CN109906654B

CN109906654B - Wireless resource allocation system and method

Info

Publication number: CN109906654B
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: 2024-03-08
Anticipated expiration: 2037-10-30
Also published as: CN109906654A; GB2555612B; GB2555612A; WO2018082527A1

Abstract

A method of allocating radio resources for a wireless device, such as a machine type communication device, comprising: an allocation indication of radio resources allocated to a wireless device is transmitted to the wireless device at a wireless node. The bandwidth of the wireless node includes a plurality of resource blocks in the frequency domain. The total bandwidth comprises a plurality of resource block sets, each of said resource block sets comprising an integer number n of consecutive resource blocks in the frequency domain. The allocation indication comprises: an indication of allocated resource blocks within one of the sets of resource blocks; an indication that the set of allocated resource blocks is within the node bandwidth. Each set 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 third generation partnership project (The 3rd Generation Partnership Project,3GPP). LTE supports machine type communication (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 (Physical Resource Block, PRBs) within a narrowband. The device receives a resource allocation indicating a resource block assignment (Resource Block Assignment, RBA) containing a narrowband index and 5 bits indicating a resource allocation within the narrowband.

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

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

Disclosure of Invention

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

The indication of the set of allocated resource blocks 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.

Each set has a maximum size of 24 or 25 resource blocks.

The allocation indication may include an allocation type indication comprising two allocation types: centralized allocation of consecutive resource blocks in the set of allocated resource blocks; the 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.

The size of the 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 sets of resource blocks; a multi-bit indication of allocated resource blocks in the allocated set; at least 1 bit of offset from the reference set and in number of sets.

The multi-bit indication of the allocated resource blocks may be 7 bits at maximum.

The application provides a method of allocating radio resources for a wireless device, the method comprising: at a wireless device, receiving 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 comprising 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 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 up to 5 MHz.

The application provides a method for allocating radio resources for a machine type communication wireless device, the method 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 a frequency domain, wherein the allocation indication comprises: an indication of allocated resource blocks; an indication of the allocation type, including two possible allocation types: centralized allocation of consecutive resource blocks; distributed allocation of resource blocks.

The present application provides a method of allocating radio resources for a machine type communication wireless device, the method comprising: at a wireless device, receiving an allocation indication of wireless resources 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 the allocation type, including two possible allocation types: 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 in 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 wireless 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 allocation to wireless devices supporting wider channel bandwidths (e.g., 5MHz MTC devices). A small number of bits are required 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 (resource block allocation, RA) for MTC devices supporting channel bandwidths of up to 5 MHz. The method combines the concepts of resource allocation type 2 and Narrowband (NB) 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 the UE is scheduled as a 1.4MHz UE, the same scheduling granularity as the Rel-13BL/CE UE may be maintained. When the UE is scheduled as a 5MHz UE, the same granularity as Rel-8 legacy UEs is maintained.

The downlink control indicator (Downlink Control Indicator, DCI) signal contains resource block allocation (resource block allocation, RBA) bits that are used to determine the allocated frequency/time resources for a particular UE. In at least one example of the present application, for a Rel-14FeMTC 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 because it can be used as: a method of providing frequency diversity gain by using distributed type allocation; a method of allowing channel dependent scheduling by using a centralized type allocation and/or a DA offset when channel state information (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 the examples of the present application is that frequency diversity performance gains may be provided without the use of frequency hopping. With the type of resource allocation as defined in 3GPP Rel-13 for eMTC devices, frequency diversity can only be achieved by frequency hopping. However, the serving cell sometimes does not enable frequency hopping, and furthermore, since frequency hopping occurs only between subframes, the gain of frequency hopping is small when there is no repetition. Distributed allocation, on the other hand, 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 methods. Thus, in general, a wireless node (eNodeB) may provide a high level of scheduling flexibility to allow for channel dependent scheduling and performance gains for 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) with reduced bandwidth or UEs in enhanced coverage (enhanced coverage, CE), e.g., CE mode a devices. And the functionality described in this application is applicable to, but 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 comprise a computer, processor, state machine, logic array, or any other suitable processing device. The processing means may be a general purpose processor that executes software to perform the required tasks, or may be dedicated to the processing means performing the required functions. Another aspect of the present 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 such features are incompatible.

Drawings

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

fig. 1 illustrates a wireless communication system having 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 areas) for different cell bandwidth ranges;

fig. 5 illustrates a method of processing an allocation indication at a wireless device;

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

fig. 6B shows Physical Resource Blocks (PRBs) corresponding to the example in fig. 6A;

fig. 7 shows a table of the number of resource block sets (distribution areas) for different cell bandwidth ranges;

FIG. 8 illustrates 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 20MHz capable mode a device;

figures 13 and 14 show the packet error rate performance of the allocation method for both 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 mode presently known to the applicant for carrying out the application, but are not the only modes of carrying out. The function of the embodiments and the sequence of steps of the construction and operation examples will be set forth in the description. However, the same or equivalent functions and operational flows may be accomplished by different examples.

Within the scope of the present application it is explicitly pointed out that the individual features of the aspects, embodiments, examples and alternatives set out in the preceding paragraphs, the claims and/or in the following description and drawings, in particular, can be combined either individually or in any desired manner. That is, features of all and/or any of the embodiments 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. The wireless communication includes Downlink (DL) transmission from the base station to the 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 employing an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexed, 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 the physical resource blocks (Physical Resource Block, PRBs) 30 comprise resource element blocks. Fig. 2 shows a single PRB 30. This corresponds to one subframe in the time domain. The duration of one subframe is 1ms. 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 the resources of a wireless node, such as wireless base station 20. The wireless node has a total bandwidth, referred to as cell bandwidth 35. The resources comprise a plurality of PRBs 30 of the type shown in fig. 2. Cell bandwidth 35 hasAnd resource blocks. The total cell bandwidth is divided into a plurality of PRB sets. The set of resource blocks is referred to herein as a distribution area (Distribution 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 40: DA0 and DA1. Each resource block set/DA 40 is an area of cell bandwidth within which there is a virtual resource block distribution. The number of resource block sets/DA 40 may be selected based on the total number of PRBs in the cell bandwidth. For a given cell bandwidth +.>The number of DA can be defined by +.>Deriving, wherein->That is, the number of resource blocks in the resource block set/DA is the cell bandwidth (i.e. +.>) And 25. Thus, if the cell bandwidthThe size of each resource block is equal to the cell bandwidth; if the cell bandwidth +.>Each set of resource blocks/DA is equal to 25 resource blocks. The resource block set/DA size of 25 PRBs is compatible with different cell bandwidth ranges. The number of PRBs in the cell bandwidth of 10MHz is 50 (=2 resource block sets/DA); the number of PRBs in the cell bandwidth of 15MHz is 75 (=3 resource block sets/DA); the number of PRBs in the cell bandwidth of 20MHz is 100 (=4 resource block sets/DA). Fig. 4 shows the cell bandwidth range and the number of DA's. In the example shown in fig. 4, smaller cell bandwidths, such as 1.4MHz, 3MHz and 5MHz, have a single set of resource blocks/PRBs for DA, while larger cell bandwidths, such as 10MHz, 15MHz and 20MHz, have multiple sets of resource blocks/DA.

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

Fig. 5 illustrates a method of processing an allocation indication 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, =50 PRBs. The cell bandwidth is divided into two resource block sets/DA: a first set of 25 PRBs/DA (i.e., DA 0) and a second set of 25 PRBs/DA (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 (Resource Indication Value, RIV). The UE uses the RIV to determine an index of the virtual RB (step 102). Depending on whether a centralized or a distributed allocation, 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 centralized allocation, the index of the virtual RB is mapped directly to the index of the PRB, i.e., both are identical. In example #1 in fig. 6A and 6B, the UE receives an allocation message with riv=79. The UE determines that the virtual resource blocks are marked by the indices 4,5,6, 7. These correspond to PRBs {4,5,6,7} in slot 0 and PRBs {4,5,6,7} in slot 1. In this example, the UE is allocated resources in da=0. If a UE is allocated resources in da=1, the UE applies an offset to these indexes to determine the index of PRBs in da=1.

Referring to fig. 5, for distributed allocation, the UE maps indexes of virtual RBs to indexes of PRBs. The mapping may vary between time slots. In example #2 of fig. 6A, 6B, the UE also receives an allocation message with riv=79. The UE determines that the virtual resource blocks are marked by the indices 4,5,6, 7. The UE maps these indexes of virtual RBs to PRBs. 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 discrete locations in the DA. In this example, the allocation is in DA1. Thus, the UE applies an offset (=25, i.e., the size of one DA) to the index of the PRB determined above to obtain the indices {32, 38, 44, 27} in DA1, slot 0 and the indices {44, 26, 32, 39} in DA1, slot 1. Distributed allocation may bring about frequency diversity advantages due to the distribution within the resource block set/DA and the different allocations in the different time slots.

As described below, there may be hops between resource block sets/DAs. This may bring about additional frequency diversity.

3GPP TS 36.211 defines virtual resource blocks of a centralized 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 for allocation across the entire cell bandwidth. With some modifications, this existing scheme may be reused. One modification is that the resource allocation (centralized or distributed) is limited to the resource block set/DA, not the entire cell bandwidth. Thus, rather than a resource block distribution mechanism that spans 25 RBsBy 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.

Thus, whenBy using +.6.2.3.2 of 3GPP TS 36.211>Replacement->FeMTC UE can utilize a hybrid RA type 2 resource allocation method. When cell bandwidth->When (i.e. cell bandwidth < 25 resource blocks), as described in the existing LTE standard, the RA type 2 method can be used because of the accessThe receiver should be able to be configured to receive all +.>And resource blocks.

For the followingFor RIV, only +.>And a number of bits.

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

For the distributed type allocation of RA type 2, due toAccording to section 6.2.3.2 of 3gpp ts 36.211, no DCI bits are needed to indicate the gap value N _gap,1 Or (b) _Ngap,2 And N _gap,1 Will always be used.

Distribution area offset

When (when)At this time, as shown in fig. 4, the entire cell bandwidth may be accessed for allocation of RA type 2, i.e., DA may span the entire bandwidth and no space is available for shifting DA. The frequency diversity gain may be obtained by a method using distributed type allocation instead of narrowband hopping.

When (when)When the DA offset and the DA jump are not applicable. In contrast, RA type 2 distributed resource allocation may be used for frequency diversity performance gains.

When (when)At this time, since 25 or more RBs cannot be spanned, the DA cannot access certain cell bandwidth portions when using RA type 2. This is undesirable because the non-DA portion of the cell bandwidth may provide additional frequency diversity or allow further scheduling multiplexing (further scheduling multiplexing, FDM) of the UE. In addition, there may be a case where the DA is placed in a fading section of the bandwidth, resulting in degradation of the received signal quality. If desired, the eNodeB should be able to schedule the DA of the UE to another preferred portion of the cell bandwidth. This may occur when the eNodeB is aware of the channel quality of the resource block or group of resource blocks (e.g., by CQI reporting). For this reason, in order to be able to utilize the entire available cell bandwidth, the eNodeB may use some extra bits to indicate the offset value of DA (starting from rb#0).

The number of bits required to signal the DA offsetCan depend on the cell bandwidth +.>And granularity of the offset(in RB) and is given by:

distributed area hopping

A jump between different DAs is possible. This is called band hopping or DA hopping. The 3GPP standard defines narrowband hopping. This allows the UE to hop between narrowband within the cell bandwidth. When band hopping is enabled, the UE may use the DA offset index to derive the start position of the DA and follow a version 13 hopping pattern similar to that signaled by higher layers to hop the DA during repetition. The UE hops between DA's. The UE may occupy consecutive PRB groups (centralized allocation) or a distributed number of PRBs (distributed allocation) and then jump to a different DA within the cell bandwidth and occupy the PRBs within the new DA. The jump between DA is 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 hops.

This option may be used when the eNodeB has sub-band CQI information that can be used by allocating the best consecutive physical RBs to the UE. All RBs may be accessed through a combination of centralized allocation within the DA and DA offsets. When the channel is unstable (sta) or near stable, this option may not be used for repetition because the quality of the selected RB may be degraded during repetition.

Centralized hybrid RA type 2 with DA hops.

This option may 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 hops.

This option may be used in the following cases:

the eNodeB wants to perform the reduced allocation at a wider band level (25 RBs) than in the RB level. Thus, it selects the best offset to direct the DA into the area of best quality. 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 of 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, as the quality of the selected offset may not always be the best throughout the repetition.

Distributed hybrid RA type 2 with DA hops.

This option may be used when the eNodeB does not have (reliable) channel quality information or wishes not to perform any frequency dependent scheduling. Thus, this option enables two of the available frequency diversity techniques, distributed types, and frequency hopping. It can be used for repetition, especially for unstable channels.

LTE specification update

New DCI

One possible implementation of the new downlink control information (Downlink Control Information, DCI) format is a hybrid DCI between DCI 6-1A and DCI format 1B (RA type 2 part). The proposed Resource Block Allocation (RBA) bit stream comprises:

a bit for indicating an RA-type 2 centralized or distributed type RIV, wherein ++>Is the maximum RIV bit.

A bit for enabling/disabling DA-jumping only when +.>The method is applicable.

A bit for indicating DA offset, only when +.>The method is applicable. The DA offset number of bits depends on the cell bandwidth and is selected to be +.>Offset granularity of (2). This offset granularity is a suitable granularity because it keeps the signaling overhead at a low level and because it is a common factor for cell bandwidths of 25, 50, 75 and 100 RBs.

Thus, the first and second substrates are bonded together,

fig. 8 summarizes the resulting number of bits per field.

One possible implementation of a 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 part of DCI, not the following:

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

wherein a value of 0 indicates that frequency hopping is not enabled, and a value of 1 indicates that frequency hopping is enabled;

resource block allocation-, as defined in 3gpp TS 36.213And a number of bits for a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH).

As defined in 3gpp TS 36.211 section 6.2.7,the most significant bits (Most Significant Bit, MSB) provide a narrowband index;

-5 bits providing an indicated intra-narrowband resource allocation using DL resource allocation type 2.

-centralized/distributed VRB allocation flag-1 bit as defined in 7.1.6.3 of 3gpp TS 36.213;

resource block allocation of centralized and distributed vrbs—Bits of

If version 14CE mode AUE:

-if

-Resource allocation is provided by a single bit

-if

-a frequency hopping flag-1 bit, as defined in section 6.4.1 of 3gpp TS 36.213, wherein a value of 0 indicates that frequency hopping is not enabled and a value of 1 indicates that frequency hopping is enabled;

-resource allocation is provided by a single bit

-The MSB bits provide the DA offset index.

-9 bits to provide a resource allocation value (RIV) for a centralized or distributed VRB, as defined in 3gpp TS 36.213 section 7.1.6.3;

-if-least significant bits (Least Significant Bit, LSB) unused

-otherwise

-for a centralized VRB:

resource allocation is provided by a single bit

-for distributed VRB:

-for the case of

-Resource allocation is provided by a single bit

-for the case of

-1 bit, MSB indicates a gap value, wherein a value of 0 indicates N _gap ＝N _gap,1 A value of 1 indicates N _gap ＝N _gap,2

-The individual bits provide the resource allocation.

Note that the DCI proposed above requiresThe RBA bits are similar to release 8DCI format 1A and DCI format 1B. Thus, a UE capable of receiving cell bandwidths up to 20MHz may compile RBA bits similar to DCI format 1A/1B. This means that the proposed DCI serves both 5MHz competent UEs and up to 20MHz competent UEs.

Distribution area definition

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

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

the distribution areas are numbered as follows in the order of increasing physical resource block numbers-1, wherein the area n is distributed _DA Consists 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 resources may 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 for the proposed resource allocation method. If any of these alternatives is selected, the LTE specification update presented later needs to be adjusted accordingly.

Hybrid resource allocation using DCI Format 1C RIV

DCI format 1C uses a coarser but similar type of localized/distributed resource allocation compared to DCI formats 1A and 1B, and therefore, as shown in fig. 9, it requires fewer bits to indicate the RIV value. 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 allocation process to be atOnly centralized type allocation is used. This is because frequency diversity can be obtained by the DA hopping mechanism instead of distributed type allocation. By doing so, as shown in fig. 9, the centralized/distributed indicator flag in the DCI message is not required, and when +.>When the total resource allocation related portion 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 the downlink resource allocation type 2 is very similar to the uplink resource allocation type 0. The difference is that for the uplink, the distributed type allocation is replaced by uplink hopping. Thus, the downlink centralized/distributed flag is replaced by an uplink frequency hopping flag. In addition, the RBA length is the same between these two resource allocation methods.

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

By use in the above-mentioned "distribution area definition" sectionReplacement->To derive the uplink "distribution area" (DA) and its attributes.

The same can be said for the number of uplink resource allocation bits shown in fig. 11. Note that when in useReplacement->And replaces the centralized/distributed flag with the frequency hopping flag, fig. 11 is the same as fig. 8.

When (when)When uplink frequency hopping can be used. For frequency diversity performance gain, this may be enabled by uplink resource allocation type 0.

When (when)When, the uplink resource allocation type 0 may be combined with the DA offset in the same manner as the downlink resource allocation type 2 and the 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 frequency hopping using DA, by using in section 5.3.4 of 3GPP TS 36.211Replacement->Resource block allocation may be implemented.

For uplink frequency hopping using DA, a second N is not required _{UL_hop} Bits, because the uplink allocation cannot span more than 25 resource 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 a5 MHz-competent FeMTC mode a device and a 20 MHz-competent FeMTC mode a device. When the 5 MHz-capable 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, its allocated RBs may be extracted using legacy resource uplink allocation type 0 again. When the UE having a channel bandwidth of 20MHz 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-capable FeMTC UE may reuse 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 (when)And DCI is received by FeMTC mode a devices that are competent for 5MHz, LSBs of the RIV may be discarded.

Fig. 13 and 14 compare packet error rate (packet error rate, PER) performance between the following three resource allocation methods:

1. centralized without DA-hopping:

for all subframes, 12 consecutive RBs indexed from RB#0 to RB#11 are allocated.

2. Centralized with DA hopping:

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

3. Distributed resource allocation type 2 (legacy):

allocation of 12 consecutive virtual RBs of type 2 is allocated using distributed type resources.

The simulation parameters are shown in the following table:

parameters (parameters)	Value of	Parameters (parameters)	Value of
				Duplex	FDD	MCS	4(QPSK 1/3)
Cyclic prefix	Standard of	HARQ	Enabling
				Transmission mode	TM1(1x1)	Channel estimation	Ideal for
Cell bandwidth	5MHz	Repeating	1
				Allocated RBs	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 centralized allocation of 12 PRBs with hops compared to the centralized allocation of 12 PRBs without hops. 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 implemented as any form of computing and/or electronic device, in which the above-described system and method embodiments may be implemented. The processing means 300 comprises 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 other components of the device via one or more buses 306. The processor-executable instructions 303, such as the memory 302, may be provided using any computer-readable medium. The processor-executable instructions 303 may include instructions for implementing the functions of the described methods. The memory 302 may be of any suitable type, such as read-only memory (ROM), random access memory (random access memory, RAM), and any type of storage device, such as magnetic or optical storage devices. The data 304 used by the processor may be stored in the memory 302 or in additional memory. The data 304 includes the described timing data. The processing device 300 includes a wireless transceiver 308.

The above embodiments are provided as examples only. The disclosure of the present application is not limited to the specific combination of steps shown in the drawings and described herein, but includes any suitable subset or combination 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 can perform methods and functions in accordance with examples of this 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 device" includes mobile telephones, 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 set forth herein may be extended or altered without losing the effect sought.

Those skilled in the art can adapt the examples to any telecommunication network, such as 2g,3g,4g,5g or any other telecommunication 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 solving any or all of the problems or those having any or all of the benefits and advantages.

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

The steps of the methods described herein may be performed in any suitable order, or simultaneously where appropriate. In addition, 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 loss of the effect 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 of allocating radio resources for a wireless device, the method comprising: at the location of the wireless node(s),

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 a frequency domain, a 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 one of the sets of resource blocks;

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

the indication of the set of allocated resource blocks is 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 is an indication of an offset from the first set and in the number of sets;

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

2. The method of claim 1, wherein the allocation indication comprises an indication of an allocation type comprising two allocation types:

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

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

3. The method according to claim 1, characterized in that the indication of allocated resource blocks in the set of allocated resource blocks is resource allocation type 2 as defined in 3gpp TS 36.213.

4. The method of claim 1, wherein the allocation indication indicates whether frequency hopping is enabled between different sets of resource blocks.

5. The method of claim 1, wherein the resource block sets are the same size.

6. The method of claim 1, wherein a size of a set is variable based on the total bandwidth of the wireless node.

7. The method of claim 1, wherein the node bandwidth is one of 10MHz, 15MHz, and 20MHz, and the number of resource block sets corresponds to 2, 3, and 4, respectively.

8. The method of claim 1, wherein the allocation indication comprises:

a 1-bit indication of allocation type;

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

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

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

9. The method of claim 8, wherein the multi-bit indication of the allocated resource blocks is a maximum of 7 bits.

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

receiving an allocation indication of radio 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 comprising 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 of allocated resource blocks within a set of resource blocks;

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

11. The method according to the preceding claim 10, characterized in that the allocation is an allocation of downlink channel resources.

12. The method according to the preceding claim 10, characterized in that the allocation is an allocation of uplink channel resources.

13. The method of claim 10, wherein the wireless device is a machine type communication device.

14. The method of claim 10, wherein the wireless device is a machine type communication device having a channel bandwidth of up to 5 MHz.

15. A method of allocating radio resources for a machine type communication wireless device, the method comprising: at the location of the wireless node(s),

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 the allocation type, including two possible allocation types:

centralized allocation of consecutive resource blocks;

distributed allocation of resource blocks;

the allocation indication further comprises:

a 1-bit indication of allocation type;

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

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

16. A method of 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 radio resources 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 the allocation type, including two possible allocation types:

centralized allocation of consecutive resource blocks;

distributed allocation of resource blocks;

the allocation indication further comprises:

a 1-bit indication of allocation type;

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

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

17. The method according to claim 15 or 16, characterized in that the maximum size of the bandwidth is 24 or 25 resource blocks.

18. The method according to claim 15 or 16, characterized in that the indication of allocated resource blocks is resource allocation type 2 as defined in 3gpp TS 36.213.

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

20. A computer readable storage medium comprising a machine readable medium carrying instructions which, when executed by a processor, perform the method of any one of claims 1-18.