts when using RA type 2. This is undesirable because the non-DA portion of the cell bandwidth may provide additional frequency diversity or allow for further scheduling multiplexing (FDM) of the UE. In addition, there may be cases where the DA is placed in a fading portion of the bandwidth, resulting in a degradation of the received signal quality. The eNodeB should be able to schedule the DA of the UE to another preferred portion of the cell bandwidth, if needed. This may occur when the eNodeB is aware of the channel quality of the resource block or group of resource blocks (e.g., through CQI reporting). For this reason, in order to be able to exploit the entire available cell bandwidth, the eNodeB may use some extra bits to indicate the offset value of the DA (starting from RB # 0).

Number of bits required to signal DA offsetMay depend on the cell bandwidthAnd the granularity of the offset(in RB) and is given by:

distributed area hopping

Jumps between different DAs are possible. This is called band hopping or DA hopping. The 3GPP standard defines narrowband hopping. This allows the UE to hop between narrow bands within the cell bandwidth. When band hopping is enabled, the UE may use the DA offset index to derive the starting position of the DA and follow a release 13-like hopping pattern signaled by higher layers to hop the DA during the repetition. The UE hops between the DAs. The UE may occupy a contiguous set of PRBs (localized allocation) or a distributed number of PRBs (distributed allocation), and then hop to a different DA within the cell bandwidth and occupy the PRBs within the new DA. The jumps between the DA's are shown in FIG. 4.

The number of DA offsets or jump positions (including no jump case) depends on the cell bandwidth given by the table shown in fig. 7And DA offset granularity

Supported allocation patterns

The following scheduling options are possible:

centralized hybrid RA type 2 without DA hopping.

This option may be used when the eNodeB has sub-band CQI information that may be used by allocating the best contiguous physical RBs to the UE. All RBs can be accessed by a combination of centralized allocation and DA offset within the DA. This option may not be used for repetition when the channel is unstable (stationary) or near stable, as the quality of the selected RB may degrade during repetition.

Centralized hybrid RA type 2 with DA hopping.

This option can be used when the eNodeB is using repetition and wants to use a simple allocation mechanism and wants to exploit frequency diversity. This option avoids the extra scheduling complexity of distributed RA type 2, but it allows a certain level of frequency diversity gain by enabling DA hopping.

Distributed hybrid RA type 2 without DA hopping.

This option may be used in the following cases:

the eNodeB wants to perform simplified allocation in a wider band level (25 RBs) than in the RB level. Therefore, it selects the best offset to direct the DA into the best quality area. In this region, performance can be further improved by a distribution mechanism.

The eNodeB has no (reliable) channel quality information. The offset is used for scheduling multiplexing purposes for additional UEs.

This option can be used with repetition when the channel is generally stable. This option should not be used for repetition when the channel is unstable or near stable, since the quality of the selected offset may not always be the best throughout the repetition.

Distributed hybrid RA type 2 with DA hopping.

This option may be used when the eNodeB has no (reliable) channel quality information or wishes not to perform any frequency dependent scheduling. This option thus enables two of the available frequency diversity techniques, distributed types and frequency hopping. It can be used for repetition (repetition), especially for non-stationary channels.

LTE specification update

New DCI

One possible implementation of a new Downlink Control Information (DCI) format is a hybrid DCI between DCI format 6-1A and DCI format 1B (RA type 2 part). The proposed Resource Block Allocation (RBA) bitstream includes:

a bit indicating an RA type 2 centralized or distributed type of RIV, wherein,is the maximum RIV bit.

A bit for enabling/disabling DA hopping, only whenIt is applicable to the treatment of chronic hepatitis B.

A bit for indicating DA offset only ifIt is applicable to the treatment of chronic hepatitis B. The number of DA offset bits depends on the cell bandwidth and is selected to beThe offset granularity of (a). This offset granularity is a suitable granularity because it keeps the signaling overhead low and because it is a common factor for cell bandwidths of 25, 50, 75 and 100 RBs.

Therefore, the temperature of the molten metal is controlled,

fig. 8 summarizes the resulting number of bits for each field.

One possible implementation of the new DCI format for a FeMTC CE mode a UE is similar to DCI format 6-1A with the following changes:

in section 5.3.3.1.12 of 3GPP TS 36.212, a new DCI format similar to DCI format 6-1A is added. For the resource allocation portion of the DCI, instead of the following:

a frequency hopping flag, as defined in section 6.4.1 of 3GPP TS 36.211, 1 bit,

wherein a value of 0 indicates no frequency hopping enabled and a value of 1 indicates frequency hopping enabled;

-resource block allocation as defined in 3GPP TS36.213 —A bit for a Physical Downlink Shared Channel (PDSCH).

As defined in 3GPP TS 36.211, section 6.2.7,the most significant bits (mostsignifican Bit, MSB) provide the narrowband index;

-5 bits provide resource allocation using DL resource allocation type 2 within the indicated narrowband.

Centralized/distributed VRB allocation flag-1 bit, as defined in 7.1.6.3 of 3GPP TS 36.213;

-resource block allocation for localized and distributed VRBs —A bit

If release 14CE mode AUE:

if is

-One bit providing resource allocation

If is

-a hopping flag, as defined in section 6.4.1 of 3GPP TS36.213, of-1 bit, where a value of 0 indicates that hopping is not enabled and a value of 1 indicates that hopping is enabled;

-one bit providing resource allocation

-The MSB bits provide the DA offset index.

9 bits provide a resource allocation value (RIV) for centralized or distributed VRBs as defined in 3GPP TS36.213 section 7.1.6.3;

if isThe Least Significant Bit (LSB) is not used

Else

-for centralized VRBs:

one bit providing resource allocation

-for distributed VRBs:

for

-One bit providing resource allocation

For

1 bit, MSB indicates a gap value, where a value of 0 indicates N_gap＝N_gap,1The value 1 indicates N_gap＝N_gap,2

-One bit provides resource allocation.

Note that the DCI requirements set forth aboveOne RBA bit, similar to release 8DCI format 1A and DCI format 1B. Thus, a UE capable of receiving a cell bandwidth of up to 20MHz may compile RBA bits similar to DCI format 1A/1B. This means that the proposed DCI services 5 MHz-capable UEs and up to 20 MHz-capable UEs.

Allocation area definition

This definition follows similar principles to the definition of narrow bands defined in section 6.2.7 of [36.211 ]. The main difference is that the narrow band has a fixed bandwidth of 6 RBs. The DA may span a bandwidth of 6 to 25 RBs. Therefore, we propose the following definitions:

the distribution area is defined as n consecutive resource blocks in the frequency domain, whereinThe total number of downlink distribution areas in the configured downlink transmission bandwidth in a cell is given by:

increase by physical resource block numberIn the order of (1), the distribution areas are numbered as-1, wherein the area n is distributed_DAConsists of physical resource block indexes:

n·n_DA+i

wherein,

resource allocation index

When decoding DCI, the UE may derive the following resource block allocation information:

index of allocated physical resource blocks within DA

DA offset index

The final index of the allocated physical resource can be derived by:

n_PRB＝i_DA+n·i_DA,offset

optional resource allocation method

This section provides additional methods to further reduce the number of DCI bits required by the proposed resource allocation method. If any of these alternatives is selected, the LTE specification updates presented later need to be adjusted accordingly.

Hybrid resource allocation using DCI Format 1C RIV

DCI format 1C uses a coarser but similar localized/distributed resource allocation type than DCI formats 1A and 1B, and therefore, it requires fewer bits to indicate the RIV value, as shown in fig. 9. Note that fewer total RBA bits are obtained than the corresponding total RBA bits in fig. 8.

Hybrid resource allocation by excluding distributed allocation

This option also exists to limit the dispensing process to be atOnly centralized type allocation is used. This is because frequency diversity can be obtained by the DA hopping mechanism rather than the distributed type allocation. By doing so, as shown in fig. 9, the localized/distributed indicator flag in the DCI message is not required, and whenThe total resource allocation-related part of the DCI length is reduced by one bit.

UL resource allocation for FeMTC CE mode A receiver

The proposal of the uplink resource allocation method for CE mode a is similar to the corresponding downlink method presented in the downlink case.

Note that downlink resource allocation type 2 is very similar to uplink resource allocation type 0. The difference is that for the uplink, the distributed type allocation is replaced by uplink frequency hopping. Thus, the downlink localized/distributed flag is replaced by the uplink hopping flag. Otherwise, the RBA length is the same between the two resource allocation methods.

Thus, the discussion of downlink resource allocation is also applicable to the uplink.

By using in the "distribution area definition" section aboveReplacement ofTo derive the uplink "distribution area" (DA) and its attributes.

The same can be said for the uplink resource allocation bit number shown in fig. 11. Note that when usedReplacement ofAnd the localized/distributed flag is replaced with a frequency hopping flag, fig. 11 is the same as fig. 8.

When in useUplink frequency hopping may be used. For frequency diversity performance gain, this may be enabled by uplink resource allocation type 0.

When in useUplink resource allocation type 0 may be combined with the DA offset in the same manner as downlink resource allocation type 2 and DA offset combination. The uplink DA offset granularity may also be set to 25 RBs. The DA offset may be reused as the starting DA offset. The jump attribute is configured by higher layers.

For uplink hopping using DA, by using in section 5.3.4 of 3GPP TS 36.211Replacement ofResource block allocation may be implemented.

For uplink hopping using DA, the second N is not needed_{UL_hop}Bits, since the uplink allocation cannot span more than 25Resource blocks, see table 8.4-1 of 3GPP TS 36.213.

The uplink resource allocation method may be enabled by a new uplink DCI format. The DCI is the same for 5 MHz-capable mtc mode a devices and 20 MHz-capable mtc mode a devices. When a5 MHz-competent FeMTC mode a device receives the DCI, the resource block-related bits may be compiled according to fig. 11. When a5 MHz-capable FeMTC mode a device receives the DCI, it may reuse the legacy resource uplink allocation type 0 to extract its allocated RBs. When a UE with a 20MHz channel bandwidth receives the DCI, the resource block-related bits may be compiled according to fig. 12. Fig. 12 provides resource allocation bits of a legacy DCI format 0 using an uplink resource allocation type 0. Thus, a 20 MHz-competent FeMTC UE can reuse the legacy resource uplink allocation type 0 to extract its allocated RBs. Note that there is a high level of alignment of the total number of resource allocation bits between fig. 11 and 12. When in useAnd the DCI is received by a5 MHz-capable mtc mode a device, the LSB of the RIV may be discarded.

Fig. 13 and 14 compare Packet Error Rate (PER) performance between the following three resource allocation methods:

1. centralized without DA hopping:

allocation of 12 consecutive RBs indexed from RB #0 to RB #11 for all subframes.

2. Centralized with DA hopping:

allocation of 12 consecutive RBs indexed from RB #0 to RB #11 for even subframes and allocation of 12 consecutive RBs indexed from RB #11 to RB #22 for odd subframes (band hopping).

3. Distributed resource allocation type 2 (legacy):

allocation of 12 consecutive virtual RBs using the distributed type resource allocation type 2.

The simulation parameters are shown in the following table:

parameter(s)	Value of	Parameter(s)	Value of
				Duplexing and combining	FDD	MCS	4(QPSK 1/3)
Cyclic prefix	Standard of merit	HARQ	Activation of
				Transmission mode	TM1(1x1)	Channel estimation	Ideal for
Cell bandwidth	5MHz	Repetition of	1
				Allocated RB	12	Channel type	EPA 5，EVA 5

Fig. 13 shows the packet error rate performance of the EVA5 channel. Fig. 14 shows the packet error rate performance of the EPA5 channel. Fig. 13 and 14 show that there is only a small performance gain between the localized allocation of 12 PRBs with hopping compared to the localized allocation of 12 PRBs without hopping. In contrast, distributed allocation provides better performance gains.

Fig. 15 illustrates an apparatus at a wireless node (e.g., base station) and/or UE, which may be embodied as any form of computing and/or electronic device in which the above-described system and method embodiments may be implemented. The processing apparatus 300 includes one or more processors 301, which may be microprocessors, controllers, or any other suitable type of processor for executing instructions to control device operations. The processor 301 is connected to the other components of the device via one or more buses 306. Processor-executable instructions 303 may be provided using any computer-readable medium, such as memory 302. The processor-executable instructions 303 may include instructions for implementing the functionality of the described methods. The memory 302 may be of any suitable type, such as read-only memory (ROM), Random Access Memory (RAM), and any type of storage device, such as magnetic or optical storage. Data 304 used by the processor may be stored in the memory 302 or in additional memory. Data 304 includes the timing data described. Processing device 300 includes a wireless transceiver 308.

The above embodiments are provided by way of example only. The disclosure of the present application is not limited to the particular combinations of steps illustrated in the drawings and described herein, but includes any suitable subsets or combinations of steps performed in any suitable order. Portions of the method may be performed in parallel.

The term "user equipment" (UE) is used herein to refer to any device with processing and telecommunications capabilities such that it may perform methods and functions in accordance with examples of the present application. Those skilled in the art will recognize that such processing and communication capabilities may be integrated into many different devices, and thus the term "user equipment" includes mobile phones, personal digital assistants, PCs and many other devices.

It will be apparent to those skilled in the art that any of the ranges or device values given herein may be extended or altered without losing the effect sought.

The person skilled in the art can adapt the examples to any telecommunications network, e.g. 2G, 3G, 4G, 5G or any other telecommunications standard, without losing the effect sought.

It should be appreciated that the benefits and advantages described above may relate to one example, or may relate to several examples. The embodiments are not limited to those that solve any or all of the problems or those that have any or all of the benefits and advantages described.

Any reference to "an" item refers to one or more of those items. The term "comprising" is used herein to mean including the identified method steps or elements, but that such steps or elements do not include an exclusive list, and that a method or apparatus may contain additional steps or elements.

The steps of the methods described herein may be performed in any suitable order, or simultaneously where appropriate. In addition, individual blocks may be deleted from any of the methods without departing from the spirit and scope of the subject matter described herein. Aspects of any of the examples described above may be combined with aspects of any of the other examples described to form further examples without detracting from the effects sought.

It should be understood that the above description of the preferred embodiments is given by way of example only and that various modifications may be made by those skilled in the art. Although various examples have been described above with a certain degree of particularity, or with reference to one or more individual examples, those skilled in the art could make numerous alterations to the disclosed examples without departing from the scope of this application.

Claims

1. A method for allocating radio resources for a wireless device, the method comprising: at the wireless node, a wireless node is provided,

transmitting an allocation indication of radio resources allocated to a wireless device to the wireless device, wherein a bandwidth of the wireless node comprises a plurality of resource blocks in the frequency domain, a total bandwidth comprises a plurality of resource block sets, each of the resource block sets comprising an integer number n of consecutive resource blocks in the frequency domain, wherein the allocation indication comprises:

an indication that allocated resource blocks are within one of the resource block sets;

an indication that the set of allocated resource blocks is within the node bandwidth.

2. The method of claim 1, wherein the indication of the set of allocated resource blocks is an indication of an offset from a reference set in units of a number of sets.

3. The method according to claim 1 or 2, wherein the indication of the set of allocated resource blocks is an indication of an offset from the first set in units of the number of sets.

4. A method according to any one of claims 1 to 3, characterized in that the maximum size of each set is 24 or 25 resource blocks.

5. The method according to any of claims 1 to 4, wherein the allocation indication comprises an indication of allocation type, comprising two allocation types:

centralized allocation of consecutive resource blocks in the allocated resource block set;

distributed allocation of resource blocks in the set of allocated resource blocks.

6. The method according to any of claims 1 to 5, wherein the indication of allocated resource blocks in the set of allocated resource blocks is a resource allocation type 2 as defined by 3GPP TS 36.213.

7. The method according to any of claims 1 to 6, wherein the allocation indication indicates whether frequency hopping is enabled between different sets of resource blocks.

8. The method according to any of claims 1 to 7, wherein the resource block sets are of the same size.

9. The method of any of claims 1-8, wherein a size of a set is variable based on the total bandwidth of the wireless node.

10. The method according to any of claims 1 to 9, wherein the node bandwidth is one of 10MHz, 15MHz, and 20MHz, and the number of resource block sets is 2, 3, and 4, respectively.

11. The method according to any of claims 1 to 10, wherein the allocation indication comprises:

a 1-bit indication of allocation type;

a 1-bit indication of whether frequency hopping is enabled between different resource block sets;

a multi-bit indication of allocated resource blocks in the allocated set;

at least 1 bit indication of the offset from the reference set and in units of number of sets.

12. The method of claim 11, wherein the multi-bit indication of allocated resource blocks is a maximum of 7 bits.

13. A method for allocating radio resources for a wireless device, the method comprising: at the location of the wireless device,

receiving an allocation indication of a wireless resource allocated to the wireless device, wherein a total bandwidth of a wireless node serving the wireless device comprises a plurality of resource blocks in a frequency domain, the total bandwidth comprises a plurality of resource block sets, each of the resource block sets comprises an integer number n of consecutive resource blocks in the frequency domain, wherein the allocation indication comprises:

an indication of allocated resource blocks within a set of resource blocks;

14. The method according to any of the preceding claims, wherein said allocation is an allocation of downlink channel resources.

15. The method according to any of the preceding claims, wherein said allocation is an allocation of uplink channel resources.

16. The method of any preceding claim, wherein the wireless device is a machine type communication device.

17. The method of any preceding claim, wherein the wireless device is a machine type communication device having a channel bandwidth of up to 5 MHz.

18. A method for allocating radio resources for a machine type communication wireless device, the method comprising: at the wireless node, a wireless node is provided,

transmitting an allocation indication of radio resources allocated to the wireless device, wherein a bandwidth of the wireless node comprises a plurality of resource blocks in a frequency domain, wherein the allocation indication comprises:

an indication of allocated resource blocks;

an indication of allocation type, wherein two possible allocation types are included:

centralized allocation of consecutive resource blocks;

distributed allocation of resource blocks.

19. A method for allocating radio resources for a machine type communication wireless device, the method comprising: at the location of the wireless device,

receiving an allocation indication of a radio resource allocated to the wireless device, wherein a bandwidth of a wireless node serving the wireless device comprises a plurality of resource blocks in a frequency domain, wherein the allocation indication comprises:

an indication of allocated resource blocks;

centralized allocation of consecutive resource blocks;

distributed allocation of resource blocks.

20. The method of claim 18 or 19, wherein the maximum size of the bandwidth is 24 or 25 resource blocks.

21. A method according to any of claims 18 to 20, wherein the indication of allocated resource blocks is resource allocation type 2 as defined by 3GPP TS 36.213.

22. A wireless apparatus, characterized in that the apparatus is configured to perform the method of any of the preceding claims.

23. A computer program product comprising a machine-readable medium carrying instructions, wherein the instructions, when executed by a processor, cause the processor to carry out the method of any one of claims 1-21.