CN104813728A - Carrier wave selection method and associated apparatus - Google Patents

Carrier wave selection method and associated apparatus Download PDF

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Publication number
CN104813728A
CN104813728A CN201380000742.8A CN201380000742A CN104813728A CN 104813728 A CN104813728 A CN 104813728A CN 201380000742 A CN201380000742 A CN 201380000742A CN 104813728 A CN104813728 A CN 104813728A
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carrier
combination
priority
maximum
interval
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罗超
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention relates to a carrier wave selection method and an associated apparatus. The method herein comprises the following steps: acquiring a first carrier wave combination which includes all carrier waves distributed by a base station to a terminal; acquiring carrier wave priority of the first carrier wave combination with a priority adjusting circle in the current wireless block circle; acquiring a maximum carrier wave interval of a first frame in the first carrier wave combination in the current wireless block circle, the maximum carrier wave interval resulted acting as a first maximum carrier interval; if the maximum carrier wave interval does not meet requirements of bandwidth constraints of a receiver of the terminal, removing a minimum carrier wave of priority from the first carrier wave combination; or if the maximum carrier wave interval meets requirements of bandwidth constraints of the receiver of the terminal, acquiring a maximum carrier wave interval of a second frame in the first carrier wave combination in the current wireless block circle, the maximum carrier wave interval resulted acting as a second maximum carrier wave interval; if the second maximum carrier wave interval does not meet requirements of bandwidth constraints of the receiver of the terminal, removing the minimum carrier wave of priority from the first carrier wave combination. The method herein can decrease complexity of carrier wave selection.

Description

Carrier selection method and related device
Technical Field
The present invention relates to the field of communications, and in particular, to a carrier selection method and a related apparatus.
Background
In a Global System for Mobile communications (GSM), a Frequency band allocated to a System is divided into a plurality of Frequency points with a bandwidth of 200kHz, and each Frequency point is distinguished by an Absolute Radio Frequency Channel Number (ARFCN), which is also called a Frequency point Number. Each Time slot of the GSM system may carry a Traffic Channel (TCH), a frequency point may provide at most 8 paths of full-rate voice services, 8 consecutive Time slots are referred to as a Time Division Multiple Access (TDMA) frame, and the representation of the GSM carrier in each Time slot is referred to as a burst (burst).
General Packet Radio Service (GPRS) uses the same burst structure, modulation scheme, and TDMA frame structure as GSM. In GPRS, one Packet Data Channel (PDCH) can be carried on each timeslot, but unlike a TCH, one PDCH can be shared by multiple terminals, and one terminal can also be assigned multiple PDCHs. In addition, the GPRS introduces the concept of Radio Block (RB), and a burst with the same slot number on 4 consecutive TDMA frames is called a Radio Block, which is the basic unit for GPRS to perform data transmission.
Downlink Multi-carrier (Downlink Multi-carrier) refers to a base station simultaneously allocating more than 1 carrier to a terminal, and allocating at least one time slot to each carrier in time. Conventional GSM terminals typically use narrowband receivers because they only need to receive one 200KHz carrier signal at a time. Using the downlink multi-carrier technique, a GSM terminal may need to receive data on multiple carriers simultaneously. Suppose that the base station allocates 3 carriers to the terminal. Theoretically, the receiver of the terminal needs to be able to receive data on the 3 carriers simultaneously, and if the 3 carriers use continuous and fixed ARFCNs, the maximum carrier spacing is 600KHz, and the terminal only needs to use a receiver with a bandwidth of 600 KHz. However, in a frequency hopping scenario, the terminal and the base station change their own frequency at each burst, that is, different bursts may correspond to different ARFCNs. The ARFCN may be different for each carrier within each frame time, so the maximum carrier spacing is constantly changing. Since the maximum receiving bandwidth of the wideband receiver is limited, the maximum carrier spacing may exceed the maximum receiving bandwidth of the terminal receiver, so that the terminal receiver cannot receive signals of all carriers simultaneously.
In order to solve the problem of limited bandwidth of a receiver, the prior art adopts a method for selecting carriers in downlink multiple carriers, that is, a terminal only selects a part of carriers to receive, and correspondingly, a base station only selects the part of carriers to transmit. A frequently-used carrier selection method is a traversal method, for example, a base station allocates 3 carriers C1, C2, and C3 to a terminal, and then in any radio block period, the terminal calculates ARFCN of the 3 carriers first, and then determines whether the conditions { C1, C2, C3 } of the 3 carriers satisfy the receiver bandwidth limitation requirement, if the conditions of the 3 carriers all satisfy the receiver bandwidth limitation requirement, the traversal is ended, otherwise, the conditions of the 2 carriers are determined: { C1, C2 }, { C1, C3 }, { C2, C3 }, if one or more combinations in the case of 2 carriers meet the bandwidth limitation requirement of the receiver, selecting one combination from the combinations, for example, selecting the combination with the lowest carrier number, and ending the traversal, otherwise, considering the case of single carrier, only selecting one carrier from the 3 carriers, for example, selecting the combination with the lowest carrier number, that is, C1, and ending the traversal.
The traversal method adopted in the prior art is too high in complexity, and when the total number of carriers is large, the calculation amount is increased sharply, for example, when 6 carriers are allocated to the terminal by the base station, 6 cases exist for 5 carrier combinations, 15 cases exist for 4 carrier combinations or 2 carrier combinations, and 20 cases exist for 3 carrier combinations, whether the bandwidth limitation requirement of the receiver is met needs to be judged for the carrier combinations in each case, and the complexity is higher when the carrier selection is performed as the number of carriers allocated to the terminal by the base station is increased.
Disclosure of Invention
The embodiment of the invention provides a carrier selection method and a related device, which can reduce the carrier selection complexity of downlink multi-carriers.
In a first aspect, a carrier selection method provided in an embodiment of the present invention includes:
acquiring a first carrier combination, wherein the first carrier combination comprises all carriers distributed to a terminal by a base station;
acquiring the priority of the carrier wave of the first carrier wave combination in the priority regulation period of the current wireless block period;
acquiring the maximum carrier interval of a first frame in the current wireless block period in the first carrier combination as the first maximum carrier interval of the first carrier combination;
if the first maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination; or,
if the first maximum carrier interval of the first carrier combination meets the receiver bandwidth limitation of the terminal, acquiring the maximum carrier interval of a second frame in the current radio block period in the first carrier combination as the second maximum carrier interval of the first carrier combination, and if the second maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination.
With reference to the first aspect, in a first possible implementation manner of the first aspect, after removing the carrier with the lowest priority from the first carrier combination, the method further includes:
acquiring a second carrier combination, wherein the second carrier combination comprises all carriers left after the carrier with the lowest priority is removed from the first carrier combination;
acquiring the maximum carrier interval of a first frame in the current wireless block period in the second carrier combination as the first maximum carrier interval of the second carrier combination;
if the first maximum carrier interval of the second carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the second carrier combination; or,
and if the first maximum carrier interval of the second carrier combination meets the receiver bandwidth limit of the terminal, acquiring the maximum carrier interval of a second frame in the second carrier combination in the current wireless block period as the second maximum carrier interval of the second carrier combination.
With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the obtaining a maximum carrier spacing of the second frame in the current radio block period in the second carrier combination as a second maximum carrier spacing of the second carrier combination further includes:
if the second maximum carrier interval of the second carrier combination meets the receiver bandwidth limitation of the terminal, obtaining the maximum carrier interval of the frames left in the current radio block period in the second carrier combination, and if the maximum carrier intervals of the frames left in the current radio block period in the second carrier combination all meet the receiver bandwidth limitation of the terminal, taking all carriers included in the second carrier combination as a final result of carrier selection.
With reference to the first aspect, in a third possible implementation manner of the first aspect, the obtaining a maximum carrier spacing of the second frame in the current radio block period in the first carrier combination as a second maximum carrier spacing of the first carrier combination further includes:
if the second maximum carrier interval of the first carrier combination meets the receiver bandwidth limitation of the terminal, obtaining the maximum carrier interval of the frames left in the current radio block period in the first carrier combination, and if the maximum carrier intervals of the frames left in the current radio block period in the first carrier combination all meet the receiver bandwidth limitation of the terminal, taking all carriers included in the first carrier combination as a final result of carrier selection, or if the maximum carrier interval of any one of the frames left in the current radio block period in the first carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination.
With reference to the first aspect or the first or second or third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, before the acquiring the priority of the carrier of the first carrier combination in the priority adjustment period in which the current radio block period is located, the method further includes: setting an initial priority for the carriers of the first carrier combination;
the obtaining the priority of the carrier of the first carrier combination in the priority adjustment period where the current radio block period is located includes:
and circularly shifting the priority of the carrier of the first carrier combination in the priority adjustment period which is one priority adjustment period before the current wireless block period to the left or the right so as to acquire the priority of the carrier of the first carrier combination in the priority adjustment period which is the current wireless block period.
With reference to the first aspect or the first or second or third possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the obtaining the priority of the carrier of the first carrier combination in the priority adjustment period where the current radio block period is located includes:
randomly generating a priority order of the carriers of the first carrier combination according to a priority adjustment period;
and setting the priority of the carrier wave of the first carrier wave combination in the priority regulation period of the current wireless block period according to the priority sequence generated randomly.
With reference to the first aspect or the first or second or third possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the priority adjustment period is a radio block period, and the obtaining the priority of the carrier of the first carrier combination in the priority adjustment period where the current radio block period is located includes:
and calculating the priority of the carrier wave of the first carrier wave combination in the priority adjustment period in which the current wireless block period is positioned according to the frame number of any frame in the current wireless block period and the number of the carrier waves of the first carrier wave combination.
In a second aspect, an embodiment of the present invention provides a carrier selection apparatus, including:
a carrier combination obtaining unit, configured to obtain a first carrier combination, where the first carrier combination includes all carriers allocated to a terminal by a base station;
a priority obtaining unit, configured to obtain a priority of a carrier of the first carrier combination obtained by the carrier combination obtaining unit in a priority adjustment period in which a current radio block period is located;
a carrier interval obtaining unit, configured to obtain a maximum carrier interval of a first frame in the current radio block period in the first carrier combination obtained by the carrier combination obtaining unit, where the maximum carrier interval is used as a first maximum carrier interval of the first carrier combination;
a carrier selecting unit, configured to remove a carrier with a lowest priority from the first carrier combination according to the priority of the carrier of the first carrier combination acquired by the priority acquiring unit when the first maximum carrier interval of the first carrier combination acquired by the carrier interval acquiring unit does not meet the receiver bandwidth limitation of the terminal; or,
the carrier interval acquiring unit is further configured to acquire, when a first maximum carrier interval of the first carrier combination satisfies a receiver bandwidth limit of the terminal, a maximum carrier interval of a second frame in the current radio block period in the first carrier combination acquired by the carrier combination acquiring unit, as a second maximum carrier interval of the first carrier combination;
the carrier selecting unit is further configured to remove a carrier with a lowest priority from the first carrier combination if the second maximum carrier interval of the first carrier combination acquired by the carrier interval acquiring unit does not satisfy the receiver bandwidth limitation of the terminal.
With reference to the second aspect, in a first possible implementation manner of the second aspect, the carrier combination obtaining unit is further configured to obtain a second carrier combination from the carrier selection unit, where the second carrier combination includes all carriers remaining after a carrier with a lowest priority is removed from the first carrier combination;
the carrier interval acquiring unit is further configured to acquire a second maximum carrier interval of the first frame in the current radio block period in the second carrier combination acquired by the carrier combination acquiring unit, as a first maximum carrier interval of the second carrier combination;
the carrier selecting unit is further configured to remove a carrier with a lowest priority from the second carrier combination when the first maximum carrier interval of the second carrier combination acquired by the carrier interval acquiring unit does not satisfy the receiver bandwidth limitation of the terminal; or,
the carrier interval obtaining unit is further configured to obtain, when the first maximum carrier interval of the second carrier combination satisfies a receiver bandwidth limit of the terminal, a maximum carrier interval of the second frame in the second carrier combination in the current radio block period as a second maximum carrier interval of the second carrier combination.
With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the carrier interval obtaining unit is further configured to obtain a maximum carrier interval of a frame remaining in the current radio block period in a second carrier combination when the second maximum carrier interval of the second carrier combination obtained by the carrier interval obtaining unit meets a receiver bandwidth limit of the terminal;
the carrier selecting unit is further configured to, when the maximum carrier interval of the frames remaining in the current radio block period in the second carrier combination obtained by the carrier interval obtaining unit satisfies the receiver bandwidth limitation of the terminal, take all carriers included in the second carrier combination as a final result of carrier selection, or, when the maximum carrier interval of any one of the frames remaining in the current radio block period in the first carrier combination does not satisfy the receiver bandwidth limitation of the terminal, remove a carrier with a lowest priority from the first carrier combination.
With reference to the second aspect, in a third possible implementation manner of the second aspect, the carrier interval obtaining unit is further configured to obtain a maximum carrier interval of a frame remaining in the current radio block period in the first carrier combination when a second maximum carrier interval of the first carrier combination obtained by the carrier interval obtaining unit meets a receiver bandwidth limit of the terminal;
the carrier selecting unit is further configured to, when the maximum carrier interval of the remaining frames in the current radio block period, obtained by the carrier interval obtaining unit, in the first carrier combination all meets the receiver bandwidth limitation of the terminal, take all carriers included in the first carrier combination as a final result of carrier selection.
With reference to the second aspect or the first, second, or third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the carrier selection apparatus further includes:
a priority initial unit, configured to set an initial priority for the carrier of the first carrier combination acquired by the carrier combination acquisition unit;
the priority obtaining unit is specifically configured to cyclically shift the priority of the carrier of the first carrier combination in a priority adjustment period that is previous to the priority adjustment period in which the current radio block period is located to the left or the right, so as to obtain the priority of the carrier of the first carrier combination in the priority adjustment period in which the current radio block period is located.
With reference to the second aspect or the first, second, or third possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the priority obtaining unit includes:
a priority random generation subunit, configured to randomly generate a priority order of the carriers of the first carrier combination according to a priority adjustment period;
a priority setting subunit, configured to set, according to the priority order randomly generated by the priority random generation subunit, the priority of the carrier of the first carrier combination in the priority adjustment period in which the current radio block period is located.
With reference to the second aspect or the first or second or third possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, the priority adjustment period is a radio block period, and the priority obtaining unit is specifically configured to calculate, according to a frame number of any one frame in the current radio block period and the number of carriers of the first carrier combination, a priority of a carrier of the first carrier combination in the priority adjustment period in which the current radio block period is located.
In a third aspect, an embodiment of the present invention provides a carrier selection apparatus, including: an input device, an output device, a memory, and a processor;
wherein the processor performs the steps of:
acquiring a first carrier combination, wherein the first carrier combination comprises all carriers distributed to a terminal by a base station;
acquiring the priority of the carrier wave of the first carrier wave combination in the priority regulation period of the current wireless block period;
acquiring the maximum carrier interval of a first frame in the current wireless block period in the first carrier combination as the first maximum carrier interval of the first carrier combination;
if the first maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination; or,
if the first maximum carrier interval of the first carrier combination meets the receiver bandwidth limitation of the terminal, acquiring the maximum carrier interval of a second frame in the current radio block period in the first carrier combination as the second maximum carrier interval of the first carrier combination, and if the second maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination.
With reference to the third aspect, in a first possible implementation manner of the third aspect, after the removing a carrier with a lowest priority from the first carrier combination, the method further includes:
acquiring a second carrier combination, wherein the second carrier combination comprises all carriers left after the carrier with the lowest priority is removed from the first carrier combination;
acquiring the maximum carrier interval of a first frame in the current wireless block period in the second carrier combination as the first maximum carrier interval of the second carrier combination;
if the first maximum carrier interval of the second carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the second carrier combination; or,
and if the first maximum carrier interval of the second carrier combination meets the receiver bandwidth limit of the terminal, acquiring the maximum carrier interval of a second frame in the second carrier combination in the current wireless block period as the second maximum carrier interval of the second carrier combination.
With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the processor is further configured to perform the following steps:
if the second maximum carrier interval of the second carrier combination meets the receiver bandwidth limitation of the terminal, obtaining the maximum carrier interval of the frames left in the current radio block period in the second carrier combination, and if the maximum carrier intervals of the frames left in the current radio block period in the second carrier combination all meet the receiver bandwidth limitation of the terminal, taking all carriers included in the second carrier combination as a final result of carrier selection.
With reference to the third aspect, in a third possible implementation manner of the third aspect, the processor is further configured to perform the following steps:
if the second maximum carrier interval of the first carrier combination meets the receiver bandwidth limitation of the terminal, obtaining the maximum carrier interval of the frames left in the current radio block period in the first carrier combination, and if the maximum carrier intervals of the frames left in the current radio block period in the first carrier combination all meet the receiver bandwidth limitation of the terminal, taking all carriers included in the first carrier combination as a final result of carrier selection, or if the maximum carrier interval of any one of the frames left in the current radio block period in the first carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination.
With reference to the third aspect or the first, second, or third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the processor is specifically configured to perform the following steps:
setting an initial priority for the carriers of the first carrier combination;
and circularly shifting the priority of the carrier of the first carrier combination in the priority adjustment period which is one priority adjustment period before the current wireless block period to the left or the right so as to acquire the priority of the carrier of the first carrier combination in the priority adjustment period which is the current wireless block period.
With reference to the third aspect or the first, second, or third possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the processor is specifically configured to perform the following steps:
randomly generating a priority order of the carriers of the first carrier combination according to a priority adjustment period;
and setting the priority of the carrier wave of the first carrier wave combination in the priority regulation period of the current wireless block period according to the priority sequence generated randomly.
With reference to the third aspect or the first, second, or third possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the priority adjustment period is a radio block period, and the processor is specifically configured to execute the following steps:
and calculating the priority of the carrier wave of the first carrier wave combination in the priority adjustment period in which the current wireless block period is positioned according to the frame number of any frame in the current wireless block period and the number of the carrier waves of the first carrier wave combination.
According to the technical scheme, the embodiment of the invention has the following advantages:
in the embodiment of the invention, a first carrier combination is firstly obtained, then the priority of the carrier of the first carrier combination in a priority adjustment period where a current wireless block period is located is obtained, the maximum carrier interval of a first frame in the current wireless block period in the first carrier combination is next obtained, the first maximum carrier interval of the first carrier combination is obtained, and if the first maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limitation of a terminal, the carrier with the lowest priority is removed from the first carrier combination; or, if the first maximum carrier interval of the first carrier combination meets the receiver bandwidth limit of the terminal, obtaining the maximum carrier interval of the second frame in the current radio block period in the first carrier combination, and if the second maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limit of the terminal, removing the carrier with the lowest priority from the first carrier combination. Therefore, in the embodiment of the present invention, when the maximum carrier spacing of the first frame in the first carrier combination does not satisfy the receiver bandwidth limitation, or when the maximum carrier spacing of the first frame in the first carrier combination satisfies the receiver bandwidth limitation and the maximum carrier spacing of the second frame in the first carrier combination does not satisfy the receiver bandwidth limitation, the carriers included in the first carrier combination may eliminate the carriers with the lowest priority according to the priority, thereby reducing the number of carriers available for selection and reducing the complexity of carrier selection. In addition, since the acquired carrier priority is the priority of the carrier of the first carrier combination in the priority adjustment period of the current radio block period, that is, the priority order of all carriers in the first carrier combination can be adjusted along with the change of the priority adjustment period, when the carrier with the lowest priority is selected and removed, a certain carrier is not fixedly removed, but the removed carrier is also changed along with the adjustment of the priority order of all carriers, because the peak throughput corresponding to the carriers with different priority orders is greatly different, the total throughput reduction caused by fixedly removing a certain carrier can be avoided.
Drawings
Fig. 1 is a schematic diagram of a wideband receiver according to an embodiment of the present invention, where the bandwidth of the wideband receiver is limited in a frequency hopping scenario;
fig. 2 is a schematic flowchart of a carrier selection method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of peak throughputs corresponding to different priority orders according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of another embodiment of a carrier selection method according to an embodiment of the present invention;
fig. 5 is a schematic flowchart of a carrier selection method according to another embodiment of the present invention;
fig. 6 is a schematic flowchart of an embodiment of a carrier selection apparatus according to an embodiment of the present invention;
fig. 7 is a schematic flowchart of another embodiment of a carrier selection apparatus according to an embodiment of the present invention;
fig. 8 is a schematic flowchart of another embodiment of a carrier selection apparatus according to an embodiment of the present invention;
fig. 9 is a schematic flowchart of another embodiment of a carrier selection apparatus according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a carrier selection method and a related device, which can reduce the carrier selection complexity of downlink multi-carriers.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one skilled in the art from the embodiments given herein are intended to be within the scope of the invention.
The terms "first," "second," and possibly "third," "fourth," and the like in the description of the invention and in the drawings and claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the modes used in this way may be used interchangeably, where appropriate, to facilitate describing the manner in which embodiments of the present invention differentially process objects of the same type.
As an embodiment of the carrier selection method of the present invention, the method may include: acquiring a first carrier combination, wherein the first carrier combination comprises all carriers distributed to a terminal by a base station; acquiring the priority of the carrier wave of the first carrier wave combination in the priority regulation period of the current wireless block period; acquiring a maximum carrier interval of a first frame in the current radio block period in the first carrier combination as a first maximum carrier interval of the first carrier combination; if the first maximum carrier spacing of the first carrier combination does not satisfy the receiver bandwidth limit of the terminal, removing the carrier with the lowest priority from the first carrier combination; or, if the first maximum carrier spacing of the first carrier combination satisfies the receiver bandwidth limitation of the terminal, acquiring the maximum carrier spacing of the second frame in the current radio block period in the first carrier combination as the second maximum carrier spacing of the first carrier combination, and if the second maximum carrier spacing of the first carrier combination does not satisfy the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination.
In a frequency hopping scenario, the ARFCNs of each carrier may be different in each frame time, so the maximum carrier spacing is also changing. In addition, the maximum reception bandwidth of a wideband receiver is typically limited for cost and performance reasons, so the maximum carrier spacing may exceed the maximum reception bandwidth. In which case the terminal receiver will not be able to receive the signals of all carriers simultaneously. For example, taking fig. 1 as an example to illustrate a case where a receiver bandwidth is limited in a frequency hopping scenario in downlink multi-carrier, assuming that an ARFCN set in Mobile Allocation (MA) is { 1, 10, 19, 28, 37 }, and a base station allocates 2 MAIOs (Mobile Allocation Index offsets) to a terminal: 0 and 2, a in FIG. 11、a2、a3、a4、a5Frequency point with MAIO equal to 0, b1、b2、b3、b4、b5For the frequency bin where MAIO is 2, FN indicates the Frame Number (FN, Frame Number) of the TDMA Frame. The locations of the frequency bins in fig. 1 represent FN and ARFCN for each frequency bin. Assuming that the maximum receiving bandwidth of the wideband receiver is 5MHz, take FN ═ 3 as an example, a4＝37，b4When 10, the maximum carrier spacing is (37-10 + 1) × 200KHz > 5.6MHz > 5MHz, the terminal cannot receive signals on 2 carriers simultaneously because of the limited receiver bandwidth, which is not the case for FN =1, 2, 4, 5.
In order to solve the problem of limited bandwidth of a receiver, a terminal must perform carrier selection in downlink multi-carriers, that is, the terminal ignores a part of carriers and selects only another part of the carriers for reception, and accordingly, a base station also selects only the part of carriers for transmission, and other carriers can be allocated to other terminals. For example, in fig. 1, at FN ═ 3, the terminal ignores the carrier whose MAIO ═ 0, and receives only the data on the carrier whose MAIO ═ 2.
Since GPRS uses radio blocks as basic units for data transmission, and a radio block occupies 4 consecutive bursts in a timeslot, carriers selected in the 4 bursts must be identical. Assume that FN ═ 0, 1, 2, 3 in fig. 1 constitutes one radio block period, i.e., { a }1、a2、a3、a4These 4 bursts constitute a radio block a, { b } b1、b2、b3、b4These 4 bursts constitute radio block b. Although the terminal receiver has no problem of limited receiver bandwidth in FN0, 1 and 2, a burst (assumed as a) must be ignored due to the problem of limited receiver bandwidth in FN34) Due to a4Is ignored, then receive a in front1、a2、a3These 3 bursts are not meaningful. As a result, in the radio block period, the terminal should only receive data on the carrier whose MAIO is 2, and the base station should only transmit data to the terminal on the carrier whose MAIO is 2. As for { a1、a2、a3、a4The radio block a formed by the 4 bursts may be used to schedule other terminals multiplexed on the carrier, for example, the base station is used to schedule terminals supporting only single carrier reception.
When carrier selection is performed, the complexity of the traversal method adopted in the prior art is too high, and when the total number of carriers is large, the calculation amount will rise sharply, for example, when a base station allocates 6 carriers to a terminal, 6 cases exist for 5 carrier combinations, 15 cases exist for 4 carrier combinations or 2 carrier combinations, and 20 cases exist for 3 carrier combinations, it is necessary to determine whether the bandwidth limitation requirement of a receiver is met for the carrier combination in each case, and the complexity will be higher when carrier selection is performed as the number of carriers allocated to the terminal by the base station increases.
Referring to fig. 2, a carrier selection method according to the present invention is provided to reduce complexity of carrier selection, and the carrier selection method provided in an embodiment of the present invention specifically includes the following steps:
201. a first carrier combination is obtained, the first carrier combination including all carriers allocated to the terminal by the base station.
All carriers allocated to the terminal by the base station may be used as the initially selected first carrier combination, for example, the base station allocates 3 carriers to the terminal, including: c0、C1、C2Then, the obtained first carrier combination can be specifically expressed as { C0，C1，C2}。
In the frequency Hopping case, the terminal and the base station can change their frequency every burst, and the TCH or PDCH allocated to the terminal by the base station is no longer only an ARFCN of 200KHz, but MA, Hopping Sequence Number (HSN), and MAIO. The terminal takes the three parameters and the frame number of the current frame as input, calculates a Mobile Allocation Index (MAI) corresponding to the current frame according to a certain algorithm, and finds out the ARFCN corresponding to the current frame from the MA according to the Index, which belongs to the prior art and is not described herein again.
202. And acquiring the priority of the carrier wave of the first carrier wave combination in the priority regulation period of the current wireless block period.
The radio block, which is a basic unit for GPRS data transmission, includes bursts with the same time slot over 4 consecutive frames, and the radio block period is the time required for transmitting one radio block on the PDCH, and may generally include 4 frames.
The priority adjustment period may be n radio block periods, n is greater than or equal to 1, and n is a natural number.
Wherein, the base station allocates a plurality of carriers to the terminal, the terminal needs to select which carriers can be used according to the maximum receiving bandwidth of the receiver of the terminal, the same base station can also select which carriers can be used according to the carrier selection method provided by the embodiment of the invention, it needs to be noted that a priority adjustment period is established between the base station and the terminal, the priority of all carriers in the carrier combination is adjusted according to the priority adjustment period, each time a priority adjustment period is reached, the base station and the terminal adjust the priority of each carrier according to a preset adjustment rule, the priority of each carrier adjusted by the terminal and the base station is consistent, the adjustment rule of the priority can be specifically set according to an application scenario of a demand, and the adjustment rule of the priority is not limited herein.
Step 202 may be performed by the base station, and after allocating the carriers to the terminal, the base station may further set an initial priority to all carriers allocated to the terminal, so as to adjust the priorities of the subsequent carriers according to the initial priority. Specifically, a priority adjustment period may be set, and the priority of each carrier may be adjusted once in each priority adjustment period, for example, the priority adjustment period may be set to one or more radio block periods; similarly, step 202 can also be performed by the terminal, and the terminal can set the priorities of all carriers after receiving all the carriers allocated to the terminal by the base station, and dynamically adjust the priorities of all the carriers in each priority adjustment period.
For example, the base station allocates 3 carriers to the terminal, including C0、C1、C2Assume that the priority of the 3 carriers in the previous priority adjustment period is C0＞C1＞C2If so, the terminal can adjust in the current priority adjustment period according to the priority in the previous priority adjustment period, and can circularly shift left by one bit to adjust to C1＞C2＞C0Or can be randomly adjusted to C1＞C0＞C2And so on.
203. And acquiring the maximum carrier interval of the first frame in the current wireless block period in the first carrier combination as the first maximum carrier interval of the first carrier combination.
In a radio block period, a frequency point of a carrier on each frame corresponds to an ARFCN, and a first frame may be any one frame in a current radio block period, specifically, a current radio block period may include multiple frames, for example: the first frame, the second frame, the third frame and the fourth frame. The maximum carrier spacing of the first frame in the first carrier combination refers to a difference between the maximum ARFCN and the minimum ARFCN in the ARFCNs corresponding to the carriers of the first carrier combination in the first frame.
For example, if the radio block period includes 4 TDMA frames, corresponding FN is FN0, FN1, FN2, and FN3, respectively, and the base station allocates 2 carriers to the terminal, and corresponding MAIOs are MAIO1 and MAIO2, respectively, then the combination of the acquired first carriers is { MAIO1, MAIO2 }. a is1、a2、a3、a4Four frequency points corresponding to MAIO1 ═ 0 in one radio block period, b1、b2、b3、b4In order to set MAIO2 to four bins corresponding to 2 in the one radio block period, assume that a is on FN011 on FN0119 on FN1210 on FN1228 on FN231 on FN2319 on FN34To 37 on FN34To be 10, it needs to first calculate carrier spacings of any two carriers on a first frame (specifically, FN 0), select a largest carrier spacing from the carrier spacings, obtain a largest carrier spacing of the first frame in the first carrier combination, that is, the first largest carrier spacing of the first carrier combination, of course, FN1, FN2, and FN3 may also be selected as the first frame, calculate carrier spacings of the carriers on the frame, and then take the largest value from the carrier spacings as the largest carrier spacing of the first frame in the first carrier combination.
It should be noted that, in the embodiment of the present invention, the following step 204 or step 205 may be performed according to the result of comparing the first maximum carrier spacing of the first carrier combination with the bandwidth limitation of the terminal receiver, respectively.
204. And if the first maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination.
Specifically, after the maximum carrier spacing of the first frame in the first carrier combination is obtained, the first maximum carrier spacing of the first carrier combination is compared with the maximum receiving bandwidth of the receiver, if the first maximum carrier spacing is less than or equal to the maximum receiving bandwidth of the receiver, the first maximum carrier spacing satisfies the bandwidth limitation of the receiver, and if the first maximum carrier spacing is greater than the maximum receiving bandwidth of the receiver, the first maximum carrier spacing does not satisfy the bandwidth limitation of the receiver.
The receiver bandwidth limitation refers to the maximum receiving bandwidth value of the carrier wave which can be received by a receiver of the terminal, and the terminal can report the maximum receiving bandwidth of the terminal to the base station when accessing the network.
Still taking the example in step 203 for illustration, for example, assuming that the maximum receiving bandwidth of the broadband receiver is 5MHz, if the first frame is FN3, a4Is 37, b4And 10, the first maximum carrier spacing is (37-10 + 1) × 200KHz is 5.6MHz > 5MHz, so that the first maximum carrier spacing of the terminal does not satisfy the receiver bandwidth limit of the terminal.
In some embodiments of the present invention, by acquiring the priority of each carrier of the first carrier combination in step 202 and making the priorities of the carriers adjustable along with the change of the priority adjustment period, when the first maximum carrier spacing of the first carrier combination does not meet the receiver bandwidth limitation of the terminal, and the carrier with the lowest priority in the first carrier combination is excluded, the number of carriers to be selected is reduced, thereby reducing the complexity of carrier selection.
In the embodiment of the invention, the priority sequence set for all the carriers in the first carrier combination is adjustable along with the change of the priority adjustment period, so that the selection is rejectedThe carrier with the lowest priority is not fixedly rejected, but the rejected carriers are changed along with the adjustment of the priority order of all carriers, because the peak throughput corresponding to the carriers with different priority orders is greatly different, the total throughput reduction caused by fixedly rejecting the carrier can be avoided. For further explanation, it is assumed that the 3 carriers allocated to the terminal by the base station are respectively C0、C1、C2Then, the priorities between the 3 carriers can be 6 types as follows: c0＞C1＞C2，C0＞C2＞C1，C1＞C0＞C2，C1＞C2＞C0，C2＞C0＞C1，C2＞C1＞C0. Referring to fig. 3, it is assumed that downlink data of a user passes through carriers C respectively0、C1、C2Sending to the base station, traversing all FNs, and discovering for C through simulation0、C1、C2The peak throughput when downlink data is transmitted in different priority orders is very different, and the total throughput is different in each priority order.
It should be noted that fig. 3 is a schematic diagram of a situation that occurs through simulation when a set of parameters is given, because different users and Temporary Block Flows (TBFs) established by the same user at different times have different durations, and a base station cannot give a determined ordering of peak throughputs as in fig. 3 at all in actual data transmission, that is, cannot select carriers of what priority order according to the ordering of peak throughputs, it is possible to set priorities for all carriers in a priority adjustment period where a current radio block period is located according to an embodiment of the present invention to solve the problem, because the priority order of all carriers is adjustable along with a change of the priority adjustment period, when a carrier with the lowest priority is selected to be removed, a carrier with a fixed one is not removed, but along with an adjustment of the priority order of all carriers, the carrier waves to be eliminated are also changed, because the peak throughput corresponding to the carrier waves with different priority orders is greatly different, the total throughput reduction caused by fixedly eliminating a certain carrier wave can be avoided.
205. And if the first maximum carrier interval of the first carrier combination meets the receiver bandwidth limitation of the terminal, acquiring the maximum carrier interval of a second frame in the current radio block period in the first carrier combination as the second maximum carrier interval of the first carrier combination, and if the second maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination.
In the embodiment of the present invention, a plurality of frames are included in the current radio block period, and when the maximum carrier spacing of one frame (referred to as a first frame herein) in the first carrier combination satisfies the limitation of the receiver bandwidth, it needs to continuously determine whether other frames (i.e., all frames remaining in the current radio block period) in the current radio block period satisfy the limitation of the receiver bandwidth, and only if the maximum carrier spacing of all frames in the current radio block period in the first carrier combination satisfies the limitation of the receiver bandwidth, the result can be used as a result of carrier selection. The present invention is a cyclic process, and the processing process of the first frame in the current radio block period is only described here, after the second frame in the current radio block period is acquired, it is also necessary to determine whether the maximum carrier interval of the second frame in the first carrier combination meets the receiver bandwidth limitation, and if not, the carrier with the lowest priority is removed from the first carrier combination.
In the embodiment of the invention, a first carrier combination is firstly obtained, then the priority of the carrier of the first carrier combination in a priority adjustment period where a current wireless block period is located is obtained, the maximum carrier interval of a first frame in the current wireless block period in the first carrier combination is next obtained, the first maximum carrier interval of the first carrier combination is obtained, and if the first maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limitation of a terminal, the carrier with the lowest priority is removed from the first carrier combination; or, if the first maximum carrier interval of the first carrier combination meets the receiver bandwidth limit of the terminal, obtaining the maximum carrier interval of the second frame in the current radio block period in the first carrier combination, and if the second maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limit of the terminal, removing the carrier with the lowest priority from the first carrier combination. Therefore, in the embodiment of the present invention, when the maximum carrier spacing of the first frame in the first carrier combination does not satisfy the receiver bandwidth limitation, or when the maximum carrier spacing of the first frame in the first carrier combination satisfies the receiver bandwidth limitation and the maximum carrier spacing of the second frame in the first carrier combination does not satisfy the receiver bandwidth limitation, the carriers included in the first carrier combination may eliminate the carriers with the lowest priority according to the priority, thereby reducing the number of carriers available for selection and reducing the complexity of carrier selection. In addition, since the acquired carrier priority is the priority of the carrier of the first carrier combination in the priority adjustment period of the current radio block period, that is, the priority order of all carriers in the first carrier combination can be adjusted along with the change of the priority adjustment period, when the carrier with the lowest priority is selected and removed, a certain carrier is not fixedly removed, but the removed carrier is also changed along with the adjustment of the priority order of all carriers, because the peak throughput corresponding to the carriers with different priority orders is greatly different, the total throughput reduction caused by fixedly removing a certain carrier can be avoided.
Optionally, in an implementation manner of the embodiment of the present invention, the priority adjustment period is a radio block period, and step 202 specifically includes:
and calculating the priority of the carrier wave of the first carrier wave combination in the priority adjustment period in which the current wireless block period is positioned according to the frame number of any frame in the current wireless block period and the number of the carrier waves of the first carrier wave combination.
Wherein, the number of the frame number and the carrier wave is determinedThe carrier priority order may be calculated by a complementary method, for example, using the frame number of one of the TDMA frames in the current radio block period (denoted as FN)iI may be 0, 1, 2, 3) and the number of carriers N allocated to the terminal by the base station to calculate the priority order for each carrier. For example, the base station allocates N carriers to the terminal, and the carrier numbers thereof are C respectively0，C1，…，CN－1. Then to determine the priority order of the individual carriers in any one priority adjustment period (i.e., one radio block period), x = FN may be calculatedimod N, then the carrier with the highest priority order is CxThe priority order of all carriers may be Cx>C(x+1)mod N>C(x+2)mod N>…>C(x+N-1)mod N. For example, N =3, the TDMA frame number selected is FN0Then to FN0=17, since x =17 mod 3=2, the priority order of all carriers is C in the current radio block period2＞C0> C1. It should be noted that the calculation method is not limited to the way of obtaining the remainder when calculating x, as long as x can pass through the FNiAnd calculating the N parameter.
Optionally, in another implementation scenario of this embodiment, after acquiring the maximum carrier spacing of the second frame in the current radio block period in the first carrier combination in step 205, as the second maximum carrier spacing of the first carrier combination, the method may further include:
if the second maximum carrier interval of the first carrier combination meets the receiver bandwidth limitation of the terminal, acquiring the maximum carrier interval of the remaining frames in the current wireless block period in the first carrier combination, and if the maximum carrier intervals of the remaining frames in the current wireless block period in the first carrier combination all meet the receiver bandwidth limitation of the terminal, taking all carriers included in the first carrier combination as a final result of carrier selection; or,
and if the maximum carrier interval of any frame in the rest frames in the current wireless block period in the first carrier combination does not meet the receiver bandwidth limit of the terminal, removing the carrier with the lowest priority from the first carrier combination.
Further, on the basis of the embodiment shown in fig. 2, the embodiment of the present invention may further include a processing manner for combining the second carrier, and the following describes the carrier selection method in the embodiment of the present invention with another embodiment in combination with fig. 4:
401. a first carrier combination is obtained, the first carrier combination including all carriers allocated to the terminal by the base station.
All carriers allocated to the terminal by the base station may be used as the initially selected first carrier combination, for example, the base station allocates 3 carriers to the terminal, including: c0、C1、C2Then, the obtained first carrier combination can be specifically expressed as { C0，C1，C2}。
402. And setting initial priority for the carrier of the first carrier combination.
In some embodiments of the present invention, a base station allocates a plurality of carriers to a terminal, and the terminal may select which carriers to use from the carriers according to a maximum receiving bandwidth of a receiver of the terminal, and similarly, the base station may also select which carriers to use from the carriers according to a carrier selection method provided in the embodiments of the present invention. After acquiring all carriers allocated to the terminal by the base station, first setting an initial priority for all carriers, for example, the base station allocates 3 carriers to the terminal: c0、C1、C2The terminal may set initial priorities for the 3 carriers, and specifically may set to C0＞C1＞C2Can also be set to C1＞C2＞C0Can also be set as C1＞C0＞C2And so on.
403. And circularly shifting the priority of the carrier of the first carrier combination in the priority adjustment period which is previous to the priority adjustment period of the current wireless block period to the left or the right so as to acquire the priority of the carrier of the first carrier combination in the priority adjustment period of the current wireless block period.
The radio block, the radio block period, and the priority adjustment period may be referred to the related description in the embodiment shown in fig. 2.
In some embodiments of the present invention, after setting an initial priority order for a carrier of a first carrier combination, an adjustment rule for adjusting the priority order may be established between a base station and a terminal, and specifically, the adjustment rule may be that the priority of the carrier of the first carrier combination in a priority adjustment period previous to the priority adjustment period in which the current radio block period is located is cyclically shifted to the left or the right, that is, the priority of the carrier of the first carrier combination in the previous priority period is cyclically shifted to the left or the right, so as to obtain the priority of the carrier of the first carrier combination in the priority adjustment period in which the current radio block period is located. It is to be understood that the cyclic shift to the left or the right may also be understood as a rotation (priority rotation) of priorities of carriers in a previous priority adjustment period according to a priority adjustment period, and the adjustment of the priority order of all the carriers can be achieved by periodically rotating the priority order, where the rotated priority adjustment period may specifically be rotated once every certain time, for example, once every radio block period, or once every n radio block periods, where n is a natural number greater than 1, and the base station allocates 3 carriers to the terminal: c0、C1、C2And the initial priority order of the 3 carriers is set to C0＞C1＞C2Then, starting from a certain time (e.g., successful channel resource allocation), it is assumed that each radio block is usedPeriod adjustment once, using priority order C in the first radio block period0＞C1＞C2And cyclically shifting the priority order in the first radio block period to the right in the second radio block period to obtain the priority order in the second radio block period to be changed to C2＞C0＞C1And in the third radio block period, the priority sequence in the second radio block period is circularly shifted to the right, so that the priority sequence in the third radio block period is changed to C1＞C2＞C0(ii) a Likewise, priority order C may also be used during the first radio block period0＞C1＞C2Cyclically shifting the priority order of the first radio block period to the left in the second radio block period to obtain the priority order of the second radio block period to be changed to C1＞C2＞C0And circularly shifting the priority sequence in the second wireless block period to the left in the third wireless block period to obtain the priority sequence in the third wireless block period to be changed to C2＞C0＞C1。
404. And acquiring the maximum carrier interval of a first frame in the current wireless block period in the first carrier combination as the first maximum carrier interval of the first carrier combination.
In a radio block period, a frequency point of a carrier on each frame may correspond to an ARFCN, where a first frame is any one frame in a current radio block period, and specifically, the current radio block period may include multiple frames, including: the first frame, the second frame, the third frame and the fourth frame. The maximum carrier spacing of the first frame in the first carrier combination refers to a difference between the maximum ARFCN and the minimum ARFCN in the ARFCNs of the carriers of the first carrier combination in the first frame, and specifically, refer to the relevant description in step 203.
It should be noted that, in the embodiment of the present invention, the following step 405 or step 406 may be performed according to the result of comparing the first maximum carrier spacing of the first carrier combination with the bandwidth limitation of the terminal receiver, respectively.
405. If the first maximum carrier spacing of the first carrier combination does not satisfy the receiver bandwidth limitation of the terminal, the carrier with the lowest priority is removed from the first carrier combination, and then step 407 is executed.
Specifically, after acquiring the maximum carrier spacing of the first frame in the first carrier combination, comparing the first maximum carrier spacing of the first carrier combination with the maximum reception bandwidth of the receiver, if the first maximum carrier spacing of the first carrier combination is smaller than or equal to the maximum reception bandwidth of the receiver, the first maximum carrier spacing of the first carrier combination satisfies the receiver bandwidth limitation, and if the first maximum carrier spacing of the first carrier combination is larger than the maximum reception bandwidth of the receiver, the first maximum carrier spacing of the first carrier combination does not satisfy the receiver bandwidth limitation.
The receiver bandwidth limitation refers to the maximum receiving bandwidth value of the carrier wave which can be received by a receiver of the terminal, and the terminal can report the maximum receiving bandwidth of the terminal to the base station when accessing the network.
In some embodiments of the present invention, by adjusting the priority order of the carriers in the first carrier combination in each priority adjustment period in step 403, when the first maximum carrier spacing of the first carrier combination does not satisfy the receiver bandwidth limitation of the terminal, and the carrier with the lowest priority in the first carrier combination is excluded, the number of carriers to be selected is reduced, thereby reducing the complexity of carrier selection.
406. If the first maximum carrier spacing of the first carrier combination satisfies the receiver bandwidth limitation of the terminal, the maximum carrier spacing of the second frame in the current radio block period in the first carrier combination is obtained as the second maximum carrier spacing of the first carrier combination, and if the second maximum carrier spacing of the first carrier combination does not satisfy the receiver bandwidth limitation of the terminal, the carrier with the lowest priority is removed from the first carrier combination, and then step 407 is executed.
407. And acquiring a second carrier combination, wherein the second carrier combination comprises all carriers left after the carrier with the lowest priority is removed from the first carrier combination.
Wherein the second carrier combination is a subset of the first carrier combination, and the missing one element of the second carrier combination compared to the first carrier combination is the carrier with the lowest priority. For example, the base station allocates 3 carriers to the terminal: c0、C1、C2Then, the obtained first carrier combination can be specifically expressed as { C0，C1，C2Suppose that the priority order of 3 carriers can be set to C0＞C1＞C2Then carrier wave C2Is determined, the maximum carrier spacing of the first frame in the first carrier combination exceeds the receiver bandwidth limit in step 405, and the carrier to be dropped in the first carrier combination should be C2Due to C2Is eliminated, the second carrier combination obtained here can be expressed as { C0，C1}。
408. And acquiring the maximum carrier interval in the second carrier combination according to the first frame in the current wireless block period as the first maximum carrier interval of the second carrier combination.
It should be noted that, in the embodiment of the present invention, the following step 409 or step 410 may be respectively performed according to a relationship between a value of the first maximum carrier spacing of the second carrier combination and a bandwidth limitation of the terminal receiver.
409. And if the first maximum carrier interval of the second carrier combination does not meet the receiver bandwidth limit of the terminal, removing the carrier with the lowest priority from the second carrier combination.
Specifically, after acquiring the maximum carrier spacing of the first frame in the second carrier combination, comparing the first maximum carrier spacing of the second carrier combination with the maximum receiving bandwidth of the receiver, if the first maximum carrier spacing of the second carrier combination is smaller than or equal to the maximum receiving bandwidth of the receiver, the first maximum carrier spacing of the second carrier combination satisfies the receiver bandwidth limitation, and if the first maximum carrier spacing of the second carrier combination is greater than the maximum receiving bandwidth of the receiver, the first maximum carrier spacing of the second carrier combination does not satisfy the receiver bandwidth limitation, where the receiver bandwidth limitation refers to a maximum receiving bandwidth value at which the receiver of the terminal can receive the carrier.
Still by way of example in step 407, the carrier dropped in the first carrier combination of step 405 is the C with the lowest priority2Then the second carrier combination can be expressed as { C0，C1The priority order of 2 carriers in the second carrier combination may be set to C0＞C1If the carrier with the lowest priority is continuously removed according to the processing manner of step 409, the carrier to be removed here is C with the lowest priority1So that the final remaining alternative carriers are only C0The terminal will then transmit the carrier C0As a result of carrier selection.
410. If the first maximum carrier spacing of the second carrier combination satisfies the receiver bandwidth limitation of the terminal, the maximum carrier spacing of the second frame in the second carrier combination in the current radio block period is obtained as the second maximum carrier spacing of the second carrier combination, and then step 411 is executed.
411. If the second maximum carrier spacing of the second carrier combination meets the receiver bandwidth limitation of the terminal, the maximum carrier spacing of the remaining frames in the current radio block period in the second carrier combination is obtained, and then step 412 is executed.
412. And if the maximum carrier interval of the remaining frames in the current radio block period in the second carrier combination meets the receiver bandwidth limit of the terminal, taking all carriers included in the second carrier combination as a final result of carrier selection.
It should be noted that, in the embodiment of the present invention, steps 404 to 406 and steps 408 to 410 are similar processing manners, except that processing objects are different (the aforementioned steps 404 to 406 are for the maximum carrier spacing of the first frame in the first carrier combination, and the following steps 408 to 410 are for the maximum carrier spacing of the first frame in the second carrier combination), but the performed techniques are substantially similar. In the embodiment of the invention, whether the first maximum carrier interval of the first frame in a first carrier combination composed of all carriers distributed to a terminal by a base station meets the bandwidth limitation of a receiver is judged aiming at the first frame in the current wireless block period, if not, the carrier with the lowest priority is removed to obtain a second carrier combination, then polling is carried out again, whether the maximum carrier interval of the first frame in the carrier combinations composed of the rest carriers meets the bandwidth limitation of the receiver is judged again, if not, the carrier with the lowest priority is removed again, and the whole scheme is a polling processing process. For a first frame, when the maximum carrier interval of the first frame in a carrier combination meets the bandwidth limitation of a receiver, continuously judging whether the maximum carrier interval of a second frame in the current carrier combination meets the bandwidth limitation of the receiver, if not, continuously eliminating the carrier with the lowest priority, if so, sequentially judging whether a third frame and a fourth frame in the current wireless block period meet the bandwidth limitation of the receiver, if not, still eliminating the carrier with the lowest priority, and only judging that the carrier included in the carrier combination meeting the bandwidth limitation of the receiver is the carrier selection result of all frames in the current wireless block period.
For another example, if there are four frames in the current radio block period, for the first frame, if the maximum carrier spacing does not satisfy the receiver bandwidth limit of the terminal, the carrier with the lowest priority is removed, and this manner of removing the carrier with the lowest priority is repeated until the maximum carrier spacing satisfies the receiver bandwidth limit of the terminal for the first frame, and certainly, for the first frame, it is also possible that the maximum carrier spacing satisfies the receiver bandwidth limit of the terminal, so that none of the carriers is removed, and then the second frame is processed in the same processing manner as the first frame until all four frames are traversed. In the embodiment of the invention, two traversing and screening processes exist, one is to traverse four frame numbers, and the other is to repeatedly check whether the maximum carrier interval of the current carrier combination meets the receiver bandwidth limitation of the terminal or not for each frame.
It should be noted that, the first maximum carrier spacing described in the embodiment of the present invention refers to the maximum carrier spacing corresponding to the first frame in the first carrier combination or the second carrier combination, and the second maximum carrier spacing refers to the maximum carrier spacing corresponding to the second frame in the first carrier combination or the second carrier combination, where "first" and "second" do not have a sequential or logical meaning, but are used to distinguish that these are two maximum carrier spacings corresponding to different carrier combinations, respectively, and "first" and "second" are only used in a naming manner, which is specifically described herein, and "first" and "second" in "first carrier combination" and "second carrier combination" appearing in the embodiment of the present invention also apply to the foregoing non-limiting description.
In the embodiment of the invention, a first carrier combination is firstly obtained, then the priority of the carrier of the first carrier combination in a priority adjustment period where a current wireless block period is located is obtained, the maximum carrier interval of a first frame in the current wireless block period in the first carrier combination is next obtained, the first maximum carrier interval of the first carrier combination is obtained, and if the first maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limitation of a terminal, the carrier with the lowest priority is removed from the first carrier combination; or, if the first maximum carrier interval of the first carrier combination meets the receiver bandwidth limit of the terminal, obtaining the maximum carrier interval of the second frame in the current radio block period in the first carrier combination, and if the second maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limit of the terminal, removing the carrier with the lowest priority from the first carrier combination. Therefore, in the embodiment of the present invention, when the maximum carrier spacing of the first frame in the first carrier combination does not satisfy the receiver bandwidth limitation, or when the maximum carrier spacing of the first frame in the first carrier combination satisfies the receiver bandwidth limitation and the maximum carrier spacing of the second frame in the first carrier combination does not satisfy the receiver bandwidth limitation, the carriers included in the first carrier combination may eliminate the carriers with the lowest priority according to the priority, thereby reducing the number of carriers available for selection and reducing the complexity of carrier selection. In addition, because the priority of the carrier of the first carrier combination in the priority adjustment period before the priority adjustment period of the current radio block period is circularly shifted to the left or the right to obtain the priority of the carrier in the priority adjustment period of the current radio block period, the priority order of all the carriers in the first carrier combination can be adjusted along with the change of the priority adjustment period, namely, when the carrier with the lowest priority is selected and removed, a certain carrier is not fixedly removed, but the removed carrier is changed along with the adjustment of the priority order of all the carriers.
Optionally, in an implementation scenario of this embodiment, after acquiring a maximum carrier spacing of a second frame in the current radio block period in the first carrier combination in step 406, as a second maximum carrier spacing of the first carrier combination, the method may further include:
if the second maximum carrier interval of the first carrier combination meets the receiver bandwidth limitation of the terminal, acquiring the maximum carrier interval of the remaining frames in the current radio block period in the first carrier combination, and if the maximum carrier intervals of the remaining frames in the current radio block period in the first carrier combination all meet the receiver bandwidth limitation of the terminal, taking all carriers included in the first carrier combination as a final result of carrier selection.
Further, on the basis of the embodiment shown in fig. 2, the embodiment of the present invention may further include a processing manner for a second carrier combination, and the carrier selection method in the embodiment of the present invention is described in another embodiment with reference to fig. 5 below:
501. a first carrier combination is obtained, the first carrier combination including all carriers allocated to the terminal by the base station.
502. And randomly generating the priority order of the carriers of the first carrier combination according to the priority adjustment period.
503. And setting the priority of the carrier of the first carrier combination in the priority adjustment period of the current wireless block period according to the priority sequence generated randomly.
In some embodiments of the present invention, a base station allocates a plurality of carriers to a terminal, the terminal needs to select which carriers can be used according to a maximum receiving bandwidth of a receiver of the terminal, and the same base station can also select which carriers can be used according to a carrier selection method provided by the embodiments of the present invention. After all the carriers distributed to the terminal by the base station are acquired, the priority order of the carriers of the first carrier combination is randomly generated according to the priority adjustment period. That is, the priority order of each carrier is not fixed, but is adjustable with the change of the priority adjustment period, in such a way that the priority order of the carriers is randomized every priority adjustment period (for example, one priority adjustment period is one radio block period), and specifically, all carriers can be assigned with randomly generated priority orders by a Pseudo Random Number Generator (PRNG). For example, the carrier set allocated to the user by the base station is C0，C1，C2Is in an initial priority order of C0＞C1＞C2Then, starting from a certain time (e.g. successful channel resource allocation), the priority order of the carriers in each radio block cycle is as followsDetermining: using a pseudo-random number generator PRNG for generating an integer r, then C0，C1，C2Is C(0+r)%3>C(1+r)%3>C(2+r)%3. For example, when r is 5, then the randomly generated priority order C2＞C0＞C1. In some embodiments of the present invention, the PRNG may be specifically implemented by exclusive or shift (Xorshift), and may also be implemented by a linear congruence method or a hysteresis fibonacci method, and a specific implementation manner may be combined with a specific application scenario, which is not limited herein.
504. And acquiring the maximum carrier interval of the first frame in the current wireless block period in the first carrier combination as the first maximum carrier interval of the first carrier combination.
In a radio block period, a frequency point of each carrier on each frame may correspond to an ARFCN, and a first frame is any one frame in the current radio block period, specifically, the current radio block period may include multiple frames, for example: the first frame, the second frame, the third frame and the fourth frame. The maximum carrier spacing refers to a difference between the maximum ARFCN and the minimum ARFCN in the ARFCNs corresponding to the frequency points of the carriers in one frame.
It should be noted that, in the embodiment of the present invention, the following step 505 or 506 may be respectively performed according to a relationship between a value of the first maximum carrier spacing of the first carrier combination and a bandwidth limitation of the terminal receiver.
505. And if the first maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination.
Specifically, after acquiring the maximum carrier spacing of the first frame in the first carrier combination, a numerical judgment is made on the first maximum carrier spacing of the first carrier combination and the maximum receiving bandwidth of the receiver, if the first maximum carrier spacing of the first carrier combination is smaller than or equal to the maximum receiving bandwidth of the receiver, the first maximum carrier spacing of the first carrier combination satisfies the bandwidth limitation of the receiver, and if the first maximum carrier spacing of the first carrier combination is larger than the maximum receiving bandwidth of the receiver, the first maximum carrier spacing of the first carrier combination does not satisfy the bandwidth limitation of the receiver.
The receiver bandwidth limitation refers to the maximum receiving bandwidth value of the carrier wave which can be received by a receiver of the terminal, and the terminal can report the maximum receiving bandwidth of the terminal to the base station when accessing the network.
In some embodiments of the present invention, the priority order of the carriers of the first carrier combination is randomly generated according to the priority adjustment period through steps 502 and 503, that is, the priority order randomly generated according to the priority adjustment period is set for each carrier allocated to the terminal by the base station, and the priority orders are adjustable along with the change of the priority adjustment period, when the first maximum carrier spacing of the first carrier combination does not satisfy the receiver bandwidth limitation of the terminal, the carrier with the lowest priority in the first carrier combination is excluded, the number of carriers to be selected is reduced, thereby reducing the complexity of carrier selection,
506. and if the first maximum carrier spacing of the first carrier combination meets the receiver bandwidth limit of the terminal, acquiring the maximum carrier spacing of a second frame in the current radio block period in the first carrier combination as the second maximum carrier spacing of the first carrier combination.
It is determined to subsequently perform step 507, and/or step 509, based on the relationship between the second maximum carrier spacing of the first carrier combination and the receiver bandwidth limit.
507. If the second maximum carrier spacing of the first carrier combination meets the receiver bandwidth limitation of the terminal, the maximum carrier spacing of the remaining frames in the current radio block period in the first carrier combination is obtained, and then step 508 is executed.
508. And if the maximum carrier intervals of the remaining frames in the current radio block period in the first carrier combination all meet the receiver bandwidth limitation of the terminal, taking all carriers included in the first carrier combination as a final result of carrier selection, or if the maximum carrier intervals of any one of the remaining frames in the current radio block period in the first carrier combination do not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination.
Specifically, if the maximum carrier spacing of a first frame in a first carrier combination satisfies the bandwidth limitation of a receiver, then the maximum carrier spacing of a second frame in the current radio block period in the first carrier combination is obtained as the second maximum carrier spacing of the first carrier combination, if the second maximum carrier spacing of the first carrier combination satisfies the receiver bandwidth limitation of the terminal, the maximum carrier spacing of the remaining frames in the current radio block period in the first carrier combination is obtained, and if the maximum carrier spacing of the remaining frames in the current radio block period in the first carrier combination satisfies the receiver bandwidth limitation of the terminal, all carriers included in the first carrier combination are used as the final result of carrier selection. Only the carriers included in the carrier combination when all frames in the current radio block period judge that the bandwidth limitation of the receiver is met are the carrier selection results.
509. And if the second maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination, and acquiring a second carrier combination.
Wherein the second carrier combination is a subset of the first carrier combination, and the missing one element of the second carrier combination compared to the first carrier combination is the carrier with the lowest priority. For example, the base station allocates 3 carriers to the terminal: c0、C1、C2Then, the obtained first carrier combination can be specifically expressed as { C0，C1，C2Suppose that the priority order of 3 carriers can be set to C0＞C1＞C2Then carrier wave C2If the maximum carrier spacing of the first frame in the first carrier combination exceeds the receiver bandwidth limit in step 505, the carrier to be dropped in the first carrier combination should be C2。
It should be noted that, after the second carrier combination is obtained in step 509, obtaining and determining the maximum carrier interval in the second carrier combination on each frame in the current radio block period may also be performed, which is specifically referred to the embodiment shown in fig. 4 and will not be described herein again.
In the embodiment of the invention, a first carrier combination is firstly obtained, then the priority of the carrier of the first carrier combination in a priority adjustment period where a current wireless block period is located is obtained, the maximum carrier interval of a first frame in the current wireless block period in the first carrier combination is next obtained, the first maximum carrier interval of the first carrier combination is obtained, and if the first maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limitation of a terminal, the carrier with the lowest priority is removed from the first carrier combination; or, if the first maximum carrier interval of the first carrier combination meets the receiver bandwidth limit of the terminal, obtaining the maximum carrier interval of the second frame in the current radio block period in the first carrier combination, and if the second maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limit of the terminal, removing the carrier with the lowest priority from the first carrier combination. Therefore, in the embodiment of the present invention, when the maximum carrier spacing of the first frame in the first carrier combination does not satisfy the receiver bandwidth limitation, or when the maximum carrier spacing of the first frame in the first carrier combination satisfies the receiver bandwidth limitation and the maximum carrier spacing of the second frame in the first carrier combination does not satisfy the receiver bandwidth limitation, the carriers included in the first carrier combination may eliminate the carriers with the lowest priority according to the priority, thereby reducing the number of carriers available for selection and reducing the complexity of carrier selection. In addition, since the acquired carrier priorities are the priorities of the carriers of the first carrier combination randomly generated according to the priority adjustment period, the priority order of all the carriers in the first carrier combination can be adjusted along with the change of the priority adjustment period, that is, when the carrier with the lowest priority is selected and removed, a certain carrier is not fixedly removed, but the removed carrier is also changed along with the adjustment of the priority order of all the carriers, because the peak throughputs corresponding to the carriers with different priority orders are greatly different, the total throughput reduction caused by the fixed removal of a certain carrier can be avoided.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
To facilitate a better implementation of the above-described aspects of embodiments of the present invention, the following also provides relevant means for implementing the above-described aspects.
Referring to fig. 6, a carrier selection apparatus 600 according to an embodiment of the present invention, which may be a base station or a terminal, includes: carrier combination acquisition section 601, priority acquisition section 602, carrier interval acquisition section 603, and carrier selection section 604.
A carrier combination obtaining unit 601, configured to obtain a first carrier combination, where the first carrier combination includes all carriers allocated to a terminal by a base station;
a priority obtaining unit 602, configured to obtain a priority of a carrier of the first carrier combination obtained by the carrier combination obtaining unit 601 in a priority adjustment period where a current radio block period is located;
a carrier interval acquiring unit 603, configured to acquire a maximum carrier interval of the first frame in the current radio block period in the first carrier combination acquired by the carrier combination acquiring unit 601, as a first maximum carrier interval of the first carrier combination;
a carrier selecting unit 604, configured to, when the first maximum carrier interval of the first carrier combination acquired by the carrier interval acquiring unit 603 does not meet the receiver bandwidth limitation of the terminal, remove a carrier with a lowest priority from the first carrier combination according to the priority of the carrier of the first carrier combination acquired by the priority acquiring unit 602; or,
a carrier interval obtaining unit 603, further configured to obtain, when a first maximum carrier interval of the first carrier combination meets a receiver bandwidth limit of the terminal, a maximum carrier interval of a second frame in the current radio block period in the first carrier combination obtained by the carrier combination obtaining unit 601, as a second maximum carrier interval of the first carrier combination;
the carrier selecting unit 604 is further configured to remove the carrier with the lowest priority from the first carrier combination if the second maximum carrier interval of the first carrier combination acquired by the carrier interval acquiring unit 603 does not meet the receiver bandwidth limitation of the terminal.
Optionally, the priority adjustment period is a radio block period, and the priority obtaining unit 602 is specifically configured to calculate, according to a frame number of any frame in the current radio block period and the number of carriers of the first carrier combination, a priority of a carrier of the first carrier combination in the priority adjustment period in which the current radio block period is located.
In addition to the embodiment shown in fig. 6, please refer to fig. 7, the carrier selecting apparatus 700 includes: carrier combination acquisition section 601, priority acquisition section 602, carrier interval acquisition section 603, carrier selection section 604, and priority initialization section 605.
A carrier combination obtaining unit 601, configured to obtain a first carrier combination, where the first carrier combination includes all carriers allocated to a terminal by a base station;
a priority initial unit 605, configured to set an initial priority for the carrier of the first carrier combination acquired by the carrier combination acquisition unit 601;
a priority obtaining unit 602, configured to specifically perform left or right cyclic shift on the priority of the carrier of the first carrier combination in a priority adjustment period that is previous to the priority adjustment period in which the current radio block period is located, so as to obtain the priority of the carrier of the first carrier combination in the priority adjustment period in which the current radio block period is located;
a carrier interval acquiring unit 603, configured to acquire a maximum carrier interval of the first frame in the current radio block period in the first carrier combination acquired by the carrier combination acquiring unit 601, as a first maximum carrier interval of the first carrier combination;
a carrier selecting unit 604, configured to, when the first maximum carrier interval of the first carrier combination acquired by the carrier interval acquiring unit 603 does not meet the receiver bandwidth limitation of the terminal, remove a carrier with a lowest priority from the first carrier combination according to the priority of the carrier of the first carrier combination acquired by the priority acquiring unit 602; or,
a carrier interval obtaining unit 603, further configured to obtain, when a first maximum carrier interval of the first carrier combination meets a receiver bandwidth limit of the terminal, a maximum carrier interval of a second frame in the current radio block period in the first carrier combination obtained by the carrier combination obtaining unit 601, as a second maximum carrier interval of the first carrier combination;
the carrier selecting unit 604 is further configured to remove the carrier with the lowest priority from the first carrier combination if the second maximum carrier interval of the first carrier combination acquired by the carrier interval acquiring unit 603 does not meet the receiver bandwidth limitation of the terminal.
Optionally, the carrier combination obtaining unit 601 is further configured to obtain a second carrier combination from the carrier selecting unit 604, where the second carrier combination includes all carriers remaining after the carrier with the lowest priority is removed from the first carrier combination;
a carrier interval obtaining unit 603, further configured to obtain a second maximum carrier interval of the first frame in the current radio block period in the second carrier combination obtained by the carrier combination obtaining unit 601, as a first maximum carrier interval of the second carrier combination;
a carrier selecting unit 604, further configured to remove a carrier with a lowest priority from the second carrier combination when the first maximum carrier interval of the second carrier combination acquired by the carrier interval acquiring unit 603 does not meet the receiver bandwidth limitation of the terminal; or,
the carrier interval obtaining unit 603 is further configured to obtain, when the first maximum carrier interval of the second carrier combination satisfies the receiver bandwidth limitation of the terminal, a maximum carrier interval of the second frame in the second carrier combination in the current radio block period as a second maximum carrier interval of the second carrier combination.
Further, the carrier interval obtaining unit 603 is further configured to obtain a maximum carrier interval of the remaining frames in the current radio block period in the second carrier combination when the second maximum carrier interval of the second carrier combination obtained by the carrier interval obtaining unit 603 meets the receiver bandwidth limitation of the terminal;
the carrier selecting unit 604 is further configured to, when the maximum carrier spacing of the frames remaining in the current radio block period in the second carrier combination, which is obtained by the carrier spacing obtaining unit 603, satisfies the receiver bandwidth limitation of the terminal, take all carriers included in the second carrier combination as a final result of carrier selection, or, when the maximum carrier spacing of any frame in the frames remaining in the current radio block period in the first carrier combination does not satisfy the receiver bandwidth limitation of the terminal, remove a carrier with a lowest priority from the first carrier combination.
In addition to the embodiment shown in fig. 6, please refer to fig. 8, the carrier selecting apparatus 800 includes: carrier combination acquisition section 601, priority acquisition section 602, carrier interval acquisition section 603, and carrier selection section 604.
A carrier combination obtaining unit 601, configured to obtain a first carrier combination, where the first carrier combination includes all carriers allocated to a terminal by a base station;
the priority acquiring unit 602 includes:
a priority random generation subunit 6021 configured to randomly generate a priority order of the carriers of the first carrier combination according to a priority adjustment period;
a priority setting subunit 6022, configured to set the priority of the carrier of the first carrier combination in the priority adjustment period in which the current radio block period is located according to the priority order randomly generated by the priority random generation subunit 6021;
a carrier interval acquiring unit 603, configured to acquire a maximum carrier interval of the first frame in the current radio block period in the first carrier combination acquired by the carrier combination acquiring unit 601, as a first maximum carrier interval of the first carrier combination;
a carrier selecting unit 604, configured to, when the first maximum carrier interval of the first carrier combination acquired by the carrier interval acquiring unit 603 does not meet the receiver bandwidth limitation of the terminal, remove a carrier with a lowest priority from the first carrier combination according to the priority of the carrier of the first carrier combination acquired by the priority acquiring unit 602; or,
a carrier interval obtaining unit 603, further configured to obtain, when a first maximum carrier interval of the first carrier combination meets a receiver bandwidth limit of the terminal, a maximum carrier interval of a second frame in the current radio block period in the first carrier combination obtained by the carrier combination obtaining unit 601, as a second maximum carrier interval of the first carrier combination;
the carrier selecting unit 604 is further configured to remove the carrier with the lowest priority from the first carrier combination if the second maximum carrier interval of the first carrier combination acquired by the carrier interval acquiring unit 603 does not meet the receiver bandwidth limitation of the terminal.
Optionally, the carrier interval obtaining unit 603 is further configured to obtain a maximum carrier interval of the remaining frames in the current radio block period in the first carrier combination when the second maximum carrier interval of the first carrier combination obtained by the carrier interval obtaining unit 603 meets a receiver bandwidth limit of the terminal;
the carrier selecting unit 604 is further configured to, when the maximum carrier interval of the remaining frames in the current radio block period, which is obtained by the carrier interval obtaining unit 603, in the first carrier combination all meets the receiver bandwidth limitation of the terminal, take all carriers included in the first carrier combination as a final result of carrier selection.
As can be seen from the carrier selection devices shown in fig. 6 to 8, first, a first carrier combination is obtained, then, the priority of the carrier of the first carrier combination in a priority adjustment period where a current radio block period is located is obtained, next, the maximum carrier interval of a first frame in the current radio block period in the first carrier combination is obtained, so as to obtain the first maximum carrier interval of the first carrier combination, and if the first maximum carrier interval of the first carrier combination does not satisfy the receiver bandwidth limitation of the terminal, the carrier with the lowest priority is removed from the first carrier combination; or, if the first maximum carrier interval of the first carrier combination meets the receiver bandwidth limit of the terminal, obtaining the maximum carrier interval of the second frame in the current radio block period in the first carrier combination, and if the second maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limit of the terminal, removing the carrier with the lowest priority from the first carrier combination. Therefore, in the embodiment of the present invention, when the maximum carrier spacing of the first frame in the first carrier combination does not satisfy the receiver bandwidth limitation, or when the maximum carrier spacing of the first frame in the first carrier combination satisfies the receiver bandwidth limitation and the maximum carrier spacing of the second frame in the first carrier combination does not satisfy the receiver bandwidth limitation, the carriers included in the first carrier combination may eliminate the carriers with the lowest priority according to the priority, thereby reducing the number of carriers available for selection and reducing the complexity of carrier selection. In addition, since the acquired carrier priority is the priority of the carrier of the first carrier combination in the priority adjustment period of the current radio block period, that is, the priority order of all carriers in the first carrier combination can be adjusted along with the change of the priority adjustment period, when the carrier with the lowest priority is selected and removed, a certain carrier is not fixedly removed, but the removed carrier is also changed along with the adjustment of the priority order of all carriers, because the peak throughput corresponding to the carriers with different priority orders is greatly different, the total throughput reduction caused by fixedly removing a certain carrier can be avoided.
It should be noted that, because the contents of information interaction, execution process, and the like among the modules/units included in the apparatus 600, the apparatus 700, and the apparatus 800 are based on the same concept as the method embodiment of the present invention, the technical effect brought by the contents is the same as the method embodiment of the present invention, and specific contents may refer to the descriptions in the method embodiments shown in fig. 2 to 5 of the present invention, and are not described herein again.
An embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a program that executes some or all of the arrangements described in the above method embodiments.
Next, another carrier selection apparatus provided in an embodiment of the present invention is described, which can be used to execute the method embodiments shown in fig. 2 to 5, please refer to fig. 9, in which the carrier selection apparatus 900 includes:
an input device 901, an output device 902, a processor 903 and a memory 904 (wherein the number of the processors 903 in the carrier selection device 900 may be one or more, and one processor is taken as an example in fig. 9). In some embodiments of the present invention, the input device 901, the output device 902, the processor 903 and the memory 904 may be connected by a bus or other means, wherein the connection by the bus is exemplified in fig. 9.
The processor 903 is configured to execute the following steps: acquiring a first carrier combination, wherein the first carrier combination comprises all carriers distributed to a terminal by the base station; acquiring the priority of the carrier wave of the first carrier wave combination in the priority regulation period of the current wireless block period; acquiring the maximum carrier interval of a first frame in the current wireless block period in the first carrier combination as the first maximum carrier interval of the first carrier combination; if the first maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination; or, if the first maximum carrier spacing of the first carrier combination satisfies the receiver bandwidth limitation of the terminal, acquiring the maximum carrier spacing of the second frame in the current radio block period in the first carrier combination as the second maximum carrier spacing of the first carrier combination, and if the second maximum carrier spacing of the first carrier combination does not satisfy the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination.
In some embodiments of the invention, the processor 903 is further configured to perform the following steps: acquiring a second carrier combination, wherein the second carrier combination comprises all carriers left after the carrier with the lowest priority is removed from the first carrier combination; acquiring the maximum carrier interval of a first frame in the current wireless block period in the second carrier combination as the first maximum carrier interval of the second carrier combination; if the first maximum carrier interval of the second carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the second carrier combination; or, if the first maximum carrier spacing of the second carrier combination meets the receiver bandwidth limitation of the terminal, acquiring the maximum carrier spacing of the second frame in the second carrier combination in the current radio block period as the second maximum carrier spacing of the second carrier combination.
In some embodiments of the invention, the processor 903 is further configured to perform the following steps: if the second maximum carrier interval of the second carrier combination meets the receiver bandwidth limitation of the terminal, obtaining the maximum carrier interval of the frames left in the current radio block period in the second carrier combination, and if the maximum carrier intervals of the frames left in the current radio block period in the second carrier combination all meet the receiver bandwidth limitation of the terminal, taking all carriers included in the second carrier combination as a final result of carrier selection.
In some embodiments of the invention, the processor 903 is specifically configured to perform the following steps: if the second maximum carrier interval of the first carrier combination meets the receiver bandwidth limitation of the terminal, obtaining the maximum carrier interval of the frames left in the current radio block period in the first carrier combination, and if the maximum carrier intervals of the frames left in the current radio block period in the first carrier combination all meet the receiver bandwidth limitation of the terminal, taking all carriers included in the first carrier combination as a final result of carrier selection, or if the maximum carrier interval of any one of the frames left in the current radio block period in the first carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination.
In some embodiments of the invention, the processor 903 is specifically configured to perform the following steps: setting an initial priority for the carriers of the first carrier combination; and circularly shifting the priority of the carrier of the first carrier combination in the priority adjustment period which is one priority adjustment period before the current wireless block period to the left or the right so as to acquire the priority of the carrier of the first carrier combination in the priority adjustment period which is the current wireless block period.
In some embodiments of the invention, the processor 903 is specifically configured to perform the following steps: randomly generating a priority order of the carriers of the first carrier combination according to a priority adjustment period; and setting the priority of the carrier wave of the first carrier wave combination in the priority regulation period of the current wireless block period according to the priority sequence generated randomly.
In some embodiments of the present invention, the priority adjustment period is a radio block period, and the processor 903 is specifically configured to perform the following steps: and calculating the priority of the carrier wave of the first carrier wave combination in the priority adjustment period in which the current wireless block period is positioned according to the frame number of any frame in the current wireless block period and the number of the carrier waves of the first carrier wave combination.
It will be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiments may be implemented by hardware that is related to instructions of a program, and the program may be stored in a computer-readable storage medium, where the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
While the carrier selection method and the related apparatus provided by the present invention have been described in detail above, for those skilled in the art, according to the idea of the embodiment of the present invention, the specific implementation and the application scope may be changed, and therefore, the content of the present specification should not be construed as limiting the present invention.

Claims (21)

1. A method for carrier selection, comprising:
acquiring a first carrier combination, wherein the first carrier combination comprises all carriers distributed to a terminal by a base station; acquiring the priority of the carrier wave of the first carrier wave combination in the priority regulation period of the current wireless block period;
acquiring the maximum carrier interval of a first frame in the current wireless block period in the first carrier combination as the first maximum carrier interval of the first carrier combination;
if the first maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination; or,
if the first maximum carrier interval of the first carrier combination meets the receiver bandwidth limitation of the terminal, acquiring the maximum carrier interval of a second frame in the current radio block period in the first carrier combination as the second maximum carrier interval of the first carrier combination, and if the second maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination.
2. The method of claim 1, wherein the removing the lowest priority carrier from the first combination of carriers further comprises:
acquiring a second carrier combination, wherein the second carrier combination comprises all carriers left after the carrier with the lowest priority is removed from the first carrier combination;
acquiring the maximum carrier interval of a first frame in the current wireless block period in the second carrier combination as the first maximum carrier interval of the second carrier combination;
if the first maximum carrier interval of the second carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the second carrier combination; or,
and if the first maximum carrier interval of the second carrier combination meets the receiver bandwidth limit of the terminal, acquiring the maximum carrier interval of a second frame in the second carrier combination in the current wireless block period as the second maximum carrier interval of the second carrier combination.
3. The method of claim 2, wherein obtaining the maximum carrier spacing of the second frame in the current radio block period in the second carrier combination as the second maximum carrier spacing of the second carrier combination further comprises:
if the second maximum carrier interval of the second carrier combination meets the receiver bandwidth limitation of the terminal, obtaining the maximum carrier interval of the frames left in the current radio block period in the second carrier combination, and if the maximum carrier intervals of the frames left in the current radio block period in the second carrier combination all meet the receiver bandwidth limitation of the terminal, taking all carriers included in the second carrier combination as a final result of carrier selection.
4. The method of claim 1, wherein obtaining the maximum carrier spacing of the second frame in the current radio block period in the first carrier combination as the second maximum carrier spacing of the first carrier combination further comprises:
if the second maximum carrier interval of the first carrier combination meets the receiver bandwidth limitation of the terminal, obtaining the maximum carrier interval of the frames left in the current radio block period in the first carrier combination, and if the maximum carrier intervals of the frames left in the current radio block period in the first carrier combination all meet the receiver bandwidth limitation of the terminal, taking all carriers included in the first carrier combination as a final result of carrier selection, or if the maximum carrier interval of any one of the frames left in the current radio block period in the first carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination.
5. The method according to any of claims 1 to 4, wherein before the obtaining the priority of the carrier of the first carrier combination in the priority adjustment period in which the current radio block period is located, the method further comprises: setting an initial priority for the carriers of the first carrier combination;
the obtaining the priority of the carrier of the first carrier combination in the priority adjustment period where the current radio block period is located includes:
and circularly shifting the priority of the carrier of the first carrier combination in the priority adjustment period which is one priority adjustment period before the current wireless block period to the left or the right so as to acquire the priority of the carrier of the first carrier combination in the priority adjustment period which is the current wireless block period.
6. The method according to any of claims 1 to 4, wherein the obtaining the priority of the carrier of the first carrier combination in the priority adjustment period in which the current radio block period is located comprises:
randomly generating a priority order of the carriers of the first carrier combination according to a priority adjustment period;
and setting the priority of the carrier wave of the first carrier wave combination in the priority regulation period of the current wireless block period according to the priority sequence generated randomly.
7. The method according to any of claims 1 to 4, wherein the priority adjustment period is a radio block period, and the obtaining the priority of the carrier of the first carrier combination in the priority adjustment period in which the current radio block period is located comprises:
and calculating the priority of the carrier wave of the first carrier wave combination in the priority adjustment period in which the current wireless block period is positioned according to the frame number of any frame in the current wireless block period and the number of the carrier waves of the first carrier wave combination.
8. A carrier selection apparatus, comprising:
a carrier combination obtaining unit, configured to obtain a first carrier combination, where the first carrier combination includes all carriers allocated to a terminal by a base station;
a priority obtaining unit, configured to obtain a priority of a carrier of the first carrier combination obtained by the carrier combination obtaining unit in a priority adjustment period in which a current radio block period is located;
a carrier interval obtaining unit, configured to obtain a maximum carrier interval of a first frame in the current radio block period in the first carrier combination obtained by the carrier combination obtaining unit, where the maximum carrier interval is used as a first maximum carrier interval of the first carrier combination;
a carrier selecting unit, configured to remove a carrier with a lowest priority from the first carrier combination according to the priority of the carrier of the first carrier combination acquired by the priority acquiring unit when the first maximum carrier interval of the first carrier combination acquired by the carrier interval acquiring unit does not meet the receiver bandwidth limitation of the terminal; or,
the carrier interval acquiring unit is further configured to acquire, when a first maximum carrier interval of the first carrier combination satisfies a receiver bandwidth limit of the terminal, a maximum carrier interval of a second frame in the current radio block period in the first carrier combination acquired by the carrier combination acquiring unit, as a second maximum carrier interval of the first carrier combination;
the carrier selecting unit is further configured to remove a carrier with a lowest priority from the first carrier combination if the second maximum carrier interval of the first carrier combination acquired by the carrier interval acquiring unit does not satisfy the receiver bandwidth limitation of the terminal.
9. The apparatus of claim 8,
the carrier combination obtaining unit is further configured to obtain a second carrier combination from the carrier selection unit, where the second carrier combination includes all carriers remaining after the carrier with the lowest priority is removed from the first carrier combination;
the carrier interval acquiring unit is further configured to acquire a second maximum carrier interval of the first frame in the current radio block period in the second carrier combination acquired by the carrier combination acquiring unit, as a first maximum carrier interval of the second carrier combination;
the carrier selecting unit is further configured to remove a carrier with a lowest priority from the second carrier combination when the first maximum carrier interval of the second carrier combination acquired by the carrier interval acquiring unit does not satisfy the receiver bandwidth limitation of the terminal; or,
the carrier interval obtaining unit is further configured to obtain, when the first maximum carrier interval of the second carrier combination satisfies a receiver bandwidth limit of the terminal, a maximum carrier interval of the second frame in the second carrier combination in the current radio block period as a second maximum carrier interval of the second carrier combination.
10. The apparatus of claim 9,
the carrier interval acquiring unit is further configured to acquire a maximum carrier interval of the remaining frames in the current radio block period in the second carrier combination when the second maximum carrier interval of the second carrier combination acquired by the carrier interval acquiring unit meets the receiver bandwidth limit of the terminal;
the carrier selecting unit is further configured to, when the maximum carrier interval of the remaining frames in the current radio block period, obtained by the carrier interval obtaining unit, in the second carrier combination all meets the receiver bandwidth limitation of the terminal, take all carriers included in the second carrier combination as a final result of carrier selection.
11. The apparatus of claim 8,
the carrier interval acquiring unit is further configured to acquire a maximum carrier interval of the remaining frames in the current radio block period in the first carrier combination when the second maximum carrier interval of the first carrier combination acquired by the carrier interval acquiring unit meets a receiver bandwidth limit of the terminal;
the carrier selecting unit is further configured to, when the maximum carrier interval of the remaining frames in the current radio block period obtained by the carrier interval obtaining unit in the first carrier combination satisfies the receiver bandwidth limitation of the terminal, take all carriers included in the first carrier combination as a final result of carrier selection, or, when the maximum carrier interval of any one of the remaining frames in the current radio block period in the first carrier combination does not satisfy the receiver bandwidth limitation of the terminal, remove a carrier with a lowest priority from the first carrier combination.
12. The apparatus according to any of claims 8 to 11, wherein the carrier selection apparatus further comprises:
a priority initial unit, configured to set an initial priority for the carrier of the first carrier combination acquired by the carrier combination acquisition unit;
the priority obtaining unit is specifically configured to cyclically shift the priority of the carrier of the first carrier combination in a priority adjustment period that is previous to the priority adjustment period in which the current radio block period is located to the left or the right, so as to obtain the priority of the carrier of the first carrier combination in the priority adjustment period in which the current radio block period is located.
13. The apparatus according to any one of claims 8 to 11, wherein the priority acquisition unit comprises:
a priority random generation subunit, configured to randomly generate a priority order of the carriers of the first carrier combination according to a priority adjustment period;
a priority setting subunit, configured to set, according to the priority order randomly generated by the priority random generation subunit, the priority of the carrier of the first carrier combination in the priority adjustment period in which the current radio block period is located.
14. The apparatus according to any one of claims 8 to 11, wherein the priority adjustment period is a radio block period, and the priority obtaining unit is specifically configured to calculate, according to a frame number of any one frame in the current radio block period and the number of carriers of the first carrier combination, a priority of a carrier of the first carrier combination in the priority adjustment period in which the current radio block period is located.
15. A carrier selection apparatus, comprising: an input device, an output device, a memory, and a processor;
wherein the processor performs the steps of:
acquiring a first carrier combination, wherein the first carrier combination comprises all carriers distributed to a terminal by the base station;
acquiring the priority of the carrier wave of the first carrier wave combination in the priority regulation period of the current wireless block period;
acquiring the maximum carrier interval of a first frame in the current wireless block period in the first carrier combination as the first maximum carrier interval of the first carrier combination;
if the first maximum carrier interval of the first carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination; or,
if the first maximum carrier interval of the first carrier combination meets the receiver bandwidth limitation of the terminal, acquiring the maximum carrier interval of a second frame in the current radio block period in the first carrier combination as the second maximum carrier interval of the first carrier combination, and if the second maximum carrier interval of the first carrier combination acquired by the carrier interval acquisition unit does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination.
16. The apparatus of claim 15, wherein the processor is further configured to perform the steps of:
acquiring a second carrier combination, wherein the second carrier combination comprises all carriers left after the carrier with the lowest priority is removed from the first carrier combination;
acquiring the maximum carrier interval of a first frame in the current wireless block period in the second carrier combination as the first maximum carrier interval of the second carrier combination;
if the first maximum carrier interval of the second carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the second carrier combination; or,
and if the first maximum carrier interval of the second carrier combination meets the receiver bandwidth limit of the terminal, acquiring the maximum carrier interval of a second frame in the second carrier combination in the current wireless block period as the second maximum carrier interval of the second carrier combination.
17. The apparatus of claim 16, wherein the processor is further configured to perform the steps of:
if the second maximum carrier interval of the second carrier combination meets the receiver bandwidth limitation of the terminal, obtaining the maximum carrier interval of the frames left in the current radio block period in the second carrier combination, and if the maximum carrier intervals of the frames left in the current radio block period in the second carrier combination all meet the receiver bandwidth limitation of the terminal, taking all carriers included in the second carrier combination as a final result of carrier selection.
18. The apparatus of claim 15, wherein the processor is further configured to perform the steps of:
if the second maximum carrier interval of the first carrier combination meets the receiver bandwidth limitation of the terminal, obtaining the maximum carrier interval of the frames left in the current radio block period in the first carrier combination, and if the maximum carrier intervals of the frames left in the current radio block period in the first carrier combination all meet the receiver bandwidth limitation of the terminal, taking all carriers included in the first carrier combination as a final result of carrier selection, or if the maximum carrier interval of any one of the frames left in the current radio block period in the first carrier combination does not meet the receiver bandwidth limitation of the terminal, removing the carrier with the lowest priority from the first carrier combination.
19. The apparatus according to any of the claims 15 to 18, wherein the processor is specifically configured to perform the steps of:
setting an initial priority for the carriers of the first carrier combination;
and circularly shifting the priority of the carrier of the first carrier combination in the priority adjustment period which is one priority adjustment period before the current wireless block period to the left or the right so as to acquire the priority of the carrier of the first carrier combination in the priority adjustment period which is the current wireless block period.
20. The apparatus according to any of the claims 15 to 18, wherein the processor is specifically configured to perform the steps of:
randomly generating a priority order of the carriers of the first carrier combination according to a priority adjustment period;
and setting the priority of the carrier wave of the first carrier wave combination in the priority regulation period of the current wireless block period according to the priority sequence generated randomly.
21. The apparatus according to any of claims 15 to 18, wherein the priority adjustment period is a radio block period, and wherein the processor is configured to perform the following steps:
and calculating the priority of the carrier wave of the first carrier wave combination in the priority adjustment period in which the current wireless block period is positioned according to the frame number of any frame in the current wireless block period and the number of the carrier waves of the first carrier wave combination.
CN201380000742.8A 2013-05-07 2013-05-07 Carrier wave selection method and associated apparatus Pending CN104813728A (en)

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Application publication date: 20150729