TW201010490A - Method and apparatus for setting an uplink transmit power level for a wireless communication unit - Google Patents

Abstract

An access point for supporting communication in a femto cell of a cellular communication network. The access point comprises transceiver circuitry arranged to enable communication with one or more wireless communication units located within the femto cell, and signal processing logic arranged to determine at least one macro cellular interference criterion; and set the femto cell uplink transmit power level based on the at least one determined macro cellular interference criterion.

Description

201010490 VI. Description of the Invention: [Technical Field] The field of the invention relates to a method and apparatus for setting a power transmission level of a wireless communication unit. More specifically, the field of the invention relates to a method and apparatus for setting a transmission power level of a wireless k-cell connected to a femto cell of a packet communication network. [Prior Art] A wireless communication system, such as a third generation (3G) mobile phone standard and technology, is known. One such example of 3G standards and technologies is the Universal Mobile Telecommunications System (UMTS), which was developed by the Third Generation Partnership Project (3Gpp) (www.3gpp.org). Typically, a wireless communication unit or user equipment (UE), as generally referred to in the 3G statement, communicates with a core network (CN) of a 3 (} wireless communication system via a Radio Network Subsystem (RNS). A wireless communication system typically includes a plurality of radio network subsystems, each of which includes one or more cells to which the φ UE may be attached, and thereby connected to the network. Third generation wireless communication has been developed to Used for macro cell mobile phone communication. Such a macro cell utilizes a high power base station (node B in 3Gpp) to communicate with the UE in a relatively large coverage area. Lower power (and therefore smaller) Region) femtocell or picocell is a recent development in the field of wireless cellular communication systems. Femtocells or picocells (the term femtocell is used below to include picocells or the like) are effectively The communication coverage area supported by the low-power base station (also known as the access point (AP)). These femtocells are intended to be 141317.doc 201010490 enough (four) to more extensively (4) E-chassis Supporting communication to the UE in a restricted (eg, in-building) environment. On this side, a femto cell that is intended to support communication according to 3GPP will be referred to as a -3G femto cell. Similarly, an access controller that is intended to support communication with a low power base station in a femtocell according to the 3GPP standard will be referred to below as a third generation access controller (5) ac). Similarly, the access point that is intended to support communication in a femtocell in accordance with the 3GPP standard will be referred to below as the third generation access point (3GAp). By way of example, typical applications for such femtocell gossip include residential and commercial (eg, office) locations, "hotspots", etc., whereby Internet connections can be made via, for example, a broadband connection or the like. An AP to a core network. In this manner, a femtocell can be provided in a simple, scalable deployment in a particular in-building location where, for example, network congestion at the macro-cell level may be problematic. As is familiar with this technology, it will be appreciated that in large scale deployments, it is envisaged that there will be up to several million femtocells within the macrocell layer. On a common channel part f_, the uplink interference from the UE (Femto UE) connected to the femto cell will become a major problem for the macro cell receiver. The noise experienced by the macrocell receiver due to interference from the femto UE will result in a reduction in the effective coverage of the camped cell. Accordingly, there is a need for an apparatus and method for setting a transmission power level of a wireless communication unit that substantially alleviates at least some of the deficiencies of the prior art and methods. SUMMARY OF THE INVENTION J4J3J7.doc 201010490 Accordingly, the present invention seeks to mitigate, alleviate or eliminate one or more of the above disadvantages, either individually or in any combination. According to a first aspect of the present invention, an access point for supporting communication in a femtocell in a cellular communication network is provided. The access point includes: a transceiver circuit configured to enable communication with one or more wireless communication units located within the femtocell; and a "signal processing logic module" and configured to at least Set based on a macro set of cellular interference criteria

Connected to the access point - the wireless communication unit - the femto cell uplink key power level 1 in the macro hive interference criterion includes at least one macro implemented by the unit - receiver The hive path loss measurement and the allowable of the macro hive interference criterion are allowed to estimate the maximum uplink transmission power. In this way, the access point can account for interference that can be experienced in the macro-cell receiver due to the uplink transmission of the wireless communication unit. In addition, the access point can correspondingly set and/or modify the upper key transmission of the wireless communication unit by 11 bits. & 'When transmitting in the femtocell, the wireless communication k is early TL uplink transmission The power level can be appropriately limited as needed to substantially limit any ones generated by, for example, at least one of the adjacent macro cell receivers (4) wireless communication elements. In an optional embodiment, the signal processing logic module can include a path loss request logic module configured to request the wireless communication unit to perform at least one macro cell (four) loss measurement and report "^ The path loss measurement to the ^ macro cell is returned to the access point. In the manner of 141317.doc 201010490, the access point can agitate the power control of the wireless communication unit based on potential interference caused by a neighboring macro cell (i.e., a cell of a type different from the type of the femto cell). In an optional embodiment of the present invention, the path loss request logic module is configured to request the wireless communication unit to perform the at least one macro cell periodically and/or in response to an event trigger. Path loss measurement. In an optional embodiment of the present invention, the maximum uplink transmission power of the estimated climber that satisfies the macroset cellular interference criterion is calculated based on a difference between the following: in the wireless communication a maximum allowed increment in uplink interference at a receiver of at least one neighboring macro cell of the unit; and the path loss measurement at the at least one neighboring macro cell receiver of the wireless communication unit. In an optional embodiment of the present invention, the signal processing logic module is further configured to set the femtocell uplink power level of the wireless communication unit based on at least one of the following lower values. : satisfying the estimated maximum uplink transmission power allowed by the macro hive interference criterion; and an uplink power value required to satisfy a coverage criterion. In an optional embodiment of the present invention, the femtocell uplink power level required to meet the coverage criteria may be satisfied based on at least one or more of the following: (〇 in the uplink - a given service) One target quality, (ii) a processing gain, (Ui) a thermal noise level measurement, 1413l7.doc -6- 201010490 (iv) - noise rising margin, (v) - maximum allowable path loss. A second aspect of the present invention provides a method of connecting to a femto-type wanted network--a femto cell--a femto cell-to-femtocell-power level, the method comprising Taking a point: determining at least one macro set of interference criteria; and setting the femto cell based on the at least one decision to J/a macro set interference criterion

An uplink power level, wherein the macro-homed interference criterion includes at least one macro-homed path loss measurement performed by one of the wireless communication units and an allowable one that satisfies the macro nested interference criterion Estimate the maximum uplink transmission power. According to a third aspect of the present invention, a wireless communication unit is provided that communicates with an access point in a femtocell of a cellular communication network. The wireless communication unit includes a transceiver circuit configured to receive a request from the access point to perform an interference measurement, such as a path loss measurement, for a macro cell transmission. The wireless communication unit further includes a signal processing logic module configured to perform an interference measurement, such as a path loss measurement, on the macro cell transmission in response to the request, wherein the transceiver circuit is configured to transmit The interference measurement transmitted to the macro cell and receiving a femto cell uplink transmission power level in response to the transmission to be used when communicating with the access point based on the macro hive interference criterion, wherein the macro hive The interference criterion includes at least one macro-accelled path loss measurement performed by one of the wireless communication units and an estimated maximum uplink transmission power that is acceptable to satisfy the macro-acquisition interference criterion. 141317.doc 201010490 In accordance with a fourth aspect of the present invention, a method of setting a femtocell uplink power level of a wireless communication unit coupled to a femtocell of a cellular communication network is provided. The method at the wireless communication unit includes receiving a request from a femtocell access point to perform an interference measurement on a macrocell transmission; and performing interference measurement on the macrocell transmission in response to the request. The method further includes transmitting the interference measurement transmitted to the macro cell to the access point; and receiving a femto-cell on-key transmission power level based on the macro-homed interference criterion in response to the transmission to Used in access point communication, wherein the macro-homed interference _ criterion includes at least one macro-accelled path loss measurement performed by one of the wireless communication units and is allowed to satisfy the macro-homed interference criterion An estimated maximum uplink transmission power. ▲ In accordance with a fifth aspect of the present invention, a wireless communication system is provided that is adapted to support any of the above methods of setting a key transmission power value to a wireless communication unit coupled to a femtocell. According to a sixth aspect of the present invention, a computer readable storage element is provided having a computer readable code stored thereon for programming a signal processing logic module to perform setting connection to a cellular type The above t' method of the power transfer level of one of the communication networks of the femto cell - the wireless communication unit. The code is operable to determine at least - a macro bee 1 - type interference criterion ' and a macro set of cellular interference based on the at least one decision (4) to set a (four) femto cell upper key power level ' Wherein the macro-homed interference criterion includes at least one macro-homed path loss measurement performed by one of the wireless communication units and satisfies the macro 704317.doc -8 - 201010490 interference criterion One estimates the maximum uplink transmission power. According to a seventh aspect of the present invention, ^ a computer readable storage element, ..., has a computer stored thereon, j 4 $ & ... a code is programmed in a stylized - signal processing logic group Implementing the above method of setting an uplink transmission power level of one of a wireless communication unit of a femtocell, which is connected to a cellular communication network. The code is operable to be in the wireless communication at 70. From a femtocell The access point receives a request to perform interference measurement on a macro cell transmission; • performs interference measurement on the macro cell transmission in response to the request. The code can be further operated to transmit to the macro cell. Transmitting the interference measurement to the access point; and receiving, in response to the transmission, a femtocell on-going chain moth power level based on the macro-homed interference criterion for use in communicating with the access point , wherein the giant 隼蛏 | 士工 & 杲 honeycomb interference (4) includes at least _ macro-hive path loss measurement performed by the receiver of the benefit line communication unit and satisfies the macro-hive interference criterion Allowed Estimating the maximum on-key transmission power. • These and other aspects, features, and advantages of the present invention will be apparent from and elucidated with reference to the specific embodiments illustrated herein. The uplink transmission can establish a significant level of interference to the macro cell receiver, thereby causing a reduction in the effective coverage area of the macro cell. In particular, the interference is due to the macro cell base station ( For example, there is no interaction between the Node B) and the radio resource management level between the femto cell access points. Therefore, the femto cell that determines the femto ue connection 1413l7.doc 201010490 uplink transmission power level The current access point does not have the means to consider the interference at the receiver of the macro cell, and to modify the power transmission level of the femto ue over the chain accordingly. Referring now to the drawings, and in particular, the illustration And generally, an example of a portion of a 3Gpp network adapted in accordance with an embodiment of the present invention is indicated at 1 。. In Figure i, the illustration includes a macro. An example of a communication system i 185 in combination with a plurality of 3 G femtocells 150 adapted in accordance with an embodiment of the present invention. For the specific embodiment illustrated in the figure, the radio network sub- The system (RNC) includes two different architectures configured to handle communication between the respective macro cells and the home picocell. In the macro cell situation, the RNS includes a radio with (in particular) signal processing logic module 13 8 A controller in the form of a network controller (RNC) 136. The RNC 13 6 is operatively coupled to a node b 124 to support communications within the macro cell 1 85. The RNC 136 is further operatively coupled to a core Network element 142' is, for example, a Servo Packet Radio System (GpRS) Support Node (SGSN)/Mobile Switching Center (MSC), as is known. In a femtocell situation, an RNS 11 〇 includes a network element in the form of a 3G Access Point (3G AP) 13〇 for performing a number of functions typically associated with a base station; A controller in the form of a 3G access controller (3G AC) 140. As will be appreciated by those skilled in the art, a 3G access point is a communication component that supports communications within a communication cell, such as a 3G femto cell, and provides the same via the 3G femto cell 150. Access to the cellular communication network. An envisioned application, a 3G AP 130 can be purchased by a member of Volkswagen and installed on its 141317.doc •10- 201010490 《 "3G AP 130 can then be connected on the owner's broadband Internet connection 16〇 To a 3G AC 140. Thus, a 3G AP 130 can be considered to include a scalable, multi-channel, two-way communication device that can be provided, for example, in residential and commercial (eg, office) locations, "hot spots", etc. to extend or improve here. The network within the same location is covered. Although there is no standard standard for a 3G Ap functional component, one example of a typical 3G Ap in a 3GPP system can include a Node B functionality and Radio Network Controller (RNC) l36 functionality. Some aspects of the feature ^ 3G AP 130 further includes a transceiver circuit 155 that is configured to be enabled and located within a general vicinity of the communication cell via a wireless interface (Uu), and in particular, a communication cell 15 Communication of one or more wireless communication units, such as user equipment (UE) 114, within. As shown, the 3G access controller 140 can be coupled to a core-network (CN) 142 via a specific interface. In this way, the 3G AP 130 can provide voice in a femtocell in the same manner as the conventional Node B in the macrocell but with, for example, the deployment simplicity of a wireless local area network φ access point. The data service is to a cellular handset, such as UE 114. - UE 114 may be a wireless communication unit that includes a transceiver 116 that is configured to transmit and/or receive signals, and a signal processing logic module 118. As will be appreciated by those skilled in the art, the UE 114 includes many other functions and logic components to support wireless communication and functionality and will not be further described herein. As mentioned previously, in large scale deployments, there can be as many as several million femtocells interspersed in the macrocell layer. In a common channel deployment 141317.doc •11· 201010490, uplink interference from UEs (Femto UEs) connected to the femto cell becomes a major problem for macro cell receivers. Based on clarity, the term "common channel deployment" relates to the case where two or more overlapping or neighboring cells are configured to utilize the same frequency channel. The noise experienced by the macrocell receiver due to interference from the femto 1;]6 will typically result in a reduction in the effective coverage area of the macrocell. Thus, for the particular embodiment illustrated in FIG. 1, the access point 13〇 has been adapted to include a signal processing logic module 165 configured to determine connectivity to the femto based on at least the mega-chassis interference criteria. The uplink transmission power level of the cell 15 such as one of the UE 114 wireless communication units. In this manner, the access point 130, or more specifically the illustrated embodiment, is the signal processing logic module 165, which can be considered at one or more macro cell receivers (e.g., at node B 124) Interference experienced by the femtocell uplink transmission of UE ΐ4, and the uplink power level of UE 114 is set and/or modified accordingly. Therefore, the uplink power transfer level of the UE 114 can be appropriately limited as needed, and the money sufficiently reduces the potential interference generated by the femtocell uplink power transmission of the certificate 114. This will potentially be caused by at least one adjacent giant. A set of cell receivers (e.g., Node B 12 sentences are experienced. According to an example of an embodiment of the present invention, signal processing logic module 165 can be configured to be small from at least one neighboring macro, based on wireless communication At least one macro cell path loss measurement criterion observed at one of the units (UE 114) determines one of the wireless communication units to be suitable for the picocell uplink power level. 141317.doc 201010490

As will be appreciated by those skilled in the art, typically at a network element (in this case, a Node B), or at the wireless communication unit, based on the difference between the transmitted power and the power level of the received signal. (Path loss) to determine the road loss measurement. For example, in the case where, for example, the Node B wireless communication unit's transmission power level is set to, for example, +4 〇 dBrn, the transmission signal may have a received signal of, for example, -90 dBm at the wireless communication unit. The level is received. Therefore, the wireless communication unit can measure the received signal power from the node b and subtract the received signal power from the identified transmission power level (+40 dBm) included in the received signal, and determine the path loss to be calculated as 130 dB. In accordance with some embodiments of the present invention, the signal processing logic module 165 of the access point 13 is operatively coupled to a request logic module configured to request path loss measurements from the UE 114. The macro cell transmits an indication of the transmission power level of the transmission to assist the UE in performing path loss measurements. For example, in a 3 (} pp transmission, the primary CPICH transmission power level of the macro cell is indicated by the system information, i.e., "SIB 5".

P Equation 1 below illustrates an example of an algorithm that can be implemented by the nickname processing logic module 165 to determine the maximum allowable femto cell winding of the UE U4 in accordance with certain embodiments of the present invention. Power bit 2

[Equation U

[Equation 2]

PuL=min(PUL;max, max(PUL)neW} PUL min)) where:

PuL, new = min(PUL>inaxincr, PuL.coverage) 141317.doc ,, 201010490 and where:

PuL’maxiner represents an estimated maximum uplink transmission power level that is acceptable for one of the macro cell's uplink interference criteria, and

PuL,c〇verage represents the uplink transmit power level required to satisfy a femtocell coverage criterion.

Equation 1 maintains the calculated value of the femtocell uplink transmission power to the maximum and the minimum allowable transmission power. In this manner, the signal processing (10) module 165 is configured to determine the chain transmission power of the u 114 based at least in part on satisfying the macro set of cellular guidelines PuL, maxiner allowable estimation of the maximum uplink transmission power. The UE ii 4 uplink power shoulder level controlled by the power control logic module (not shown) by the access point can be limited by the signal processing logic module (6) of the access point 13〇 Emperor (set), so that the interference experienced by the macro-cell node B 124 as the uplink of the femtocell uplink transmission of the UE 114 can be sufficiently dropped 0. Furthermore, at least the calculation satisfies the macro-honey type Interference

Can be introduced to the dip / Shishi, and UL'max " 〇 ^ maximum uplink transmission power and meet the lower limit of the string power required to cover a quasi-j, the upper power level can be set The money should be covered (4) to be satisfied, and only (4) the power level is maintained by the rumor. The bit if the macro hive interference criterion required by the cellular interference criterion is limited to remain in the 'when caused by the interference, however, when the uplink transmission level exceeds the required level, the uplink transmission The level can be added to the requirements of the macro hive interference criterion. Thus, when 141317.doc -14-201010490 is considered too high, the interference experienced by Node B 124 as a result of the uplink power transmission level of UE 114 can be substantially limited. The following is an example of an algorithm that is equivalent to 3, which is used to calculate the macro-hit interference criterion puL maxin "allowable to estimate the maximum uplink transmission power: PUL, maxlnc-RSSIUL, maxincr_PLUL, macr. [Equation 3] where: • RSSIuL, maxincr represents the maximum allowed increment in the upper-chain interference as perceived by the macro-cell receiver of Node B 124 of UE 114, and PLUL, maer. Indicates a path received at UE 114 Loss measurement. In this way, the maximum allowable delta RSSIu in the uplink interference is measured at a macro-cell receiver. One can be used to set a macro-hit interference criterion f to receive by the macro cell. The amount of interference experienced by the interferer on the transmit power level of UE Π 4 may vary depending on the value of the maximum allowable delta RSSIUL maxiner in the uplink interference given to the receiver at the macro cell. The path loss measurement performed at the UE 114 is a dynamic indication of the level of interference experienced by the macro cell receiver due to transmission by the fairy 114. Specifically, at the UE 114 The macro J and the path path loss measurement at the receiver provide a component by which the femto cell access point 130 can consider the interference at the macro cell receiver and modify the UEs accordingly. The pico cell uplink power transmission level. Return to reference equation 2' and as mentioned previously, ~ "represents the femto cell uplink transmission power required to meet the - femto cell coverage criteria 14I317.doc •15- 201010490 quasi. Equation 4 below illustrates an example of a calculation that can be used to determine a femtocell uplink power level required to satisfy a coverage criterion PuL, coverage

Pul,coverage-·~~Ρ〇 + N0 + NR^-MAPL

[Equation 4] where: I represents the target signal and noise quality of a given service on the uplink, and specifically represents a target signal and noise measurement required for a given service, PG represents a Processing gains, which are related to multiple access techniques and are the result of a solution in a CDMA system, N. Representing a thermal noise level measured, for example, at point no, NRM represents, for example, a noise rise margin at access point 130, and MAPL represents a maximum allowable path loss, which is translated into One of the targets of the winding is covered. The femtocell is configured by the operator using the MAPL parameters for a target coverage area. This value can be changed by, for example, operating and managing (〇&M) entities. Thus, Equation 2 states that the femtocell uplink transmit power level should be the minimum level required to satisfy the femtocell coverage requirement and the minimum interference caused to the target cell. The operator can limit the maximum interference caused by a UE connected to the femto cell on the macro cell. The minimum UL transmission power is determined by the specification and is -50 dBm in 3G pp. The UL transmission power covered is determined by MAPL and service requirements. 14I317.doc 16 201010490 Therefore, it can be determined based on a macroset cellular interference criterion (pUL, maxinc) and the femtocell uplink power level required to satisfy the femtocell coverage criteria (pUL, c<)verage) A new femtocell uplink power level (PuL, new). Referring back to Equation 1, the signal processing logic of the illustrated embodiment, '65 can be progressively configured to be based on a maximum possible femtocell uplink transmit power level pULmax and a minimum possible femtocell uplink φ #输功率位位PULmin determines the UE 114's femtocell uplink key transmission rate level. In particular, the 'signal processing logic module 丨65 can be configured to use the femtocell uplink power transmission value. (pm) to the new femtocell uplink transmit power level (Pul) within the maximum possible femtocell uplink transmit power level (PULmax) and the smallest possible femtocell uplink transmit power level (puL limit). For example, the maximum and minimum possible femtocell uplink transmission power levels of the UE 114 may be set according to a 3GPP specification such as 3Gpp TS25.101, or according to an operator defined criterion. • In a particular embodiment of the invention It is contemplated that the signal processing logic module 165 is configured to be based on adjacent co-channel or neighboring channel macro cells (eg, substantially the closest adjacent co-channel macro cell or neighboring pass) The macro-homed interference criterion of the mega-cylinder cell is used to determine the UE m-up-chain transmission power value. Referring now to Figure 2', as illustrated by an access point and in accordance with certain embodiments of the present invention An example of a simplified flow chart of a method for transmitting a power value on a key of a wireless communication unit of a cellular communication network - a femto cell - an example of the flow chart I4I3J7 in step 2〇5 .doc -17- 201010490 Start with the femtocell access point (AP). An action origination (m〇) / 仃 终止 termination (MT) call request is received, and by a grant in the Ap The control logic module accepts, as shown in step 21, in response to the above operation 'The AP commands the (four) quantity to select one or more macro cell path losses' as shown in step 215. Next, in the steps In 220, the AP receives a macro cell path loss measurement from the UE and calculates a maximum uplink transmission power that is allowed by the 1; £ to satisfy the macro-hit interference criterion (PM(4)). In the at least one phase At the neighboring macro cell receiver, a difference between the maximum allowed increment of the key burst and the macrocell path loss by the UE/wireless communication unit receiver is sensed. The AP, for example, transmits using Radio Resource Control (RRC) signaling - one of the maximum allowed femto cell uplink transmission power levels is indicated to the UE, as shown in step 225. Then, and optionally And periodically - and/or in response to an - event trigger, the Ap receives a measure of the path loss or multiple path loss from the ue, as shown in step 230. For example, 'the periodicity can be regarded as a few minutes because the Ap Usually support low speeds • Here sudden changes in path loss will be considered a rare event. In addition, for example, when the path loss to the macro (four) is reduced to exceed the limit, for example, the UE moves to the temple outside the building, the adjustment can be made. ^ The ^ can then re-evolve the maximum allowable uplink transmission power level of the UE, for example, by using the above equations [2, 3, 4], as shown in step 235. The new uplink transmission power value is determined based on the macro-homed interference criterion (PUL-) and the smaller of the upper-key power values required to satisfy a 141317.doc -1S-201010490 criterion (PuL, coverage) (PUL new) ). Next, in step 240, a decision is made by the AP to whether the maximum UE transmission power has changed. If it is determined in step 240 that the maximum UE transmission power has not changed, then the flowchart returns to step 23〇 in a loop. If it is determined in step 24 that the maximum UE transmission power has changed, the AP uses, for example, an RRCs message to transmit a new value of the maximum allowed femtocell uplink transmission power to the UE, as shown in step 245. The flowchart then returns to step 230 in a loop. The uplink transmit power value (PuL) is then set to a new uplink transmit power within a maximum possible uplink transmit power level (pUL max) and a minimum possible uplink transmit power level (PUL, min). Value (puL, new). Referring now to FIG. 3, an example of a simplified flowchart 300 of a method of setting a transmit power level of a wireless communication unit, as embodied by a wireless communication unit in accordance with some embodiments of the present invention, is illustrated. The process circle starts with a UE that performs an action initiation (M〇)/action termination (MT) call request, and the request is received and owed by a grant control logic module in the AP, as in step 3 Shown in 5. In response to the above operation, the receiving AP command to measure a selected one or more macro cell path losses, as shown in step 310. The UE then measures the path loss on the selected or plurality of macro cells and transmits the macro cells PL to the AP as shown in step 315. The UE then receives the maximum allowed femtocell uplink transmit power indication from the Ap (e.g., RRC), as shown in step 32. This 141317.doc -19- 201010490 applies the maximum allowable femtocell uplink transmit power value to its internal loop power control, as shown in step 325. The UE may then receive and apply one or more of the maximum allowed uplink transmission power from the AP during, for example, a call, as shown in steps 330 and 335. Although specific embodiments of the present invention have been described with reference to the implementation of a path loss measurement as an interference criterion, it is contemplated that other interference measurements can be used. For example, it is contemplated that the path loss may not be calculated explicitly, but the interference value or equation or calculation may be used with particular embodiments of the invention associated with, for example, a path loss calculation. Referring now to Figure 4, a typical computing system 400 is illustrated which may be used to implement signal processing functionality in accordance with specific embodiments of the present invention. This type of computing system can be used in access points and wireless communication units. Those skilled in the art will also recognize how to implement the invention using other computer systems or architectures. Computing system 400 can represent, for example, a desktop, laptop or notebook computer, handheld computing device (PDA, mobile phone, etc., palmtop, etc.), host computer, feeder, client or may need Or any other type of dedicated or general purpose computing device suitable for a given application or environment. Computing system 400 can include one or more processors, such as a processor 4〇4. Processor 404 can be implemented using a general purpose or special purpose processing engine (e.g., like a microprocessor, microcontroller, or other control logic module). In this example, processor 404 is coupled to a bus 4 〇 2 or other communication medium. The computing system 400 can also include a primary memory such as random access memory (r a m ) or another dynamic memory to store information and instructions to be executed by the processor 4〇4. The primary memory dump can also be used to store temporary variables or other intermediate information during execution of instructions to be executed by the processor 404 141317.doc -20- 201010490. Computing system 400 can also include static information and instructions that are coupled to bus-receiving memory (ROM) or other static storage device processor.

The computing system 400 can also include an information storage system 41() that can include, for example, a media drive 412 and a removable storage interface 42. The media drive 412 can include a drive or other mechanism for supporting a fixed or removable storage medium, such as a hard disk drive, a floppy disk drive, a tape drive, a compact disc drive, a compact disc (CD), or a digital video drive. (DVD) Read or write drive (R or RW), or other removable or fixed media drive. Storage medium 418 can include, for example, a hard disk, floppy disk, magnetic tape, optical disk, (3) or DVD, or another secure or removable medium that is read and written by media drive 412. As such, the storage media may include a computer readable storage medium in which particular computer software or material has been stored. In an alternate embodiment, the information storage system 41 can include other similarities and components to allow computer programs or other instructions or materials to be loaded into the computing system 4G0. Such components may include, for example, a removable storage unit 422 and an interface, such as a program and a interface, a removable memory (eg, a flash memory or a separate slot), and software. And the data-removable memory module) and the memory self-removable storage unit 422 are transferred to other removable storage units 422 and interfaces 42 of the computing system 400. . Communication interface 424 can be external device transfer. Computing system 400 can also include a communication interface 424 for allowing software and data to be sent to computing systems 4 〇〇 141 317.doc - 21 - 201010490. Examples of the communication interface 424 may include a data machine, a network interface (such as an Ethernet or another NIC card), a communication port (such as a universal serial bus (USB) port), a _PCMCIA slot, and Card and so on. The software and data transmitted via communication interface 424 are in the form of signals that are capable of receiving electronic, electromagnetic, and optical or other signals through communication interface 424. These signals are provided to communication interface 424 via a channel 428. This channel 428 can carry signals and can be implemented using a wireless medium, wire or cable, fiber optics, or other communication medium. Some examples of a channel include a telephone line, a cellular telephone link, an RF link, a network interface, a regional or wide area network, and other communication channels. In this document, the terms "computer program product", "computer readable medium" and the like are generally used to refer to media such as memory 4, storage device 418 or storage unit 422. These and other forms of computer readable media may store one or more instructions for use by the processor 4 to cause the processor to perform the specified operations. Such instructions, generally referred to as "computer code" (which may be grouped in the form of a computer program or other group), when executed, enable the computing system 400 to perform the functions of a particular embodiment of the present invention. It should be noted that the code may directly cause the processor to perform specified operations, be compiled to be so implemented and/or combined with other software, hardware, and/or firmware components (eg, a library for performing standard functions) such that Implemented. In a particular embodiment in which the components are implemented using software, the software can be stored in a computer readable medium and loaded into computing system 4 using, for example, removable storage unit 422, driver 412, or communication interface 424. In the middle. The control logic (in this example, a software instruction or computer code) 141317.doc -22- 201010490, when executed by the processor 404, causes the processor 4 to implement the functions of the present invention as described herein. It should be understood that the above description has been described with reference to the various functional elements and However, it should be understood that any suitable functional distribution between different functional elements or processors (e.g., relative to a controller) may be used without detracting from the invention. For example, it is contemplated that the description may be performed by the same processor or controller as the functionality implemented by the separate processor or controller. Therefore, a reference to a particular functional unit is only to be seen as a reference to a suitable component of the functionality of the description, rather than a strict logical or physical structure or organization. Aspects of the invention may be practiced in a suitable form, including a hard body, a sling, or any combination of these. The invention may optionally be implemented at least in part as a computer software running on - or a plurality of data processing devices and/or digital signal processors. Thus, the components and slaves of one embodiment of the present invention may be physically, functionally, and logically configured in any suitable manner. In fact, functionality can be implemented in a single-unit, in a plurality of units, or as part of other functional units. Although a specific embodiment of the present invention describes an AP for a UMTStm network, it is contemplated that the inventive concept is not limited to this specific embodiment. Although the present invention has been described in connection with the specific embodiments thereof, it is not intended to be limited to the specific forms set forth herein. On the contrary, the invention of the invention is limited only by the scope of the accompanying claims. In addition, although - the feature may look awkward. The specific embodiments are described, but those skilled in the art should. The various features of the specific embodiments of the invention can be combined with the 14I317.doc-23-201010490 combination in accordance with the present invention. In the scope of the patent application, the term "comprising" does not exclude the presence of other elements or steps. Moreover, the specific embodiment can be implemented as a computer readable storage element having a computer readable code stored thereon for programmatic-computer (example 2 'contains-signal processing device) to be implemented as described herein Examples of such computer readable storage elements include, but are not limited to, hard disks, - CD-ROMs, - optical storage devices, magnetic storage devices, read-only memory (r〇M) , - Programmable Read Only Memory (PROM), - Erasable Programmable Read Only Memory, - Erasable Programmable Read Only Memory (EEPROM), and - Flash Memory. In addition, it is contemplated that, although there may be significant efforts and many design choices that are driven by time, current technology, and economic considerations, it is understood by the concepts and principles disclosed herein. The skilled person will readily be able to generate such software instructions and programs with minimal experimentation. Further, although individually listed, a plurality of components, component steps may be implemented by, for example, a single-unit or a processor. Individual features may be included in different claims, but such features may be advantageously combined 'and the inclusions in different claims do not imply that a combination is not feasible and/or advantageous. In addition, the uncategorized category The inclusion of features does not imply a limitation on this category, but indicates that the levy is equally applicable to other categories of claims. In addition, "the order of features in the scope of the patent does not imply such characteristics. The order of the individual steps used in any particular order and in the QI method reference 141317.doc -24· 201010490 does not imply that this order must be The steps are carried out. Instead, the steps may be carried out in any suitable order. In addition, the singular references do not exclude plurals. Therefore, for "one", "one", "first", "second", etc. Reference does not exclude plural.

Accordingly, a method and apparatus for setting an uplink communication power value of a wireless communication unit connected to a femto cell of a cellular communication network has been described, which substantially solves the prior art of setting a transmission power value of a wireless communication unit And/or at least some of the shortcomings of the organization. BRIEF DESCRIPTION OF THE DRAWINGS A specific embodiment of the present invention has been described by way of example only and with reference to the accompanying drawings in which: FIG. 1 illustrates an example of a portion of a cellular communication network adapted in accordance with the present invention; 2 illustrates an example of a simplified flow chart of a method of setting an uplink transmission power level of a wireless communication unit as determined by an access point in accordance with certain embodiments of the present invention; FIG. 3 is illustrated by An example of a simplified flow chart of a method for setting a transmission power level of a wireless communication unit over the chain implemented by a wireless communication unit in accordance with some embodiments of the present invention; and FIG. 4 is illustratively applicable to the present invention. A typical computing system that implements signal processing functionality in a specific embodiment. [Description of main component symbols] 100 Communication System U〇 Radio Network Subsystem (RNS) 141317.doc -25- 201010490 114 116 118 124 130 136 138 140 142 150 155 160 165 185 400 402 404 408 410 412 418 420 422 424 Device (UE) transceiver

Signal Processing Logic Module Node B 3G Access Point (3G AP) / Access Point Radio Network Controller (RNC) Signal Processing Logic Module 3G Access Controller (3G AC) Core Network Element 3G Femto Cell / Communication Cell Transceiver Circuit Broadband Internet Connection Signal Processing Logic Module Macro Cell Counting System Bus Bus Processor Main Memory Information Storage System Media Drive Storage Media/Storage Device Removable Storage Interface/Interface Removable Storage Unit Communication interface channel 141317.doc -26- 428

Claims (1)

201010490 VII. Application for Patent Park: 1. An access point for communication in a femtocell in a cellular communication network. The access point includes: a transceiver circuit configured to enable and locate Communication with one or more wireless communication units within the femtocell; and 4 a signal processing logic module configured to set a transmit power level of a femtocell uplink power of a wireless communication unit connected to the access point based on at least one macroset interference criterion, wherein the giant The set of cellular interference criteria includes at least one macro-homed path loss measurement performed by one of the wireless communication units and an estimated maximum uplink transmission power that is acceptable to satisfy the macro-homed interference criterion. 2. The access point of claim 1, wherein the signal processing logic module includes a = loss request logic module configured to request the wireless communication unit to perform at least one macro cell path loss measurement and report The at least one macro cell path loss measurement is returned to the access point. 3. The access point of claim 1, wherein the path loss request logic module is configured to request the wireless communication unit to perform the at least one macro cell path loss by periodically and/or in response to an event trigger measuring. 4. The request point of the request, wherein the calculation satisfies the nested interference based on a difference between the following: (4) Allowable (4) Estimate the maximum uplink transmission power: at least one tone from the wireless communication unit a maximum allowable increment of uplink interference at a receiver of the neighboring macro cell; and the path loss spike at the at least one phase unobserved macro cell receiver 141317.doc 201010490 of the wireless communication unit . 5. The access point of claim 1, wherein the signal processing logic module is further configured to set the femtocell uplink power level of the wireless communication unit based on the following - lower value: The maximum maximum key transmission power that is allowed to be satisfied by the -Hig macrocell interference criterion; and an uplink power value required to satisfy a coverage criterion. 6. ^ The access point of claim 5, wherein at least one or more of the following decisions are taken to satisfy the femtocell uplink power level required by the coverage criteria: (i) one of a given service in the uplink Target quality, (i〇—processing gain, (iii) a received thermal noise power level, (iv) – noise rising margin, (v) – maximum allowable path loss. a point, wherein the at least one macro cell comprises a common channel macro cell or a neighboring channel macro cell. 8. The access point of claim 7, wherein the at least one macro cell is the geographically closest adjacent common channel a macro cell or a neighboring channel macro cell. 9. An access point of the request item, wherein the signal processing logic module is further configured to determine the femto of the wireless communication unit based on at least the following items Cell uplink transmission power level: (0 - maximum possible femto cell uplink transmission power level, (ii) a minimum possible femto cell uplink transmission power level. 1413l7.doc 201010490 10. As claimed in claim 1 Pick up point The feature is further that the access point is a second generation (3G) access point, and the cellular communication network comprises a universal mobile telecommunications system network. One of the settings is connected to one of the cellular communication networks. A method for transmitting a power level in a femtocell of a wireless communication unit of a pico cell, the method comprising: at a pick-up point: determining at least one macro-hive interference criterion; and determining at least one decision a macrocell hive interference criterion for setting the femtocell uplink power level, wherein the macrocell interference criterion includes at least one macroset path loss measurement performed by a receiver of the wireless communication unit and An estimated maximum uplink transmission power that is allowed by the macro hive interference criterion. 12. A wireless communication unit that communicates with an access point in one of the femtocells of a cellular communication network, the wireless communication The unit includes: a transceiver circuit configured to receive a request from the access point to perform an interference measurement on a macro cell transmission by φ; A signal processing logic module configured to perform interference measurement on the macro cell transmission in response to the request, wherein the transceiver circuit is configured to transmit the interference measurement transmitted to the macro cell and respond Receiving a femtocell uplink transmit power level for transmission to use when the communication with the access point is based on at least a macro-acoustic interference criterion, wherein the macro-acquisition interference criterion is included by the wireless communication unit At least one macro-homed path loss measurement performed by one of the receivers and an estimated maximum uplink transmission power of the 141317.doc 201010490 is satisfied by the macro-homed interference criterion. 13. - Setting a connection to a hive Method for transmitting a power level in a femtocell uplink of a wireless communication unit of one of the femtocells, the method comprising: receiving, at the wireless communication unit, a request from a femtocell access point Performing an interference measurement on a macro cell transmission; performing an interference measurement on the macro cell transmission in response to the request; Transmitting the interference measurement transmitted to the "Huiji cell" to the access point; and v receiving the received power level in response to the transmission based on the 忒 macro-hit interference criterion to receive the connection with the femto cell Point communication seasonal m-set interference criterion includes at least one macro-homed path loss measurement by the wireless communication, and the maximum allowable-estimated maximum satisfaction of the macro-acquisition interference criterion 』 Chain transmission power. Kind of line-to-k system' its adaptation applies to support as requested item 11 or amount The setting of L term 13 is coupled to a method of transmitting power values of an uplink of a wireless communication unit of a femto cell. 15. A computer can read Jingniu, and has a computer readable code stored thereon to programmatically connect to the _^ Α, the - femtocell A method of power transmission level of a wireless communication unit, the code operable to: 疋 at least one macro-set interference criterion; and based on the macro-homed interference criterion of the at least one (five) and fourty-six Setting a 141317.doc -4-201010490 picocell uplink power level, wherein the macro nested interference criterion includes at least one 16-bit cellular path loss measurement performed by the receiver of the wireless communication unit and An estimated maximum winding drive power is allowed to satisfy the macro hive interference criterion. A computer readable material element having a computer readable code stored thereon for stylizing signal processing (4) modules for performing a wireless communication unit configured to connect to a femtocell-femtocell a method for transmitting power in a domain, the code being (4) for receiving at the wireless communication unit: receiving from a femtocell access point - requesting to perform an interference measurement on a macrocell transmission; responding to the request Performing an interference measurement on the macro cell transmission; transmitting (4) interference measurement to the access point to the macro cell; and receiving a response in response to the transmission based on at least the macro hive interference criterion The femtocell uplink transmission power level is used when communicating with the access point, where the macro-hive interference criterion includes at least one macro-homed path implemented by the wireless communication-only receiver Loss measurements and the allowable acceptance of this macro hive interference criterion—estimate the maximum uplink transmission power. The computer readable storage element of claim 15 or claim 16, wherein the computer readable storage medium comprises a hard disk, _cd_r〇m, an optical storage device, a magnetic storage device, and a read-only memory (dirty) , a programmable read-only memory (PR〇M), an erasable programmable read-only 141317.doc 201010490 memory (EPROM), an erasable programmable read-only memory (EEPROM) And at least one of a flash memory. 141317.doc