KOREAN INTELLECTUAL PROPERTY OFFICE
`
`[stamp: CERTIFIED COPY OF PRIORITY DOCUMENT]
`
`I hereby certify that the attached copy is true to the original copy of the below application.
`
`Application Number:
`
`Patent application 2001 no. 57600
`PATENT-2001-0057600
`
`Date of Application:
`
`September 18, 2001
`
`Applicant(s):
`
`LG ELECTRONICS INC.
`
`February 9, 2002
`
`Commissioner of the Korean Intellectual Property
`Office
`
`COMMISSIONER
`[seal: Commissioner of the Korean Intellectual Property Office]
`
`Ex. 1015 - Sierra Wireless, Inc.
`Sierra Wireless, Inc., et al. v. Sisvel S.P.A., IPR2021-01141
`Page 1 of 21
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`[Name of document]
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`[Reference number]
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`[Title of the invention]
`[Title of the invention in English]
`[Applicant]
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` [Applicant code]
`[Agent]
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`[Agent]
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`[Inventor]
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` [Nationality]
`[Inventor]
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`
`
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`
`
`
`
` [Bibliographic details]
`Patent application form
`Patent
`Commissioner of the Korean Intellectual Property
`Office
`0002
`September 18, 2001
`H04B
`Reverse link data rate control method
`Method for controlling data rate in reverse link
`
`LG Electronics Inc.
`1-1998-000275-8
`
`KIM, Yong-In
`9-1998-000022-1
`2000-005155-0
`
`SHIM, Chang-Seob
`9-1998-000279-9
`2000-005154-2
`
`KIM, Ki-Jun
`KIM, Ki Jun
`680704-1405717
`137-070
`101-1202, 1533 Seocho Hanshin Apartments, Seocho-
`dong, Seocho-gu, Seoul
`KR
`
`KIM, Young Cho
`KIM, Young Cho
`730803-1047822
`138-170
`
`Ex. 1015 - Sierra Wireless, Inc.
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`Page 2 of 21
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` [Address]
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`[Fees]
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` [Total]
`[Attached documents]
`
`
`
`
`
`#1302 Gyeongnam Lake Park, 32-1 Songpa-dong,
`Songpa-gu, Seoul
`KR
`I hereby apply as described above according to the
`provisions of Article 42 of the Patent Act. Agent
`KIM, Yong-in (seal) Agent
`SHIM, Chang-Seob (seal)
`
`29,000 won
`page(s)
`20
` 7,000 won
`page(s)
`7
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`won
`case(s)
`
`0
`claims(s) 0
`won
`0
`36,000 won
`1. Abstract and Specification (figures)_1 copy
`
`Ex. 1015 - Sierra Wireless, Inc.
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`[Abstract]
`
`[Abstract]
`The present invention pertains to a mobile communication system, and specifically pertains to a
`data rate control method in a reverse link. Such a reverse data rate control method according to the present
`invention comprises: a step of calculating transmission energy level required in a terminal, by applying cell
`interference probability of each terminal; a step of receiving data rate information for which transmission
`of each of the terminals is possible; and a step of generating data rate control information of each of the
`terminals according to the calculated transmission energy level and data rate information.
`
`[Representative figure]
`Fig. 2
`
`[Keywords]
`Cell interference probability, reception energy, total interference amount
`
`
`
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`[Specification]
`
`[Title of Invention]
`Reverse link data rate control method {Method for controlling data rate in reverse link}
`[Simple Explanation of Figures]
`Fig. 1 is a flowchart showing a data rate control procedure for the prior art.
`Fig. 2 is a flowchart showing an example of a dedicated rate control procedure for a terminal of a
`base station according to the present invention.
`Fig. 3 is a figure showing a renewal process of BS_RCV according to the present invention.
`Fig. 4 is a figure showing a rate control information generation procedure using BS_RCV according
`to the present invention.
`Fig. 5 is a flowchart showing another example of a dedicated rate control procedure for a terminal
`of a base station according to the present invention.
`[Detailed Explanation of Invention]
`[Technical Field of the Invention and Prior Art]
`<6>
`The present invention pertains to a mobile communication system, and specifically pertains to a
`data rate control method in a reverse link.
`<7>
`In general, reverse data transmission is closely related to the total interference amount (Rise Over
`Thermal: hereinafter abbreviated as “ROT”) that is received by a base station. Total interference amount
`received by the base station refers to the total signal power of all terminals that are received by a base
`terminal. This will be explained using Fig. 1 as an example.
`<8>
`Fig. 1 is a flowchart showing a data rate control procedure for the prior art.
`<9>
`If total interference amount received by a base station is low, a terminal can transmit by increasing
`the data rate of a reverse transmission, but if this is not the case, in other words, if the total interference
`amount is above a certain level, there are cases where the data rate must be reduced or data transmission
`must be discontinued.
`<10>
`In the case of 1x EV-DO (1x Evolution Data Only) systems, as depicted in Fig. 1, a base station
`estimates the total interference level in reverse (S10), generates commands for increasing or decreasing
`data rate, in other words, RA (Reverse Activity) bits, and transmits to all active terminals (S12). This RA
`command transmits data to all terminals within active sets transmitting data in reverse through a common
`channel referred to as an RA (Random Access) channel.
`<11> The base station compares the measured total interference amount received and the threshold (S11),
`and if the total interference amount received is high, in other words, if total signal power of all terminals is
`above a certain threshold, RA bits corresponding to a data rate reduction command are generated and
`transmitted to active terminals.
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`<12> However, if the total interference amount received is low, in other words, if the total signal power
`of terminals is less than a certain threshold, RA bits corresponding to a data rate increase command are
`generated and transmitted to active terminals.
`<13>
`In other words, all terminals receive increase command RA bits at the same time or receive decrease
`command RA bits at the same time.
`<14> These RA bits are transmitted during one frame from a base station to a terminal, and a
`corresponding terminal adjusts data rate of a next frame by using these RA bits (S14).
`<15> Prior to this adjustment, if a terminal receives RA bits, it performs a test for increasing or decreasing
`data rate (S13). In other words, the fact that a terminal receives increase or decrease command(s) does not
`necessarily mean the data rate must be increased or decreased.
`<16> Terminals, after receiving RA bits, independently test whether an increase or a decrease of data
`rate will be performed. If this test is passed, only then the corresponding terminal executes an increase or a
`decrease of data rate, and if this test is not passed, does not execute an increase or a decrease of data rate,
`and maintains the current data rate.
`<17> A terminal tests whether the data rate changes so that the probability of an increase in the data rate
`of the next frame is high while the probability of a decrease in the data rate is low when the data rate of the
`current reverse transmission frame is low, and that the probability of an increase in the data rate of the next
`frame is low while the probability of a decrease is high when, conversely, the data rate of the current reverse
`transmission frame is high.
`<18>
`In this manner, the prior art was made based only on the total interference amount that is received
`at a base station, without the RA bits considering the reception status of each user. Therefore, these RA bits
`were transmitted as the same increase or decrease command to all users.
`<19> Therefore, from the perspective of a terminal, since an increase or a decrease of data rate must be
`executed in a state where the conditions of its channel are not taken into consideration at all, there is a
`problem in which efficient data transmission cannot occur.
`<20>
`In conclusion, such problems cause the problem of degrading the data processing of the terminal.
`<21> From the perspective of a base station, even if a terminal receives RA bits corresponding to data
`rate increase or decrease commands, since it increases or decreases data rate only after performing an
`independent test, a problem arises where a base station cannot achieve an effect of a change in the total
`amount of interference at the degree predicted by the base station.
`[Technical Problem to Be Resolved by the Invention]
`<22> Therefore, the present invention has been devised in consideration of problems of the prior art
`mentioned above, and is for providing a reverse link data rate control method that makes it suitable to
`enhance the data throughput of a terminal.
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`<23>
`In addition, the present invention is for providing a reverse link data rate control method that makes
`it suitable to enhance the reception rate of a base station.
`<24> According to one characteristic of the present invention for achieving said object, it comprises: a
`step of calculating transmission energy level required in a terminal, by applying cell interference probability
`of each terminal; a step of receiving data rate information for which transmission of each of the terminals
`is possible; and a step of generating data rate control information of each of the terminals according to the
`calculated transmission energy level and data rate information.
`<25> Preferably, the cell interference probability is reported from each of the terminals or is
`independently calculated. At such time, the cell interference probability is reported regularly or upon
`channel environment change of each of the terminals. Specifically, the cell interference probability is found
`and reported by using pilot signal received from each base station, through a pilot signal measurement
`message (PSMM) and by using overall signal power received from this base station.
`<26> Preferably, the cell interference probability is calculated by using the largest channel gain in size
`among channel gains of a reverse link between any one of the terminals and a base station, and channel
`gains of a reverse link with a plurality of base stations including this base station.
`<27> Preferably, the cell interference probability is calculated by using the largest channel gain in size
`among channel gains of a forward link between any one of the terminals and a base station, and channel
`gains of a forward link with a plurality of base stations including this base station.
`<28> Preferably, the cell interference probability is calculated by using the largest signal power in size
`among the total sum of signal power received by any one terminal from base stations, and the signal power
`of the base stations.
`<29> Preferably, the cell interference probability is calculated by using the status value when a base
`station receives the forward link channel status value transmitted through the reverse link channel.
`<30> Preferably, it further comprises: a step of allocating and providing reception energy required for
`the data rate of a current transmission frame of each of the terminals; and a step of calculating the
`transmission energy level by applying the cell interference probability value to the reception energy for the
`current transmission frame data rate of each terminal. At this time, the transmission energy level is
`calculated by reducing certain parts of the cell interference probability value from the reception energy for
`a current transmission frame data rate of each of the terminals, and this certain ratio is adjusted to provide
`the minimum level of uniform data rate for each terminal.
`<31> Preferably, when a transmission power reserve of each of the terminals is more than or equal to the
`reference level, the bits to be transmitted to a transmission buffer are more than or equal to the reference
`level, and if the data rate currently being transmitted is less than or equal to the maximum data rate, the
`data rate information is set to “increase.”
`
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`<32> Preferably, when a maximum of two conditions are satisfied, among conditions in which a
`transmission power reserve of each other terminal is more than or equal to the reference level, if the bits to
`be transmitted to a transmission buffer are more than or equal to the reference level, and the data rate
`currently being transmitted is less than or equal to the maximum data rate, it is set to “maintain.”
`<33> According to another characteristic of the present invention for achieving said object, it comprises:
`a step of calculating transmission energy level required in a terminal, by applying cell interference
`probability of each terminal; a step of receiving data rate information for which transmission of each of the
`terminals is possible; a step of calculating total energy of signals that are received from each of the terminals
`every certain cycle; and a step of generating data rate control information of each of the terminals according
`to the total energy, the calculated transmission energy level, and the data rate information.
`<34> According to another characteristic of the present invention for achieving said object, it comprises:
`a step of calculating transmission energy level required in a terminal, by applying cell interference
`probability of each terminal; a step of receiving data rate information for which transmission of each of the
`terminals is possible; a step of calculating total energy of signals that are received from each of the terminals
`every certain cycle; a step of renewing reference data rate value according to the calculated total energy;
`and a step of generating data rate control information of each of the terminals according to the total energy,
`the reference data rate value, the calculated transmission energy level, and the data rate information.
`<35> Preferably, the reference data rate value sets the lowest value among the transmission energy levels
`required in each terminal as the initial value.
`<36> According to another characteristic of the present invention for achieving said object, it comprises:
`a step of calculating data rate information for which transmission by each terminal is possible, and reporting
`to base stations within active sets; a step of calculating transmission energy level required in terminals by
`applying cell interference probability of each of the cells; a step of calculating total energy of signals that
`are received from each of the terminals for every certain cycle; a step of renewing reference data rate value
`according to the calculated total energy; a step of generating data rate control information of each of the
`terminals according to the total energy, the reference data rate value, the calculated transmission energy
`level, and the data rate information; a step of receiving the generated data rate control information from the
`base stations; and a step of adjusting the rate of data to be transmitted by combining the data rate control
`information.
`[Configuration and Application of the Invention]
`<37> Hereinafter, the configuration and application according to a preferred embodiment of the present
`invention will be described with reference to the accompanying figures.
`<38> The present invention proposes a method of allowing a base station to control reverse data rate of
`each terminal, on a dedicated basis in each terminal, in consideration of channel status of each terminal,
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`effective data rate for which transmission of a current frame is possible, and total interference amount (ROT)
`that is received by a base station. To achieve this, the following parameters must be defined between a base
`station and a terminal.
`<39> 1) MS_PRI (MS priority)
`<40> The MS_PRI is a parameter for measuring cell interference probability of each terminal and is
`calculated by using Equation 1 below. This value is a value that is independently calculated in a base station,
`or a value that is reported from a terminal to a base station regularly or upon channel environment change
`of each terminal.
`<41>
`
`
`[Equation 1]
`<42>
`In Equation 1, αi indicates channel gain of a reverse link between a terminal and an ith base station,
`and αj indicates reverse link channel gain between a jth base station having the greatest channel gain among
`all base stations, and a terminal. In addition, βi indicates channel gain of a forward link between a terminal
`and an ith base station, and in the same way, βi and αj indicate forward channel gain between a jth base
`station having the biggest channel gain among all base stations, and a terminal.
`<43> Meanwhile, it can be viewed that channel gain of reverse link and forward link, not considering
`fading, are the same, so a small error arises in the channel gain that uses a certain average level to reduce
`fading effect, but it can be considered that they are identical to each other.
`
`.
`<44> Accordingly, Equation 1 satisfies
`<45>
`In addition, assuming total power transmitted by all base stations is nearly the same, if channel gain
`is multiplied by total power transmitted by the base station, in other words, if βi is multiplied by total power
`transmitted from a base station, this value is same as the total signal power received by any one terminal
`from an ith base station, in other words, the Ior.
`
`.
`<46> Therefore, as in Equation 1, the MR_PRI can be calculated using
`<47>
`In Equation 1, “Io” refers to total sum of signal power that is received from all base stations by a
`terminal (sum of Ior received from all base stations), and “max_Iorj” refers to signal power that is received
`from a jth base station, having the strongest reception signal power among all base stations.
`<48> The MS_PRI value indicates in an inversely proportionate manner the extent to which terminals
`may, on average, cause different cell interference on other cells.
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`<49>
`If the MS_PRI value is large, the probability of causing different cell interference on other cells is
`small; conversely, if the MS_PRI value is small, the probability of causing different cell interference on
`other cells increases.
`<50>
`In other words, stating that the MS_PRI value is large shows indirectly a high probability of a
`terminal being in a location close to a base station or in a location with favorable channel conditions. For
`calculation and determination of this MS_PRI value, the following three methods are possible.
`<51> First, there is a method in which a terminal calculates MS_PRI by using an Io value measuring total
`sum of signal power of all base stations received at a terminal, and one max_Ior value that is received as
`the greatest value among these base stations, and then, directly transmits this value to a base station.
`<52> Second, when a terminal transmits an Ec/Io value for the signal (Ec) power to a pilot that is received
`by each base station through a PSMM (Pilot Signal Measurement Message) reported to a base station, a
`base station receiving the same calculates MS_PRI value based on this value.
`<53> Third, if a reverse link channel notifying channel status of a forward link exists (for example, DRC
`(Data Rate Control) channel of a 1x EV DO system), a base station can calculate MS_PRI value based on
`the forward channel status value (for example, Ec/Nt for the pilot signal power (Ec)) that is transmitted to
`this channel.
`<54> 2) MS_RCV (MS Reverse Control Value)
`<55> The MS_RCV is a parameter for calculating transmission energy level that is required at each
`terminal and is calculated by Equation 3 below. To achieve this, function f(x) is first defined. Here, this
`MS_RCV value is expressed in units of dB.
`
`<56>
`[Equation 3]
`<57> Here, “Current_Assigned_Data_Rate” indicates data rate in a current transmission frame, and is a
`function related to reception energy required for normally receiving data rate called “x” in f(x) from a base
`station. For example, if the “Current_Assigned_Data_Rate” is 9600, it is a function for converting to a
`reception energy value calculated in advance for each data rate by equations such as f(9600) = 4dB.
`<58>
`In other words, the MS_RCV applies cell interference probability of a corresponding terminal to
`reception energy that is required at each terminal, and by using such MS_RCV, and the present invention
`can use lower transmission energy in terminals close to cells or with a good channel environment, rather
`than satisfying reception energy required in base stations. This is ultimately to cause a lower amount of cell
`interference.
`<59> Generally, the reception energy required at each terminal increases as the data rate increases.
`Therefore, the value of MS_RCV increases as “Current_Assigned_Data_Rate” increases.
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`<60>
`In α · MS_PRI of Equation 3, as previously described, MS_PRI is a value that indicates the
`probability of causing interference in different cells, and if this MS_PRI value is small, in other words, if
`the probability of causing different cell interference is high, the value of MS_RCV increases.
`<61> α of Equation 3 regulates the degree to which MS_PRI affects MS_RCV and is a variable for
`regulating fairness between users. A base station guarantees data rate of a fair level to all terminals by
`regulating this α. For example, if α = 0, channel status of a terminal is not considered, and fairness level
`between users is at its highest. Conversely, the channel circumstances of each terminal have a greater impact
`on MS_RCV the larger the value of α is.
`<62>
`In summary, the value of MS_RCV increases as the data rate currently being transmitted increases
`and as the MS_PRI (the higher the possibility of causing different cell interference) decreases. A base
`station calculates and manages MS_RCVs for all terminals in an active status.
`<63> 3) MS_IAB (MS Rate Increase Available Bit)
`<64> The MS_IAB is a parameter for providing effective data rate information for which transmission
`of a next frame of a terminal is possible and has two statuses, “increase” and “decrease,” according to the
`following conditions.
`<65> When the following conditions are all satisfied, the MS_IAB is set to “increase,” and if any one of
`the conditions is not satisfied, it is set to “maintain.”
`<66>
`I. When transmission power margin (reserve of transmission power that can be transmitted) is
`higher than or equal to the reference level,
`<67>
`II. When bit(s) that must be transmitted to a transmission buffer are higher than or equal to the
`reference level,
`<68>
`III. When the data rate (Current_Assigned_Data_Rate) that is currently transmitted is lower than
`or equal to the maximum data rate (MAX_data_Rate) established in a system,
`<69> Dedicated rate control for a terminal of a base station using the parameters (MS_PRI, MS_RCV,
`MS_IAB) will be explained using Fig. 2 below.
`<70> Fig. 2 is a flowchart showing an example of a dedicated rate control procedure for a terminal of a
`base station according to the present invention.
`<71> Referring to Fig. 2, a base station renews MS_PRI by receiving a report from a terminal of or
`directly calculating MS_PRI value, regularly or when channel circumstances of a terminal change. This
`MS_PRI value is renewed while initially being set to 0 (S20).
`<72> The base station calculates and manages MS_RCV value for terminals that exist in active status in
`its own base station by using the MS_PRI value and data rate that a terminal is transmitting, in other words,
`“Current_Assigned_Data_Rate” (S21).
`
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`<73> The base station measures total energy of signals that are received at this base station, in other
`words, total interference amount ROT value, each time it has a certain cycle (S22).
`<74> Each terminal transmits an MS_IAB value in units of each frame, to the base station (S24).
`<75> The base station generates (S23) a rate control command (Rate Control Command; hereinafter
`“RCC”) that will control the data rate of each terminal by using the MS_RCV value and MS_IAB, and
`transmits this RCC to each terminal (S25).
`<76> The RCC comprises three types of commands, an increase command in which a terminal increases
`data rate, a decrease command which decreases data rate, and a maintain command that does not change
`data rate.
`<77>
`If ROT status measured by the base station is good (if ROT is lower than ROT_TH1), and the value
`of the MS_RCV is below or equal to an arbitrary threshold (hereinafter “RCV_TH”), the MS_IAB sets
`RCC to “increase” for some terminals among terminals set to “increase,” and sets RCC to “maintain” for
`the remaining terminals.
`<78> However, if it is determined that ROT of a scope established in a system is maintained for the ROT
`measured by the base station (ROT_TH1~ROT_TH2), RCC for all terminals is set to “maintain.”
`<79> However, if status of ROT measured by the base station is judged to be poor (if ROT is larger than
`ROT_TH2), RCC for some terminals having MS_RCV exceeding the RCV_TH are set to “decrease,” and
`remaining terminals are set to “maintain.”
`<80>
`In the above method, specific figures for the number of terminals that will set RCC to “increase”
`or “decrease,” may differ depending on the environment actually subject to application, performance of
`systems, capacity, or other objectives of the business operator. Here, as one specific example that can be
`applied, the algorithm below is proposed.
`<81> First, parameter BS_RCV (BS Rate Control Value) is defined for finding the number of terminals.
`This BS_RCV has an initial value of the lowest MS_RCV value among the MS_RCV having a data rate of
`9.6 kbps (calculated in a corresponding base station or reported from a corresponding terminal).
`<82>
`In other words, the BS_RCV proposes a selection scope of the MS_RCV, and as a result, only
`terminals having MS_RCV above or below a certain level can receive data rate information of increase or
`decrease of RCC.
`<83> Fig. 3 is a figure showing a renewal process of BS_RCV according to the present invention.
`<84> Referring to Fig. 3, a base station measures total interference amount (ROT) that is received at this
`base station, in units of time having a certain cycle. A base station renews BS_RCV by using the measured
`ROT value.
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`<85>
`If the measured ROT value is less than or equal to ROT_TH1, BS_RCV increases by Δ1, and if it
`is greater than or equal to ROT_TH2, it decreases by Δ2. However, if ROT maintains scope of ROT_TH1
`and ROT_TH2, the BS_RCV maintains the previous BS_RCV value.
`<86> Fig. 4 is a figure showing a rate control information generation procedure using BS_RCV according
`to the present invention.
`<87> Referring to Fig. 4, a base station first renews BS_RCV value, as in Fig. 3, through a measured
`ROT value.
`<88> Subsequently, a base station generates RCC for each terminal by using the following conditions by
`using MS_RCV value, BS_RCV value, and MS_IAB received from a corresponding terminal, and then,
`transmits to each terminal. If conditions of “(MS_RCV + λ) < BS_RCV” and “MS_IAB == ‘increase’” are
`satisfied, RCC is set to “increase.”
`<89> However, if “MS_RCV > BS_RCV,” the RCC is set to “decrease.”
`<90> However, if “(MS_RCV + λ) ≤ BS_RCV” while “MS_IAB ≠ “increase” or “MS_RCV ≤ BS_RCV
`≤ (MS_RCV + λ)”, the RCC is set to “maintain.”
`<91> The present invention can use the λ to regulate the RCC allocation scope so as to be more suitable
`for the communication environment.
`<92> Reverse rate control using the BS_RCV will be explained below using Fig. 5 as an example.
`<93> Fig. 5 is a flowchart showing another example of a dedicated rate control procedure for a terminal
`of a base station according to the present invention.
`<94> A base station renews MS_PRI by receiving a report of MS_PRI value from a terminal or directly
`calculating it, regularly or when channel circumstances of a terminal change. This MS_PRI value is
`renewed while being initially set to 0 (S40).
`<95> The base station calculates and manages MS_RCV value for a terminal that exists in active status
`at its own base station by using the MS_PRI value and data rate that a terminal is transmitting, in other
`words, “Current_Assigned_Data_Rate” (S41).
`<96> The base station measures total energy of signals received at this base station, in other words total
`interference amount ROT value, each time it has a certain cycle (S42).
`<97> The base station renews BS_RCV as in the method of Fig. 3 (S43).
`<98> The base station generates RCC of each terminal by using the MS_RCV, MS_IAB, and the renewed
`BS_RCV (S44).
`<99> Each terminal transmits MS_IAB value to the base station in units of each frame (S45).
`<100> The base station generates (S46) a rate control command (Rate Control Command; hereinafter
`“RCC”) that will control data rate of each terminal by using the MS_RCV value, MS_IAB, and BS_RCV,
`and transmits this RCC to each terminal (S47).
`
`Ex. 1015 - Sierra Wireless, Inc.
`Sierra Wireless, Inc., et al. v. Sisvel S.P.A., IPR2021-01141
`Page 13 of 21
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`<101> A corresponding terminal receives RCC from all active base stations (S26, S47), generates
`combined RCC from these received RCCs, and controls data rate of a next frame according to the same
`(S27, S48). A combination method of RCCs received from all active base stations is as follows.
`<102> If all received RCCs are set to “increase,” combined RCCs are set to “increase.”
`<103> However, if even one of the received RCCs is set to “decrease,” combined RCCs are set to
`“decrease.”
`<104> For other cases, combined RCCs are set to “maintain.”
`[Effect of the Invention]
`<105> As explained above, since the rate control information according to the present invention is
`generated by considering not only the total interference amount received by RCC from a base station but
`also the reception status of each terminal, it makes dedicated rate control possible for each terminal.
`<106> In this way, a more enhanced data transmission suiting the channel circumstances of each terminal
`is achieved, which leads to obtaining a significant gain in data throughput.
`<107> In addition, accurate load regulation in a base station becomes possible, which leads to a significant
`gain in terms of base station operation as well.
`<108> Through the description above, a person having skill in the art will know that various changes and
`modifications can be made without departing from the technical spirit of the present invention.
`<109> Therefore, the technical scope of the present invention should not be limited by the details set forth
`in the embodiments but should be determined by the scope of claims.
`
`
`
`Ex. 1015 - Sierra Wireless, Inc.
`Sierra Wireless, Inc., et al. v. Sisvel S.P.A., IPR2021-01141
`Page 14 of 21
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`[Scope of Patent Claims]
`[Claim 1]
`A reverse link data rate control method comprising:
`a step of calculating transmission energy level required in a terminal by applying cell interference
`probability of each terminal;
`a step of receiving data rate information for which transmission of each of the terminals is possible;
`a step of generating data rate control information of each of the terminals, according to the
`calculated transmission energy level and data rate information.
`[Claim 2]
`The reverse link data rate