CN103916867A - Method and apparatus for determining capacity of control channel - Google Patents
Method and apparatus for determining capacity of control channel Download PDFInfo
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Abstract
The invention discloses a method and apparatus for determining the capacity of a control channel. The method mainly comprises determining system parameters of a target cell in a time division long term evolution (TD-LTE) system and network construction demand parameters; determining channel parameters of the control channel according to the network construction demand parameters and the system parameters; determining channel resources occupied by the control channel according to the determined system parameters and the determined channel parameters of the control channel; and determining the channel capacity of the control channel according to the determined channel resources occupied by the control channel. Through the scheme of the embodiment of the invention, the characteristics of the capacity of the control channel is analyzed by combining the system parameters of the target cell in the TD-LTE system and the network construction demand parameters, the estimating method of the capacity of the control channel is given, and a theoretical basis is provided for actual TD-LTE network planning and network parameter configuration, making possible the balance between the control channel resource allocation and traffic channel resource allocation in the resource allocation of an actual network.
Description
Technical field
The present invention relates to mobile communication technology field, relate in particular to a kind of method and apparatus of definite control channel capacity.
Background technology
Long evolving system (Long Term Evolution, LTE) by adopting OFDM access (Orthogonal Frequency Division Multiple Access, and single carrier frequency division multiple access access (Single-carrier Frequency-Division Multiple Access OFDMA), and multiple-input and multiple-output (Multi Input Multi Output SC-FDMA), etc. MIMO) multiple key technology can realize than current 2G/3G system data rate faster, higher cell capacity is provided, and significantly reduce the time delay of user plane and control plane.Because time division duplex long evolving system (Long Term Evolution – Time Division Duplexing, the TD-LTE) availability of frequency spectrum is high, its networking planning also more and more causes concern.In networking planning, covering and channel capacity are two needs the problems of paying close attention to especially.
For TD-LTE channel capacity, it comprises traffic channel capacity and control channel capacity, in prior art, mainly the traffic channel capacity of TD-LTE is estimated, as above downlink throughput capacity estimation scheme etc., and in the wireless network resource configuration of TD-LTE is adjusted, to meet traffic carrying capacity carrying demand as target, according to the estimation result to traffic channel capacity, the networking scale of TD-LTE is estimated, thisly only consider traffic channel capacity and ignore the technical scheme of the impact of control channel capacity on Network resource allocation, in real network, can cause control channel resource distribution and traffic channel resource configuration uneven, but, estimation for the control channel capacity of TD-LTE in prior art does not also provide suitable settling mode.
Summary of the invention
The embodiment of the present invention provides a kind of method and apparatus of definite control channel capacity, to realize the estimation of control channel capacity of the Target cell to TD-LTE system.
A method for definite control channel capacity, described method comprises:
Determine system parameters and the networking demand parameter of the Target cell of time division duplex Long Term Evolution TD-LTE system;
According to networking demand parameter and system parameters, determine the channel parameter of control channel;
According to the channel parameter of definite system parameters and definite control channel, determine the channel resource that control channel takies;
The channel resource taking according to definite control channel, determines the channel capacity of control channel.
A device for definite control channel capacity, described device comprises:
System parameters determination module, for determining system parameters and the networking demand parameter of Target cell of time division duplex Long Term Evolution TD-LTE system;
Channel parameter determination module, for according to networking demand parameter and system parameters, determines the channel parameter of control channel;
Channel resource determination module, for according to the channel parameter of definite system parameters and definite control channel, determines the channel resource that control channel takies;
Channel capacity determination module, for the channel resource taking according to definite control channel, determines the channel capacity of control channel.
By the scheme of the embodiment of the present invention, in conjunction with system parameters and the networking demand parameter of the Target cell of TD-LTE system, capacity characteristic to control channel is analyzed, provide control channel and held method for determination of amount, for the configuration of the actual TD-LTE network planning and network parameter provides theoretical foundation, making in the resource distribution of real network control channel resource distribution configure balance with traffic channel resource becomes possibility.
Brief description of the drawings
Figure 1 shows that the TD-LTE system resource in the embodiment of the present invention takies and volume calculation flow chart;
Figure 2 shows that the method flow diagram of determining control channel capacity in the embodiment of the present invention one;
Figure 3 shows that the method flow diagram of determining the channel capacity of PRACH in the embodiment of the present invention two;
Figure 4 shows that the method flow diagram of determining the channel capacity of PUCCH in the embodiment of the present invention three;
Figure 5 shows that the method flow diagram of determining the channel capacity of PHICH in the embodiment of the present invention four;
Figure 6 shows that the method flow diagram of determining the channel capacity of PDCCH in the embodiment of the present invention five;
Fig. 7 is the structural representation of determining the device of control channel capacity in the embodiment of the present invention six.
Embodiment
TD-LTE power system capacity estimation process is divided into two parts: volume calculation basic parameter determine and resource occupation and volume calculation process, as shown in Figure 1.Wherein basic parameter comprises system configuration parameter, the requirement of data service quality index, and VoIP operation quality requirement and operation code modulation system are selected.Determining on the basis of relevant parameter, can determine the capacity of control channel and traffic channel capacity.Definite method mainly for the channel capacity of the control channel for carrying upstream control signaling or descending control signaling in the embodiment of the present invention describes.
Below in conjunction with Figure of description, embodiments of the present invention is further illustrated, but the present invention is not limited to the following examples.
As shown in Figure 2, be the method for the definite control channel capacity in the embodiment of the present invention, said method comprising the steps of:
Step 101: system parameters and the networking demand parameter of determining the Target cell of time division duplex Long Term Evolution TD-LTE system.
Described system parameters comprises: system bandwidth, uplink and downlink timeslot proportioning, special time slot proportioning, ascending-descending subframes configuration, antenna configuration etc.; Described networking demand parameter comprises: the target scene under community, maximum covering radius, the number of users of community etc. of community.Target scene comprises: urban district, suburb, city focus etc.
Step 102: according to networking demand parameter and system parameters, determine the channel parameter of control channel.
The channel parameter of described control channel comprises form, the configuration density of control channel etc. of the information of form, the control channel carrying of control channel.
Step 103: according to the channel parameter of definite system parameters and definite control channel, determine the channel resource that control channel takies.
Step 104: the channel resource taking according to definite control channel, determine the channel capacity of control channel.
In TD-LTE system, control channel, from large aspect classification, is divided into ascending control channel and down control channel.Ascending control channel comprises: Random Access Channel (PRACH), ascending control channel PUCCH etc.; Down control channel comprises: physical hybrid automatic repeat request indicator channel PHICH, physical downlink control channel PDCCH, Physical Broadcast Channel PBCH, major-minor synchronizing channel P/S-SCH, Physical Control Format Indicator Channel PCFICH, reference signal etc.
Because the object of determining in actual applications the channel capacity of control channel is for determining schedulable number of users (being also cell capacity), for networking scale provides theoretical foundation, and due to PBCH, P/S-SCH and reference signal be community be useful on all need accept, and the time-frequency domain position of these channels is fixed, do not affect cell capacity, same PCFICH is used to indicate the OFDM symbolic number that this subframe PDCCH takies, all use needs to accept per family, do not affect cell capacity yet, therefore, the embodiment of the present invention is mainly for the PRACH that affects cell capacity, PUCCH, the channel capacity of PHICH and PDCCH, if determine the above-mentioned channel capacity not changing because of the change of user's scale, still can utilize the scheme of above-mentioned definite control channel capacity to determine, below in above-mentioned steps 101 to the basis of step 104, by the following examples respectively to determine PRACH, PUCCH, the method of the channel capacity of PHICH and PDCCH describes.
For PRACH; it is a shared channel; it can be arranged in the UpPTS of special time slot; also can be positioned at conventional ascending time slot, in initial access process, the random access burst of carrying Client-initiated; to obtain the uplink synchronous of terminal; its basic structure comprises Cyclic Prefix for carrying out frequency domain detection, forms for the protection interval GT that initiates the random targeting signal of random access and come and go propagation delay for adjusting, and determines the method for its channel capacity as shown in Figure 3, comprises the following steps:
Step 201: system bandwidth, CP type, uplink and downlink timeslot proportioning, the special subframe proportioning of determining Target cell.
Step 202: determine the affiliated target scene of Target cell, the maximum covering radius of Target cell.
Above-mentioned steps 201 and step 202 for need to determine be PRACH channel time to concrete definite TD-LTE system parameters and networking demand parameter in the step 101 in embodiment mono-.
Step 203: determine channel format, parameter and the channel configuration of PRACH according to the system bandwidth of definite Target cell, CP type, uplink and downlink timeslot proportioning, special subframe proportioning, the affiliated target scene of Target cell, the maximum covering radius of Target cell;
Concrete, channel format, parameter and the channel configuration of definite PRACH comprise:
Cyclic Prefix duration T in PRACH
cP, random targeting signal duration T
sEQ, protection interval duration T
gTchannel configuration density D with PRACH
rA.
Wherein, the number of users that community is supported and PRACH channel format determine the channel configuration density D of PRACH
rA.
Step 204: determine ZC root sequence quantity and ZC-ZCZ sequence quantity according to the maximum covering radius of the affiliated target scene of Target cell, Target cell.
Above-mentioned steps 203 and step 204 are further illustrating step 102.
Step 205: according to the described D determining
rA, random leading quantity and the radio frames of each second determine the channel resource that PRACH takies.
In this step 205, be specially D
rA, random leading quantity and multiplying each other of the radio frames three of each second can obtain the channel resource that each second, PRACH took.Because a radio frames in TD-LTE system is 10ms, therefore, the quantity of middle radio frames per second is fixed, and is 100.
Above-mentioned steps 205 is further illustrating step 103.
Step 206: determine and set the successful access number of times that under the channel resource that collision probability index and definite PRACH take, kind per second can be supported meeting.
For PRACH, its channel capacity is sets the successful access number of times that under the channel resource that collision probability index and definite PRACH take, kind per second can be supported meeting.
Specifically utilize formula (1) to determine the channel capacity of PRACH:
G=L×Ln[1/(1-P
cell UE)] （1）
Wherein, the channel capacity that G is PRACH, L is the channel resource number that definite PRACH takies, P
cell uEfor the collision probability index of setting.
Common, described P
cell uEget 0.01.
Below by a concrete example to above-mentioned for PRACH, determine that the scheme of control channel capacity describes.
Suppose that the maximum covering radius in community is less than 1km, in definite table (1), sequence number 1, to the system parameters shown in the row at sequence number 5 places, can determine that its form is Format4, in Format4 form, and T
cPvalue, T
sEQvalue, T
gTvalue is respectively as shown (1) middle sequence number 9 to as shown in the row at sequence number 11 places.
| Sequence number | Parameter name | Parameter configuration | Remarks |
| 1 | System bandwidth | 20MHz | |
| 2 | CP type | Common | |
| 3 | Time slot proportion | 1 | |
| 4 | Special subframe proportioning | 10：2：2 | |
| 5 | Intend covering maximum radius | <1km | Key parameter |
| 6 | ZC root sequence quantity | 1 | |
| 7 | ZC-ZCZ sequence quantity | 64 | Key parameter |
| 8 | Random access burst form | Format4 | |
| 9 | T CPValue | 488T S | |
| 10 | T SEQValue | 4096T S | |
| 11 | T GTValue | 288T S | |
| 12 | D RA | 2/ radio frames | Key parameter |
Table (1) cell system parameter and PRACH channel parameter table
At table under the channel parameter shown in (1), the channel resource that can determine PRACH channel occupancy is counted L and is: ZC-ZCZ sequence quantity × D
rAquantity=64 × 2 × the 100=12800 of × middle radio frames per second.Therefore, at P
cell uEget 0.01 o'clock, the channel capacity G that utilizes formula (1) can calculate PRACH is 128, therefore, in the time meeting setting collision probability index 0.01, the successful access number of times 128 that Target cell kind per second can be supported, that is to say, this community can support 128 users successfully to carry out random burst access each second simultaneously.
Equally, under different system parameterss and network demand parameter, also can utilize the channel capacity of determining corresponding PRACH in the embodiment of the present invention for definite method of PRACH channel capacity, suppose to a certain definite target scene different radius of society, root ZC sequence number number and ZC-ZCZ sequence number and D
rAas shown in table (2), the corresponding PRACH channel capacity G determining is as shown in last row in table (2).
The channel capacity of PRACH under table (2) different parameters
By above computational process, obtain the channel capacity of the PRACH under different covering radiuss and under system parameters condition.But, the channel capacity of PRACH is not network planning configuration limited resource, can meet varying number user access demand by adjusting channel configuration density.
For PUCCH, in TD-LTE system, in order to ensure up single-carrier property, user is in the sub-frame of uplink that does not have PUSCH to transmit, utilize the PUCCH transmission ascending control information relevant to this user's downlink data, these information comprise semi-static ACK/NACK, dynamic ack/NACK, CQI/PMI/RI and SRI.PUCCH channel takies the physical resource of 1 RB on time-frequency domain, adopts the mode of time slot frequency hopping, transmits on the both sides of upstream band, determines the method for its channel capacity as shown in Figure 4, comprises the following steps:
Step 301: system bandwidth, CP type and the uplink and downlink timeslot proportioning of determining Target cell;
Step 302: determine the affiliated target scene of Target cell, the maximum covering radius of Target cell.
Above-mentioned steps 301 and step 302 are further illustrating step 101.
Step 303: determine that according to the maximum covering radius of the affiliated target scene of system bandwidth, cyclic prefix CP type and uplink and downlink timeslot proportioning, Target cell, Target cell the Resource Block RB of single sub-frame PUCCH configures, form, the report cycle of ascending control information and the transmission format parameters of PUCCH of the ascending control information of PUCCH carrying.
This step 303 is further illustrating step 102.
Step 304: the RB configurable number of determining PUCCH in described report cycle according to the report cycle of the RB configuration of bandwidth, uplink and downlink timeslot proportioning, single sub-frame PUCCH and ascending control information;
Concrete, the RB configurable number of product PUCCH in report cycle that number of sub frames that can be in report cycle and the RB of single sub-frame PUCCH configure.
Step 305: the channel resource number of determining the PUCCH of every RB support according to the form of the transmission format parameters of PUCCH and ascending control information.
PUCCH exists multiple transformat to support the transmission of different ascending control informations, the number of resources difference of the control channel that the RB of different transpost formats can carry.
Above-mentioned steps 303 and step 305 are further illustrating step 103.
Step 306: according to the channel resource number of the PUCCH of the RB configuration of PUCCH in report cycle and every RB support, determine the channel capacity of PUCCH.
Above-mentioned steps 306 is further illustrating step 104.
Concrete, the channel resource number of the PUCCH that the described configuration of the RB according to PUCCH in report cycle and every RB support, determines the channel resource that PUCCH takies, and comprising:
The channel resource number of the PUCCH supporting according to every RB and the code channel number that the every RB of ascending control information can carry are determined the channel resource configurable number of ascending control information;
Concrete, the channel resource number of PUCCH that every RB can be supported and the product of the code channel number that the every RB of ascending control information can carry are as the channel resource configurable number of determining ascending control information.
According to the channel resource configurable number of the RB configurable number of PUCCH in report cycle and ascending control information, determine the channel capacity of PUCCH.
Concrete, can be in report cycle the product of the RB configurable number of PUCCH and the channel resource configurable number of ascending control information as the channel capacity of PUCCH.
Below by a concrete example, determine that to the present invention is directed to PUCCH the scheme of channel capacity describes.
Suppose that definite system parameters is for sequence number 1 in table (3) is to the parameter shown in the row at sequence number 3 places, the Resource Block RB of definite single sub-frame PUCCH configuration is as shown in the row at table (3) sequence number 4 places, the report cycle of the ascending control information under the transmission format parameters of PUCCH is as shown in table (4), according to the every RB of the control information in table 5 can carry the definite configuration of code channel number to the number of resources (being code channel number) of the every RB control channel of control information in table (3) sequence number 4 to the parameter as shown in the row at sequence number 7 places, the channel capacity of final each control information of determining in different report cycles is as table (6), shown in table (7) and table (8).
The configuration of table (3) canonical system and control channel resource distribution
| Sequence number | Ascending control information (UCI) | Report cycle (ms) |
| 1 | CQI/PMI/RI | {1,5,10,20,40,80,160} |
| 2 | Semi-static ACK/NACK | {20} |
| 3 | Dynamic ack/NACK | - |
| 4 | SRI | {5,10,20,40,80} |
Table (4) PUCCH channel bearing control information report cycle
| Sequence number | Ascending control information (UCI) | Every RB can carry code channel number |
| 1 | CQI/PMI/RI | {4、6、12} |
| 2 | Semi-static ACK/NACK | {12、18、36} |
| 3 | Dynamic ack/NACK | {12、18、36} |
| 4 | SRI | {12、18、36} |
The every RB of table (5) control information can carry code channel number
Table (6) different report cycle CQI/PMI/RI channel capacity
Table (7) different report cycle SRI channel capacity
The semi-static ACK/NACK channel capacity of table (8) different report cycles
In addition, the number of users that the number of dynamic ack/NACK channel can be dispatched to synchronization is simultaneously relevant, is underrange.In real system, the various report cycles of CQI/PMI/RI, SRI information all may occur, and the RB number of PUCCH channel allocation also can change according to number of users, and therefore, PUCCH capacity also can change with the adjustment of resource distribution.
For PHICH, its carrying be that the HARQ of the PUSCH channel of 1 bit replys (ACK/NACK replys) information.UE determines whether carry out the re-transmission of packet according to this response message, and the bit that the bit of ACK is 1, NACK is 0.PHICH resource is made up of PHICH, and a PHICH group takies 3 REG, distinguishes the PHICH of different user in PHICH group with orthogonal spreading sequence Walsh code.The PHICH group number that can obtain in Yi Ge community has determined the number of users that can support.For conventional CP, 1 PHICH group can be carried 8 users' ACK information; For expansion CP, 1 PHICH group can be carried 4 users' ACK information.The symbol lengths of PHICH resource occupation is indicated in PBCH, uses the length of 1bit instruction PHICH in PBCH, the frequency domain resource that 2bit instruction PHICH uses.
In TD-LTE system, due to the ascending-descending subframes number difference under different TDD sub-frame configuration, may there is the situation that the ACK feedback information of sub-frame of uplink transmits on same descending sub frame, therefore under TD-LTE system, the PHICH of different subframes group number changes, relevant with the amount of needs feedback, determine the method for PHICH channel capacity as shown in Figure 5, comprise the following steps:
Step 401: downlink system bandwidth, CP type, the ascending-descending subframes configuration format of determining the Target cell of TD-LTE system;
Step 402: the affiliated target scene and the number of users of carrying out transmitting uplink data of determining Target cell.
Above-mentioned steps 401 and step 402 are illustrating step 101.
Step 403: according to the affiliated target scene of Target cell and the number of users of carrying out transmitting uplink data determine the broadcast of PBCH channel for representing the parameter N g of the RB number that a process takies;
When carrying out the number of users of transmitting uplink data and packet when more, definite Ng value is larger.
Step 404: determine the Coefficient m i corresponding with each descending sub frame according to the downlink system bandwidth of Target cell, ascending-descending subframes configuration, this Coefficient m i represents that the ACK/NACK informational needs of sub-frame of uplink is at the feedback quantity of descending sub frame transmission.
Concrete, the span of mi is that { 0,1,2} can be determined by following table (9).
Table (9)
Above-mentioned steps 403 and step 404 are illustrating step 102.
Step 405: the number of determining the Resource Block RB of downlink bandwidth support according to downlink system bandwidth;
Step 406: according to definite m
i, N
gwith the number of Resource Block RB that downlink bandwidth is supported, determine the PHICH group number of each descending sub frame in a radio frames.
Concrete, the PHICH group number of each descending sub frame
available following formula (a) or formula (b) represent:
Wherein, formula (a) is useful under conventional CP, and formula (b) is useful under expansion CP,
represent the RB number that downlink bandwidth is supported.
Above-mentioned steps 405 and step 406 are illustrating step 103.
Step 407: according to the number of the PHICH group that in CP type and a definite radio frames, each descending sub frame can carry, determine the channel capacity of PHICH.
For conventional CP, 1 PHICH group can be carried 8 users' ACK information; For expansion CP, 1 PHICH group can be carried 4 users' ACK information.That is to say, be multiplied by 4 or be multiplied by 8 and can obtain supported number of users by several definite PHICH group according to CP type, is also the channel capacity of PHICH.
This step 406 is illustrating step 104.
Below by a concrete example to above-mentioned for PHICH, determine that the scheme of control channel capacity describes.
Here be set under conventional CP 10M and 20M system bandwidth, sub-frame configuration form 1(time slot proportion 1(2:1:2)) and sub-frame configuration form 2(time slot proportion 2(3:1:1)), and different Ng when configuration, the PHICH channel number that can support.As shown in table (10):
Table (10)
For PDCCH, its Main Function is bearing downlink control information (Down Control Information, DCI), mainly comprises upstream dispatching instructions, downlink data transmission instruction, common control information etc.Transmission, power control and 1/ layer of 2 signaling of most of layer of the running time-frequency resource of responsible uplink downlink and MCS distribution, ACK/NACK information, these information can form various control information format.Analyze the capacity of PDCCH channel, have very large relation with the chain of command index while dispatched users number of LTE capacity analysis.So-called dispatched users number simultaneously, the schedulable number of users of the every Transmission Time Interval TTI of the system that refers to, is mainly determined by PDCCH control channel resource.And the base unit of PDCCH resource mapping is CCE, CCE comprises 9 continuous REG, and a REG comprises again 4 RE.1 PDCCH comprises several CCE.PDCCH has 4 kinds of forms, and corresponding CCE number is 1,2,4,8.Its channel capacity determines that method as shown in Figure 6, comprises the following steps:
Step 501: system bandwidth, cyclic prefix CP type, ascending-descending subframes configuration, special subframe configuration and the antenna configuration of determining the Target cell of TD-LTE system.
Step 502: determine the affiliated target scene of Target cell, the maximum covering radius of Target cell.
Above-mentioned steps 501 and step 502 are illustrating step 101.
Step 503: the channel format of determining PDCCH according to the system bandwidth of Target cell, cyclic prefix CP type, ascending-descending subframes configuration, special subframe configuration, antenna configuration, the affiliated target scene of Target cell and the maximum covering radius of Target cell.
This step 503 is illustrating step 102.
Step 504: determine each descending sub frame control domain total resources number according to the control domain size of the system bandwidth of Target cell, cyclic prefix CP type, ascending-descending subframes configuration, special subframe configuration, the channel format of PDCCH and the instruction of the channel information of Physical Control Format Indicator Channel PCFICH.
Step 505: determine the number of resources that the non-PDCCH of control domain takies.
Step 506: according to each descending sub frame control domain total resources number of determining, the number of resources that the non-PDCCH of control domain takies, determine the channel resource that in each descending sub frame, PUCCH takies.
Concrete, in this step 506, descending sub frame control domain total resources number is deducted to the number of resources that the non-PDCCH of control domain takies and obtain the channel resource that in this descending sub frame, PUCCH takies.
Above-mentioned steps 504 to step 506 is illustrating step 103.
Concrete, the number of resources that the non-PDCCH of described definite control domain takies comprises:
The first step: determine that PCFICH takies the number of resources of control domain.
Second step: configuration determines that downlink reference signal takies the number of resources of control domain according to antenna port.
The 3rd step: determine that physical hybrid automatic repeat request indicator channel PHIICH takies the number of resources of control domain.
Step 507: the channel resource taking according to PDCCH polymerization grade and definite PDCCH, determine the channel capacity of PDCCH.
This step 507 is illustrating step 104.
Described PDCCH polymerization classification user of N PDCCH dispatch channel resource;
Described according to the channel resource of PDCCH polymerization grade and definite PDCCH, determine the channel capacity of PDCCH, be specially:
The result that the channel resource that definite PDCCH is taken and described N are divided by is as the channel capacity of PDCCH.
Below by a concrete example to above-mentioned for PDCCH, determine that the scheme of control channel capacity describes.
Suppose that definite relevant parameter is:
System bandwidth: 10/20M; CP configuration: conventional CP; Conventional sub-frame configuration: 2:1:2/3:1:1.
Special subframe configuration: 10:2:2; Antenna port number: 2; PHICH channel parameter: Ng=1/6.
PCFICH channel parameter: conventional subframe control domain 3OFDM symbol, special subframe 1OFDM symbol; PDCCH polymerization grade 0.
Show that according to above-mentioned parameter the channel capacity of determining PDCCH is as shown in table (11):
Table (11)
As shown in Figure 7, be the structural representation of the determining device of the channel capacity in the embodiment of the present invention, comprising: system parameters determination module 31, channel parameter determination module 32, channel resource determination module 33 and channel capacity determination module 34, wherein:
System parameters determination module 31, for determining system parameters and the networking demand parameter of Target cell of TD-LTE system;
Channel parameter determination module 32, for according to networking demand parameter and system parameters, determines the channel parameter of control channel;
Channel resource determination module 33, for according to the channel parameter of definite system parameters and definite control channel, determines the channel resource that control channel takies;
Channel capacity determination module 34, for the channel resource taking according to definite control channel, determines the channel capacity of control channel.
Preferably, described control channel comprises: PRACH, PUCCH, PHICH and PDCCH.
Described system parameters determination module 31, specifically for for PRACH, determine system bandwidth, CP type, uplink and downlink timeslot proportioning, special subframe proportioning, the affiliated target scene of determining Target cell and the maximum covering radius of Target cell of the Target cell of TD-LTE system.
Described channel parameter determination module 32, specifically for for PRACH, according to determine Target cell system bandwidth, CP type, uplink and downlink timeslot proportioning, special subframe proportioning, the affiliated target scene of Target cell, the maximum covering radius of Target cell determine channel format, parameter and the channel configuration of PRACH; And determine ZC root sequence quantity and ZC-ZCZ sequence quantity according to the maximum covering radius of the affiliated target scene of Target cell, Target cell.
Preferably, described channel parameter determination module 32, specifically for the Cyclic Prefix duration T in PRACH
cP, targeting signal duration T
sEQ, protection interval duration T
gTchannel configuration density D with PRACH
rA.
Channel resource determination module 33, specifically for for PRACH, according to the described D determining
rA, random leading quantity and the radio frames of each second determine the channel resource that PRACH takies.
Channel capacity determination module 34, specifically for for PRACH, determines and sets the successful access number of times that under the channel resource that collision probability index and definite PRACH take, kind per second can be supported meeting.
Preferably, channel capacity determination module 34, specifically for utilizing G=L × Ln[1/ (1-P
cell uE)] determine the channel capacity of PRACH, wherein, the channel capacity that G is PRACH, L is the channel resource number that definite PRACH takies, P
cell uEfor the collision probability index of setting.
Described system parameters determination module 31, specifically for for PUCCH, determines system parameters, cyclic prefix CP type and the uplink and downlink timeslot proportioning of the Target cell of TD-LTE system; And the affiliated target scene of definite Target cell, the maximum covering radius of Target cell.
Described channel parameter determination module 32, specifically for for PUCCH, determine that according to the maximum covering radius of the affiliated target scene of system bandwidth, cyclic prefix CP type and uplink and downlink timeslot proportioning, Target cell, Target cell the Resource Block RB of single sub-frame PUCCH configures, form, the report cycle of ascending control information and the transmission format parameters of PUCCH of the ascending control information of PUCCH carrying.
Preferably, described channel parameter determination module 32, specifically for for PUCCH, determine the RB configurable number of PUCCH in described report cycle according to the report cycle of the RB configuration of system bandwidth, uplink and downlink timeslot proportioning, single sub-frame PUCCH and ascending control information, and determine the channel resource number of the PUCCH of every RB support according to the form of the transmission format parameters of PUCCH and ascending control information.
Described channel capacity determination module 34, specifically for for PUCCH, according to the channel resource number of the PUCCH of the RB configuration of PUCCH in report cycle and every RB support, determines the channel capacity of PUCCH.
Described channel capacity determination module 34, specifically for for PUCCH, the channel resource number of the PUCCH supporting according to every RB and the code channel number that the every RB of ascending control information can carry are determined the channel resource configurable number of ascending control information; And according to the channel resource configurable number of the RB configurable number of PUCCH in report cycle and ascending control information, determine the channel capacity of PUCCH.
Described system parameters determination module 31, specifically for for PHICH, determines downlink system bandwidth, CP type, the ascending-descending subframes configuration format of the Target cell of TD-LTE system; And the affiliated target scene of definite Target cell and the number of users of carrying out transmitting uplink data.
Described channel parameter determination module 32, specifically for determine according to the affiliated target scene of Target cell and the number of users of carrying out transmitting uplink data the broadcast of PBCH channel for representing the parameter N of the RB number that a process takies
g; And determining the Coefficient m i corresponding with each descending sub frame according to the downlink system bandwidth of the TD-LTE system of Target cell, ascending-descending subframes configuration, this Coefficient m i represents that the ACK/NACK informational needs of sub-frame of uplink is at the feedback quantity of descending sub frame transmission.
Channel resource determination module 33, specifically for the number of Resource Block RB of determining that according to downlink system bandwidth downlink bandwidth is supported, and according to definite m
i, N
gwith the number of Resource Block RB that downlink bandwidth is supported, determine the PHICH group number of each descending sub frame in a radio frames.
Channel capacity determination module 34, specifically for according to the number of the PHICH group that in CP type and a definite radio frames, each descending sub frame can carry, determines the channel capacity of PHICH.
System parameters determination module 31, specifically for for PDCCH, determines system bandwidth, CP type, ascending-descending subframes configuration, special subframe configuration and the antenna configuration of the Target cell of TD-LTE system;
Determine the affiliated target scene of Target cell, the maximum covering radius of Target cell.
Channel parameter determination module 32, specifically for for PDCCH, determine the channel format of PDCCH according to the system bandwidth of Target cell, cyclic prefix CP type, ascending-descending subframes configuration, special subframe configuration, antenna configuration, the affiliated target scene of Target cell and the maximum covering radius of Target cell.
Channel resource determination module 33, specifically for for PDCCH, determine each descending sub frame control domain total resources number according to the control domain size of the system bandwidth of Target cell, cyclic prefix CP type, ascending-descending subframes configuration, special subframe configuration, the channel format of PDCCH and the instruction of the channel information of Physical Control Format Indicator Channel PCFICH, determine the number of resources that the non-PDCCH of control domain takies, according to each descending sub frame control domain total resources number of determining, the number of resources that the non-PDCCH of control domain takies, determine the channel resource that in each descending sub frame, PUCCH takies.
Channel resource determination module 33, specifically for for PDCCH, determine that PCFICH takies the number of resources of control domain, according to antenna port, configuration determines that downlink reference signal takies the number of resources of control domain, determines that physical hybrid automatic repeat request indicator channel PHIICH takies the number of resources of control domain.
Channel capacity determination module 34, specifically for for PDCCH, the channel resource taking according to PDCCH polymerization grade and definite PDCCH, determines the channel capacity of PDCCH.
Channel capacity determination module 34, specifically for for PDCCH, the result that the channel resource that definite PDCCH is taken and described N are divided by is as the channel capacity of PDCCH, described PDCCH polymerization classification user of N PDCCH dispatch channel resource.
Those skilled in the art should understand, the application's embodiment can be provided as method, system or computer program.Therefore, the application can adopt complete hardware implementation example, completely implement software example or the form in conjunction with the embodiment of software and hardware aspect.And the application can adopt the form at one or more upper computer programs of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The application is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present application, equipment (system) and computer program.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction that makes to carry out by the processor of computer or other programmable data processing device produces the device for realizing the function of specifying at flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame on computer or other programmable devices.
Although described the application's preferred embodiment, once those skilled in the art obtain the basic creative concept of cicada, can make other change and amendment to these embodiment.So claims are intended to be interpreted as comprising preferred embodiment and fall into all changes and the amendment of the application's scope.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (24)
1. a method for definite control channel capacity, is characterized in that, described method comprises:
Determine system parameters and the networking demand parameter of the Target cell of time division duplex Long Term Evolution TD-LTE system;
According to networking demand parameter and system parameters, determine the channel parameter of control channel;
According to the channel parameter of definite system parameters and definite control channel, determine the channel resource that control channel takies;
The channel resource taking according to definite control channel, determines the channel capacity of control channel.
2. the method for claim 1, is characterized in that, described control channel comprises: Random Access Channel PRACH, ascending control channel PUCCH, physical hybrid automatic repeat request indicator channel PHICH, physical downlink control channel PDCCH.
3. method as claimed in claim 2, is characterized in that, for PRACH, determines system parameters and the networking demand parameter of the Target cell of TD-LTE system, specifically comprises:
Determine system bandwidth, cyclic prefix CP type, uplink and downlink timeslot proportioning, the special subframe proportioning of the Target cell of TD-LTE system;
Determine the affiliated target scene of Target cell, the maximum covering radius of Target cell.
4. method as claimed in claim 3, is characterized in that, for PRACH, according to networking demand parameter and system parameters, determines the channel parameter of control channel, specifically comprises:
Determine channel format, parameter and the channel configuration of PRACH according to the system bandwidth of definite Target cell, CP type, uplink and downlink timeslot proportioning, special subframe proportioning, the affiliated target scene of Target cell, the maximum covering radius of Target cell;
Determine ZC root sequence quantity and ZC-ZCZ sequence quantity according to the maximum covering radius of the affiliated target scene of Target cell, Target cell.
5. method as claimed in claim 4, is characterized in that, channel format, parameter and the channel configuration of definite PRACH specifically comprise:
Cyclic Prefix duration T in PRACH
cP, targeting signal duration T
sEQ, protection interval duration T
gTchannel configuration density D with PRACH
rA.
6. method as claimed in claim 5, is characterized in that, for PRACH, according to the channel parameter of definite system parameters and definite control channel, determines the channel resource that control channel takies, and specifically comprises:
According to the described D determining
rA, random leading quantity and the radio frames of each second determine the channel resource that PRACH takies.
7. method as claimed in claim 6, is characterized in that, for PRACH, and the channel resource taking according to definite control channel, determine and specifically comprise the channel capacity of control channel:
Determine and set the successful access number of times that under the channel resource that collision probability index and definite PRACH take, kind per second can be supported meeting.
8. method as claimed in claim 7, is characterized in that, the concrete channel capacity of utilizing following formula to determine PRACH:
G=L×Ln[1/(1-P
cell UE)]
Wherein, the channel capacity that G is PRACH, L is the channel resource number that definite PRACH takies, P
cell uEfor the collision probability index of setting.
9. method as claimed in claim 2, is characterized in that, for PUCCH, determines system parameters and the networking demand parameter of the Target cell of TD-LTE system, specifically comprises:
Determine system bandwidth, cyclic prefix CP type and the uplink and downlink timeslot proportioning of the Target cell of TD-LTE system;
Determine the affiliated target scene of Target cell, the maximum covering radius of Target cell.
10. method as claimed in claim 9, is characterized in that, for PUCCH, according to networking demand parameter and system parameters, determines the channel parameter of control channel, specifically comprises:
Determine that according to the maximum covering radius of the affiliated target scene of system bandwidth, cyclic prefix CP type and uplink and downlink timeslot proportioning, Target cell, Target cell the Resource Block RB of single sub-frame PUCCH configures, form, the report cycle of ascending control information and the transmission format parameters of PUCCH of the ascending control information of PUCCH carrying.
11. methods as claimed in claim 10, is characterized in that, for PUCCH, according to the channel parameter of definite system parameters and definite control channel, determine the channel resource that control channel takies, and specifically comprise:
Determine the RB configurable number of PUCCH in described report cycle according to the report cycle of the RB configuration of system bandwidth, uplink and downlink timeslot proportioning, single sub-frame PUCCH and ascending control information;
Determine the channel resource number of the PUCCH of every RB support according to the form of the transmission format parameters of PUCCH and ascending control information.
12. methods as claimed in claim 11, is characterized in that, for PUCCH, and the channel resource taking according to definite control channel, determine and specifically comprise the channel capacity of control channel:
According to the channel resource number of the PUCCH of the RB configuration of PUCCH in report cycle and every RB support, determine the channel capacity of PUCCH.
13. methods as claimed in claim 12, is characterized in that, the channel resource number of the PUCCH supporting according to RB configuration and the every RB of PUCCH in report cycle, determines the channel resource that PUCCH takies, and specifically comprises:
The channel resource number of the PUCCH supporting according to every RB and the code channel number that the every RB of ascending control information can carry are determined the channel resource configurable number of ascending control information;
According to the channel resource configurable number of the RB configurable number of PUCCH in report cycle and ascending control information, determine the channel capacity of PUCCH.
14. methods as claimed in claim 2, is characterized in that, for PHICH, determine system parameters and the networking demand parameter of the Target cell of TD-LTE system, specifically comprise:
Determine downlink system bandwidth, CP type, the ascending-descending subframes configuration format of the Target cell of TD-LTE system;
Determine the affiliated target scene and the number of users of carrying out transmitting uplink data of Target cell.
15. methods as claimed in claim 14, is characterized in that, for PHICH, according to networking demand parameter and system parameters, determine the channel parameter of control channel, specifically comprise:
According to the affiliated target scene of Target cell and the number of users of carrying out transmitting uplink data determine the broadcast of PBCH channel for representing the parameter N of the RB number that a process takies
g;
Determine the Coefficient m i corresponding with each descending sub frame according to the downlink system bandwidth of Target cell, ascending-descending subframes configuration, this Coefficient m i represents that the ACK/NACK informational needs of sub-frame of uplink is at the feedback quantity of descending sub frame transmission.
16. methods as claimed in claim 15, is characterized in that, for PHICH, according to the channel parameter of definite system parameters and definite control channel, determine the channel resource that control channel takies, and specifically comprise:
Determine the number of the Resource Block RB of downlink bandwidth support according to downlink system bandwidth;
According to definite m
i, N
gwith the number of Resource Block RB that downlink bandwidth is supported, determine the PHICH group number of each descending sub frame in a radio frames.
17. methods as claimed in claim 16, is characterized in that, the channel resource taking according to definite control channel is determined and specifically comprised the channel capacity of control channel:
According to the number of the PHICH group that in CP type and a definite radio frames, each descending sub frame can carry, determine the channel capacity of PHICH.
18. methods as claimed in claim 2, is characterized in that, for PDCCH, determine system parameters and the networking demand parameter of the Target cell of TD-LTE system, specifically comprise:
Determine system bandwidth, cyclic prefix CP type, ascending-descending subframes configuration, special subframe configuration and the antenna configuration of the Target cell of TD-LTE system;
Determine the affiliated target scene of Target cell, the maximum covering radius of Target cell.
19. methods as claimed in claim 18, is characterized in that, for PDCCH, according to networking demand parameter and system parameters, determine the channel parameter of control channel, specifically comprise:
Determine the channel format of PDCCH according to the system bandwidth of Target cell, cyclic prefix CP type, ascending-descending subframes configuration, special subframe configuration, antenna configuration, the affiliated target scene of Target cell and the maximum covering radius of Target cell.
20. methods as claimed in claim 19, is characterized in that, according to the channel parameter of definite system parameters and definite control channel, determine the channel resource that control channel takies, and specifically comprise:
Determine each descending sub frame control domain total resources number according to the control domain size of the system bandwidth of Target cell, cyclic prefix CP type, ascending-descending subframes configuration, special subframe configuration, the channel format of PDCCH and the instruction of the channel information of Physical Control Format Indicator Channel PCFICH;
Determine the number of resources that the non-PDCCH of control domain takies;
According to each descending sub frame control domain total resources number of determining, the number of resources that the non-PDCCH of control domain takies, determine the channel resource that in each descending sub frame, PUCCH takies.
21. methods as claimed in claim 20, is characterized in that, the number of resources that the non-PDCCH of described definite control domain takies, specifically comprises:
Determine that PCFICH takies the number of resources of control domain;
According to antenna port, configuration determines that downlink reference signal takies the number of resources of control domain;
Determine that physical hybrid automatic repeat request indicator channel PHIICH takies the number of resources of control domain.
22. methods as claimed in claim 21, is characterized in that, the channel resource taking according to definite control channel is determined and specifically comprised the channel capacity of control channel:
The channel resource taking according to PDCCH polymerization grade and definite PDCCH, determines the channel capacity of PDCCH.
23. methods as claimed in claim 22, is characterized in that, described PDCCH polymerization classification user of N PDCCH dispatch channel resource;
Described according to the channel resource of PDCCH polymerization grade and definite PDCCH, determine the channel capacity of PDCCH, be specially:
The result that the channel resource that definite PDCCH is taken and described N are divided by is as the channel capacity of PDCCH.
The device of 24. 1 kinds of definite control channel capacity, is characterized in that, described device comprises:
System parameters determination module, for determining system parameters and the networking demand parameter of Target cell of time division duplex Long Term Evolution TD-LTE system;
Channel parameter determination module, for according to networking demand parameter and system parameters, determines the channel parameter of control channel;
Channel resource determination module, for according to the channel parameter of definite system parameters and definite control channel, determines the channel resource that control channel takies;
Channel capacity determination module, for the channel resource taking according to definite control channel, determines the channel capacity of control channel.
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| CN201210592901.5A CN103916867A (en) | 2012-12-31 | 2012-12-31 | Method and apparatus for determining capacity of control channel |
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| CN201210592901.5A CN103916867A (en) | 2012-12-31 | 2012-12-31 | Method and apparatus for determining capacity of control channel |
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| WO2016065640A1 (en) * | 2014-10-31 | 2016-05-06 | 华为技术有限公司 | Random access method and device |
| CN105900515A (en) * | 2014-10-31 | 2016-08-24 | 华为技术有限公司 | Random access method and device |
| CN105900515B (en) * | 2014-10-31 | 2019-05-07 | 华为技术有限公司 | A kind of accidental access method and equipment |
| WO2016161710A1 (en) * | 2015-04-09 | 2016-10-13 | 宇龙计算机通信科技(深圳)有限公司 | Channel occupation probability adjustment method, adjustment system and device |
| CN109392113B (en) * | 2017-08-09 | 2022-09-02 | 华为技术有限公司 | Method and equipment for receiving control information and sending control information |
| CN109392113A (en) * | 2017-08-09 | 2019-02-26 | 华为技术有限公司 | A kind of method and apparatus for receiving control information, sending control information |
| US11395272B2 (en) | 2017-08-09 | 2022-07-19 | Huawei Technologies Co, , Ltd. | Method and device for receiving and sending control information |
| CN109391449B (en) * | 2017-08-11 | 2021-07-09 | 华为技术有限公司 | Method and communication device for transmitting reference signal |
| CN109391449A (en) * | 2017-08-11 | 2019-02-26 | 华为技术有限公司 | It is used for transmission the method and communication device of reference signal |
| CN110493796A (en) * | 2018-05-15 | 2019-11-22 | 中国移动通信集团湖北有限公司 | Predictor method, device, equipment and the medium of LTE network capacity |
| CN110493796B (en) * | 2018-05-15 | 2022-12-02 | 中国移动通信集团湖北有限公司 | LTE network capacity estimation method, device, equipment and medium |
| CN111356204A (en) * | 2018-12-24 | 2020-06-30 | 华为技术有限公司 | Access method, device and system |
| CN111356204B (en) * | 2018-12-24 | 2021-08-03 | 华为技术有限公司 | Access method, device, terminal, computer storage medium and system |
| CN113411909A (en) * | 2021-08-19 | 2021-09-17 | 成都爱瑞无线科技有限公司 | Data processing method, device, system and storage medium |
| CN114158054A (en) * | 2021-11-23 | 2022-03-08 | 江西省邮电规划设计院有限公司 | NB-IoT capacity estimation method based on time-frequency resources |
| CN114158054B (en) * | 2021-11-23 | 2024-05-28 | 江西省邮电规划设计院有限公司 | NB-IoT capacity estimation method based on time-frequency resource |
| CN114679404A (en) * | 2022-03-22 | 2022-06-28 | 北京邮电大学 | Method, device and equipment for detecting number of uplink VoLTE (Voice over Long term evolution) users |
| CN114679404B (en) * | 2022-03-22 | 2024-05-14 | 北京邮电大学 | Method, device and equipment for detecting number of uplink VoLTE users |
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Application publication date: 20140709 |