CN103716888A - Control channel resource allocation method and base station - Google Patents

Abstract

The embodiments of the invention disclose a control channel resource allocation method and a base station, for realizing control allocation of time domain resources of a PDCCH and improving the capacity of a communication system. The method comprises the following steps: calculating the utilization rate of an uplink authorization CCE within a preset time period after uplink and downlink resources are scheduled by use of a CCE on the PDCCH; determining which one is greater in term of value from the utilization rate of the uplink authorization CCE and an uplink high threshold; if the utilization rate of the uplink authorization CCE is greater than the uplink high threshold, obtaining the sign digits of OFDM (orthogonal frequency division multiplexing) occupied by the PDCCH; determining whether the sign digits of the OFDM reach the maximum value; and when a first adjusting condition is met, lowering the proportion occupied by a downlink authorization CCE, wherein the proportion occupied by the downlink authorization CCE refers to a ratio of the number of CCEs for downlink scheduling to the total number of CEEs mapped to the PDCCH, and the first adjusting condition is that the utilization rate of the uplink authorization CCE is greater than the uplink high threshold and the sign digits of the OFDM do not reach the maximum value.

Description

A kind of distribution method of control channel resource and base station

Technical field

The present invention relates to wireless communication technology field, relate in particular to a kind of distribution method and base station of control channel resource.

Background technology

At Long Term Evolution (LTE, Long Term Evolution) in system, descending control area is for bearing downlink control signal, conventionally take front 1 ~ 3 OFDM (OFDM of a descending sub frame, Orthogonal Frequency Division Multiplexing) symbol, other allocation of symbols are transmitted downlink service data to downlink traffic channel.Descending control area comprises Physical Control Format Indicator Channel (PCFICH, Physical Control Format Indicator Channel), physical mixed automatic repeat request indicating channel (PHICH, Physical Hybrid-ARQ Indicator Channel) and Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel).PCFICH in each descending sub frame carries control format indication information, is used to indicate the OFDM number of symbols that in current subframe, control area takies; PHICH replys for the mixed automatic retransfer request (HARQ, Hybrid Automatic Repeat Request) of carrying for Uplink Shared Channel packet; PDCCH is for bearing downlink control information (DCI, Downlink Control Element), comprises for the schedule information of descending and transmitting uplink data and uplink power control information etc.

The base unit that PCFICH in descending control area and PHICH channel carry out resource mapping is resource element group (REG, Resource Element Group), and a REG comprises 4 continuous Resource Units (RE, Resource Element).The base unit that PDCCH channel in descending control area carries out resource mapping is control channel unit (CCE, Control Channel Element), and CCE is a logical block, and 1 CCE comprises 9 continuous REG.It is N that supposing the system has distributed the quantity that remains REG after PCFICH and PHICH _rEG, in system, the numbering of the CCE of PDCCH, since 0, arrives N _cCE-1, wherein

because the resource resource shared with PDCCH that PCFICH is shared with PHICH channel compared, almost can ignore, so resource shared OFDM symbolic number in control area is mainly determined by PDCCH channel resource.

From LTE agreement, down control channel and data channel share downlink resource, and front 1,2 or 3 symbol in each subframe can be used for transmitting Downlink Control Information, and wherein down control channel specifically accounts for PCFICH channels indication for several symbols.If down control channel resources deficiency and data channel resource is superfluous, now each subframe may not have enough PDCCH resources to carry out dispatched users, causes the idle waste of data channel resource; The data channel inadequate resource if the symbolic number that down control channel takies is too much, the user that now may occur scheduling does not have Traffic Channel to carry out transmitting downlink data, as can be seen here, the shared time-domain resource of reasonable distribution down control channel and data channel, extremely important for system.

In existing LTE system, PDCCH Resource Allocation Formula mainly contains two kinds: the associating adaptive resource allocation method of a kind of PDCCH of being, mainly in the situation that the total PDCCH resource of system is definite, according to the channel quality condition of the load of community and UE, divide and be used in to the exclusive PDCCH of non-UE of a plurality of UE transmission data with for the exclusive PDCCH of UE to single UE transmission data, determine the method for the CCE polymerization grade of public search space and the exclusive search volume of UE.Another kind is the method for determining quantity of symbols occupied by physical downlink control channel, mainly comprises: obtain the relation that PHICH takies symbol numbers and the shared symbolic number of PDCCH; Obtain the symbol numbers that PHICH takies; According to PHICH, taking the relation of symbol numbers and the shared symbol numbers of PDCCH and PHICH takies symbol numbers and determines the shared symbol numbers of PDCCH.

The present inventor finds in realizing process of the present invention: the scheme of existing these two kinds distribution control channel resources is all the OFDM symbolic number that static allocation PDCCH takies, after determining in advance the shared OFDM symbol numbers of required PDCCH before using PDCCH channel bearing Downlink Control Information, cannot adjust again, thereby the time-domain resource that realizes PDCCH is controlled, due to main by the shared OFDM symbol numbers of static allocation PDCCH in prior art, the scheme of these two kinds of distribution is not considered the quantity of communication system traffic and the uncertainty of business data transmission characteristic, the method of the distribution control channel resource of this static state is difficult to the truth of adaptive system load and business data transmission characteristic, cause power system capacity limited.

Summary of the invention

The embodiment of the present invention provides a kind of distribution method and base station of control channel resource, for realizing the control of the time-domain resource of PDCCH, distributes, and improves the capacity of communication system.

For solving the problems of the technologies described above, the embodiment of the present invention provides following technical scheme:

First aspect, the embodiment of the present invention provides a kind of distribution method of control channel resource, comprising:

The uplink authorization CCE utilance in the preset time period after control channel unit CCE scheduling up-downgoing resource is used in calculating in physical downlink control channel PDCCH;

Judge the numerical values recited between described uplink authorization CCE utilance and up high threshold;

If described uplink authorization CCE utilance is greater than up high threshold, obtain the orthogonal frequency division multiplex OFDM symbolic number that described PDCCH takies;

Judge whether described OFDM symbolic number reaches maximum;

When meeting the first adjusting condition, turn down downstream grants CCE proportion, described downstream grants CCE proportion refers to the CCE number and the ratio that is mapped to total CCE number of described PDCCH for descending scheduling, and described the first adjusting condition is that described uplink authorization CCE utilance is greater than up high threshold and described OFDM symbolic number does not reach maximum.

Second aspect, the embodiment of the present invention also provides a kind of base station, comprising:

Up CCE computing unit, for calculating the uplink authorization CCE utilance in the preset time period of using in physical downlink control channel PDCCH after control channel unit CCE scheduling up-downgoing resource;

The first judging unit, for judging the numerical values recited between described uplink authorization CCE utilance and up high threshold;

Symbolic number acquiring unit, for when described uplink authorization CCE utilance is greater than up high threshold, obtains the orthogonal frequency division multiplex OFDM symbolic number that described PDCCH takies;

The second judging unit, for judging whether described OFDM symbolic number reaches maximum;

Descending CCE adjustment unit, for when meeting the first adjusting condition, turn down downstream grants CCE proportion, described downstream grants CCE proportion refers to the CCE number and the ratio that is mapped to total CCE number of described PDCCH for descending scheduling, and described the first adjusting condition is that described uplink authorization CCE utilance is greater than up high threshold and described OFDM symbolic number does not reach maximum.

As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages:

In embodiments of the present invention, first on PDCCH, use in the preset time period after CCE scheduling up-downgoing resource and calculate uplink authorization CCE utilance, then judge the magnitude relationship of the up high threshold of this uplink authorization CCE utilance and setting, when uplink authorization CCE utilance is greater than up high threshold, get the OFDM symbolic number that PDCCH takies, when meeting the first adjusting condition, turn down downstream grants CCE proportion, because the uplink authorization CCE utilance calculating in the embodiment of the present invention is for a preset time period of using on PDCCH after CCE scheduling up-downgoing resource, and foundation is that uplink authorization CCE utilance is greater than up high threshold and OFDM symbolic number does not reach maximum when turning down downstream grants CCE proportion, so the method for the embodiment of the present invention is to carry out the distribution of control channel resource in the situation that can reflecting really communication system traffic transmission characteristic, and can also dynamically adjust according to uplink authorization CCE utilance and OFDM symbolic number in the preset time period after using PDCCH channel bearing Downlink Control Information, the truth that can meet system load and business data transmission characteristic, improve the capacity of communication system.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, to those skilled in the art, can also obtain according to these accompanying drawings other accompanying drawing.

The process blocks schematic diagram of the distribution method of a kind of control channel resource that Fig. 1 provides for the embodiment of the present invention;

Fig. 2 is the schematic diagram of relation between various descending high threshold value and cell throughout;

Fig. 3 be various preset time period value and cell throughout between the schematic diagram of relation;

A kind of application scenarios schematic diagram of the distribution method of the control channel resource that Fig. 4 provides for the embodiment of the present invention;

The another kind of application scenarios schematic diagram of the distribution method of the control channel resource that Fig. 5 provides for the embodiment of the present invention;

The composition structural representation of the base station that Fig. 6 provides for the embodiment of the present invention.

Embodiment

The embodiment of the present invention provides a kind of distribution method and base station of control channel resource, for realizing the control of the time-domain resource of PDCCH, distributes, and improves the capacity of communication system.

For making goal of the invention of the present invention, feature, advantage can be more obvious and understandable, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, the embodiments described below are only the present invention's part embodiment, but not whole embodiment.Embodiment based in the present invention, the every other embodiment that those skilled in the art obtains, belongs to the scope of protection of the invention.

The distribution method of the control channel resource that the embodiment of the present invention provides, as shown in Figure 1, mainly comprises the steps:

101, calculate at Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel) the uplink authorization CCE utilance in the upper preset time period of using after control channel unit (CCE, Control Channel Element) scheduling up-downgoing resource.

In embodiments of the present invention, base station is when being used PDCCH channel bearing Downlink Control Information, the distribution method of the control channel resource that base station can provide according to the embodiment of the present invention is dynamically adjusted, to meet the truth of system load and business data transmission characteristic, it is completely not identical cannot adjusting after determining in advance the shared OFDM symbol numbers of required PDCCH in this and prior art before using PDCCH channel bearing Downlink Control Information again.In embodiments of the present invention, when adjusting minute timing of control channel resource, first by calculate the uplink authorization CCE utilance in the preset time period of using after CCE scheduling up-downgoing resource in step 101 on PDCCH, that is to say, in the embodiment of the present invention, which need to be set in the time period calculating uplink authorization CCE utilance for after CCE scheduling up-downgoing resource, and this preset time period is the time period of choosing when using CCE to dispatch up-downgoing resource on PDCCH channel, by the statistics of the uplink authorization CCE utilance to this time period, the real channel environmental aspect that can reflect PDCCH.

It should be noted that, in embodiments of the present invention, uplink authorization CCE utilance refers to the ratio that within preset time period CCE is used to dispatching uplink resource, reflection be the situation of ascending control channel.Wherein, as attainable mode, be, uplink authorization CCE utilance can be defined as the CCE number that dispatching uplink resource is used within a preset time period and keep for Physical Uplink Shared Channel (PUSCH, Physical Uplink Shared Channel)/transmitting power is controlled (TPC, the ratio of total CCE number Transmit Power Control), wherein CCE number is the abbreviation of CCE number or CCE number.

Step 101 is calculated the uplink authorization CCE utilance in the preset time period of using on PDCCH after CCE scheduling up-downgoing resource, specifically can comprise the steps:

A1, obtain the CCE number that dispatching uplink resource is used within this preset time period;

A2, obtain total CCE number of keeping for PUSCH/TPC within this preset time period;

A3, definition uplink authorization CCE utilance are R _{cCE_ul_use}, calculate R _{cCE_ul_use}in the following way:

$R_{\mathrm{CCE}\_\mathrm{ul}\_\mathrm{use}}=\frac{\underset{i=t-N_{\mathrm{TTI}}}{\overset{t}{\mathrm{\Σ}}}{N}_{i,\mathrm{CCE}\_\mathrm{ul}\_\mathrm{use}}}{N_{\mathrm{TTI}}*N_{\mathrm{CCE}\_\mathrm{ul}\_\mathrm{total}}}*100\%,$

Wherein, N _{i, CCE__ul_use}be illustrated in i Transmission Time Interval (TTI, Transmission Time Interval) and carry out uplink scheduling and use CCE number, t represents current subframe numbering, N _tTIrepresent the number of sub-frames comprising in preset time period, N _{cCE_ul_total}represent to keep for total CCE number of PUSCH/TPC scheduling.

For steps A 1, by carrying out the CCE number that uplink scheduling uses on each TTI, be added, obtain carrying out the CCE number that uplink scheduling is used within preset time period, for example, preset time period 10 subframes of setting, if current subframe numbering t is 1000, when the CCE using in calculating dispatching uplink resource counts, from i=1000-10, start the CCE number of using at each TTI to be added, until i=1000, obtain the CCE that dispatching uplink resource is used within preset time period, but in actual applications, the selection of preset time period and current subframe numbering need to be set according to concrete application scenarios, herein just for example, do not limit.

102, the numerical values recited between judgement uplink authorization CCE utilance and up high threshold.

In embodiments of the present invention, base station is in advance according to traffic data type, number of users, the up high threshold of system parameter setting that system bandwidth etc. are concrete, up high threshold refers to uses CCE dispatching uplink resource in the higher limit guaranteeing in cell throughout situation, this up high threshold can be by base station according to traffic data type, number of users, the system parameters that system bandwidth etc. are concrete arranges flexibly, and base station can also arrange respectively different up high threshold according to the concrete number of the shared OFDM symbolic number of PDCCH, the up high threshold of base station sets can also specifically be set according to concrete service application scene, and base station can also dynamically be adjusted, to meet the truth of system load and business data transmission characteristic.

After in step 101, base station calculates uplink authorization CCE utilance, in step 102, the up high threshold of uplink authorization CCE utilance and base station sets is carried out the comparison of numerical values recited in base station, and result relatively has three kinds: uplink authorization CCE utilance is greater than that up high threshold, uplink authorization CCE utilance are less than up high threshold, uplink authorization CCE utilance equals up high threshold.In step 102, uplink authorization CCE utilance and up high threshold are carried out to numeric ratio is as the foundation that whether needs to adjust the assignment problem of the CCE number between up-downgoing in base station.

If 103 uplink authorization CCE utilances are greater than up high threshold, obtain OFDM (OFDM, the Orthogonal Frequency Division Multiplexing) symbolic number that PDCCH takies.

In step 103, base station obtains the OFDM symbolic number that PDCCH takies, and OFDM symbolic number refers to the number of OFDM symbol.

104, judge whether OFDM symbolic number reaches maximum.

Whether the OFDM symbolic number of obtaining in base station determining step 103 in step 104 reaches maximum, maximum refers to the maximum number of the OFDM symbolic number that PDCCH can take, under normal conditions, descending control area takies front 1 ~ 3 OFDM symbol of a descending sub frame conventionally, this maximum can value be 3 conventionally, but this maximum can also be set by concrete application scenarios, does not limit herein.

105, when meeting the first adjusting condition, turn down downstream grants CCE proportion, wherein, the first adjusting condition is that uplink authorization CCE utilance is greater than up high threshold and OFDM symbolic number does not reach maximum.

Wherein, downstream grants CCE proportion refers to the CCE number and the ratio that is mapped to total CCE number of PDCCH for descending scheduling.The total CCE number that is mapped to PDCCH comprises for the CCE number of descending scheduling with for the CCE number sum of uplink scheduling.In embodiments of the present invention, downstream grants CCE proportion is turned down in base station, has namely reduced the CCE number for descending scheduling, corresponding, and making increases for the uplink authorization CCE number of uplink scheduling.

Downstream grants CCE proportion refers to the ratio with total CCE number for the CCE number of descending scheduling, and definition downstream grants CCE proportion is R _{cCE_dl}, definition is N for the CCE number of descending scheduling _{cCE_dl_total}, total CCE number that definition is mapped to PDCCH is N _{cCE_total}, between them, meet following relational expression:

$R_{\mathrm{CCE}\_\mathrm{dl}}=\frac{N_{\mathrm{CCE}\_\mathrm{dl}\_\mathrm{total}}}{N_{\mathrm{CCE}\_\mathrm{total}}}*100\%.$

In embodiments of the present invention, base station sets the first adjusting condition performs step 105 when the first adjusting condition meets, and wherein, the first adjusting condition of setting is that uplink authorization CCE utilance is greater than up high threshold and OFDM symbolic number does not reach maximum.

It should be noted that, in the embodiment of the present invention, step 105 is turned down downstream grants CCE proportion, when specific implementation, need to turn down how many downstream grants CCE proportions, by specific implementation scene, decided, specifically can lower 0.05, also can lower 0.1 etc.

It should be noted that, in embodiments of the present invention, the distribution method of the control channel resource that the embodiment of the present invention provides can also comprise the steps (not shown in Figure 1):

106, calculate the downstream grants CCE utilance in this preset time period;

107, the numerical values recited between judgement downstream grants CCE utilance and descending high threshold;

Wherein, the first adjusting condition in 105 is that uplink authorization CCE utilance is greater than up high threshold and OFDM symbolic number does not reach maximum, or the first adjusting condition is that uplink authorization CCE utilance is greater than up high threshold and OFDM symbolic number reaches maximum and downstream grants CCE utilance is less than or equal to descending high threshold.

It should be noted that, in step 106, downstream grants CCE utilance refers to the ratio that within preset time period CCE is used to dispatching downlink resource, reflection be the situation of down control channel.Wherein, as attainable mode, be, downstream grants CCE utilance can be defined as the CCE number that dispatching downlink resource is used within a preset time period and keep for Physical Downlink Shared Channel (PDSCH, the ratio of total CCE number Physical Downlink Shared Channel), wherein CCE number is the abbreviation of CCE number or CCE number.

In step 106, the downstream grants CCE utilance in preset time period is calculated in base station, specifically can comprise the steps:

B1, obtain the CCE number that dispatching downlink resource is used within preset time period;

B2, obtain total CCE number of keeping for PDSCH within preset time period;

B3, definition downstream grants CCE utilance are R _{cCE_dl_use}, calculate in the following way R _{cCE_dl_use}:

$R_{\mathrm{CCE}\_\mathrm{dl}\_\mathrm{use}}=\frac{\underset{i=t-N_{\mathrm{TTI}}}{\overset{t}{\mathrm{\Σ}}}{N}_{i,\mathrm{CCE}\_\mathrm{dl}\_\mathrm{use}}}{N_{\mathrm{TTI}}*N_{\mathrm{CCE}\_\mathrm{dl}\_\mathrm{total}}}*100\%,$

Wherein, N _{i, CCE_dl_use}be illustrated in i TTI and carry out the CCE number that descending scheduling is used, t represents current subframe numbering, N _tTTbe illustrated in the number of sub-frames comprising in preset time period, N _{cCE_dl_total}represent to keep for total CCE number of described PDSCH scheduling.

For step B1, by carrying out the CCE number that descending scheduling uses on each TTI, be added, obtain carrying out the CCE number that descending scheduling is used within preset time period.

For step 107, in embodiments of the present invention, base station is in advance according to traffic data type, number of users, the descending high threshold of system parameter setting that system bandwidth etc. are concrete, descending high threshold refers to uses CCE dispatching downlink resource in the higher limit guaranteeing in cell throughout situation, this descending high threshold can be by base station according to traffic data type, number of users, the system parameters that system bandwidth etc. are concrete arranges flexibly, and base station can also arrange respectively different descending high threshold according to the concrete number of the shared OFDM symbolic number of PDCCH, the descending high threshold of base station sets can also specifically be set according to concrete service application scene, and base station can also dynamically be adjusted, to meet the truth of system load and business data transmission characteristic.

It should be noted that, in the embodiment of the present invention, the execution sequence of step 101 and step 106 does not have precedence relationship, can first perform step 101 and perform step again 106, also can first perform step 106 and perform step again 101, can also perform step 101 and step 106 simultaneously, not limit herein.

It should be noted that, after in step 106, base station calculates downstream grants CCE utilance, in step 107, the descending high threshold of downstream grants CCE utilance and base station sets is carried out the comparison of numerical values recited in base station, and result relatively has three kinds: downstream grants CCE utilance is greater than that descending high threshold, downstream grants CCE utilance are less than descending high threshold, downstream grants CCE utilance equals descending high threshold.In step 107, downstream grants CCE utilance and descending high threshold are carried out to numeric ratio is as the foundation that whether needs to adjust the assignment problem of the CCE number between up-downgoing in base station.For carrying out numeric ratio result in step 107, also can define the first adjusting condition, when this first adjusting condition meets, also can again perform step 105, define the first adjusting condition herein except pointing out in step 105, this first adjusting condition can also be greater than up high threshold for uplink authorization CCE utilance, and OFDM symbolic number reaches maximum, and downstream grants CCE utilance is less than or equal to descending high threshold, need to meet following three conditions: one simultaneously, uplink authorization CCE utilance is greater than up high threshold, two, OFDM symbolic number reaches maximum, three, downstream grants CCE utilance is less than or equal to descending high threshold.

Implementation for the up high threshold of base station sets in the detailed description embodiment of the present invention, up low threshold (being described in detail in subsequent descriptions), descending high threshold, descending low threshold (being described in detail in subsequent descriptions), in the embodiment of the present invention, base station is elaborated to be limited to example according to concrete descending wealthy families of system parameter setting such as traffic data type, number of users, system bandwidths, and the implementation of other three threshold values can implement equally.

The service area environment of base station sets is 6 Bian Xing communities, the carrier frequency that base station adopts is 2.3GHz, modulation system is OFDM access (OFDMA, Orthogonal Frequency Division Multiple Access), and the system bandwidth that base station adopts is 10MHz, be 1ms dispatching cycle, service source is Full Buffer, sets a plurality of different descending high threshold, then carries out emulation, and compare simulation result, to find out best descending high threshold.Corresponding cell throughout under the value condition of the various descending high threshold that concrete test case and simulation result are as shown in table 1.

For clearer explanation is for relation between various descending high threshold and cell throughout, refer to shown in Fig. 2, schematic diagram for relation between various descending high threshold value and cell throughout, as can be seen from Figure 2, when descending high threshold increases gradually between 0.5 ~ 0.8, cell throughout increases gradually, when descending high threshold increases gradually between 0.8 ~ 0.9, cell throughout reduces a little to some extent, and descending wealthy family is limited at 0.8 o'clock, and cell throughout is maximum.

It should be noted that, for Fig. 2, this scene is that Full Buffer service source, number of users are 2, initial PDCCH resource distribution is (3,2), known by analyzing, control channel resource is superfluous, and traffic channel resource is not enough, therefore needs to reduce control channel resource and improves throughput of system.Implementation algorithm from aforementioned description, when control channel resource surplus, when traffic channel resource is not enough, descending high threshold is higher, the branch's number of times that enters minimizing CCE number is more, it is shorter that unnecessary control channel resource is converted to the time of traffic channel resource, throughput of system is larger, therefore when descending high threshold increases gradually between 0.5 ~ 0.8, throughput of system increases gradually, for Full Buffer service source, to number of users, be 5 in addition, 10 scene has also been carried out emulation, result shows that descending high threshold is between 0.75 ~ 0.90, throughput of system is higher, by above simulation analysis, can draw, when descending high threshold is between 0.75 ~ 0.90, throughput of system is higher, than the Adaptive adjusting algorithm throughput of system that does not use the embodiment of the present invention to provide, improve 10% ~ 20% left and right.

It should be noted that, in emulation platform, service source is all to set up when emulation starts, and is continued until that emulation finishes, in whole simulation process, service source type does not change, in stable state, not quite alike with actual system, the descending high threshold recommendation therefore providing according to simulation result may be not too suitable, in real system application, according to field condition configurating downlink high threshold.Above simulation result has just illustrated the implementation of the descending high threshold of base station sets in the embodiment of the present invention, and in concrete application scenarios, base station can also be adjusted descending high threshold dynamically.

It should be noted that in addition, the preset time period of selecting in the embodiment of the present invention is the triggering cycle of the distribution method of control channel resource, time length setting for preset time period in the detailed explanation embodiment of the present invention, in the embodiment of the present invention with test under 10M bandwidth, under Full Buffer service source, it is that example is elaborated that different preset time period T is carried out to emulation, concrete test case and simulation result as shown in table 2 when descending high threshold is 0.9 each different preset time period corresponding cell throughout.

For clearer explanation is for relation between various preset time period and cell throughout, refer to shown in Fig. 3, for various preset time period value and cell throughout between the schematic diagram of relation, as can be seen from Figure 3, when preset time period increases gradually, cell throughout reduces gradually, because when preset time period is larger, the number of times that can meet the adjusting condition that the embodiment of the present invention provides is fewer, it is slower that control channel resource and traffic channel resource are changed, and cell throughout is less.Therefore preset time period is shorter, the distribution method convergence time that the embodiment of the present invention provides is shorter, and cell throughout is higher, corresponding, and the number of times that enters distribution adjustment of the present invention is more, and system complexity is higher, so need to compromise between performance and complexity.In emulation platform, service source is all to set up when emulation starts, and is continued until that emulation finishes, in whole simulation process, service source type does not change, in stable state, not quite alike with actual system, therefore according to simulation result, provide preset time period recommendation may be not too suitable, in real system application, can configure preset time period T according to field condition, in the acceptable situation of system complexity, T is the smaller the better.

It should be noted that, in embodiments of the present invention, the distribution method of the control channel resource that the embodiment of the present invention provides can also comprise the steps (not shown in Figure 1):

If 108 downstream grants CCE utilances are greater than descending high threshold, the numerical values recited between judgement uplink authorization CCE utilance and up low threshold;

109, when meeting the second adjusting condition, heighten downstream grants CCE proportion, the second adjusting condition is that uplink authorization CCE utilance is less than up low threshold and downstream grants CCE utilance is greater than descending high threshold.

For step 108, to carry out after step 107 is carried out, in embodiments of the present invention, base station is in advance according to traffic data type, number of users, the up low threshold of system parameter setting that system bandwidth etc. are concrete, up low threshold refers to and uses CCE dispatching uplink resource in the lower limit guaranteeing in cell throughout situation, this up low threshold can be by base station according to traffic data type, number of users, the system parameters that system bandwidth etc. are concrete arranges flexibly, and base station can also arrange respectively different up low thresholds according to the concrete number of the shared OFDM symbolic number of PDCCH, the up low threshold of base station sets can also specifically be set according to concrete service application scene, and base station can also dynamically be adjusted, to meet the truth of system load and business data transmission characteristic.

For step 109, downstream grants CCE proportion is heightened in base station, namely increased the CCE number for descending scheduling, accordingly, make to reduce for the uplink authorization CCE number of uplink scheduling, because uplink authorization CCE utilance is less than up low threshold, therefore should reduce for uplink authorization CCE number.

It should be noted that, in embodiments of the present invention, the distribution method of the control channel resource that the embodiment of the present invention provides can also comprise the steps (not shown in Figure 1):

110, when meeting the 3rd adjusting condition, increase the OFDM symbolic number that PDCCH takies, the 3rd adjusting condition is that downstream grants CCE utilance is greater than descending high threshold and uplink authorization CCE utilance is more than or equal to up low threshold and OFDM symbolic number does not reach maximum.

In embodiments of the present invention, step 110 is carried out after step 108, and in step 110, the 3rd adjusting condition can also be set in base station, and when meeting the 3rd adjusting condition, base station can increase the OFDM symbolic number that PDCCH takies.Meet the 3rd adjusting condition namely needs meet following three conditions simultaneously: one, downstream grants CCE utilance is greater than descending high threshold, two, uplink authorization CCE utilance is more than or equal to up low threshold, three, OFDM symbolic number do not reach maximum.

It should be noted that, in embodiments of the present invention, the distribution method of the control channel resource that the embodiment of the present invention provides can also comprise the steps (not shown in Figure 1):

If 111 downstream grants CCE utilances are less than descending high threshold, the numerical values recited of judgement downstream grants CCE utilance and descending low threshold;

112, judge whether the OFDM symbolic number that PDCCH takies is greater than minimum value;

113, when meeting the 4th adjusting condition, reduce the OFDM symbolic number that PDCCH takies, wherein, the 4th adjusting condition is that downstream grants CCE utilance is less than descending low threshold and OFDM symbolic number is greater than minimum value.

For step 111, after carrying out, step 107 carries out, in embodiments of the present invention, base station is in advance according to traffic data type, number of users, the descending low threshold of system parameter setting that system bandwidth etc. are concrete, descending low threshold refers to and uses CCE dispatching downlink resource in the lower limit guaranteeing in cell throughout situation, this descending low threshold can be by base station according to traffic data type, number of users, the system parameters that system bandwidth etc. are concrete arranges flexibly, and base station can also arrange respectively different descending low thresholds according to the concrete number of the shared OFDM symbolic number of PDCCH, the descending low threshold of base station sets can also specifically be set according to concrete service application scene, and base station can also dynamically be adjusted, to meet the truth of system load and business data transmission characteristic.

For the OFDM symbolic number of obtaining in step 112, whether be greater than minimum value in base station determining step 111, minimum value refers to the minimum number of the OFDM symbolic number that PDCCH can take, under normal conditions, descending control area takies front 1 ~ 3 OFDM symbol of a descending sub frame conventionally, this minimum value can value be 1 conventionally, but this minimum value can also be set by concrete application scenarios, does not limit herein.

In step 113, the 4th adjusting condition can also be set in base station, and when meeting the 4th adjusting condition, the OFDM symbolic number that PDCCH takies can be reduced in base station.Meet the 4th adjusting condition namely needs meet following two conditions simultaneously: one, downstream grants CCE utilance is less than descending low threshold, two, OFDM symbolic number is greater than minimum value.

It should be noted that, in embodiments of the present invention, the distribution method of the control channel resource that the embodiment of the present invention provides can also comprise the steps (not shown in Figure 1):

114, when meeting the first trigger condition, continue to calculate the uplink authorization CCE utilance in another preset time period of using after CCE scheduling up-downgoing resource on PDCCH, the first trigger condition is that uplink authorization CCE utilance is less than or equal to up high threshold, or the first trigger condition is for after turning down downstream grants CCE proportion.

It should be noted that, step 114 is carried out after step 102 or step 105, base station sets the first trigger condition, when meeting the first trigger condition, base station resets another preset time period, and repeated execution of steps 101 realizes the dynamic adjustment to control channel resource.

It should be noted that, in embodiments of the present invention, the distribution method of the control channel resource that the embodiment of the present invention provides can also comprise the steps (not shown in Figure 1):

115, when meeting the second trigger condition, continue to calculate the downstream grants CCE utilance in another preset time period of using after CCE scheduling up-downgoing resource on PDCCH, wherein, the second trigger condition is for after heightening downstream grants CCE proportion, or second trigger condition for after the OFDM symbolic number that has increased PDCCH and take, or second trigger condition for after the OFDM symbolic number that has reduced PDCCH and take, or second trigger condition be that downstream grants CCE utilance is less than or equal to descending high threshold and downstream grants CCE utilance is greater than descending low threshold.

It should be noted that, step 115 is carried out after step 109 or 110 or 112 or 113, base station sets the second trigger condition, when meeting the second trigger condition, base station resets another preset time period, and repeated execution of steps 106 realizes the dynamic adjustment to control channel resource.

In embodiments of the present invention, first on PDCCH, use in the preset time period after CCE scheduling up-downgoing resource and calculate uplink authorization CCE utilance, then judge the magnitude relationship of the up high threshold of this uplink authorization CCE utilance and setting, when uplink authorization CCE utilance is greater than up high threshold, get the OFDM symbolic number that PDCCH takies, when meeting the first adjusting condition, turn down downstream grants CCE proportion, because the uplink authorization CCE utilance calculating in the embodiment of the present invention is for a preset time period of using on PDCCH after CCE scheduling up-downgoing resource, and foundation is that uplink authorization CCE utilance is greater than up high threshold and OFDM symbolic number does not reach maximum when turning down downstream grants CCE proportion, so the method for the embodiment of the present invention is to carry out the distribution of control channel resource in the situation that can reflecting really communication system traffic transmission characteristic, and can also dynamically adjust according to uplink authorization CCE utilance and OFDM symbolic number in the preset time period after using PDCCH channel bearing Downlink Control Information, the truth that can meet system load and business data transmission characteristic, improve the capacity of communication system.

Above embodiment has introduced the distribution method of the control channel resource that the embodiment of the present invention provides, and next with actual application examples, is described in more details.

In the paper embodiment of the present invention, turn down the implementation of downstream grants CCE proportion, as shown in Figure 4, comprise the steps:

401, calculate the uplink authorization CCE utilance R in the preset time period of using after CCE scheduling up-downgoing resource on PDCCH _{cCE_ul_use}with downstream grants CCE utilance R _{cCE_dl_use};

402, judgement R _{cCE_ul_use}whether be greater than up high threshold, work as R _{cCE_ul_use}while being greater than up high threshold, triggering step 403 and carry out, work as R _{cCE_ul_use}be less than or equal to up high threshold, trigger step 401 and re-execute;

403, judge whether OFDM symbolic number reaches maximum, if so, trigger step 404 and carry out, if not, trigger step 405 and carry out;

404, judgement R _{cCE_dl_use}whether be greater than descending high threshold, work as R _{cCE_dl_use}while being greater than descending high threshold, triggering step 401 and re-execute, work as R _{cCE_dl_use}while being less than or equal to descending high threshold, triggering step 405 and carry out;

405, turn down downstream grants CCE proportion.

Next introduce the implementation of heightening downstream grants CCE proportion, increase or minimizing OFDM symbolic number in the embodiment of the present invention, as shown in Figure 5, comprise the steps:

501, calculate the uplink authorization CCE utilance R in the preset time period of using after CCE scheduling up-downgoing resource on PDCCH _{cCE_ul_use}with downstream grants CCE utilance R _{cCE_dl_use};

502, judgement R _{cCE_dl_use}whether be greater than descending high threshold, work as R _{cCE_dl_use}while being greater than descending high threshold, triggering step 503 and carry out, work as R _{cCE_dl_use}while being less than or equal to descending high threshold, triggering step 507 and carry out;

503, judgement R _{cCE_ul_use}whether be greater than up low threshold, work as R _{cCE_ul_use}while being greater than up low threshold, triggering step 504 and carry out, work as R _{cCE_ul_use}be less than or equal to up low threshold, trigger step 505 and carry out;

504, heighten downstream grants CCE proportion, then trigger step 510 and carry out;

505, judge whether OFDM symbolic number reaches maximum, if do not reach maximum, trigger step 506 and carry out, if reached maximum, trigger step 510 and carry out;

506, increase the OFDM symbolic number that PDCCH takies, then trigger step 510 and carry out;

507, judgement R _{cCE_dl_use}whether be less than descending low threshold, work as R _{cCE_dl_use}while being less than descending low threshold, triggering step 508 and carry out, work as R _{cCE_dl_use}while being more than or equal to descending low threshold, triggering step 510 and carry out;

508, judge whether OFDM symbolic number is greater than minimum value, if so, trigger step 509 and carry out, if not, trigger step 510 and carry out;

509, reduce the OFDM symbolic number that PDCCH takies, then trigger step 510 and carry out;

510, calculate the uplink authorization CCE utilance R in another preset time period of using after CCE scheduling up-downgoing resource on PDCCH _{cCE_ul_use}with downstream grants CCE utilance R _{cCE_dl_use}.

Above embodiment has introduced the distribution method of the control channel resource that the embodiment of the present invention provides, next introduce the base station of this distribution method of use that the embodiment of the present invention provides, in actual applications, the base station that the embodiment of the present invention provides, specifically can realize by the mode of software or hardware integration the distribution to control channel resource.To introduce and the corresponding device of method of introducing in said method embodiment in embodiments of the present invention, specifically the manner of execution of each unit can be referring to said method embodiment, and the content of only describing correlation unit at this, is described as follows.

The base station that the embodiment of the present invention provides, as shown in Figure 6, base station 600, comprising:

Up CCE computing unit 601, for calculating the uplink authorization CCE utilance in the preset time period of using in physical downlink control channel PDCCH after control channel unit CCE scheduling up-downgoing resource;

The first judging unit 602, for judging the numerical values recited between described uplink authorization CCE utilance and up high threshold;

Symbolic number acquiring unit 603, for when described uplink authorization CCE utilance is greater than up high threshold, obtains the orthogonal frequency division multiplex OFDM symbolic number that described PDCCH takies;

The second judging unit 604, for judging whether described OFDM symbolic number reaches maximum;

Descending CCE adjustment unit 605, for when meeting the first adjusting condition, turn down downstream grants CCE proportion, described downstream grants CCE proportion refers to the CCE number and the ratio that is mapped to total CCE number of described PDCCH for descending scheduling, and described the first adjusting condition is that described uplink authorization CCE utilance is greater than up high threshold and described OFDM symbolic number does not reach maximum.

It should be noted that the base station providing for the embodiment of the present invention is that base station 600 can also comprise (not shown in Figure 6) as a kind of attainable mode wherein:

Descending CCE computing unit, for calculating the downstream grants CCE utilance in described preset time period;

The 3rd judging unit, for judging the numerical values recited between described downstream grants CCE utilance and descending high threshold;

Described descending CCE adjustment unit, also for when meeting the first adjusting condition, turn down downstream grants CCE proportion, described the first adjusting condition is that described uplink authorization CCE utilance is greater than up high threshold and described OFDM symbolic number does not reach maximum, or described the first adjusting condition is that described uplink authorization CCE utilance is greater than up high threshold and described OFDM symbolic number reaches maximum and described downstream grants CCE utilance is less than or equal to descending high threshold.

It should be noted that the base station providing for the embodiment of the present invention is that base station 600 can also comprise (not shown in Figure 6) as another kind of attainable mode wherein:

The 4th judging unit, for when described downstream grants CCE utilance is greater than descending high threshold, judges the numerical values recited between described uplink authorization CCE utilance and up low threshold;

Described descending CCE adjustment unit, also for when meeting the second adjusting condition, heighten downstream grants CCE proportion, described the second adjusting condition is that described uplink authorization CCE utilance is less than up low threshold and described downstream grants CCE utilance is greater than descending high threshold.

It should be noted that the base station providing for the embodiment of the present invention is that base station 600 can also comprise (not shown in Figure 6) as another kind of attainable mode wherein:

The one OFDM symbol adjustment unit, for when meeting the 3rd adjusting condition, increase the OFDM symbolic number that described PDCCH takies, described the 3rd adjusting condition is that described downstream grants CCE utilance is greater than descending high threshold and described uplink authorization CCE utilance is more than or equal to up low threshold and described OFDM symbolic number does not reach maximum.

It should be noted that the base station providing for the embodiment of the present invention is that base station 600 can also comprise (not shown in Figure 6) as another kind of attainable mode wherein:

The 5th judging unit, for when described downstream grants CCE utilance is less than descending high threshold, judges the numerical values recited of described downstream grants CCE utilance and descending low threshold;

The 6th judging unit, for judging whether the OFDM symbolic number that described PDCCH takies is greater than minimum value;

The 2nd OFDM symbol adjustment unit, for when meeting the 4th adjusting condition, reduces the OFDM symbolic number that described PDCCH takies, and described the 4th adjusting condition is that described downstream grants CCE utilance is less than descending low threshold and described OFDM symbolic number is greater than minimum value.

It should be noted that, the up CCE computing unit providing for the embodiment of the present invention, as a kind of attainable mode wherein, be, up CCE computing unit 601 can also be for when meeting the first trigger condition, continue to calculate the uplink authorization CCE utilance in another preset time period of using after CCE scheduling up-downgoing resource on described PDCCH, described the first trigger condition is that described uplink authorization CCE utilance is less than or equal to up high threshold, or described the first trigger condition is for after turning down downstream grants CCE proportion.

It should be noted that, the descending CCE computing unit providing for the embodiment of the present invention, as another kind of attainable mode wherein, be, descending CCE computing unit can also be for when meeting the second trigger condition, continue to calculate the downstream grants CCE utilance in another preset time period of using after CCE scheduling up-downgoing resource on described PDCCH, described the second trigger condition is for after heightening downstream grants CCE proportion, or described the second trigger condition is for after the OFDM symbolic number that has increased described PDCCH and take, or described the second trigger condition is for after the OFDM symbolic number that has reduced described PDCCH and take, or described the second trigger condition is that described downstream grants CCE utilance is less than or equal to descending high threshold and described downstream grants CCE utilance is greater than descending low threshold.

It should be noted that the up CCE computing unit providing for the embodiment of the present invention is that up CCE computing unit 601 can comprise (not shown in Figure 6) as another kind of attainable mode wherein:

The first acquisition module, for obtaining the CCE number that dispatching uplink resource is used within described preset time period;

The second acquisition module, for obtaining total CCE number of keeping for Physical Uplink Shared Channel PUSCH/ transmitting power to control TPC within described preset time period;

The first computing module, for calculating in the following way uplink authorization CCE utilance R _{cCE_ul_use}:

$R_{\mathrm{CCE}\_\mathrm{ul}\_\mathrm{use}}=\frac{\underset{i=t-N_{\mathrm{TTI}}}{\overset{t}{\mathrm{\Σ}}}{N}_{i,\mathrm{CCE}\_\mathrm{ul}\_\mathrm{use}}}{N_{\mathrm{TTI}}*N_{\mathrm{CCE}\_\mathrm{ul}\_\mathrm{total}}}*100\%,$

Wherein, described N _{i, CCE_ul_use}be illustrated in i Transmission Time Interval TTI and carry out uplink scheduling and use CCE number, described t represents current subframe numbering, described N _tTIrepresent the number of sub-frames comprising in described preset time period, described N _{cCE_ul_total}represent to keep for total CCE number of described PUSCH/TPC scheduling.

It should be noted that the descending CCE computing unit providing for the embodiment of the present invention is that descending CCE computing unit can comprise (not shown in Figure 6) as another kind of attainable mode wherein:

The 3rd acquisition module, for obtaining the CCE number that dispatching downlink resource is used within described preset time period;

The 4th acquisition module, for obtaining total CCE number of keeping for Physical Downlink Shared Channel PDSCH within described preset time period;

The second computing module, for calculating in the following way downstream grants CCE utilance R _{cCE_dl_use}:

$R_{\mathrm{CCE}\_\mathrm{dl}\_\mathrm{use}}=\frac{\underset{i=t-N_{\mathrm{TTI}}}{\overset{t}{\mathrm{\Σ}}}{N}_{i,\mathrm{CCE}\_\mathrm{dl}\_\mathrm{use}}}{N_{\mathrm{TTI}}*N_{\mathrm{CCE}\_\mathrm{dl}\_\mathrm{total}}}*100\%,$

Wherein, described N _{i, CCE_dl_use}be illustrated in i TTI and carry out the CCE number that descending scheduling is used, described t represents current subframe numbering, described N _tTIrepresent the number of sub-frames comprising in described preset time period, described N _{cCE_dl_total}represent to keep for total CCE number of described PDSCH scheduling.

It should be noted that, the contents such as the information interaction between each module/unit of said apparatus, implementation, due to the inventive method embodiment based on same design, its technique effect bringing is identical with the inventive method embodiment, particular content can, referring to the narration in the present invention's embodiment of the method as shown in Figure 1, repeat no more herein.

In embodiments of the present invention, first up CCE computing unit is used in the preset time period after CCE scheduling up-downgoing resource and calculates uplink authorization CCE utilance on PDCCH, then the first judging unit judges the magnitude relationship of the up high threshold of this uplink authorization CCE utilance and setting, when uplink authorization CCE utilance is greater than up high threshold, symbolic number acquiring unit gets the OFDM symbolic number that PDCCH takies, when meeting the first adjusting condition, descending CCE adjustment unit is turned down downstream grants CCE proportion, because the uplink authorization CCE utilance calculating in the embodiment of the present invention is for a preset time period of using on PDCCH after CCE scheduling up-downgoing resource, and foundation is that uplink authorization CCE utilance is greater than up high threshold and OFDM symbolic number does not reach maximum when turning down downstream grants CCE proportion, so the method for the embodiment of the present invention is to carry out the distribution of control channel resource in the situation that can reflecting really communication system traffic transmission characteristic, and can also dynamically adjust according to uplink authorization CCE utilance and OFDM symbolic number in the preset time period after using PDCCH channel bearing Downlink Control Information, the truth that can meet system load and business data transmission characteristic, improve the capacity of communication system.

One of ordinary skill in the art will appreciate that all or part of step realizing in above-described embodiment method is to come the hardware that instruction is relevant to complete by program, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.

Above the distribution method of a kind of control channel resource provided by the present invention and base station are described in detail, for one of ordinary skill in the art, thought according to the embodiment of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims (18)

1. a distribution method for control channel resource, is characterized in that, comprising:

The uplink authorization CCE utilance in the preset time period after control channel unit CCE scheduling up-downgoing resource is used in calculating in physical downlink control channel PDCCH;

Judge the numerical values recited between described uplink authorization CCE utilance and up high threshold;

If described uplink authorization CCE utilance is greater than up high threshold, obtain the orthogonal frequency division multiplex OFDM symbolic number that described PDCCH takies;

Judge whether described OFDM symbolic number reaches maximum;

When meeting the first adjusting condition, turn down downstream grants CCE proportion, described downstream grants CCE proportion refers to the CCE number and the ratio that is mapped to total CCE number of described PDCCH for descending scheduling, and described the first adjusting condition is that described uplink authorization CCE utilance is greater than up high threshold and described OFDM symbolic number does not reach maximum.

2. method according to claim 1, is characterized in that, described method also comprises:

Calculate the downstream grants CCE utilance in described preset time period;

Judge the numerical values recited between described downstream grants CCE utilance and descending high threshold;

Described the first adjusting condition is that described uplink authorization CCE utilance is greater than up high threshold and described OFDM symbolic number does not reach maximum, or described the first adjusting condition is that described uplink authorization CCE utilance is greater than up high threshold and described OFDM symbolic number reaches maximum and described downstream grants CCE utilance is less than or equal to descending high threshold.

3. method according to claim 2, is characterized in that, described method also comprises:

If described downstream grants CCE utilance is greater than descending high threshold, judge the numerical values recited between described uplink authorization CCE utilance and up low threshold;

When meeting the second adjusting condition, heighten downstream grants CCE proportion, described the second adjusting condition is that described uplink authorization CCE utilance is less than up low threshold and described downstream grants CCE utilance is greater than descending high threshold.

4. method according to claim 3, is characterized in that, described method also comprises:

When meeting the 3rd adjusting condition, increase the OFDM symbolic number that described PDCCH takies, described the 3rd adjusting condition is that described downstream grants CCE utilance is greater than descending high threshold and described uplink authorization CCE utilance is more than or equal to up low threshold and described OFDM symbolic number does not reach maximum.

5. method according to claim 2, is characterized in that, described method also comprises:

If described downstream grants CCE utilance is less than descending high threshold, judge the numerical values recited of described downstream grants CCE utilance and descending low threshold;

Judge whether the OFDM symbolic number that described PDCCH takies is greater than minimum value;

When meeting the 4th adjusting condition, reduce the OFDM symbolic number that described PDCCH takies, described the 4th adjusting condition is that described downstream grants CCE utilance is less than descending low threshold and described OFDM symbolic number is greater than minimum value.

6. according to the method described in any one in claim 1 to 5, it is characterized in that, described method also comprises:

When meeting the first trigger condition, continue to calculate the uplink authorization CCE utilance in another preset time period of using after CCE scheduling up-downgoing resource on described PDCCH, described the first trigger condition is that described uplink authorization CCE utilance is less than or equal to up high threshold, or described the first trigger condition is for after turning down downstream grants CCE proportion.

7. according to the method described in any one in claim 2 to 5, it is characterized in that, described method also comprises:

When meeting the second trigger condition, continue to calculate the downstream grants CCE utilance in another preset time period of using after CCE scheduling up-downgoing resource on described PDCCH, described the second trigger condition is for after heightening downstream grants CCE proportion, or described the second trigger condition is for after the OFDM symbolic number that has increased described PDCCH and take, or described the second trigger condition is for after the OFDM symbolic number that has reduced described PDCCH and take, or described the second trigger condition is that described downstream grants CCE utilance is less than or equal to descending high threshold and described downstream grants CCE utilance is greater than descending low threshold.

8. according to the method described in any one in claim 1 to 5, it is characterized in that, the uplink authorization CCE utilance in the preset time period after control channel unit CCE scheduling up-downgoing resource is used in described calculating in physical downlink control channel PDCCH, comprising:

Obtain the CCE number that dispatching uplink resource is used within described preset time period;

Obtain total CCE number of keeping for Physical Uplink Shared Channel PUSCH/ transmitting power to control TPC within described preset time period;

Calculate in the following way uplink authorization CCE utilance R _{cCE_ul_use}:

$R_{\mathrm{CCE}\_\mathrm{ul}\_\mathrm{use}}=\frac{\underset{i=t-N_{\mathrm{TTI}}}{\overset{t}{\mathrm{\Σ}}}{N}_{i,\mathrm{CCE}\_\mathrm{ul}\_\mathrm{use}}}{N_{\mathrm{TTI}}*N_{\mathrm{CCE}\_\mathrm{ul}\_\mathrm{total}}}*100\%,$

Wherein, described N _{i, CCE_ul_use}be illustrated in i Transmission Time Interval TTI and carry out uplink scheduling and use CCE number, described t represents current subframe numbering, described N _tTIrepresent the number of sub-frames comprising in described preset time period, described N _{cCE_ul_total}represent to keep for total CCE number of described PUSCH/TPC scheduling.

9. according to the method described in any one in claim 2 to 5, it is characterized in that, the downstream grants CCE utilance in described calculating described preset time period, comprising:

Obtain the CCE number that dispatching downlink resource is used within described preset time period;

Obtain total CCE number of keeping for Physical Downlink Shared Channel PDSCH within described preset time period;

Calculate in the following way downstream grants CCE utilance R _{cCE_dl_use}:

$R_{\mathrm{CCE}\_\mathrm{dl}\_\mathrm{use}}=\frac{\underset{i=t-N_{\mathrm{TTI}}}{\overset{t}{\mathrm{\Σ}}}{N}_{i,\mathrm{CCE}\_\mathrm{dl}\_\mathrm{use}}}{N_{\mathrm{TTI}}*N_{\mathrm{CCE}\_\mathrm{dl}\_\mathrm{total}}}*100\%,$

Wherein, described N _{i, CCE_dl_use}be illustrated in i TTI and carry out the CCE number that descending scheduling is used, described t represents current subframe numbering, described N _tTIrepresent the number of sub-frames comprising in described preset time period, described N _{cCE_dl_total}represent to keep for total CCE number of described PDSCH scheduling.

10. a base station, is characterized in that, comprising:

Up CCE computing unit, for calculating the uplink authorization CCE utilance in the preset time period of using in physical downlink control channel PDCCH after control channel unit CCE scheduling up-downgoing resource;

The first judging unit, for judging the numerical values recited between described uplink authorization CCE utilance and up high threshold;

Symbolic number acquiring unit, for when described uplink authorization CCE utilance is greater than up high threshold, obtains the orthogonal frequency division multiplex OFDM symbolic number that described PDCCH takies;

The second judging unit, for judging whether described OFDM symbolic number reaches maximum;

Descending CCE adjustment unit, for when meeting the first adjusting condition, turn down downstream grants CCE proportion, described downstream grants CCE proportion refers to the CCE number and the ratio that is mapped to total CCE number of described PDCCH for descending scheduling, and described the first adjusting condition is that described uplink authorization CCE utilance is greater than up high threshold and described OFDM symbolic number does not reach maximum.

11. base stations according to claim 10, is characterized in that, described base station also comprises:

Descending CCE computing unit, for calculating the downstream grants CCE utilance in described preset time period;

The 3rd judging unit, for judging the numerical values recited between described downstream grants CCE utilance and descending high threshold;

Described descending CCE adjustment unit, also for when meeting the first adjusting condition, turn down downstream grants CCE proportion, described the first adjusting condition is that described uplink authorization CCE utilance is greater than up high threshold and described OFDM symbolic number does not reach maximum, or described the first adjusting condition is that described uplink authorization CCE utilance is greater than up high threshold and described OFDM symbolic number reaches maximum and described downstream grants CCE utilance is less than or equal to descending high threshold.

12. base stations according to claim 11, is characterized in that, described base station also comprises:

The 4th judging unit, for when described downstream grants CCE utilance is greater than descending high threshold, judges the numerical values recited between described uplink authorization CCE utilance and up low threshold;

Described descending CCE adjustment unit, also for when meeting the second adjusting condition, heighten downstream grants CCE proportion, described the second adjusting condition is that described uplink authorization CCE utilance is less than up low threshold and described downstream grants CCE utilance is greater than descending high threshold.

13. base stations according to claim 12, is characterized in that, described base station also comprises:

The one OFDM symbol adjustment unit, for when meeting the 3rd adjusting condition, increase the OFDM symbolic number that described PDCCH takies, described the 3rd adjusting condition is that described downstream grants CCE utilance is greater than descending high threshold and described uplink authorization CCE utilance is more than or equal to up low threshold and described OFDM symbolic number does not reach maximum.

14. base stations according to claim 11, is characterized in that, described base station also comprises:

The 5th judging unit, for when described downstream grants CCE utilance is less than descending high threshold, judges the numerical values recited of described downstream grants CCE utilance and descending low threshold;

The 6th judging unit, for judging whether the OFDM symbolic number that described PDCCH takies is greater than minimum value;

The 2nd OFDM symbol adjustment unit, for when meeting the 4th adjusting condition, reduces the OFDM symbolic number that described PDCCH takies, and described the 4th adjusting condition is that described downstream grants CCE utilance is less than descending low threshold and described OFDM symbolic number is greater than minimum value.

15. according to claim 10 to the base station described in any one in 14, it is characterized in that, described up CCE computing unit, also for when meeting the first trigger condition, continue to calculate the uplink authorization CCE utilance in another preset time period of using after CCE scheduling up-downgoing resource on described PDCCH, described the first trigger condition is that described uplink authorization CCE utilance is less than or equal to up high threshold, or described the first trigger condition is for after turning down downstream grants CCE proportion.

16. according to claim 11 to the base station described in any one in 14, it is characterized in that, described descending CCE computing unit, also for when meeting the second trigger condition, continue to calculate the downstream grants CCE utilance in another preset time period of using after CCE scheduling up-downgoing resource on described PDCCH, described the second trigger condition is for after heightening downstream grants CCE proportion, or described the second trigger condition is for after the OFDM symbolic number that has increased described PDCCH and take, or described the second trigger condition is for after the OFDM symbolic number that has reduced described PDCCH and take, or described the second trigger condition is that described downstream grants CCE utilance is less than or equal to descending high threshold and described downstream grants CCE utilance is greater than descending low threshold.

17. according to claim 10 to the base station described in any one in 14, it is characterized in that, described up CCE computing unit, comprising:

The first acquisition module, for obtaining the CCE number that dispatching uplink resource is used within described preset time period;

The second acquisition module, for obtaining total CCE number of keeping for Physical Uplink Shared Channel PUSCH/ transmitting power to control TPC within described preset time period;

The first computing module, for calculating in the following way uplink authorization CCE utilance R _{cCE_ul_use}:

$R_{\mathrm{CCE}\_\mathrm{ul}\_\mathrm{use}}=\frac{\underset{i=t-N_{\mathrm{TTI}}}{\overset{t}{\mathrm{\Σ}}}{N}_{i,\mathrm{CCE}\_\mathrm{ul}\_\mathrm{use}}}{N_{\mathrm{TTI}}*N_{\mathrm{CCE}\_\mathrm{ul}\_\mathrm{total}}}*100\%,$

Wherein, described N _{i, CCE_ul_use}be illustrated in i Transmission Time Interval TTI and carry out uplink scheduling and use CCE number, described t represents current subframe numbering, described N _tTIrepresent the number of sub-frames comprising in described preset time period, described N _{cCE_ul_total}represent to keep for total CCE number of described PUSCH/TPC scheduling.

18. according to claim 11 to the base station described in any one in 14, it is characterized in that, described descending CCE computing unit, comprising:

The 3rd acquisition module, for obtaining the CCE number that dispatching downlink resource is used within described preset time period;

The 4th acquisition module, for obtaining total CCE number of keeping for Physical Downlink Shared Channel PDSCH within described preset time period;

The second computing module, for calculating in the following way downstream grants CCE utilance R _{cCE_dl_use}:

$R_{\mathrm{CCE}\_\mathrm{dl}\_\mathrm{use}}=\frac{\underset{i=t-N_{\mathrm{TTI}}}{\overset{t}{\mathrm{\Σ}}}{N}_{i,\mathrm{CCE}\_\mathrm{dl}\_\mathrm{use}}}{N_{\mathrm{TTI}}*N_{\mathrm{CCE}\_\mathrm{dl}\_\mathrm{total}}}*100\%,$

Wherein, described N _{i, CCE_dl_use}be illustrated in i TTI and carry out the CCE number that descending scheduling is used, described t represents current subframe numbering, described N _tTIrepresent the number of sub-frames comprising in described preset time period, described N _{cCE_dl_total}represent to keep for total CCE number of described PDSCH scheduling.

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