WO2012019409A1

WO2012019409A1 - Method and system for obtaining region size of closed-loop power control

Info

Publication number: WO2012019409A1
Application number: PCT/CN2010/080077
Authority: WO
Inventors: 陈宪明; 宁丁; 关艳峰; 鲁照华; 方惠英
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-08-12
Filing date: 2010-12-21
Publication date: 2012-02-16
Also published as: CN102378334B; CN102378334A

Abstract

A method and system for obtaining the region size of the closed-loop power control are provided in the present invention. The method includes the following steps: A control station and a dependent station obtain the system configuration parameters; based on said system configuration parameters and the presetting rule, said control station and said dependent station obtain the region size of the closed-loop power control. In present invention, the control station is not needed to definitely inform the dependent station by the system control signaling, the control station and the dependent station calculate the region size of the closed-loop power control respectively according to the system configuration parameters and the presetting rule, and the related system control overhead is saved.

Description

TECHNICAL FIELD The present invention relates to the field of wireless technologies in the communications industry, and in particular, to a method and system for acquiring a size of a closed loop power control region. BACKGROUND OF THE INVENTION As one of the most promising access technologies in the next generation communication network, broadband wireless access technology is receiving more and more attention from the industry. Mobile WiMAX ( Worldwide Interoperability for Microwave Access) is the current representative of wireless broadband access technology. Its current commercial technology standard IEEE 802.16e aims to be backward compatible and only supports fixed access. IEEE 802.16d standard. As an extension of the fixed access technology, it adds support for terminal mobility, enabling mobile terminals to switch and roam between different base stations. However, in order to further improve the wireless access performance of mobile WiMAX and meet the increasing demand for high transmission rate and high-speed mobility, the continued evolution of mobile WiMAX has already been mentioned in the agenda. The corresponding technical standard IEEE 802.16m draft has also been released. . In a wireless communication system, if only relying on rate control cannot guarantee the reliability of uplink transmission, or in order to effectively control the level of interference to adjacent control stations, normally, a closed loop power control mechanism will be introduced by the system to ensure The service control station or the target signal received by the interference control station is a Signal Interference Noise Ratio (SINR). For Orthogonal Frequency Division Multiplexing (OFDM) systems, in order to implement closed-loop power control for uplink transmission, the system usually uses part of the time-frequency resource region for downlink control as a closed-loop power control region to carry the closed-loop power control region. Power control signaling. For example, the PC A-MAP (Power Control Advanced-MAP) area defined by the current IEEE 802.16m physical layer is used by the system as a closed-loop power control area; the MAP can be understood as being used to carry certain A specific time-frequency resource region from the high-level information, where the high-level information is specifically closed-loop power control information. FIG. 1 is a schematic diagram of a frame structure when an uplink subframe ratio is 5/3 under the current IEEE 802.16m standard. As shown in FIG. 1, each downlink subframe includes an A-MAP area for carrying downlink control signaling, and each uplink subframe includes an uplink feedback (UL-FEEDBACK) area i for carrying uplink feedback signaling. Or, wherein the A-MAP area i or the unit of the uplink feedback area i or the size is The Logic Resource Unit (LRU) is also included, and the A-MAP area is not necessarily related to the size of the uplink feedback area. 2 is a schematic diagram of an A-MAP structure in each downlink subframe of the current IEEE 802.16m standard. As shown in Figure 2, A-MAP area i or Hybrid Automatic Repeat reQuest (HARQ) A-MAP area i or PC A-MAP area i or resource allocation A-MAP area i Or the composition, and each of the above areas i is composed of a plurality of information elements (IEs), and the control station and the subordinate stations only transmit or receive the HARQ and PC A-MAP area sizes in advance. Subsequent resource allocation control information elements. In the prior art, after determining the size of the PC A-MAP area, the control station explicitly notifies each subordinate station PC A-MAP area i or size by using the "PC A-MAP size indicator" in the system parameter. , As shown in Table 1. However, this method has the following drawbacks: First, it increases the control signaling overhead; secondly, since the indication information field has only two bits, indicating that the granularity is insufficient, that is, it is impossible to sufficiently cover enough indication scenarios, In certain cases, in order to ensure that the number of PC A-MAP information units meets the requirements, PC A-MAP resources are inevitably wasted. Table 1 - PC A-MAP Size Indicator

SUMMARY OF THE INVENTION The main object of the present invention is to provide a method and system for acquiring the size of a closed loop power control region, so as to at least solve the problem that the size of the closed loop power control region is transmitted by using specific signaling in the system, thereby increasing the system control resource overhead. . According to an aspect of the present invention, a method for obtaining a size of a closed loop power control region is provided, including: a control station and a subordinate station acquire system configuration parameters; and the control station and the subordinate station acquire closed loop power control according to system configuration parameters and predetermined rules. Area size. Preferably, in the technical solution, the control station and the subordinate station acquire the closed loop power control region according to the system configuration parameter and the predetermined rule, where: the control station and the subordinate station system configuration parameter and the predetermined rule acquire the content included in each downlink subframe. The number of closed loop power control information units that can be allocated; the control station and the subordinate station obtain the number of closed loop power control information units actually included in each downlink subframe according to the number of assignable closed loop power control information units included in each downlink subframe; The station and the subordinate station obtain the size of the closed loop power control region according to the number of closed loop power control information units actually included in each downlink subframe. Preferably, in the technical solution, the number of assignable closed-loop power control information units included in each downlink subframe refers to the maximum number of closed-loop power control information units that each downlink subframe can allocate to the subordinate station, and is not greater than The number of closed loop power control information units actually included in each downlink subframe. According to another aspect of the present invention, a system for obtaining a size of a closed loop power control region is provided, including a control station and a subordinate station, wherein: the control station and the subordinate stations both include: an acquisition module for acquiring system configuration parameters; The power control area size obtaining module is configured to obtain a closed loop power control area size according to system configuration parameters and a predetermined rule. According to the present invention, the control station and the subordinate station are configured with the system configuration parameters, and the closed loop power control region size included in each downlink subframe is obtained based on the predefined rules defined by the two parties, and the defect that the control station needs to transmit the control signaling is solved. , and thus achieve the effect of saving system control resource overhead. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a schematic diagram of a frame structure when an uplink subframe ratio is 5/3 in the prior art IEEE 802.16m standard; FIG. 2 is an A-MAP in each downlink subframe of the prior art IEEE 802.16m standard. 3 is a schematic structural diagram of an uplink feedback region in each uplink subframe of the IEEE 802.16m standard in the prior art; FIG. 4 is a flowchart of a method for acquiring a size of a closed loop power control region according to Embodiment 1 of the method of the present invention; 5 is a flowchart of a method for acquiring a size of a closed loop power control region according to Embodiment 2 of the method of the present invention; FIG. 6 is a flowchart of a method for obtaining a size of a closed loop power control region according to Embodiment 3 of the method of the present invention; According to the FFBCH and PC corresponding to the subordinate station A in the fifth embodiment of the method of the present invention

A schematic diagram of the A-MAP IE location; FIG. 8 is a schematic diagram of the FFBCH and PC A-MAP IE locations corresponding to the subordinate station A in the sixth embodiment of the method according to the present invention; FIG. 9 is a system embodiment according to the present invention. Schematic diagram of a system for obtaining a closed loop power control region size. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention retains the original feedback function of the uplink fast feedback channel (FFBCH), and uses the FFBCH as the uplink reference signal of the closed loop power control, and makes the closed loop power control information unit corresponding to the designated subordinate station (PC A -MAP IE ) corresponding to FFBCH

FIG. 3 is a schematic diagram of an uplink feedback region i or a structure in each uplink subframe of the current IEEE 802.16m standard. As shown in FIG. 3, the uplink feedback area is composed of a HARQ FBCH and an FFBCH, where the HARQ FBCH may include multiple HARQ feedback areas i or, and the uplink feedback area (UL FEEDBACK SIZE) size is larger than the HARQ feedback area, and is passed through the system. The parameters are obtained. Each uplink subframe has the same uplink feedback area size. However, in the TDD (Time Division Duplex) mode, each uplink feedback area i or the number of HARQ FBCHs and FFBCHs included may be different. Method Embodiment 1 FIG. 4 is a flowchart of a method for acquiring the size of a closed loop power control region according to Embodiment 1 of the method of the present invention. As shown in FIG. 4, this embodiment includes the following steps: Step S402, the control station and the subordinate station respectively acquire system configuration parameters. In step S404, the control station and the subordinate station respectively obtain the size of the closed loop power control area according to the system configuration parameter and the predetermined rule. In this embodiment, the system configuration parameters acquired by the control station and the subordinate station include: a frame configuration index, a number of HARQ feedback channels included in the HARQ feedback area, and a size of each uplink subframe feedback area. The control station includes one or more of the following network elements: a macro control station, a micro control station, a pico control station, and a relay station; the subordinate station includes one or more of the following network elements: a terminal, a relay station, a control station, and a K control station. . The embodiment may further include: transmitting, by the control station, the resource allocation control information in the area after the closed loop power control area; and receiving the resource allocation control information in the area after the subordinate station is in the closed loop power control area. The area behind the closed loop power control area is preferably a resource allocation control area (such as a resource allocation area), and may be other suitable areas. In this embodiment, the control station is no longer required to use the system control signaling to explicitly notify the subordinate station, but the control station and the subordinate station respectively calculate the size of the closed loop power control area according to the system configuration parameters and the predetermined rules, thereby saving relevant System control overhead. Moreover, the corresponding information content of the two parties does not have a limitation on the size of the control signaling, and sufficient closed loop power control area size scenarios can be fully involved. Method Embodiment 2: FIG. 5 is a flowchart of a method for obtaining a size of a closed loop power control region according to Embodiment 2 of the method of the present invention. As shown in FIG. 5, the embodiment includes the following steps: Step S502: The control station and the subordinate station acquire system configuration parameters; wherein, the control station and the subordinate station acquire system configuration parameters, including: the control station directly reads the preset system configuration parameter. The subordinate station acquires system configuration parameters by receiving system information broadcast by the control station. Step S504, the control station and the subordinate station system configuration parameters and the predetermined rule acquire the number of assignable closed-loop power control information units included in each downlink subframe; wherein each downlink subframe includes an assignable closed-loop power control information unit The number refers to the maximum number of closed loop power control information units that each downlink subframe can allocate to the subordinate station, and is not greater than the number of closed loop power control information units actually included in each downlink subframe; Step S506, the control station and the subordinate station Assignable closed-loop power contained in each downlink subframe The number of control information units obtains the number of closed loop power control information units actually included in each downlink subframe; and in step S508, the control station and the subordinate station acquire the size of the closed loop power control region according to the number of closed loop power control information units actually included in each downlink subframe; Step S510: The control station sends the resource allocation control information in the area after the closed loop power control area; and the area in the subordinate station after the closed loop power control area receives the resource allocation control information. This embodiment is a specific implementation of the first embodiment of the method, and has all the beneficial effects of the first embodiment of the method, and is not repeated here. Method Embodiment 3: FIG. 6 is a flowchart of a method for obtaining a size of a closed loop power control region according to Embodiment 3 of the method of the present invention. As shown in FIG. 6, the embodiment includes the following steps: Step S602: The control station acquires system configuration parameters. Step S604: The control station acquires the assignable closed-loop power control information included in each downlink subframe according to the system configuration parameter and the predetermined rule. a number of units; in step S606, the control station acquires a closed loop power control information unit position corresponding to the subordinate station according to the number of assignable closed loop power control information units included in each downlink subframe and the fast feedback channel position information of the subordinate station; Step S608, The control station uses the closed loop power control information unit to carry the closed loop power control information of the subordinate station; in step S610, the subordinate station acquires the system configuration parameter; in step S612, the subordinate station obtains the data included in each downlink sub-frame according to the system configuration parameter and the predetermined rule. The number of the closed loop power control information units is allocated; Step S614, the subordinate station acquires the closed loop power control information of the corresponding subordinate station according to the number of assignable closed loop power control information units included in each downlink subframe and the fast feedback channel position information of the subordinate stations Unit position; step S616, the subordinate station from the closed loop power control letter Closed loop power control unit acquires information. In this embodiment, the control station and the subordinate station are also capable of passing system configuration parameters and predetermined calculation rules. Then, location information corresponding to the closed loop power control information unit of the designated subordinate station is further acquired. Through the above method, the system control overhead is further saved. Method Embodiment 4: This embodiment aims to provide a method for obtaining the size of a closed loop power control region, which is compatible with various configurations of a Wimax evolved system (IEEE 802.16m system). In addition, the closed loop power control region in this embodiment is specifically a PC A-MAP region. The method for obtaining the size of the closed loop power control region in this embodiment includes: the control station and the subordinate station acquire frame configuration index parameters to determine a system duplex mode, a downlink subframe number D, an uplink subframe number U, and each uplink subframe. The HARQ feedback area _statistic N _H — _Rgfl , _m , where w represents the uplink subframe index; in addition, the control station and the subordinate station continue to acquire the HARQ feedback channel number L _HFB parameter included in the HARQ feedback area, and each The size of the uplink subframe feedback area (UL_FEEDBACK SIZE, parameter. The control station and the subordinate station are based on the formula:

Q _m = Nft, *UL FEEOBACK SIZE -N _H . _Rgn , _m *L _HFB /N _Reuse , 0≤m≤Ul , obtain the number of FFBCHs Q _m respectively included in each uplink subframe, where each LRU contains feedback and a number of resources N _fl feedback resource capable of carrying the number of HARQ fBCH _e may be consistent with the current standard. Then, the control station and the subordinate station are based on the number of FFBCHs Q _m included in each known uplink subframe, based on the formula T = ceil ^s _j Q _m /D), N _PC = 2 *ceil(T/2) , 0 ≤ m ≤U1, respectively, determines the number of assignable PC A-MAP IEs T included in each downlink subframe, and the number of PC A-MAP IEs NPC actually included in each downlink subframe, and ceil represents an rounding operation. Finally, if it is assumed that the number of subcarriers occupied by each pair of PC A-MAP IEs is N _sc , then the PC A-MAP area i or size of each downlink subframe is N _sc * ( N _PC I2 ), that is, each downlink sub- The PC A-MAP area of the frame occupies Nsc* ( Npc/2 ) subcarrier resources. In addition, if it is assumed that the FFBCH location information corresponding to the subordinate station is specifically: a frame index, an uplink subframe index w in the frame, and an FFBCH index _{m in the} subframe, the above information can be confirmed. The index of the FFBCH in a frame range is specifically

Thus, the location information of the PC A-MAP IE corresponding to the subordinate station is: The frame index is +1, and the downlink subframe index in the frame is the PC A-MAP IE index in the /oor subframe is s mod T. The control station uses the determined PC A-MAP IE to carry the closed-loop power control information of the subordinate station and transmits it in the form of unicast; the subordinate station receives and parses the PC A-MAP IE of the determined location to obtain the closed loop power control information. In this embodiment, the control station includes one or more of the following network elements: a macro control station, a micro control station, a κ start control station, and a relay station; the subordinate station includes one or more of the following network elements: a terminal, Relay station, start control station, start control station. This embodiment is a specific implementation process of the first embodiment and the second embodiment of the method, and has all the beneficial effects of the first embodiment and the second embodiment, and is not repeated here. Method Embodiment 5: Table 2 is an example of a frame configuration index. The frame configuration index example involved in this embodiment may be as shown in Table 2, but is not limited thereto. Table 2 Frame Configuration Index Instance

Imagine that the frame configuration index Idx of the IEEE 802.16m system is set to 1, as shown in Table 2. At this time, the system works in TDD mode, the number of downlink subframes D is 5, and the number of uplink subframes is 3, three. The number of HARQ feedback regions included in the feedback region of the uplink subframe is N _H — _Rg „, 0, N _{H —} R _g n, i and Ν _{Η 2} are 2, 1 and 2, respectively; in addition, each HARQ feedback is envisaged. The area contains the HARQ feedback signal iMt L诵 is 12, and the feedback area size UL_FEEDBACK SIZE of each uplink subframe is based on the formula of 4 LRU control stations and subordinate stations:

Q _m = Nfl JL - FEEDBACK - SIZE - N _H - _Rgn , _M * LHFB / N _Re 0 < m < Ul = 2, and obtain the number of FFBCHs included in each of the three uplink subframes. QJ IQ ₂ , wherein the number of feedback resources Nfb included in each LRU and the number of HARQ FBCHs N _{Re that} a feedback resource can bear are consistent with the current standard (equal to 3 and 6 respectively). Specifically, Qo = 3*4-2*12/6=8;

Q ₂ = 3*4 -1*12/6=10;

Q ₂ = 3*4-2*12/6=8; Then, the control station and the subordinate station respectively include the FFBCH number Qo, ^ according to the known three uplink subframes, and based on the formula T=ceil ^s _j Q _m / D), N _PC =2*ceil(T/2) , 0≤m≤Ul=2, respectively determining the number of assignable PC A-MAP IEs T in each downlink subframe, and each downlink subframe Actually included PC A-MAPIE tN _PC , specifically,

T = ceil{{Q ₀ +Q ₁ +Q ₂ )/D)=ceil{{8+ 10+ 8)/ 5) = 6

At this time, the number of PC A-MAPIEs that can be allocated or actually available in each downlink subframe is equal to the actually existing PC A-MAPIE number N _PC . In fact, N _PC is equal to the minimum even number greater than or equal to T, because considering that the multi-antenna transmission mode of PC A-MAP is SFBC (Space Frequency Block Code), it is necessary to simultaneously use 2 different PC A-MAPs. The symbol is used as the input of SFBC, and the two different PC A-MAP symbols correspond to two different PC A-MAP IEs, so it must be ensured that each PC A-MAP IE has another PC A-MAP paired with it. IE, that is, the number of PC A-MAP IEs for each downlink subframe is always an even number. Finally, if it is assumed that the number of subcarriers occupied by each pair of PC A-MAP IEs is N _sc = 4, the PC A-MAP area i or size of each downlink subframe is

Nsc*( Npc/2 ) =4* ( 6/2 ) =12, that is, the PC A-MAP area of each downlink subframe occupies 12 subcarrier resources. Further, if the contemplated location information corresponding to the FFBCH subordinate station A specifically: frame index = 3, the uplink frame subframe index m = 2, and the subframe index FFBCH I q _m = 4, the above information can be determined by the The index of the FFBCH in a frame range is specifically

Thus, the location information of the PC A-MAP IE corresponding to the subordinate station A is: The frame index is +1=3+ 1=4, and the downlink subframe index in the frame is _/7oor (s/T) = floor (22 /6) =3, the PC A-MAP IE index in the subframe is s mod T=22 mod 6 = 4, and FIG. 7 is the FFBCH and PC A corresponding to the subordinate station A in the fifth embodiment of the method according to the present invention. - Schematic diagram of the MAP IE location, as shown in Figure 7. The control station uses the determined PC A-MAPIE (location: frame index is 4, downlink subframe index is

3, the PC A-MAP IE index in the sub-frame is 4) carrying the closed-loop power control information of the subordinate station A, and transmitting in the form of unicast; the subordinate station A receives and parses the PC A-MAP IE of the determined location to obtain Closed loop power control information. This embodiment is a specific implementation of the third embodiment of the method, and has all the beneficial effects of the foregoing embodiments, and is not repeatedly described herein. Method Embodiment 6: The frame configuration index shown in Table 2 will still be used in this embodiment. Imagine that the frame configuration index of the IEEE 802.16m system is set to 3, as shown in Table 2. At this time, the system works in TDD mode, the number of downlink subframes D is 3, the number of uplink subframes is 5, and five uplink subframes. The number of HARQ feedback areas N included in the feedback area. , N _H - _Rgn , i, N _H - _Rgn , N _H - _Rgn , and N are 0, 1, 1, 1 and 0, respectively. In addition, assume the number of HARQ feedback channels included in each HARQ feedback area. The L _HFB is 12, and the size of each uplink subframe feedback area (UL FEEDBACK SIZE is 4 LRUs. The control station and the subordinate station are based on the formula:

Q _m = Nfl JL - FEEDBACK - SIZE - N _H - _Rgn , _M * LHFB / N _Re , 0 ≤ m ≤ Ul = 4, and obtain the number of FFBCHs included in each of the five uplink subframes. , Qj, Q ₂ , Qs^) where the number of feedback resources Nfb included in each LRU and the number of HARQ FBCHs N _{Re that} a feedback resource can bear are consistent with the current standard (equal to 3 and 6 respectively). specific,

Qo = 3*4 -0*12/6=12;

Q ₂ = 3*4 -1*12/6=10;

Q ₂ = 3*4 -1*12/6=10; Q ₃ = 3*4-1*12/6=10;

Q ₄ = 3*4 -0*12/6=12; Then, the control station and the subordinate station respectively include the number of FFBCHs according to the known five uplink subframes.

Qo, Q ₂ , and ^ based formula

T=ceil ^s _j Q _m /D), N _PC =2*ceil(T/2) , 0≤m≤Ul=4, respectively determining the number of assignable PC A-MAP IEs included in each downlink subframe T, and the PC A-MAPIE tN _PC actually included in each downlink subframe, specifically,

T= ceil{{Q ₀ +Q ₁ +Q ₂ +Q3+Q4yD)=ceil{{12+ 10+ 10+ 10+ 12)/3)=18

NPC=2 *ceil(18/2)= 18; At this time, the number of PC A-MAP IEs that can be allocated or actually available in each downlink subframe is equal to the actually existing PC A-MAP IE number NPC; Indeed, N _PC is an even number T is less than the minimum, given the multi-antenna transmission mode is a PC A-MAP SFBC (Space Frequency Block Code, Space Frequency Block Coding), while two have different PC A-MAP The symbol is used as the input of SFBC, and the two different PC A-MAP symbols correspond to two different PC A-MAP IEs, so it must be ensured that each PC A-MAP IE has another PC A-MAP paired with it. IE, that is, the number of PC A-MAP IEs for each downlink subframe is always an even number. Finally, if it is assumed that the number of subcarriers occupied by each pair of PC A-MAP IEs is N _sc = 4, the PC A-MAP area i or size of each downlink subframe is

N _sc * ( Npc / 2 ) = 4 * ( 18/2 ) = 36, that is, the PC A-MAP area of each downlink subframe occupies 36 subcarrier resources. In addition, if it is assumed that the FFBCH location information corresponding to the subordinate station A is specifically: frame index = 3 intraframe uplink subframe index m = 3, and subframe FFBCH cable I q _m = 5, by the above information can Determining that the index of the FFBCH in a frame range is specifically

Thus, the location information of the PC A-MAP IE corresponding to the subordinate station A is: the frame index is +1=3+1=4, and the downlink subframe index in the frame is _/7oor (s/T) = floor (37). /18) =2, the PC A-MAP IE index in the sub-frame is s mod Γ=37 mod 18 = 1. FIG. 8 is a schematic diagram showing the positions of the FFBCH and PC A-MAP IE corresponding to the subordinate station A according to the sixth embodiment of the method according to the present invention, as shown in FIG. 8. The control station uses the determined PC A-MAP IE (location: frame index is 4, downlink subframe index is

2, the PC A-MAP IE index in the sub-frame is 1) carrying the closed-loop power control information of the subordinate station A, and transmitting in the form of unicast; the subordinate station A receives and parses the PC A-MAP IE of the determined location to obtain Closed loop power control information. It should be noted that the control station can periodically allocate a FFBCH to a subordinate station based on a specific period. Different subordinate stations can have different allocation periods, and the subordinate stations perform uplink feedback according to the above period, because FFBCH and PC A-MAP Yes - corresponding, so the control station will also perform periodic power control on the subordinate stations based on the period, that is, the fast feedback period of the subordinate station is equal to the power control period. Preferably, each PC-A-MAP IE includes 2 bits, and the corresponding power adjustment values are as shown in Table 3. For example, if the power adjustment value is ObOO, it will be interpreted as a subcarrier power or power density reduction of 0.5. dB (decibel, decibel). Table 3 - PC A-MAP IE format

This embodiment is a specific implementation of the third embodiment of the method, and has all the beneficial effects of the foregoing embodiments, and is not repeatedly described herein. System Implementation FIG. 9 is a schematic diagram of a system for acquiring the size of a closed loop power control region according to Embodiment 1 of the system of the present invention. As shown in FIG. 9, in this embodiment, the control station 902 and the subordinate station 904 each include: an obtaining module, configured to acquire system configuration parameters; and a closed loop power control area size obtaining module, configured to acquire according to system configuration parameters and predetermined rules. Closed loop power control area size. In this embodiment, the closed loop power control region size obtaining module may include: an assignable closed loop power control information unit number obtaining module, configured to acquire, according to system configuration parameters and a predetermined rule, an assignable closed loop power control included in each downlink subframe The number of information units; the actual closed loop power control information unit number obtaining module, configured to obtain the number of closed loop power control information units actually included in each downlink subframe according to the number of assignable closed loop power control information units included in each downlink subframe The closed loop power control area size obtaining module is configured to obtain a closed loop power control area size according to the number of closed loop power control information units actually included in each downlink subframe. In this embodiment, the control station may further include: a resource allocation control information sending module, configured to send resource allocation control information in a region behind the closed loop power control region; the subordinate station further includes: a resource allocation control information receiving module, configured to be in a closed loop The area behind the power control area receives resource allocation control information. Preferably, the area behind the closed loop power control area is a resource allocation control area. The method implemented in this embodiment can refer to the related descriptions of the first and second embodiments of the method, and has all the beneficial effects of the foregoing embodiments, and is not repeated in J3⁄4. System Embodiment 2: This embodiment will further explain the closed loop power control area size acquisition system based on the first embodiment of the system. Both the control station and the subordinate stations include: Closed loop power control information unit position acquisition module, for root Obtaining a closed loop power control information unit position corresponding to the subordinate station according to the number of assignable closed loop power control information units included in each downlink subframe and the fast feedback channel position information of the subordinate station; the control station further includes: And a sending module, configured to use the closed loop power control information unit to carry power adjustment information of the subordinate station; the subordinate station further includes: a subordinate station power adjustment information acquiring module, configured to obtain power adjustment information from the closed loop power control information unit. For the method implemented in this embodiment, refer to the related descriptions of the first and third embodiments of the method, and all the beneficial effects of the foregoing embodiments are not repeated herein. System Embodiment 3: In this embodiment, the system configuration parameters include: a frame configuration index, a number of HARQ feedback channels included in the hybrid automatic repeat request HARQ feedback area, and a size of each uplink subframe feedback area. The assignable closed loop power control information unit number obtaining module comprises: a HARQ feedback area number acquisition module, a fast feedback channel number acquisition module, and an assignable closed loop power control information unit number acquisition module.

The HARQ feedback area number obtaining module is configured to obtain, by using a frame configuration index, a number of HARQ feedback areas included in each uplink subframe, and preferably, based on a preset frame configuration index of the system and a number of HARQ feedback areas included in each uplink subframe. The mapping relationship acquires the number of HARQ feedback regions included in each uplink subframe. a fast feedback channel number obtaining module, configured to obtain, by each of the uplink subframes, a number of HARQ feedback regions, a number of HARQ feedback channels included in each HARQ feedback region, and a feedback region size of each uplink subframe to acquire each uplink subframe The number of fast feedback channels included, specifically, the number of fast feedback channels included in each uplink subframe is obtained by the following formula.

Q _m = Ν _β ^UL FEEDBACK SIZE -N _H . _Rgn , _m *L诵/N _Re where 0 _m represents the number of FFBCHs included in the wth uplink subframe; represents the number of feedback resources included in each logical resource unit; UL FEEDBACK SIZE indicates the size of each uplink subframe feedback region; Nn—Rgn, TM indicates the number of HARQ feedback regions included in the mth uplink subframe; L Peng indicates the number of HARQ feedback channels included in the HARQ feedback region; N indicates a feedback resource The number of HARQ feedback channels that can be carried. The assignable PC A-MAP IE number obtaining module is configured to obtain, by the number of fast feedback channels included in each uplink subframe, a number of closed loop power control information units included in each downlink subframe. Specifically, the number of closed loop power control information units included in each downlink subframe is obtained by the following formula. Where , denotes the number of assignable closed-loop power control information units included in each downlink subframe, and indicates the number of downlink subframes included in each frame, indicating the number of downlink subframes included in each frame, and ceii indicates an round-up operation. The actually included closed loop power control information unit number obtaining module is configured to obtain the number of closed loop power control information units actually included by using the following formula,

Np _C represents the number of closed-loop power control information units actually included in each downlink subframe; T represents the number of assignable closed-loop power control information units included in each downlink subframe, and ceil represents an round-up operation. The control station and the subordinate station each include: a closed loop power control information unit position obtaining module, configured to acquire position information of the closed loop power control information unit according to the following method: the fast feedback channel position information includes a frame index i, The uplink subframe index W and the intra-frame index q _m , the corresponding closed-loop power control information unit location information is frame index +1, the downlink subframe index floor s/T, and the closed-loop power control information unit index s mod in the subframe T, where,

+q _m , which represents the fast feedback channel index within a frame range. In this embodiment, the control station includes one or more of the following network elements: a macro control station, a start control station, a K start control station, and a relay station; and the subordinate station includes one or more of the following network elements: , relay station, start control station, start control station. The method implemented in this embodiment can refer to the related descriptions of the third to fifth embodiments of the method, and has all the beneficial effects of the foregoing embodiments, and is not repeated in J3⁄4. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. Perform the steps shown or described, or They are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for obtaining a size of a closed loop power control region, comprising:

The control station and the subordinate station obtain system configuration parameters;

The control station and the subordinate station acquire a closed loop power control region size according to the system configuration parameter and a predetermined rule.

The method according to claim 1, wherein the control station and the subordinate station acquire a closed loop power control region according to the system configuration parameter and a predetermined rule, where: the control station and the subordinate station Acquiring, according to the system configuration parameter and a predetermined rule, the number of assignable closed-loop power control information units included in each downlink subframe;

And the number of the allocateable closed loop power control information units included in each of the downlink subframes of the control station and the subordinate station acquires the number of closed loop power control information units actually included in each downlink subframe;

The number of closed loop power control information units actually included in each of the downlink subframes of the control station and the subordinate station acquires a closed loop power control region size.

The method according to claim 2, wherein the number of assignable closed-loop power control information units included in each downlink subframe refers to a maximum closed loop that each downlink subframe can allocate to a subordinate station. The number of power control information units is not greater than the number of closed loop power control information units actually included in each downlink subframe.

The method according to claim 1, wherein the acquiring the system configuration parameters by the control station and the subordinate station comprises:

The control station directly reads preset system configuration parameters,

The subordinate station acquires system configuration parameters by receiving system information broadcast by the control station.

The method according to claim 1, wherein after the acquiring the size of the closed loop power control area, the method further includes:

The control station transmits resource allocation control information in an area after the closed loop power control area; and the subordinate station receives resource allocation control information in an area after the closed loop power control area.

The method according to claim 2, wherein, after the obtaining the number of assignable closed-loop power control information units included in each downlink subframe, the method further includes:

And obtaining, by the control station and the subordinate station, the number of assignable closed-loop power control information units included in each downlink subframe and the fast feedback channel location information of the subordinate station, and acquiring closed-loop power control information corresponding to the subordinate station Unit position

The control station uses the closed loop power control information unit to carry closed loop power control information of the subordinate station; the subordinate station acquires the closed loop power control information from the closed loop power control information unit.

The method according to claim 2, wherein the system configuration parameter comprises: a frame configuration index, a hybrid automatic repeat request, a HARQ feedback channel, a HARQ feedback channel number, and a size of each uplink subframe feedback region.

The method according to claim 7, wherein the control station and the subordinate station acquire the number of assignable closed-loop power control information units included in each downlink subframe according to the system configuration parameter and the predetermined rule, including:

Acquiring, by the frame configuration index, the number of HARQ feedback regions included in each uplink subframe; the number of HARQ feedback regions included in the uplink subframes, the number of HARQ feedback channels included in the HARQ feedback region, and the size of each uplink subframe feedback region The number of fast feedback channels included in each uplink subframe;

Obtaining, by the number of fast feedback channels included in each uplink subframe, the number of assignable closed-loop power control information units included in each downlink subframe.

The method according to claim 8, wherein the obtaining, by the frame configuration index, the number of HARQ feedback regions included in each uplink subframe comprises:

The number of HARQ feedback regions included in each uplink subframe is obtained by using a mapping relationship between the frame configuration index of the system preset and the number of HARQ feedback regions included in each uplink subframe.

The method according to claim 9, wherein the number of HARQ feedback regions included in each uplink subframe, the number of HARQ feedback channels included in the HARQ feedback region, and the size of each uplink subframe feedback region are obtained. The number of fast feedback channels included in the uplink subframe includes:

Q _m = UL FEEDBACK SIZE—N _H — _Rg „, _m ^L _HFB IN _Reuse ; Wherein, the number of fast feedback channels included in the Wth uplink subframe is represented; the number of feedback resources included in each logical resource unit is represented; UL FEED BACK SIZE indicates the size of the feedback region of each uplink subframe; N _H — _Rg „, _m represents The number of HARQ feedback regions included in the wth uplink subframe; indicates the number of HARQ feedback channels included in the HARQ feedback region; and N _Re indicates the number of HARQ feedback channels that the feedback resources can carry.

11. The method of claim 10, wherein

Said =3, said N = 6

The method according to claim 10, wherein the obtaining the number of assignable closed-loop power control information units included in each downlink subframe by the number of fast feedback channels included in each uplink subframe comprises:

Τ = οειΙ(^ _η /Ό) where Γ denotes the number of assignable closed-loop power control information elements included in each downlink subframe, indicating the number of downlink subframes included in each frame, indicating the downlink subframes included in each frame The number, c«7, indicates the rounding operation.

The method according to claim 12, wherein the control station and the subordinate station acquire each downlink subframe according to the number of assignable closed-loop power control information units included in each downlink subframe The number of closed loop power control information units actually included includes:

N _PC represents the number of closed-loop power control information units actually included in each downlink subframe, and c«7 represents an upward rounding operation.

The method according to claim 6, wherein the control station and the subordinate station according to the number of assignable closed-loop power control information units included in each downlink subframe and the fastness of the subordinate station Feedback channel location information, obtaining a closed loop power control information unit location corresponding to the subordinate station includes:

The fast feedback channel location information comprises a frame index i, and an uplink subframe index subframe index m Q _m, a corresponding closed loop power control information unit location information frame index + 1, a downlink subframe index _ 7oor subframe index s od r, where Γ denotes the number of assignable closed-loop power control information units included in each downlink subframe, and s denotes a fast feedback channel index within a frame range.

15. The method of claim 14 wherein:

The number of fast feedback channels included in the _th uplink subframe is represented.

16. A system for obtaining a size of a closed loop power control region, comprising: a control station and a subordinate station, wherein:

The control station and the subordinate stations all include:

Get module for getting system configuration parameters /

The closed loop power control area size obtaining module is configured to obtain a closed loop power control area size according to the system configuration parameter and a predetermined rule.

The system according to claim 16, wherein, in the control station and the subordinate station, the closed loop power control area size obtaining module comprises:

An assignable closed-loop power control information unit number obtaining module, configured to acquire, according to the system configuration parameter and a predetermined rule, an assignable closed-loop power control information unit number included in each downlink subframe;

The actually included closed-loop power control information unit number obtaining module is configured to obtain, according to the number of assignable closed-loop power control information units included in each downlink subframe, the number of closed-loop power control information units actually included in each downlink subframe;

The closed loop power control region size obtaining module is configured to obtain a closed loop power control region size according to the number of closed loop power control information units actually included in each downlink subframe.

18. The system of claim 16 wherein:

The control station further includes: a resource allocation control information sending module, configured to send resource allocation control information in an area after the closed loop power control area;

The subordinate station further includes: a resource allocation control information receiving module, configured to receive resource allocation control information in an area after the closed loop power control area.

19. The system of claim 17 wherein:

The control station and the subordinate station each include: a closed loop power control information unit location acquiring module, configured to allocate, according to each of the downlink subframes, an assignable closed loop power control information list And the fast feedback channel position information of the subordinate station acquires a position of the closed loop power control information unit corresponding to the subordinate station;

The control station further includes: a control station power adjustment information sending module, configured to use the closed loop power control information unit to carry power adjustment information of the subordinate station;

The subordinate station further includes: a subordinate station power adjustment information acquiring module, configured to acquire the power adjustment information from the closed loop power control information unit.

The system configuration parameter according to claim 17, wherein the system configuration parameter comprises: a frame configuration index, a number of HARQ feedback channels included in the hybrid automatic repeat request HARQ feedback area, and a size of each uplink subframe feedback area; The assignable closed loop power control information unit number obtaining module includes:

a HARQ feedback area number obtaining module, configured to obtain, by using a frame configuration index, a number of HARQ feedback areas included in each uplink subframe;

a fast feedback channel number obtaining module, configured to obtain, by each of the uplink subframes, a number of HARQ feedback regions, a number of HARQ feedback channels included in each HARQ feedback region, and a feedback region size of each uplink subframe to acquire each uplink subframe The number of fast feedback channels included; the number of available closed loop power control information unit acquisition modules, configured to obtain, by the number of fast feedback channels included in each uplink subframe, an assignable closed loop power control information unit included in each downlink subframe number.

21. The system of claim 20, wherein:

a fast feedback channel number obtaining module, configured to obtain a fast feedback channel included in each uplink subframe by using the following formula,

Q _m = UL FEEDBACK SIZE—N _H — _Rg „, _m *L _HFB IN _Re

Wherein, indicating the number of fast feedback channels included in the wth uplink subframe; indicating the number of feedback resources included in each logical resource unit; UL FEED BACK_SIZE is the feedback region size of each L row subframe; N _H — _Rg „, _m represents the number of HARQ feedback regions included in the mth uplink subframe; L诵 represents the number of HARQ feedback channels included in the HARQ feedback region; N3⁄4^ _e represents the number of HARQ feedback channels that a feedback resource can carry.

22. The system of claim 21, wherein

The assignable closed-loop power control information unit number obtaining module is configured to obtain, by using the following formula, the number of assignable closed-loop power control information units included in each downlink subframe,

Γ indicates the number of assignable closed-loop power control information units included in each downlink subframe, indicating the number of downlink subframes included in each frame, indicating the number of downlink subframes included in each frame, and c«7 indicates rounding up. operating.

The system according to claim 22, wherein the actually included closed loop power control information unit number obtaining module is configured to obtain the number of closed loop power control information units actually included by using the following formula,

N _PC = 2*ceil(T/2) ,

24. The system of claim 19, wherein

a closed loop power control information unit position obtaining module, configured to: obtain position information of the closed loop power control information unit according to the following method,

The fast feedback channel location information includes a frame index i, an uplink subframe index m, and a sub-frame index q _m , and the corresponding closed-loop power control information unit location information is a frame index + 1 , and a downlink subframe index _ 7oor a sub-frame index s od r, where Γ denotes the number of assignable closed-loop power control information units included in each downlink subframe, and s denotes a fast feedback channel index within a frame range.

25. The system of any of claims 16-24,

The control station includes one or more of the following network elements: a macro control station, a start control station, a start control station, and a relay station;

The subordinate station includes one or more of the following network elements: a terminal, a relay station, a control station, and a control station.