EXHIBIT 25

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US00897 1279B2 

(12) United States Patent (10) Patent No.: US 8,971,279 B2 

Seo et al. (45) Date of Patent: Mar. 3, 2015 

(54) METHOD AND APPARATUS FOR (58) Field of Classification Search 

INDICATING DEACTIVATION OF 

SEM-PERSISTENT SCHEDULING 

(71) 

(72) 

Applicant: LG Electronics Inc., Seoul (KR) 

Inventors: Dong Youn Seo, Anyang-Si (KR); Ki 

Jun Kim, Anyang-Si (KR); Dae Won 

Lee, Anyang-Si (KR); YoungWoo Yun, 

Anyang-Si (KR); Joon Kui Ahn, Anyang-Si (KR) 

(*) Notice: Subject to any disclaimer, the term of this 

patent is extended or adjusted under 35 

U.S.C. 154(b) by 166 days. 

(21) 

(22) 

Appl. No.: 13/791.421 

Filed: Mar. 8, 2013 

(65) Prior Publication Data 

US 2013/O182679 A1 Jul.18, 2013 

Related U.S. Application Data 

Continuation of application No. 13/050,680, filed on 

Mar. 17, 2011, now Pat. No. 8,411,633, which is a 

continuation of application No. 12/581.584, filed on 

Oct. 19, 2009, now Pat. No. 8,009,606. 

Provisional application No. 61/114,440, filed on Nov. 

13, 2008, provisional application No. 61/119,375, 

filed on Dec. 3, 2008. 

(63) 

(60) 

(30) Foreign Application Priority Data 

Jul. 24, 2009 (KR) ........................ 10-2009-OO67796 

(51) Int. Cl. 

H0474/00 

H047 72/04 

U.S. C. 

CPC ........ H04W 72/0446 (2013.01); H04W 72/042 

(2013.01) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 370/329 

(2009.01) 

(2009.01) 

(52) 

USPC 

Downiak slot Tlot 

i ii i SEI 

CPC ........... H04W 72/042; H04W 72/0446; H04L 

1/0072; H04L 1/0079; H04L 5/0053: H04L 

1/004; H04L 1/0061; H03M 13/09 

USPC ............ 370/319,329, 321,349; 455/17, 560, 

455/561 

See application file for complete search history. 

(56) References Cited 

U.S. PATENT DOCUMENTS 

2008/0090583 A1 

2008.0117891 A1 

4/2008 Wang et al. 

5/2008 Damnjanovic et al. 

(Continued) 

FOREIGN PATENT DOCUMENTS 

CN 101111009 A 1, 2008 

CN 1.01132596 A 2, 2008 

EP 22O7394 * 4/2009 

JP 2007-166295. A 6, 2007 

(Continued) 

OTHER PUBLICATIONS 

"3rd Generation Partnership Project; Technical Specification Group 

Radio Access Network; Evolved Universal Terrestrial Radio Access 

(E-UTRA); Radio Resource Control (RCC); Protocol Specification 

(Release 8), 3GPP Organizational Partners, 3GPP TS 36.331 V8.4. 

0, Dec. 2008. 

Primary Examiner — Raj Jain 

(74) Attorney, Agent, or Firm — Robert D. Shedd: Joseph J. 

Opalach 

(57) ABSTRACT 

A method and apparatus for performing semi-persistent 

scheduling (SPS) deactivation in a wireless mobile commu 

nication system are disclosed. A base station (BS) transmits a 

downlink control channel to a user equipment (UE), and 

deactivates the SPS when a binary field indicating resource 

allocation information contained in the downlink control 

channel is entirely filled with 1. 

20 Claims, 20 Drawing Sheets 

i - NDLRB k=NENE -l 

Resource block 

NS: NSP - Resource element 

Resource element k, 

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Page 2 

(56) References Cited FOREIGN PATENT DOCUMENTS 

U.S. PATENT DOCUMENTS JP 2010-503342 A 1, 2010 

JP 2010-522467 A T 2010 

2008. O130590 A1 6, 2008 Kim et al. KR 10-2008-0032825 A 4/2008 

2008/0232284 A1 9/2008 Dalsgaard et al. WO WO 2005, O72O73 A2 8, 2005 

2009/0257408 A1* 10/2009 Zhang et al. .................. 370,336 WO WO 2008/023649 A1 2, 2008 

2010.0085881 A1 4/2010 Tanigawa et al. WO WO 2008/030936 A2 3, 2008 

2010/0111026 A1 5, 2010 HSu WO WO 2008/038530 A1 4/2008 

2010/0177716 A1 7, 2010 Harada et al. 

2013/032235.0 A1* 12/2013 Gaur et al. .................... 370,329 * cited by examiner 

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U.S. Patent Mar. 3, 2015 Sheet 1 of 20 US 8,971,279 B2 

[ '0IJI 

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U.S. Patent Mar. 3, 2015 Sheet 2 of 20 US 8,971,279 B2 

SLJdn do)SLIMCI 

---. 

2 '0IH

~~) 

 

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U.S. Patent Mar. 3, 2015 Sheet 3 of 20 US 8,971,279 B2 

FIG. 3 

at ULMIRB 

Resource block 

NUL, xNRB-1 Resource element symb '' sc 

Resource element (k,) 

5.a.3. 

 

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U.S. Patent Mar. 3, 2015 Sheet 4 of 20 US 8,971,279 B2 

FIG. 4 

Downlink slot Tlot 

A w 

(N 3ab OFDM Symbol 

a DLNIRB 

Resource block 

NDL., xNRB-1 Resource element symb' sc 

Z.22| Resource element (k,l) 

Z.2222 

 

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U.S. Patent Mar. 3, 2015 Sheet 5 of 20 

FIG. 5 

502 

Core Network (CN) 

L/ 505 

Access Gateway 

US 8,971,279 B2 

(AG) 

E-UTRAN 1-- SOI 

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U.S. Patent Mar. 3, 2015 Sheet 6 of 20 

FIG. 6 

FIG. 

RRC 

RLC 

MAC 

PHY 

E-UTRAN 

PDCP 

RLC 

MAC 

PHY 

E-UTRAN 

US 8,971,279 B2 

 

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U.S. Patent Mar. 3, 2015 Sheet 19 of 20 US 8,971,279 B2 

FIG. 20 

SO 

51 

53 - RFUNITUNIT PROCESSO 

DISPLAY 

UNIT 

USER 

INTERFACE 

UNIT 

54 

MEMORY 

55 

 

 

 

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U.S. Patent Mar. 3, 2015 Sheet 20 of 20 US 8,971,279 B2 

FIG. 21 

BS E 

Fill the entirety of binary 

field indicating resource 

allocation information 

contained in downlink 

control channel with 

Perform SPS deactivation 

when binary field indicating 

resource allocation information 

Contained in downlink control 

channel is entirely filled with 1 

S2 (4. 

 

 

 

 

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US 8,971,279 B2 

1. 

METHOD AND APPARATUS FOR 

INDICATING DEACTIVATION OF 

SEM-PERSISTENT SCHEDULING 

CROSS-REFERENCE TO RELATED 

APPLICATIONS 

This application is a Continuation of U.S. patent applica 

tion Ser. No. 137050,680 filed on Mar. 17, 2011, which is a 

Continuation of U.S. patent application Ser. No. 12/581,584 

(now U.S. Pat. No. 8,009,606, issued on Aug. 30, 2011) filed 

on Oct. 19, 2009, which claims the benefit of Korean Patent 

Application No. 10-2009-0067796, filedon Jul. 24, 2009, and 

also claims the benefit of U.S. Provisional Application Ser. 

Nos. 61/114,440, filed on Nov. 13, 2008 and 61/119,375, filed 

on Dec. 3, 2008. The entire contents of all of the above 

applications are hereby incorporated by reference. 

BACKGROUND OF THE INVENTION 

1. Field of the Invention 

The present invention relates to a wireless communication 

system, and more particularly, to a method for scheduling radio resources for semi-persistent uplink/downlink packet 

data transmission in a cellular wireless communication sys 

tem, a structure of scheduling information, a scheme for 

transmitting the scheduling information, and an apparatus 

using the above-mentioned method and scheme as well as the 

scheduling information structure. 

2. Discussion of the Related Art 

A3" Generation Partnership Project Long Term Evolution 

(3GPP LTE) communication system (hereinafter referred to 

as an “LTE system for convenience of description) will 

hereinafter be described as an example of a mobile commu 

nication system applicable to the present invention. 

A frame structure for use in the LTE system will hereinafter 

be described. The 3GPP LTE system supports a type 1 radio 

frame structure applicable to frequency division duplex 

(FDD), and a type 2 radio frame structure applicable to time 

division duplex (TDD). 

FIG. 1 shows a structure of a type 1 radio frame used in the 

LTE system. The type 1 radio frame includes 10 subframes, 

each of which consists of two slots. A time length of each 

constituent unit is shown in FIG. 1. 

FIG. 2 shows a structure of a type 2 radio frame used in the 

LTE system. The type 2 radio frame includes two half-frames, 

each of which is composed of five subframes, a downlink 

piloting time slot (DwPTS), a guard period (GP), and an 

uplink piloting time slot (UpPTS), in which one subframe 

consists of two slots. That is, one subframe is composed of 

two slots irrespective of the radio frame type. A time length of 

each constituent unit is shown in FIG. 2. 

A resource grid structure for use in the LTE system will 

hereinafter be described in detail. 

FIG.3 shows an uplink (UL) time-frequency resource grid 

structure for use in the 3GPP LTE system. Referring to FIG.3, an uplink signal transmitted from each 

slot can be described by a resource grid including No.' 

Ns subcarriers and No.' Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols. Here, 

N' represents the number of resource blocks (RBs) in an 

uplink, Ns' represents the number of subcarriers constitut 

ingone RB, and No,' represents the number of SC-FDMA symbols in one uplink slot. N' varies with an uplink 

transmission bandwidth constructed in a cell, and must satisfy 

N"'sN'sN"''''. Here, N'-' is the small 

est uplink bandwidth supported by the wireless communica 

10 

15 

25 

30 

35 

40 

45 

50 

55 

60 

65 

2 

tion system, and No"' is the largest uplink bandwidth 

Supported by the wireless communication system. Although 

N'Y' may be set to 6 (N'-6) and N'-' may be set to 110 (N"''''-110), the scopes of N."' and 

N"--' are not limited thereto. The number of SC-FDMA 

symbols contained in one slot may be differently defined 

according to the length of a Cyclic Prefix (CP) and the spacing 

between subcarriers. 

Each element contained in the resource grid is called a 

resource element (RE), and can be identified by an index pair 

(k.l) contained in a slot, where k is an index in a frequency domain and is set to any one of 0,...,N',N'-1, and 1 

is an index in a time domain and is set to any one of 0, . . . . N'-1 simb 

A Physical Resource Block (PRB) is defined by No." 

consecutive SC-FDMA symbols in a time domain and Ns' 

consecutive subcarriers in a frequency domain. No '' and 

Ns' may be predetermined values, respectively. Therefore, 

one PRB in an uplink may be composed of N.'xNs. 

resource elements. In addition, one PRB may correspond to 

one slot in a time domain and 180 kHz in a frequency domain. 

A PRB number n and a resource element index (kl) in a 

slot can satisfy a predetermined relationship denoted by 

k iPRB li 

FIG. 4 shows a downlink (DL) time-frequency resource 

grid structure for use in the LTE system. 

Referring to FIG. 4, a downlink signal transmitted from 

each slot can be described by a resource grid including 

NPNs' subcarriers and Nsm P-OFDM symbols. Here, 

N' represents the number of resource blocks (RBs) in a 

downlink, Ns' represents the number of subcarriers con 

stituting one RB, and N, ,' represents the number of 

OFDM symbols in one downlink slot. D' varies with an 

uplink transmission bandwidth constructed in a cell, and must 

satisfy N"'P'sNPsN"P. Here, N." P is the 

smallest uplink bandwidth supported by the wireless commu 

nication system, and N' is the largest uplink band 

width supported by the wireless communication system. Although No"' may be set to 6 (N"'-6) and 

N"'P may be set to 110 (N"'P-110), the scopes of 

N"' and N' are not limited thereto. The number 

of OFDM symbols contained in one slot may be differently 

defined according to the length of a Cyclic Prefix (CP) and the 

Subcarrier spacing. When transmitting data or information via 

multiple antennas, one resource grid for each antenna port 

may be defined. 

Each element contained in the resource grid is called a 

resource element (RE), and can be identified by an index pair 

(k.l) contained in a slot, where k is an index in a frequency domain and is set to any one of 0,...,N',N'-1, and 1 

is an index in a time domain and is set to any one of 0, . . . . NP-1. symb 

Resource blocks (RBs) shown in FIGS. 3 and 4 are used to 

describe a mapping relationship between certain physical 

channels and resource elements (REs). The RBs can be clas 

sified into physical resource blocks (PRBs) and virtual 

resource blocks (VRBs). Although the above mapping rela 

tionship between the VRBs and the PRBs has been disclosed 

on a downlink basis, the same mapping relationship may also 

be applied to an uplink. 

One PRB is defined by N. S consecutive OFDM sym bols in a time domain and Ns “consecutive subcarriers in a 

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3 

frequency domain. No ,' and Ns may be predetermined values, respectively. Therefore, one PRB may be composed 

of N.'xNs. resource elements. One PRB may corre 

spond to one slot in a time domain and may also correspond 

to 180 kHz in a frequency domain, but it should be noted that 

the scope of the present invention is not limited thereto. 

The PRBs are assigned numbers from 0 to N'-1 in the 

frequency domain. A PRB number n, and a resource ele 

ment index (kl) in a slot can satisfy a predetermined relation 

ship denoted by 

k iPRB l 

The VRB may have the same size as that of the PRB. Two 

types of VRBs are defined, the first one being a localized VRB 

(LVRB) and the second one being a distributed type (DVRB). 

For each VRB type, a pair of VRBs in two slots of one 

Subframe may assigned a single VRB number n. 

The VRB may have the same size as that of the PRB. Two 

types of VRBs are defined, the first one being a localized VRB 

(LVRB) and the second one being a distributed VRB 

(DVRB). For each VRB type, a pair of PRBs may have a 

single VRB index (which may hereinafter be referred to as a 

VRB number) and are allocated over two slots of one sub 

frame. In otherwords, N' VRBs belonging to a firstone of 

two slots constituting one subframe are each assigned any one 

index of 0 to NP-1, and N' VRBs belonging to a 

second one of the two slots are likewise each assigned any one 

index of 0 to N'-1. 

In the LTE system based on an Orthogonal Frequency 

Division Multiple Access (OFDMA) scheme, a resource area 

in which each UE is able to transmit or receive data to and 

from a base station (BS) is allocated from the BS to the UE. In 

this case, not only a time resource but also a frequency 

resource must be simultaneously allocated to the UE so as to 

complete resource allocation. 

The so-called non-persistent scheduling method can 

simultaneously indicate time-frequency resource domains 

allocated to the UE. Therefore, if there is a need for the UE to 

use resources for a long period of time, it must repeatedly 

perform signaling for resource allocation, so that signaling overhead may be considerably generated. 

In contrast, the so-called semi-persistent scheduling 

method first allocates a time resource to a UE. In this case, the 

semi-persistent scheduling method may allow the time 

resource allocated to a specific UE to have periodicity. Then, 

the semi-persistent scheduling method allocates a frequency 

resource to the UE when necessary to complete time-fre 

quency resource allocation. The above-mentioned frequency 

resource allocation may be referred to as activation. When 

using the semi-persistent scheduling method, resource allo 

cation can be maintained for a predetermined period by only 

one signaling process, so that resources need not be repeat 

edly allocated, resulting in reduction in signaling overhead. 

Thereafter, if the necessity of performing resource allocation 

for a UE disappears, a base station can transmit a signaling 

message for releasing the frequency resource allocation to the 

UE. In this way, the above-mentioned release of the frequency 

resource domain may be referred to as deactivation. In this 

case, it is preferable that the signaling overhead needed for the 

deactivation be reduced. 

SUMMARY OF THE INVENTION 

An object of the present invention devised to solve the 

problem lies in a method and apparatus for informing a UE of 

10 

15 

25 

30 

35 

40 

45 

50 

55 

60 

65 

4 

SPS deactivation without adding a new bit field or a new 

control channel format in a communication system for allo 

cating resources using a compact Scheme. 

The object of the present invention can be achieved by providing a method for releasing resource allocation in a 

wireless mobile communication system, the method includ 

ing receiving, by a user equipment (UE), a downlink control 

channel including resource allocation information, and 

releasing resource allocation for the UE when a binary field 

indicating the resource allocation information is entirely 

filled with 1. 

In another aspect of the present invention, there is provided 

a method for transmitting a signal for releasing resource 

allocation in a wireless mobile communication system, the 

method including fills, by a base station (BS), a binary field 

indicating resource allocation information contained in a 

downlink control channel with 1, and transmitting the 

downlink control channel to a user equipment (UE), wherein 

the binary field entirely filled with the value of 1 indicates a 

release of resources allocated to the UE. 

In another aspect of the present invention, there is provided 

a method for deactivating semi-persistent scheduling (SPS) in 

a wireless mobile communication system including receiv 

ing, by a user equipment (UE), a downlink control channel, 

and deactivating the semi-persistent scheduling (SPS) when a 

binary field indicating resource allocation information con 

tained in the downlink control channel is entirely filled with 

1. 

In another aspect of the present invention, there is provided 

a method for transmitting a signal for semi-persistent sched 

uling (SPS) deactivation in a wireless mobile communication 

system, the method including filling, by a base station (BS), a 

binary field indicating resource allocation information con 

tained in a downlink control channel with 1, and transmit 

ting the downlink control channel, wherein the binary field 

entirely filled with the value of 1 indicates the SPS deacti 

Vation. 

In another aspect of the present invention, there is provided 

an apparatus capable of using a semi-persistent scheduling 

(SPS). The apparatus includes a radio frequency (RF) unit, 

and a processor electrically connected to the RF unit, wherein 

the processor is configured to receive a downlink control 

channel through the RF unit, and to perform the SPS deacti 

Vation when a binary field indicating resource allocation 

information contained in the downlink control channel is 

entirely filled with 1. 

In another aspect of the present invention, there is provided 

an apparatus capable of using a semi-persistent scheduling 

(SPS). The apparatus includes a radio frequency (RF) unit, 

and a processor electrically connected to the RF unit. The 

processor is configured to fill the entirety of a binary field 

indicating resource allocation information contained in a 

downlink control channel with 1 during the SPS deactiva 

tion, and to transmit the downlink control channel with the RF 

unit. The binary field entirely filled with 1 indicates the SPS 

deactivation. 

In another aspect of the present invention, there is provided 

a user equipment (UE) for a wireless mobile communication 

system, the user equipment (UE) including a radio frequency 

(RF) unit, and a processor electrically connected to the RF 

unit, wherein the processor is configured to receive a down 

link control channel including resource allocation informa 

tion through the RF unit, and to release resource allocation for 

the UE when a binary field indicating the resource allocation 

information is entirely filled with 1. 

In another aspect of the present invention, there is provided 

a wireless communication apparatus including a radio fre 

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5 

quency (RF) unit, and a processor electrically connected to 

the RF unit, wherein the processor is configured to fill the 

entirety of a binary field indicating resource allocation infor 

mation contained in a downlink control channel with 1, and 

to transmit the downlink control channel to a user equipment 

(UE), the binary field being entirely filled with the value of 1 

indicates a release of resources allocated to the UE. 

The downlink control channel may be a physical downlink 

control channel (PDCCH). 

A downlink control information (DCI) format of the down 

link control channel may be a format 0 or a format 1A. 

The wireless mobile communication system may use a 

scheduling based on a compact scheme, and the binary field 

may be composed of a field indicating a resource indication 

value (RIV). 

The wireless mobile communication system may use a 

scheduling based on a compact scheme, and the binary field 

may be composed of a field indicating a resource indication 

value (RIV) and a field indicating Gap information used for 

distributed allocation of resources. 

The wireless mobile communication system may use a 

scheduling based on a compact scheme, and the binary field 

may be composed of a field indicating a resource indication 

value (RIV) and a field indicating hopping information. 

The resource allocation information may be composed of 

resource block allocation information, or may be composed 

of resource block allocation information and hopping resource allocation information. 

The resource block allocation information may be repre 

sented by the RIV. The RIV may indicate a pair of a start 

index (S) and a length (L) of consecutive VRBs capable of 

being combined with each other. 

It is to be understood that both the foregoing general description and the following detailed description of the 

present invention are exemplary and explanatory and are 

intended to provide further explanation of the invention as 

claimed. 

BRIEF DESCRIPTION OF THE DRAWINGS 

The accompanying drawings, which are included to pro 

vide a further understanding of the invention, illustrate 

embodiments of the invention and together with the descrip 

tion serve to explain the principle of the invention. 

In the drawings: 

FIG. 1 shows a structure of a frequency division duplex 

(FDD) type radio frame used in an LTE system. 

FIG. 2 shows a structure of a time division duplex (TDD) 

type radio frame used in an LTE system. 

FIG.3 shows an uplink (UL) resource grid structure for use 

in an LTE system. 

FIG. 4 shows a downlink (DL) resource grid structure for 

use in an LTE system. 

FIG. 5 is a block diagram illustrating an Evolved Universal 

Mobile Telecommunications System (E-UMTS) network 

structure as an example of a mobile communication system. 

FIGS. 6 and 7 illustrate radio interface protocol structures 

between a UE and a UMTS Terrestrial Radio Access Network 

(UTRAN) that are based on a 3GPP LTE radio access network 

standard. 

FIG. 8 shows physical channels used for an LTE system 

and a general signal transmission method capable of using the 

physical channels. 

FIG. 9 is a conceptual diagram illustrating signal process 

ing for enabling a UE to transmit an uplink signal. 

10 

15 

25 

30 

35 

40 

45 

50 

55 

60 

65 

6 

FIG.10 is a conceptual diagram illustrating signal process 

ing for enabling a base station (BS) to transmit a downlink 

signal. 

FIG. 11 is a conceptual diagram illustrating an SC-FDMA 

scheme for transmitting an uplink signal and an OFDMA 

scheme for transmitting a downlink signal in a mobile com 

munication system. 

FIG. 12 is a view illustrating an example of a method for 

mapping distributed virtual resource blocks (DVRBs) and 

localized virtual resource blocks (LVRBs) to physical 

resource blocks (PRBs). 

FIG. 13 is a view illustrating an example of a method for 

allocating resource blocks (RBS) by a compact scheme. 

FIG. 14 is a view illustrating an example of a method for 

mapping two DVRBs having consecutive indexes to a plural ity of contiguous PRBs. 

FIG. 15 is a view illustrating an example of a method for 

mapping two DVRBs having consecutive indexes to a plural ity of spaced PRBs. 

FIG.16 is a view illustrating an example of RIVs when the 

number of available RBs is 20 according to one embodiment 

of the present invention. 

FIG. 17 shows an exemplary structure of a PDCCH field 

for signaling SPS deactivation according to the present inven 

tion. 

FIG. 18 shows individual fields acquired when DVRB 

allocation is carried out in a PDCCH having a DCI format 

1A according to the present invention. 

FIG. 19 shows individual fields of a PDCCH having a DCI 

format 0 according to the present invention. 

FIG.20 is a block diagram illustrating constituent elements 

of a device applicable to the present invention. 

FIG.21 is a flowchart illustrating a method for deactivating 

a semi-persistent scheduling (SPS) according to the present 

invention. 

DETAILED DESCRIPTION OF THE INVENTION 

Reference will now be made in detail to the preferred embodiments of the present invention with reference to the 

accompanying drawings. The detailed description, which 

will be given below with reference to the accompanying drawings, is intended to explain exemplary embodiments of 

the present invention, rather than to show the only embodi 

ments that can be implemented according to the invention. 

The following detailed description includes specific details 

in order to provide a thorough understanding of the present 

invention. However, it will be apparent to those skilled in the 

art that the present invention may be practiced without Such 

specific details. For example, the following description will 

be given centering upon a mobile communication system serving as an LTE system, but the present invention is not 

limited thereto and the remaining parts of the present inven 

tion other than unique characteristics of the LTE system are 

applicable to other mobile communication systems. 

In some cases, in order to prevent ambiguity of the con 

cepts of the present invention, conventional devices or appa 

ratuses well known to those skilled in the art will be omitted 

and be denoted in the form of a block diagram on the basis of 

the important functions of the present invention. Wherever 

possible, the same reference numbers will be used throughout 

the drawings to refer to the same or like parts. 

In the following description, a terminal may include 

mobile or fixed user equipments (UES), for example, a user 

equipment (UE), a mobile station (MS) and the like, and may 

also be referred to in any of these ways as necessary. Also, the 

base station (BS) may be any of nodes included in a network 

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communicating with the UE, for example, a Node B (Node 

B) and an eNode B(eNode-B), and may also be referred to in 

any of these ways. 

In a mobile communication system, a UE can receive infor 

mation from a base station (BS) via a downlink, and the UE 

can also transmit information via an uplink. Information 

transferred from or received by the UE may be data, other 

control information, and the like, and there are a variety of 

physical channels according to types and usages of this infor 

mation transferred or received from or in the UE. 

FIG. 5 shows an Evolved Universal Mobile Telecommuni 

cations System (E-UMTS) network structure serving as an 

example of a mobile communication system. 

The E-UMTS system is an evolved version of the conven 

tional Universal Mobile Telecommunications System 

(UMTS) system and basic standardization thereof is in 

progress under the 3rd Generation Partnership Project 

(3GPP). Generally, the E-UMTS is also referred to as a Long 

Term Evolution (LTE) system. 

The E-UMTS network may be classified into an Evolved— 

UMTS Terrestrial Radio Access Network (E-UTRAN) 501 

and a Core Network (CN)502. The E-UTRAN includes a UE 

503, a BS (eNB or eNode B) 504, and an Access Gateway 

(AG) 505 which is located at an end of a network and is 

connected to an external network. The AG 505 can be divided 

into apart that handles processing of user traffic and apart that 

handles control traffic. Here, the AG part 505 for processing 

new user traffic and the AG part for processing control traffic 

can communicate with each other using a new interface. 

One or more cells may exist for one eNB. An interface for 

transmitting user traffic or control traffic can be used between 

eNBs. A Core Network (CN)502 may include the AG505 and 

a node or the like for user registration of the UE 503. An 

interface for discriminating between the E-UTRAN 501 and 

the CN 502 may be used. 

Radio interface protocol layers between the UE and the 

network can be classified into an L1 layer (first layer), an L2 

layer (second layer) and an L3 layer (third layer) on the basis 

of the lower three layers of the Open System Interconnection 

(OSI) reference model widely known in communication sys 

tems. A physical layer belonging to the L1 layer provides an 

information transfer service utilizing a physical channel. A 

Radio Resource Control (RRC) layer located at the L3 layer 

controls radio resources between the UE and the network. For 

this operation, RRC messages are exchanged between the UE 

and the network via the RRC layers. The RRC layers may be 

distributed among base stations (BSS) 504 and network 

nodes, or may be located only at a base station (BSs) 504 or 

the AG 505. 

FIGS. 6 and 7 illustrate radio interface protocol structures 

between a UE and a UTRAN that are based on a 3GPP LTE 

radio access network standard. 

The radio interface protocol of FIG. 6 or FIG. 7 is divided 

horizontally into a physical layer, a data link layer and a 

network layer, and vertically into a userplane for transmitting 

data information and a control plane for transmitting a control 

signal Such as a signaling message. In more detail, FIG. 6 

shows individual layers of a radio protocol control plane and 

FIG. 7 shows individual layers of a radio protocol user plane. 

Protocol layers of FIGS. 6 and 7 can be classified into an L1 

layer (first layer), an L2 layer (second layer) and an L3 layer 

(third layer) on the basis of the lower three layers of the OSI 

reference model widely known in communication systems. The following is a detailed description of respective layers 

of the radio protocol control plane of FIG. 6 and the radio 

protocol user plane of FIG. 7. 

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8 

The physical layer, which is the first layer, provides an 

information transfer service to an upper layer using a physical 

channel. The physical layer (PHY) is connected to a Medium 

Access Control (MAC) layer, located above the physical layer, through a transport channel. Data is transferred 

between the MAC layer and the physical layer through the 

transport channel. In this case, the transport channel is clas 

sified into a dedicated transport channel and a common trans 

port channel according to whether or not a channel is shared. 

Data transfer between different physical layers, specifically 

between the respective physical layers of a transmitter and a 

receiver, is performed through the physical channel. 

A variety of layers exist in the second layer (L2 layer). The 

MAC layer maps various logical channels to various transport channels, and performs logical-channel multiplexing for 

mapping various logical channels to one transport channel. 

The MAC layer is connected to the RLC layer serving as an 

upper layer through a logical channel. The logical channel 

can be classified into a control channel for transmitting infor 

mation of a control plane and a traffic channel for transmitting information of a user plane according to categories of trans 

mission information. 

The RLC layer of the second layer performs segmentation 

and concatenation on data received from an upper layer, and 

adjusts the size of data to be suitable for a lower layer trans 

mitting data to a radio interval. In order to guarantee various 

Qualities of Service (QoSs) requested by respective radio 

bearers (RBs), three operation modes, i.e., a Transparent 

Mode (TM), an Unacknowledged Mode (UM), and an 

Acknowledged Mode (AM), are provided. Specifically, an 

AM RLC performs a retransmission function using an Auto 

matic Repeat and Request (ARQ) function so as to implement 

reliable data transmission. 

A Packet Data Convergence Protocol (PDCP) layer of the 

second layer (L2) performs a header compression function to 

reduce the size of an IP packet header having relatively large 

and unnecessary control information in order to efficiently 

transmit IP packets such as IPv4 or IPv6 packets in a radio 

interval with a narrow bandwidth. As a result, only informa 

tion required for a header part of data can be transmitted, so 

that transmission efficiency of the radio interval can be 

increased. In addition, in the LTE system, the PDCP layer performs a security function, this security function is com 

posed of a ciphering function for preventing a third party from 

eavesdropping on data and an integrity protection function for 

preventing a third party from handling data. 

A Radio Resource Control (RRC) layer located at the top of 

the third layer (L3) is defined only in the control plane and is 

responsible for control of logical, transport, and physical 

channels in association with configuration, re-configuration 

and release of Radio Bearers (RBs). The RB is a logical path 

that the first and second layers (L1 and L2) provide for data 

communication between the UE and the UTRAN. Generally, Radio Bearer (RB) configuration means that a radio protocol 

layer needed for providing a specific service, and channel 

characteristics are defined and their detailed parameters and 

operation methods are configured. The Radio Bearer (RB) is 

classified into a Signaling RB (SRB) and a Data RB (DRB). 

The SRB is used as a transmission passage of RRC messages 

in the C-plane, and the DRB is used as a transmission passage 

of user data in the U-plane. 

A downlink transport channel for transmitting data from 

the network to the UE may be classified into a Broadcast 

Channel (BCH) for transmitting system information and a 

downlinkShared Channel (SCH) for transmitting user traffic 

or control messages. Traffic or control messages of a down 

link multicast or broadcast service may be transmitted 

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through a downlinkSCH and may also be transmitted through 

a downlink multicast channel (MCH). Uplink transport chan 

nels for transmission of data from the UE to the network 

include a Random Access Channel (RACH) for transmission 

of initial control messages and an uplink SCH for transmis 

sion of user traffic or control messages. Downlink physical channels for transmitting information 

transferred to a downlink transport channel to a radio interval 

between the UE and the network are classified into a Physical 

Broadcast Channel (PBCH) for transmitting BCH informa 

tion, a Physical Multicast Channel (PMCH) for transmitting 

MCH information, a Physical Downlink Shared Channel 

(PDSCH) for transmitting downlink SCH information, and a 

Physical Downlink Control Channel (PDCCH) (also called a 

DL L1/L2 control channel) for transmitting control informa 

tion, such as DL/UL Scheduling Grant information, received 

from first and second layers (L1 and L2). In the meantime, uplink physical channels for transmitting information trans 

ferred to an uplink transport channel to a radio interval 

between the UE and the network are classified into a Physical Uplink Shared Channel (PUSCH) for transmitting uplink 

SCH information, a Physical Random Access Channel for 

transmitting RACH information, and a Physical Uplink Con 

trol Channel (PUCCH) for transmitting control information, 

such as HARQ ACK or NACK Scheduling Request (SR) and 

Channel Quality Indicator (CQI) report information, received 

from first and second layers (L1 and L2). 

FIG. 8 shows physical channels used for a 3GPP LTE 

system serving as an example of a mobile communication 

system and a general signal transmission method capable of 

using the physical channels. 

If a UE is re-powered on after being powered off or newly 

enters a cell region, the UE performs an initial cell search 

process, such as Synchronization with a base station (BS), at 

step S801. For the initial cell search process, the UE receives 

information of a Primary Synchronization Channel (P-SCH) 

and information of a Secondary Synchronization Channel 

(S-SCH) from the base station (BS), is synchronized with the 

BS, and is able to acquire information such as a cell ID or the 

like from the BS. After that, the UE receives information of a 

physical broadcast channel from the BS, such that it can 

acquire inter-cell broadcast information from the BS. In the 

meantime, the UE receives a downlink reference signal (DL 

RS) at the initial cell searching step, so that it can recognize a 

downlink channel status. 

After performing the initial cell search process, the UE 

receives information of a Physical Downlink Control Chan 

nel (PDCCH) and information of a Physical DownlinkShared 

Control Channel (PDSCH) based on the PDCCH informa 

tion, so that it can acquire more detailed system information 

at step S802. 

In the meantime, ifa UE initially accesses the BS or has no 

resources for uplink transmission, the UE can perform a 

Random Access Procedure (RAP), such as steps S803 to 

S806, for the BS. For this operation, the UE transmits a 

specific sequence as a preamble through a Physical Random 

Access Channel (PRACH) at step S803, and receives a 

response message to the random access through a PDCCH 

and a PDSCH at step S804. In case of a competitive-based 

random access except for a handover case, a contention reso 

lution procedure such as step S805 or S806 can then be 

carried out. At step S805, information is transmitted through 

an additional PRACH. At step S806, PDCCH/PDSCH infor 

mation is received. 

After performing the above-mentioned steps, as a proce 

dure for transmitting UL/DL signals, the UE receives infor 

mation of a PDCCH and a PDSCHatstep S807, and transmits 

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information through a Physical Uplink Shared Channel 

(PUSCH) and a Physical Uplink Control Channel (PUCCH) 

at step S808. 

In the LTE system, a signaling process for transmitting 

UL/DL signals is as follows. 

FIG. 9 is a conceptual diagram illustrating signal process 

ing for enabling a UE to transmit an uplink (UL) signal. 

In order to transmit a UL signal, a scrambling module 901 

of the UE can Scramble a transmission signal using a specific scrambling signal of the UE. The scrambled signal is input to 

a modulation mapper 902, and is converted into a complex symbol using a BPSK (Binary Phase Shift Keying)-, QPSK 

(Quadrature Phase Shift Keying)-, or 16 QAM (Quadrature Amplitude Modulation)-scheme according to categories of 

the transmission signal and/or a channel status. After that, the 

modulated complex symbol is processed by a transform pre 

coder 903, and is then input to the resource element mapper 

904. The resource element mapper 904 is able to map a 

complex symbol to a time-frequency element to be used for 

actual transmission. The processed signal may be transmitted 

to the base station (BS) via the SC-FDMA signal generator 

905. 

FIG.10 is a conceptual diagram illustrating signal process 

ing for enabling the base station (BS) to transmit a downlink 

signal. 

In the LTE system, the BS is able to transmit one or more 

codewords via a downlink. Therefore, one or more codewords 

may be processed as complex symbols by the scrambling 

module 1001 and the modulation mapper 1002 in the same 

manner as in the uplink case of FIG. 10. Thereafter, the 

complex symbols are mapped to a plurality of layers by the 

layer mapper 1003, and each layer may be multiplied by a 

predetermined precoding matrix selected depending on a 

channel status and may then be allocated to each transmission 

antenna by the precoding module 1004. The processed trans 

mission signal for each antenna is mapped to a time-fre 

quency resource element to be used for transmission by the 

resource element mapper 1005. After that, the mapped result 

can be transmitted via each antenna after passing through the 

Orthogonal Frequency Division Multiple Access (OFDMA) 

signal generator 1006. 

In the case where a UE for use in a mobile communication 

system transmits an uplink signal, a Peak to Average Power 

Ratio (PAPR) may become more serious than in the case 

where the BS transmits a downlink signal. Thus, as described 

in FIGS. 9 and 10, the SC-FDMA scheme is used for uplink signal transmission in a different way from the OFDMA 

scheme used for downlink signal transmission. 

In the LTE system, the SC-FDMA scheme for uplink signal 

transmission and the OFDMA scheme for downlink signal 

transmission will hereinafter be described in detail. 

FIG. 11 is a conceptual diagram illustrating the SC-FDMA 

scheme for uplink signal transmission and the OFDMA 

scheme for downlink signal transmission in a mobile com 

munication system. Referring to FIG. 11, not only a UE for transmitting an 

uplink signal but also a base station (BS) for transmitting a 

downlink signal includes a Serial-to-Parallel converter 1101, 

a subcarrier mapper 1103, an M-point IDFT module 1104, a 

Parallel-to-Serial converter 1105, and the like. However, a UE 

for transmitting a signal using the SC-FDMA scheme further 

includes an N-point DFT module 1102, and compensates for 

a predetermined part of the IDFT processing influence of the 

M-point IDFT module 1104 so that a transmission signal can 

have single carrier characteristics. 

In a cellular orthogonal frequency division multiplex 

(OFDM) wireless packet communication system, uplink/ 

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downlink (UL/DL) data packet transmission is made on a 

subframe basis and one subframe is defined by a certain time 

interval including a plurality of OFDM symbols. Hereinafter, 

terms used in the detailed description of this application are 

defined as follows. 

A resource element (RE) represents a smallest frequency 

time unit in which data or a modulated symbol of a control 

channel is mapped. Provided that a signal is transmitted in 

one OFDM symbol over M subcarriers and N OFDM sym 

bols are transmitted in one subframe, MxN REs are present in one subframe. 

A physical resource block (PRB) represents a unit fre 

quency-time resource for data transmission. In general, one 

PRB includes a plurality of consecutive REs in a frequency 

time domain, and a plurality of PRBs is defined in one sub 

frame. 

A virtual resource block (VRB) represents a virtual unit 

resource for data transmission. In general, the number of RES 

included in one VRB is equal to the length of REs included in 

one PRB, and, when data is transmitted, one VRB can be 

mapped to one PRB or some areas of a plurality of PRBs. 

A localized virtual resource block (LVRB) is one type of 

the VRB. One LVRB is mapped to one PRB. LVRBs having different logical indexes are mapped to PRBs having different 

physical indexes. An LVRB may be interpreted in the same as a PRB. 

A distributed virtual resource block (DVRB) is another 

type of VRB. One DVRB is mapped to some REs in a plural 

ity of PRBs, and REs to which different DVRBs are mapped 

are not duplicated. 

N=N, represents the number of PRBs to which one 

DVRB is mapped. FIG. 12 illustrates an example of a method 

for mapping DVRBs and LVRBs to PRBs. In FIG. 12, N, 3. 

As can be seen from FIG. 12, an arbitrary DVRB can be 

divided into three parts and the divided parts can be mapped 

to different PRBs, respectively. At this time, the remaining 

part of each PRB, not mapped by the arbitrary DVRB, is 

mapped to a divided part of another DVRB. The LTE system 

has a system structure denoted by N=N=2. 

Semi-Persistent Scheduling (SPS) is a scheduling scheme 

for allocating resources to a specific UE such that the allo 

cated resources can be persistently maintained during a spe 

cific time interval. In the case where a predetermined amount 

of data is transmitted during a specific time in the same 

manner as in a Voice over Internet Protocol (VoIP), control 

information need not be transmitted to each data transmission 

interval for resource allocation, such that an amount of wasted 

control information can be reduced by the SPS scheme. 

N represents the number of PRBs in a system. 

represents the number of LVRBs available in the 

system. 

N, represents the number of DVRBs available in the 

system. 

N, represents the maximum number of LVRBs 

allocable to one user equipment (UE). 

N, represents the maximum number of DVRBs 

allocable to one UE. 

N represents the number of Subsets. - represents the number of frequency bands used 

in a system capable of using a plurality of frequency bands. 

Here, the “number of RBs' means the number of RBs 

classified on a frequency axis. That is, even in the case where 

RBs can be classified by slots constituting a subframe, the 

“number of RBs' means the number of RBs classified on the 

frequency axis of the same slot. 

FIG. 12 shows an example of definitions of LVRBs and 

DVRBS. 

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As can be seen from FIG. 12, each RE of one LVRB is 

mapped one-to-one to each RE of one PRB. For example, one 

LVRB is mapped to a PRB0 (1201). In contrast, one DVRB is 

divided into three parts and the divided parts are mapped to 

different PRBs, respectively. For example, a DVRB0 is 

divided into three parts and the divided parts are mapped to a 

PRB1, PRB4 and PRB6, respectively. Likewise, a DVRB1 

and a DVRB2 are each divided into three parts and the divided 

parts are mapped to the remaining resources of the PRB1, 

PRB4 and PRB6. Although each DVRB is divided into three 

parts in this example, the present invention is not limited 

thereto. For example, each DVRB may be divided into two 

parts. 

Downlink data transmission from a base station (BS) to a 

specific terminal (i.e., a specific UE) or uplink data transmis 

sion from the specific UE to the base station (BS) is per 

formed through one or more VRBs in one subframe. In other 

words, the above-mentioned data transmission may be 

achieved through PRBs corresponding to one or more VRBs. 

When the base station (BS) transmits data to the specific UE, 

it has to notify the terminal of which VRB will be used for 

data transmission. Also, in order to enable the specific UE to 

transmit data, the base station (BS) has to notify the terminal 

of which VRB will be used for data transmission. Specific information indicating how to map VRBs to PRBs can be 

predetermined, so that the UE can automatically recognize 

which PRB will be searched when acquiring information of 

VRBS allocated to the UE itself. 

Data transmission schemes can be broadly classified into a 

frequency diversity scheduling (FDS) scheme and a fre 

quency selective scheduling (FSS) scheme. The FDS scheme 

is a scheme that obtains a reception performance gain through 

frequency diversity, and the FSS scheme is a scheme that 

obtains a reception performance gain through frequency 

selective scheduling. 

In the FDS scheme, a transmission stage transmits one data 

packet over subcarriers widely distributed in a system fre 

quency domain so that symbols in the data packet can expe 

rience various radio channel fadings. Therefore, an improve 

ment in reception performance is obtained by preventing the 

entire data packet from being Subject to unfavorable fading. 

In contrast, in the FSS scheme, an improvement in reception 

performance is obtained by transmitting the data packet over 

one or more consecutive frequency areas in the system fre 

quency domain which are in a favorable fading state. In a 

cellular OFDM wireless packet communication system, a 

plurality of terminals is present in one cell. At this time, 

because the radio channel conditions of the respective termi 

nals have different characteristics, it is necessary to perform 

data transmission using the FDS scheme with respect to a 

certain UE and data transmission using the FSS scheme with 

respect to a different UE even within one subframe. As a 

result, a detailed FDS transmission scheme and a detailed 

FSS transmission scheme must be designed such that the two 

schemes can be efficiently multiplexed within one subframe. 

On the other hand, in the FSS scheme, again can be obtained 

by selectively using a band favorable to a UE among all 

available bands. In contrast, in the FDS Scheme, a comparison is not made as to whether a specific band is good or bad, and, 

as long as a frequency interval capable of adequately obtain 

ing diversity is maintained, there is no need to select and 

transmit a specific frequency band. Accordingly, it is advan 

tageous in terms of improvement in overall system perfor 

mance to perform the frequency selective scheduling of the 

FSS scheme preferentially when scheduling. 

In the FSS scheme, because data is transmitted using sub 

carriers consecutively contiguous in the frequency domain, it 

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is preferable that the data be transmitted using LVRBs. At this 

time, provided that N, PRBs are present in one subframe 

and a maximum of N. LVRBs are available within the 

system, the base station can transmit bitmap information of 

N, bits to each terminal to notify the terminal through 

which one of the LVRBs downlink data will be transmitted or 

through which one of the LVRBs uplink data can be trans 

mitted. That is, each bit of the N-bit bitmap information, 

which is transmitted to each terminal as scheduling informa 

tion, indicates whether data will or can be transmitted through 

an LVRB corresponding to this bit, among the N. LVRBs. 

This scheme is disadvantageous in that, when the number 

N, becomes larger, the number of bits to be transmitted to 

each terminal becomes larger in proportion thereto. 

In the meantime, physical downlink control channel (PD 

CCH) downlink control information (DCI) transferred to a 

UE may have a plurality of formats. A resource allocation 

field transferred over the PDCCH may have different struc 

tures according to Downlink Control Information (DCI) for 

mats. Thus, the user equipment (UE) may interpret the 

resource allocation field according to a format of the received 

DCI. 

The resource allocation field may have two parts, i.e., resource block allocation information and a resource alloca 

tion header field. A plurality of resource allocation types may 

be defined. For example, according to a first resource alloca 

tion type, the resource block allocation information may have 

a bitmap indicating one set of consecutive physical resource 

blocks (PRBs). In this case, one bit may be allocated to one 

resource block group (RBG). According to a second resource 

allocation type, resource block allocation information may 

have a bitmap indicating subsets or RBs allocated to the UE. 

According to a third resource allocation type, resource block 

allocation information may have a bitmap indicating con 

secutively allocated VRBs. At this time, the resource alloca 

tion field may include a resource indication value (RIV) indi 

cating a start resource block and the length of consecutively 

allocated resource blocks (RBs). Examples of the above 

mentioned resource allocation types have been disclosed in 

the 3GPP TS 36.213 document. 

For example, a DCI format 1A prescribed in 3GPP TS 

36.213 may be used for compact scheduling of one physical 

downlink shared channel (PDSCH) codeword. This compact scheduling is a scheduling scheme for allocating one set of 

consecutive VRBs to a UE, and corresponds to the above third 

resource allocation type. Hereinafter, the above-mentioned 

compact scheduling in the present invention may be referred 

to as a compact scheme. 

As described above, provided that a terminal (i.e., the UE) 

may be assigned only one set of contiguous RBS, information 

of the assigned RBs may be represented by the compact 

scheme denoted by both a start point of RBs and the number 

of the RBS. 

FIG. 13 is a view illustrating an example of a method for 

allocating resource blocks by a compact scheme. If the num 

ber of available RBS is denoted by N. N., the length of 

available RBS varies depending on respective start points as 

shown in FIG. 13, such that the number of combinations for 

RB allocation is N-(N-a+1)/2. Accordingly, the num 

ber of bits required for the combinations is ceiling (log 

2(N (N+1)/2)). Here, ceiling(x) means rounding 

“X” up to the nearest integer. This method is advantageous 

over the bitmap scheme in that the number of bits does not 

significantly increase with the increase in the number N. 

On the other hand, for a method for notifying a UE of 

DVRB allocation, it is necessary to reserve the positions of 

respective divided parts of DVRBs distributively transmitted 

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14 

for a diversity gain. Alternatively, additional information may 

be required to directly notify the positions. Preferably, pro 

vided that the number of bits for signaling for the DVRBs is 

set to be equal to the number of bits in LVRB transmission of 

the above-stated compact scheme, it is possible to simplify a 

signaling bit format in a downlink. As a result, there are 

advantages that the same channel coding can be used, etc. 

Here, in the case where one UE is allocated a plurality of 

DVRBs, this UE is notified of a DVRB index of a start point 

of the DVRBs, a length (the number of the allocated 

DVRBs), and a relative position difference between divided 

parts of each DVRB (e.g., a gap between the divided parts). 

The LTE system is able to select either of Gap1 and Gap2. each of which has a predetermined value according to the 

number of system resource blocks. Accordingly, a value of 1 

bit may be separately allocated to indicate the selection of 

Gap 1 or 'Gap2. 

The following table 1 shows a structure of the Gap which 

can be used in the LTE system according to a system band 

width. In the case where the number of available system 

resource blocks (system RBs) is less than 50, only the Gap1 

(=1' is used, so that there is no need to allocate one bit for 

Gap indication. In contrast, in the case where the number of 

available system RBs is equal to or greater than 50, either one 

of 'Gap 1 (=1 Gap) and Gap2 (=2" Gap) must be used, so 

that signaling of 1 bit is needed to indicate which one of 

'Gap 1 (=1 Gap) and Gap2(=2" Gap) is used. 

TABLE 1 

Gap (N 

System BW 1 Gap 2d Gap 

(NP) (Ngae. ) (Ngae, 2) 

6-10 NP/2 NA 

11 4 NA 

12-19 8 NA 

20-26 12 NA 

27-44 18 NA 

45-49 27 NA 

SO-63 27 9 

64-79 32 16 

8O-110 48 16 

FIG.14 illustrates an example of a method for mapping two 

DVRBs having consecutive indexes to a plurality of contigu 

OuS PRBS. 

As shown in FIG. 14, in the case where a plurality of 

DVRBs having consecutive indexes are mapped to a plurality 

of contiguous PRBs, first divided parts 1401 and 1402 and 

second divided parts 1403 and 1404 are spaced apart from 

each other by a gap 1405, while divided parts belonging to 

each of the upper divided parts and lower divided parts are 

contiguous to each other, so that the diversity order becomes 

2. In this case, frequency diversity can be obtained only by a 

gap. In FIG. 14, N,N-2. 

FIG.15 illustrates an example of a method for mapping two 

DVRBs having consecutive indexes to a plurality of spaced 

PRBS. 

In the method of FIG. 15, DVRB indexes are constructed as 

shown in FIG. 15. When mapping DVRBs to PRBs, consecu 

tive DVRB indexes may be distributed without being mapped 

to contiguous PRBs. For example, a DVRB index 0 and a 

DVRB index 1 are not arranged contiguous to each other. In 

other words, in FIG. 15, DVRB indexes are arranged in the 

order of 0, 8, 16, 4, 12, 20, ..., and this arrangement can be 

obtained by inputting the consecutive indexes to a block 

interleaver. In this case, it is possible to obtain distribution 

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within each of the divided parts 1501 and 1502, as well as 

distribution by a gap 1503. Therefore, when a UE is allocated 

two DVRBs as shown in FIG. 15, the diversity order increases 

to 4, resulting in an advantage that an additional diversity gain 

can be obtained. In FIG. 15, N,N-2. 

At this time, the value of the gap indicative of the relative 

position difference between the divided parts can be 

expressed in two ways. Firstly, the gap value can be expressed 

by a difference between DVRB indexes. Secondly, the gap 

value can be expressed by a difference between indexes of 

PRBs to which a DVRB is mapped. In the case of FIG. 15, 

Gap=1 in the first way, while Gap-3 in the second way. FIG. 

15 shows the latter case 1503. Meanwhile, if the total number 

of RBs of the system is changed, the DVRB index arrange 

ment may be changed accordingly. In this case, the use of the 

second way has the advantage of recognizing a physical dis 

tance between the divided parts. 

In order to perform signaling of DVRB allocation, the 

above-mentioned LVRB compact scheme may be used. That 

is, if the compact scheme is applied to DVRBs signaled for 

one UE, PRBs mapped to the DVRBs may be distributed in a 

physical frequency domain, but these DVRBs have consecu 

tive logical indexes in a virtual region (i.e., a logical region). 

In this case, a start point of consecutively-allocated RBS and 

length information of the RBs correspond to a start point of 

VRB indexes instead of PRB indexes and length information 

thereof, respectively. 

As described above, in the compact scheme, LVRB signal ing includes a start point of RBS and length information of the 

RBs. In order to perform the DVRB signaling, gap informa 

tion may be additionally required in some cases. In order to 

constantly maintain the number of bits required for the entire 

signaling, there is a need to limit the length information Such 

that an amount of information must be reduced. For example, 

when using 50 RBs or more, one bit of the RIV field must be 

assigned for Gap indication, Such that there is a need to 

reduce the number of bits required for transferring the RIV 

with the limitation in the length information. 

On the other hand, in case of using RBs to perform the 

common signaling for several users, control signaling for 

notifying allocated RBs must allow all users present in a cell 

to read information of the allocated RBs. Thus, for this con 

trol signaling, a code rate may be reduced or a transmission 

power may be increased. Such that the resultant control sig naling information having a low code rate and a high trans 

mission power may be transferred to several users. In order to 

reduce the code rate of the control signaling to which limited 

resources are allocated, an amount of control data must be 

reduced. In order to reduce the amount of control data, the 

number of bits required for RB allocation information must 

be reduced. 

Likewise, control message data transferred to allocated 

RBs must allow all users present in the cell to read corre 

sponding information, such that the control message data is 

transferred at a low code rate. Assuming that the code rate is 

1/20, if an amount of data increases by 16 bits, an amount of 

codeword made after channel coding increases by 320 bits. In 

the Long Term Evolution (LTE), assuming that one TX 

antenna transmission (i.e., 1 TX antenna transmission) is car 

ried out and one OFDM symbol is used for a control signal, the number of symbols capable of transferring payload data 

within one RB (i.e., 1 RB) is 148. Thus, assuming that a 

quadrature phase shift keying (QPSK) modulation is used, the 

number of transferable bits is 296. As a result, data increases 

by 16 bits, and data increases by 320 bits, such that two RBs 

are additionally needed. 

5 

10 

15 

25 

30 

35 

40 

45 

50 

55 

60 

65 

16 

That is, in order to maintain a low code rate, although the 

size of data increases slightly, the number of RBs required for 

transferring this data greatly increases, such that RBS need to 

be allocated with a granularity of one RB unit (i.e., a 1 RB 

based granularity). 

Hereinafter, a resource allocation signaling structure for 

establishing a step for limiting a start position with a granu 

larity of one-RB allocation (i.e., 1 RB allocation) will be 

described in detail. 

The following equation 1 shows an exemplary signaling 

method based on the compact scheme which notifies of a start 

point (S) of RBs and the number (=Length, L) of allocated 

RBS. 

Equation 1 

if L-1s N/2 then 

else 

End 

Required bits 

Nbit required logo (RIV+1) 

Without limitation 

RIV-NR(N+1)/2-1 

With limitation L" 

RIP, L inity in{Nea (Na+1)/2-1.Nea (L"-1)+Non 

In the following description, "mod(x,y) means "X mody’. 

and “mod” means a modulo operation. Also, “L” means a 

descending operation, and represents a largest one of integers 

equal to or smaller than a numeral indicated in “L”. On the 

other hand, “” means an ascending operation, and repre 

sents a smallest one of integers equal to or larger than a 

numeral indicated in “”. Also, “round()” represents an 

integer nearest to a numeral indicated in “()'. “min(x,y) 

represents a smaller value selected between X and y, whereas 

“max(x,y) represents a larger value selected between X and 

y. 

Assuming that the total number of available RBs is denoted 

by N. and the beginning number of indexes to be assigned to 

the RBs is set to 0, indexes from 0 to N-1 are sequentially 

assigned to the RBS. In this case, N may be the total number 

of all RBs contained in a system band, the number of all RBs 

used as VRBs, or the number of RBs contained in any limited aca. 

Thus, the range of S may be 0s.SsN-1, and the range of 

allocable L values is changed according to this S value. In 

another view, the L value is in the range of 1s sn, and the 

range of available S values is changed according to the L 

value. Namely, a certain S value is unable to be combined 

with a specific L value. 

A maximum value of each of the S and L values may be 

represented by a binary number irrespective of Such impos 

sible combinations. A bit field for this binary number may be 

constructed for each of the S and L values. In case of trans 

mitting each of the bit fields, if N is 20 (i.e., N=20), 20 is 

less than 2 (i.e., 20<2), so that 5 bits for the Svalue and 5 bits 

for the L values, namely, a total of 10 bits, are needed. How 

ever, these 10 bits include information of useless combina 

tions incapable of being actually generated, such that over 

head of unnecessary transmission bits is generated. Thus, the 

number of transmission bits can be reduced if each combina 

tion of generable S and L values is represented by RIV, this 

Case 1:20-cv-22051-JEM Document 1-28 Entered on FLSD Docket 05/15/2020 Page 31 of 37
US 8,971,279 B2 

17 

RIV is converted into a binary number according to binary representation, and the resultant RIV of the binary number is 

then transferred. 

FIG. 16 is a view illustrating an example of RIVs when 

No. 20. 

As can be seen from FIG.16, RIV is decided according to 

S and L values. In case of calculating RIV related to 

0sSsN-1 in each of all L values using Equation 1, RIVs of 

FIG.16 are formed. The value of each element shown in FIG. 

16 is RIV indicating a combination of S and L values cor 

responding to the above element. Values contained in a left 

upper part covering almost half of FIG. 16 correspond to 

combinations of generable S and L values if N 20, and 

values contained in a right lower part colored in gray, cover 

ing the other half of FIG.16, correspond to combinations of S 

and L values incapable of being generated. 

In this scheme, RIV's present in the gray-colored part under 

the condition of L-1sLN/2. are mapped to RIVs under the 

other condition of L-1sLN/2. Such that no RIVs are 

wasted. For example, if N is set to 20 (i.e., N=20), RIVs 

present in a specific part corresponding to L-LN/2+1=20/ 

2+1=11 among the right lower part of FIG. 12 are reused in 

another part corresponding to L>LN/2+1=20/2+1=11 

among the left upper part of FIG. 20. In this case, a maximum 

value (i.e., a maximum RIV) among RIVs present in the left 

upper end is 209. 

In this scheme, the maximum RIV may influence the num 

ber of transmission bits, RIVs below the maximum RIV may 

not be mapped to values incapable of being obtained by 

combinations of actual S and L values. That is, all values 

below the maximum RIV correspond to combinations of 

generable S and L values. 

In case of separately transmitting the S value, a maximum 

S value is 19, such that 5 bits are needed to indicate this S 

value 19 (where 0<19<2). In case of separately transmit 

ting the L value, a maximum L value is 20, Such that 5 bits are 

needed to indicate this L value 20 (where 0<20<2). There 

fore, in case of transmitting the Sand L values independent of 

each other, 10 bits are needed in the end. However, the RIVs 

are in the range of 0sRIVs209<2, such that 8 bits are needed 

to indicate these RIVs, as denoted by N. 8. As a 

result, it can be recognized that 2 bits are saved as compared 

to the above case of transmitting the S and L values indepen 

dent of each other. In this case, a valid RIV is 209 and a 

maximum value capable of being indicated by 8 bits is 255, so 

that a total of 46 values of 210 - 255 are not actually used. 

When using the conventional RIV table shown in FIG. 16, 

RIVs undefined in this RIV table become invalid for an LTE 

terminal. For example, RIVs from 210 to 255 in FIG. 16 

become invalid for a conventional LTE terminal. Therefore, 

RIVs defined in the conventional RIV table are referred to as 

valid RIVs, and other RIVs undefined in this RIV table are 

referred to as invalid RIVs. For example, in FIG. 16, RIVs 

from 0 to 209 are valid RIVs, and RIVs from 210 to 255 are 

invalid RIVs. 

Valid RIVs are able to indicate only allocation status infor 

mation of RBs defined in the table of FIG. 16, and invalid 

RIVs are able to indicate allocation status information of 

other RBs undefined in the table of FIG. 16. In order to use 

invalid RIVs as described above, the assumption of the pres 

ence of invalid RIVs is needed. If the following equation 2 is 

satisfied, this means that RIVs that are not used as actual 

values while being capable of being transferred are always 

present. 

Equation 2 

NzM, where, N-log2(N(N+1)/2), M-log2(N 

(N+1)/2) 

5 

10 

15 

25 

30 

35 

40 

45 

50 

55 

60 

65 

18 

In Equation 2, 

NRB (NRB + 1) 

2 

is a total number of valid RIVs when the number of resource 

blocks is N. In Equation, N is a minimum length of a binary 

number for indicating all the valid RIVs. However, if 

NRB (NRB + 1) 

2 

is not a multiple of 2, it is impossible for M to be an integer, 

so that M may be set to any non-integer value. In this case, in 

order to accomplish Equation 2, the following equation 3 

must be achieved. 

NRB (NRB + 1) 

2 

2N + Equation tion 3 3 

Equation 3 can be represented by the following equation 4. 

Equation 4 

2'z Nr. Na+1) 

In conclusion, if Equation 4 is accomplished, it can be seen 

that the aforementioned invalid RIVs exist. 

Assuming that 2'-Na (Na+1) is achieved. (No 2") and (Na+1=2') must be established. That is, 2+1=2' must 

be satisfied. In this case, in order to satisfy 2"+1=2', 'a must 

be set to 0 (a=0) and b must be set to 1 (b=1). Therefore, 2'-N(N+1) is achieved only in the case of No. 1. 

However, because 6sNas110 is given in the LTE,2'z.N. (Na+1) is achieved. Thus, in the LTE,2'-Na (Na+1) is 

not achieved. Therefore, N=|log, (N'(N'+1)/2) |zM-log (N'(N'--1)/2) is demonstrated, and the 

LTE always includes RIVs that are not used as actual values 

while being capable of being transmitted. Therefore, the 

above-mentioned proposed method can be used for the LTE at 

all times. 

In the meantime, in the above-mentioned RIV construction 

method, if a maximum value (-L") of allocable RBs is 

limited, i.e., if the L value is limited to L" or less, the 

number of required bits may be reduced. In FIG. 12, if L" 

is set to 6 (i.e., L"-6), the range of generable L values is 

given as 1s is 6, combinations having other L values having 

the range of 7sLs.20 are not in use. At this time, it can be 

recognized that a maximum RIV among RIVs is 114. That is, the range of generable RIVs is given as 0<RIVs 114<27, so 

that the number of required bits is 7 as denoted by 

N. -7. In this case, a valid maximum RIV is 114 

and a maximum value capable of being denoted by 7 bits is 

127, such that a total of 13 values from 115 to 127 are not 

actually used. 

The SPS method among various scheduling methods used 

in the LTE system will hereinafter be described in detail. 

Presently, in order to perform uplink SPS and/or downlink 

SPS, the LTE system firstly informs a UE of radio resource 

control (RRC) signaling information, such that the UE can 

recognize which subframe(s) will be used for SPS transmis 

sion/reception on the basis of the received RRC signaling 

information. In other words, time resources from among time-frequency resources allocated for SPS is firstly desig 

nated through RRC signaling. In order to indicate available 

Case 1:20-cv-22051-JEM Document 1-28 Entered on FLSD Docket 05/15/2020 Page 32 of 37
US 8,971,279 B2 

19 

subframes, for example, a period and offset of each subframe 

can be notified. However, because a UE is still assigned only 

the time resource domain through the RRC signaling, the UE 

cannot not transmit/receive data using the SPS. Therefore, the 

UE receives a PDCCH for indicating activation, and then 

allocates frequency resources according to RB allocation 

information included in the received PDCCH, and applies the 

modulation and the code rate depending on modulation and 

coding scheme (MCS) information, such that the UE starts 

transmitting/receiving data according to period and offset 

information of subframes allocated through the RRC signal ing. Then, upon receiving a PDCCH for indicating deactiva 

tion from a base station (BS), the UE stops transmitting/ 

receiving data. In the case where the UE receives a PDCCH 

indicating either the activation or the deactivation after stop ping transmitting/receiving data, the UE restarts data trans 

mission/reception using the period- and offset-information of 

each subframe allocated through the RRC signaling using the 

RB allocation and MCS information designated in the 

received PDCCH. In this case, the PDCCH including the 

activation-, deactivation-, and/or reactivation indication(s) 

may be a PDCCH from which an SPS cell radio network 

temporary identity (C-RNTI) is detected. In other words, 

while allocation of time resources is carried out through the 

RRC signaling, transmission/reception of actual signals can 

be carried out after a PDCCH indicating activation and reac 

tivation of the SPS has been received. Interruption of signal transmission/reception occurs after the UE receives a 

PDCCH indicating SPS deactivation. 

Presently, a variety of formats have been defined as 

PDCCH formats in the LTE system, for example, a format 0 

for uplink, and formats 1, 1A, 1B, 1C, 1D,2,2A, 3, and 3A for 

downlink have been defined as PDCCH formats in the LTE 

system. Necessary control information may be selected from 

among a variety of control information according to usages of 

the above PDCCH formats, and a combination of the selected 

control information is formed. Such that the necessary control 

information can be transmitted in the form of such a combi 

nation. For example, necessary control information may be 

selected from among hopping flag, RB allocation, MCS. 

Redundancy Version (RV), New Data Indicator (NDI). Trans 

mission Power Control (TPC), a Cyclic Shift, Demodulation 

Reference Signal (DM RS), UL index, a Channel Quality Indicator (CQI) request, a DL allocation index, a Hybrid Automatic Repeat Request (HARQ) process number, a 

Transmitted Precoding Matrix Indicator (TPMI), and PMI 

confirmation. 

SPS Activation and Reactivation 

Basic information such as NDI, RBallocation, MCS infor 

mation, and the like is needed for SPS activation or SPS 

reactivation. Each PDCCH format includes unnecessary 

information in addition to the basic information. In case of 

SPS deactivation, NDI, RBallocation, MCS information and 

the like are no longer required, and only the deactivation 

status information is required for the SPS deactivation. 

SPS allocation and non-persistent allocation can be distin 

guished from each other according to whethera radio network 

temporary identity (RNTI) masked on a cyclic redundancy 

check (CRC) part of a PDCCH is an SPS C-RNTI or a 

C-RNTI. However, according to the present invention, when 

an SPS-based operation is performed, each of unnecessary 

bits among PDCCH formats is fixed to Zero O', such that this 

bit composed of 0 may be used to re-confirm SPS allocation 

information. 

Detailed bit field structures of individual PDCCH formats 

during the SPS operation according to the present invention 

can be given as the following tables 2 to 5. 

5 

10 

15 

25 

30 

35 

40 

45 

50 

55 

60 

65 

20 

TABLE 2 

Format 01A 1 bit-> Format O 

indicator O 

Hopping Flag 1 bit Resource Block N bit 

Allocation 

MCS 5 bits -> First MSBO: SPS Walidation 

Oxxxx 

NDI 1 bit 

DM-RS 3 bits -> 000 -> SPS Walidation 

OOO 

TPC (PUSCH) 2 bits -> *00 -> SPS Walidation “OO 

1 bit 

(2 bits) 

CQI trigger 

UL index (TDD) 

Table 2 shows the format 0 for uplink, if it is assumed that 

all or some of the MCS, DM-RS, and TPC bit fields are set to 

Zero '0' as shown in Table 2, the UE is able to confirm that the 

SPSC-RNTI is masked on the CRC part of a PDCCH, i.e., the 

UE is able to confirm SPS validation. 

TABLE 3 

Format 01A 1 bit-> Format 1A 

indicator 1. 

LVRB/DVRB Flag 1 bit Resource Block N bit 

Allocation 

MCS 5 bits -> First MSBO: SPS Walidation 

Oxxxx 

NDI 1 bit 

HARQ index 3 bits -> 000 -> SPS Walidation OOO 

TPC (PUCCH) 2 bits RV 2 bits -> *00 -> SPS Walidation 

“OO 

DL index (TDD) (2 bits) 

Table 3 shows the format 1A for a Single Input Multi 

Output (SIMO) downlink compact scheme. As shown in 

Table 3, if it is assumed that all or some of the MCS. HARQ index, and RV bit fields are set to zero '0' as shown in Table3, 

the UE is able to confirm that the SPS C-RNTI is masked on 

the CRC part of a PDCCH. 

TABLE 4 

Allocation type 1 bit 

Flag 

Resource Block P bit 

Allocation 

MCS 5 bits -> First MSBO: SPS Walidation 

Oxxxx 

HARQ index 3 bits (4-bit *000(0) -> SPS Validation 

TDD) -> 

*000(O) NDI 1 bit 

RV 2 bits -> *00 -> SPS Walidation 

“OO 

TPC (PUCCH) 2 bits 

DL index (TDD) 2 bits 

Table 4 shows the format 1 for a Single Input Multi Output 

(SIMO) downlink scheme. As shown in Table 4, if it is 

assumed that all or some of the MCS. HARQ index, and RV 

bit fields are set to zero '0' as shown in Table 4, the UE is able 

to confirm that the SPS C-RNTI is masked on the CRC part of a PDCCH. 

TABLE 5 

Allocation type 1 bit 

Flag 

Resource Block 

Allocation 

P bits 

Case 1:20-cv-22051-JEM Document 1-28 Entered on FLSD Docket 05/15/2020 Page 33 of 37
US 8,971,279 B2 

21 

TABLE 5-continued 

TPC (PUCCH) 2 bits 

DL index (TDD) 2 bits 

HARQ index 3 bits (4-bit *000(0) -> SPS Validation 

TDD) -> 

*000(O) 

HARQ swap flag 1 bit MCS 1 5 bits -> First MSBO: SPS Walidation 

Oxxxx 

NDI1 1 bit 

RV1 2 bits -> 00-> SPS Walidation 

“OO 

MCS 2 5 bits -> First MSBO: SPS Walidation 

Oxxxx 

NDI2 1 bit 

RV 2 2 bits -> 00-> SPS Walidation 

“OO 

Precoding 3 or 6 bits 

Table 5 shows the format 2/2A for a closed-loop/open 

loop Spatial Multiplexing (SM). As shown in Table 5, if it is 

assumed that all or some of the MCS. HARQ index, and RV 

bit fields are set to zero '0' as shown in Table 5, the UE is able 

to confirm that the SPS C-RNTI is masked on the CRC part of a PDCCH. 

SPS Deactivation 

The SPS deactivation method according to the present 

invention will hereinafter be described in detail. 

The compact resource allocation method is used in the 

formats 0, 1A, 1B, 1C, and 1D among the above-mentioned 

PDCCH formats. In this case, when some of RIVs are valid 

RIVs and the other RIVs are invalid RIVs, the invalid RIVs 

may be used for an event requesting no RB allocation. 

In the present invention, when a downlink control signal 

format based on the compact-type RB allocation Scheme is 

used for signaling SPS activation and/or SPS deactivation, an 

RIV contained in the PDCCH from which the SPS C-RNTI is 

detected may be used as signaling information for SPS deac 

tivation indication. In this case, the RIV contained in the 

PDCCH from which the SPS C-RNTI is detected may have 

any one of values capable of being used as the above-men 

tioned invalid RIVs. 

For example, according to the RIV construction method 

shown in Table 1, a valid RIV indicating a generable RB 

allocation combination may be any one of RIVs from 0 to 209 

(where this RIV 209 is a maximum valid RIV). In this case, 

an invalid RIV may be any one of RIVs from 210 to 255. If the 

RIV detected from the PDCCH from which the SPS C-RNTI 

is detected belongs to the invalid RIV, the UE recognizes that 

signaling information indicating SPS deactivation is trans 

mitted. A maximum value capable of being indicated by a 

binary field indicating each RIV is certainly included in val 

ues capable of belonging to the invalid RIV. That is, the 

above-mentioned invalid RIV certainly includes a specific value acquired when the entire binary field indicating each 

RIV is filled with 1. Specifically, in the case where the RIV 

detected in the PDCCH from which the SPS C-RNTI was 

detected is determined to be the above specific value acquired 

when the entirety of the binary field is filled with 1, it can be 

recognized that signaling information indicating SPS deacti 

vation is transmitted on the basis of the above specific value. 

FIG. 17 shows an exemplary structure of a PDCCH field 

for signaling SPS deactivation according to the present inven 

tion. As shown in FIG. 17, if the RIVbinary field is composed 

of 8 bits, a binary number RIV (=11111111) is acquired. If 

the RIV (=11111111) is detected, this RIV (=11111111) 

may indicate that signaling information indicating SPS deac 

tivation was transmitted. 

10 

15 

25 

30 

35 

40 

45 

50 

55 

60 

65 

22 

A method for indicating SPS deactivation when DVRB 

allocation is carried out in a PDCCH having a DCI format 1A 

will hereinafter be described in detail. 

FIG. 18 shows individual fields acquired when DVRB 

allocation is carried out in a PDCCH having a DCI format 1A 

according to the present invention. FIG. 18(a) shows an 

exemplary case in which an LVRB is used. FIGS. 18(b) and 

18(c) illustrate exemplary cases, each of which shows the use 

of a DVRB. In more detail, FIG. 18(b) shows the use of 

Gap1 and FIG. 18(c) shows the use of Gap2. 

When using a DVRB as shown in FIGS. 18(b) and 18(c), 

one bit 1802 from among the entire bits 1801 used as an RIV 

field indicating LVRB allocation information as shown in 

FIG. 18(a) is used for indicating Gap 1/Gap2. Only the 

remaining bit field 1803 is allocated as an RIV field. In this 

case, as shown in FIG. 18, the maximum allocable number of 

RBs is limited to 16 so that the RIV does not exceed the 

maximum value which can be represented by the RIV field 

which is reduced by the one bit 1802. 

At least one invalid RIV unused for allocating valid 

resources exists, and this invalid RIV may be used as signal ing information indicating SPS deactivation. Specifically, if 

the invalid RIV exists, the maximum value capable of being indicated by the binary field indicating an RIV is included in 

the existing invalid RIV, so that this maximum value can be 

used for deactivation. In other words, the value acquired when 

the entirety of the RIV binary field is filled with 1 may be 

used for deactivation. As can be seen from FIG. 18, there may arise two cases according to indication 1802 of the Gap. The 

SPS deactivation construction having Gap2 shown in FIG. 

18(c) has the same bit pattern as that of FIG. 18(a) in which 

the RIV field for LVRB is configured to indicate the SPS 

deactivation. 

In addition, in case of the SPS deactivation, a distinction 

between Gap1 and Gap2 and a distinction between LVRBs 

and DVRBs are meaningless. Therefore, even for a SPSUE 

which is using Gap 1 shown in FIG. 18(b), the entire RIV 

field for LVRB can be filled out with 1 in order to represent 

SPS deactivation. In other words, although Gap1 is cur 

rently used as shown in FIG. 18(b), the Gap indication field 

1802 may be filled with 1 instead of “0” under the SPS 

deactivation. 

Hereinafter, a method for indicating SPS deactivation 

when hopping is used for the PDCCH having the DCI format 

0 according to the present invention will hereinafter be 

described. 

FIG. 19 shows individual fields of a PDCCH having a DCI 

format 0 according to the present invention. FIG. 190a) 

shows an exemplary case in which the hopping is not used. 

FIGS. 190b) and 190c) show other cases in which the hopping is used when a system band is in the range from 50 RBs to 110 

RBS. 

In the case where the system band is in the range from 50 

RBs to 110 RBs as shown in FIGS. 19(b) and 19(c) and 

hopping is carried out, 2 bits 1902 from among all bits 1901 

used as an RIV field indicating VRB allocation information 

are used to indicate hopping information. Only the remaining 

bits 1903 are allocated as an RIV field. If it is assumed that the 

hopping is carried out in the format 0 and the system band 

width is in the range from 6 RBs to 49 RBs, one bit (1 bit) from 

among all bits used as the VRB RIV field is used to indicate 

the hopping information. 

For example, as shown in FIGS. 190b) and 19(c), the length 

of RBs capable of being maximally allocated is limited, such 

that an RIV does not exceed a maximum value capable of 

being indicated by the RIV field 1903. Even in the case, there 

exists at least one invalid RIV to be unused, and this invalid 

Case 1:20-cv-22051-JEM Document 1-28 Entered on FLSD Docket 05/15/2020 Page 34 of 37
US 8,971,279 B2 

23 

RIV may be used for SPS deactivation. The invalid RIV 

includes the maximum value capable of being indicated by a 

binary field through which the RIV will be transferred, such 

that this maximum value can be used for deactivation. There 

may arise two cases according to the hopping information as 

shown in FIG. 19. The SPS deactivation construction formed 

when each bit indicating the hopping information is set to 1 

as shown in FIG. 190c) has the same bit pattern as that of FIG. 

19(a)in which the RIV field for VRB is configured to indicate 

the SPS deactivation. 

In addition, as described above, the distinction based on 

hopping information is meaningless for the SPS deactivation. 

Therefore, even when a hopping is performed as like in FIG. 

19(b) or 19(c), the entire RIV field 1901 can be filled with 1 

to indicate SPS deactivation. 

As described above, because it is enough to inform only the 

deactivation status without other control information to indi 

cate a SPS deactivation, it is preferable that only one format 

be used for each of uplink and downlink. In other words, the 

format 0 may be used in uplink and the shortest format 1A 

may be used in downlink. 

Tables 6 and 7 show examples of detailed field structures 

used when uplink SPS deactivation and downlink SPS deac 

tivation are signaled by DCI format 0 and DCI format 1A, respectively. 

TABLE 6 

Format 01A 1 bit-> Format O 

indicator O 

Hopping Flag 1 bit-> 

x 

Resource Block N bit- SPS deactivation 

Allocation 11... 11 

MCS 5 bits -> First MSBO: SPS Walidation 

Oxxxx 

NDI 1 bit-> 

x 

DM-RS 3 bits -> 000 -> SPS Walidation 

OOO 

TPC (PUSCH) 2 bits -> 00 -> SPS Walidation “OO 

CQI trigger 1 bit-> 

x 

UL index (TDD) (2 bits) -> 

Table 6 shows a PDCCH having a DCI format 0 for 

uplink. When a UE confirms that the SPS C-RNTI is masked 

on a CRC part of the PDCCH and that allor some of the MCS, 

DM-RS, and TPC bit fields are set to Zero '0' as shown in 

Table 6, the UE is able to recognize that SPS is activated. In 

addition, a SPS deactivation can be signaled by setting the 

whole RIV field to 1 as described above. Because the bits in 

table 6, each of which is denoted by 'X', are irrelevant to SPS 

validation and SPS deactivation, an arbitrary value may be 

assigned to each of the bits. However, if all of the bits is fixed 

to “0” or 1, the UE may additionally confirm that the SPS is 

deactivated. 

TABLE 7 

Format 01A 1 bit-> Format 1A 

indicator 1. 

LVRB/DVRB Flag 1 bit-> 

x 

Resource Block N bit-e SPS deactivation 

Allocation 11... 11 

MCS 5 bits -> First MSBO: SPS Walidation 

Oxxxx 

NDI 1 bit-> 

x 

10 

15 

25 

30 

35 

40 

45 

50 

55 

60 

65 

24 

TABLE 7-continued 

HARQ index 3 bits -> 000 -> SPS Walidation OOO 

TPC (PUCCH) 2 bits -> x 

RV 2 bits -> *00 -> SPS Walidation 

“OO 

DL index (TDD) (2 bits) -> 

Table 7 shows a PDCCH having a DCI format 1A for 

downlink. When a UE confirms that the SPS C-RNTI is 

masked on a CRC part of the PDCCH and that all or some of 

the MCS, HARQ index, and RV bitfields are set to zero '0' as 

shown in Table 7, the UE is able to recognize that SPS is 

activated. In addition, the SPS deactivation can be signaled by 

setting the entire RIV field to 1 as described above. Because 

the bits in table 7, each of which is denoted by 'X', are 

irrelevant to either SPS validation or SPS deactivation, an 

arbitrary value may be assigned to each of the bits. However, 

if all of the bits is fixed to 0 or 1, the UE may additionally 

confirm that the SPS is deactivated. 

FIG.20 is a block diagram illustrating constituent elements 

of a device 50 applicable to the present invention. 

In FIG. 20, the device 50 may be a UE or a base station 

(BS). In addition, the above-mentioned methods can be 

implemented by this device 50. The device 50 includes a 

processor 51, a memory 52, a Radio Frequency (RF) unit 53, 

a display unit 54, and a user interface unit 55. Layers of the 

radio interface protocol are realized in the processor 51. The 

processor 51 provides a control plane and a user plane. Func 

tions of individual layers can be implemented in the processor 

51. The processor 51 may include a contention resolution 

timer. The memory 52 is connected to the processor 51 and 

stores an operating system, applications, and general files. If 

the device 50 is a UE, the display unit 54 displays various 

information, and may use well-known elements such as a 

Liquid Crystal Display (LCD), an Organic Light Emitting 

Diode (OLED), and the like. The user interface unit 55 may be 

constructed of a combination of well-known user interfaces 

such as a keypad, a touchscreen, and the like. The RF unit 53 

is connected to the processor 51 so that it can transmit and 

receive RF signals to and from the processor 51. 

Embodiment 1 

A method and apparatus for allowing the UE 50 shown in 

FIG. 20 to perform SPS deactivation according to a first 

embodiment of the present invention will hereinafter be 

described in detail. 

The first embodiment of the present invention relates to a 

method and apparatus for deactivating semi-persistent sched 

uling (SPS) by the UE 50 of FIG. 20. The processor 51 

contained in the UE 50 receives a downlink control channel 

from a base station (BS) through the RF unit 53. If the binary field indicating resource allocation information contained in 

the downlink control channel is entirely filled with 1, the 

processor 51 deactivates the SPS. 

Embodiment 2 

A method and apparatus for allowing the base station (BS) 

50 shown in FIG. 20 to transmit a signal for SPS deactivation 

according to a second embodiment of the present invention 

will hereinafter be described in detail. 

The second embodiment of the present invention relates to 

a method and apparatus for transmitting a signal for SPS 

deactivation by the base station (BS) 50 shown in FIG. 20. 

When performing the SPS deactivation, the processor 51 of 

the base station (BS) 50 fills the entire binary field indicating resource allocation information contained in a downlink con 

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US 8,971,279 B2 

25 

trol channel with the value of 1. Thereafter, the processor 51 

transmits the downlink control channel through the RF unit 

53. In this case, the binary field filled with the value of 1 

indicates SPS deactivation. 

It is apparent to those skilled in the art that the first embodi 

ment (Embodiment 1) and the second embodiment (Embodi 

ment 2) can be reconstructed as a method invention embodied 

by a combination of steps executed in the RF unit and the 

processor. 

Embodiment 3 

FIG.21 is a flowchart illustrating a method for deactivating 

a semi-persistent scheduling (SPS) according to the present 

invention. 

In order to perform SPS deactivation, a base station (BS) 

fills the entire binary field indicating resource allocation 

information contained in a downlink control channel with the 

value of 1 at step S2101. The base station (BS) transmits the 

downlink control channel to the UE at step S2102. The UE 

receives the downlink control channel from the base station 

(BS) at step S2103. When the entire binary field indicating resource allocation information contained in the downlink 

control channel is filled with 1, the UE performs the SPS 

deactivation. 

The first to third embodiments (Embodiment 1-Embodi 

ment 3) can be restricted as follows. The downlink control 

channel may be a PDCCH, and a Downlink Control Informa 

tion (DCI) format of the downlink control channel may be a 

Format 0 or a Format 1A. The wireless mobile communi 

cation system uses a scheduling method based on the compact 

scheme, and the binary field may be composed of a field 

indicating an RIV. Otherwise, the above-mentioned binary 

field may be composed of a field indicating an RIV and a field 

indicating Gap information used for distributed allocation 

of resources. For another example, the above-mentioned 

binary field may be composed of a field indicating an RIV and 

a field indicating hopping information. 

The present invention uses a Resource Indication Value 

(RIV) not mapped for RB allocation in a Physical Downlink 

Control Channel (PDCCH) so as to indicate an SPS deacti 

vation status, so that it can inform a UE of SPS deactivation 

without adding a bit field or a new format. 

Although the present invention has been disclosed by refer 

ring to the above-mentioned embodiments, it should be noted 

that the aforementioned embodiments have been disclosed 

only for illustrative purposes, and those skilled in the art will 

appreciate that various modifications, additions and Substitu 

tions are possible, without departing from the scope and spirit 

of the invention as disclosed in the accompanying claims. 

Thus, it is intended that the present invention covers the 

modifications and variations of this invention provided they 

come within the scope of the appended claims and their 

equivalents. Therefore, the present invention is not limited to 

the above-mentioned embodiments, but can be applied to 

other examples which can satisfy the above principles and 

new characteristics of the present invention. 

As apparent from the above description, the present inven 

tion is applicable to a transmitter and a receiver for use in a 

communication system. 

It will be apparent to those skilled in the art that various 

modifications and variations can be made in the present invention without departing from the spirit or scope of the 

invention. Thus, it is intended that the present invention cover 

the modifications and variations of this invention provided they come within the scope of the appended claims and their 

equivalents. 

5 

10 

15 

25 

30 

35 

40 

45 

50 

55 

60 

65 

26 

What is claimed is: 

1. A method for deactivating Semi-Persistent Scheduling 

(SPS) transmission in a wireless mobile communication sys 

tem, the method comprising: performing, by a User Equipment (UE), a SPS transmis 

sion at an interval of a subframe period configured by a 

radio resource control (RRC) signal; receiving, by the UE, a Physical Downlink Control Chan 

nel (PDCCH) signal with a Radio Network Temporary 

Identifier (RNTI), wherein the PDCCH signal includes a 

first field related to a resource allocation; and 

performing a procedure for deactivating the SPS transmis 

sion if the PDCCH signal satisfies conditions for SPS 

deactivation, 

wherein the conditions for SPS deactivation include: 

the RNTI is a SPS Cell RNTI (SPS C-RNTI); and 

the first field is entirely filled with 1. 

2. The method of claim 1, 

wherein the PDCCH signal further includes a second field 

related to Transmission Power Control (TPC) and a third 

field related to a DeModulation Reference Signal (DM 

RS), 

wherein the conditions for SPS deactivation further 

include: 

the second field is entirely filled with 0, and 

the third field is entirely filled with 1. 

3. The method of claim 1, wherein the PDCCH signal 

carries a Downlink Control Information (DCI) format 0. 

4. The method of claim 1, wherein the first field indicates a 

Resource Indication Value (RIV). 

5. The method of claim 1, further comprising: 

continuing, by the UE, the SPS transmission if the PDCCH 

signal does not satisfy the conditions for SPS deactiva 

tion. 

6. A method for deactivating Semi-Persistent Scheduling 

(SPS) reception in a wireless mobile communication system, the method comprising: performing, by a Base Station (BS), a SPS reception at an 

interval of a subframe period configured by a radio 

resource control (RRC) signal; transmitting, by the BS, a Physical Downlink Control 

Channel (PDCCH) signal with a Radio Network Tem 

porary Identifier (RNTI), wherein the PDCCH signal 

includes a first field related to a resource allocation; and 

performing a procedure for deactivating the SPS reception 

if the PDCCH signal satisfies conditions for SPS deac 

tivation, 

wherein the conditions for SPS deactivation include: 

the RNTI is a SPS Cell RNTI (SPS C-RNTI); and 

the first field is entirely filled with 1. 

7. The method of claim 6, 

wherein the PDCCH signal further includes a second field 

related to Transmission Power Control (TPC) and a third 

field related to a DeModulation Reference Signal (DM 

RS), 

wherein the conditions for SPS deactivation further 

include: 

the second field is entirely filled with 0, and 

the third field is entirely filled with 1. 

8. The method of claim 6, wherein the PDCCH signal 

carries a Downlink Control Information (DCI) format 0. 

9. The method of claim 6, wherein the first field indicates a 

Resource Indication Value (RIV). 

10. The method of claim 6, further comprising: continuing, by the BS, the SPS reception if the PDCCH 

signal does not satisfy the conditions for SPS deactiva 

tion. 

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US 8,971,279 B2 

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11. A User Equipment (UE) used for in a wireless mobile 

communication system, the UE configured to: 

perform a Semi-Persistent Scheduling (SPS) transmission 

at an interval of a subframe period configured by a radio 

resource control (RRC) signal; 

receive a Physical Downlink Control Channel (PDCCH) 

signal with a Radio Network Temporary Identifier 

(RNTI), wherein the PDCCH signal includes a first field 

related to a resource allocation; and 

performing a procedure for deactivating the SPS transmis 

sion if the PDCCH signal satisfies conditions for SPS 

deactivation, 

wherein the conditions for SPS deactivation include: 

the RNTI is a SPS Cell RNTI (SPS C-RNTI); and 

the first field is entirely filled with 1. 

12. The UE of claim 11, wherein the PDCCH signal further 

includes a second field related to Transmission Power Control 

(TPC) and a third field related to a DeModulation Reference 

Signal (DMRS), 

wherein the conditions for SPS deactivation further 

include: 

the second field is entirely filled with 0, and 

the third field is entirely filled with 1. 

13. The UE of claim 11, wherein the PDCCH signal carries 

a Downlink Control Information (DCI) format 0. 

14. The UE of claim 11, wherein the first field indicates a 

Resource Indication Value (RIV). 

15. The UE of claim 11, wherein the UE is further config 

ured to continue the SPS transmission if the PDCCH signal 

does not satisfy the conditions for SPS deactivation. 

5 

10 

15 

25 

28 

16. A Base Station (BS) used for in wireless mobile com 

munication system, the BS configured to: 

perform a SPS reception at an interval of a subframe period 

configured by a radio resource control (RRC) signal; 

transmit a Physical Downlink Control Channel (PDCCH) 

signal with a Radio Network Temporary Identifier 

(RNTI), wherein the PDCCH signal includes a first field 

related to a resource allocation; and 

perform a procedure for deactivating the SPS reception if 

the PDCCH signal satisfies conditions for SPS deacti 

Vation, 

wherein the conditions for SPS deactivation include: 

the RNTI is a SPS Cell RNTI (SPS C-RNTI); and 

the first field is entirely filled with 1. 

17. The BS of claim 16, wherein the PDCCH signal further 

includes a second field related to Transmission Power Control 

(TPC) and a third field related to a DeModulation Reference 

Signal (DMRS), 

wherein the conditions for SPS deactivation further 

include: 

the second field is entirely filled with 0, and 

the third field is entirely filled with 1. 

18. The BS of claim 16, wherein the PDCCH signal carries 

a Downlink Control Information (DCI) format 0. 

19. The BS of claim 16, wherein the first field indicates a 

Resource Indication Value (RIV). 

20. The BS of claim 16, wherein the BS is further config ured to continue the SPS reception if the PDCCH signal does 

not satisfy the conditions for SPS deactivation. k k k k k 

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