JP3207135B2 - Dynamic channel assignment method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to wireless communications, and more particularly to dynamic channel assignment.

[0002]

BACKGROUND OF THE INVENTION Wireless access provides mobile users with access without the use of communication lines, especially to solve the demands of two areas: telephone and indoor data LANs. It was done. Cellular telephone (cellular phone) networks have expanded the area of telephone services via wireless last hop, while mobile IPLANs (eg, AT &T's WaveL
AN, Proxim's RangeLAN) is also TCP
The same function is provided to indoor users of the / IP data network. Wireless technology advances and priority networking for high-speed integrated services are expected to provide mobile users with comprehensive multimedia information access in the near future.

[0003] PCS services (Personal Communication Services) cover a wide range of personalized communication services that allow individuals or devices to communicate anytime, regardless of location. I have. Personal Communication Network (PC
N)) is a new type of wireless telephone system that communicates via a low power antenna. PCN is
It provides a digital wireless system that replaces the conventional wired system.

As the cellular mobile radio moves from one cell to another, the transmitted signal is handed off to the next cell by a controller which determines which cell is receiving the strongest signal. Because the cellular telephone user is closer to the base station transceiver than conventional mobile communications, the cellular telephone user's transceiver has less power and therefore the equipment is cheaper.

[0005] For non-cellular radios, the greatest advantage of the cellular concept is that higher capacity is allowed for the same frequency allocation. The advantage is cost,
The need for a large number of cell sites is also found in the associated radio ports. Switching from one cell site to an adjacent cell site requires accurate knowledge of radio port availability and location.

[0006] Cellular and PCS technologies based on time division multiple access (TDMA) and frequency division multiple access (FDMA) require some form of channel allocation system to divide the spectrum between users. In earlier systems, the channel assignment was based on a fixed channel reuse plan. This fixed channel assignment (Fi
xed Channel Assignment (FCA) is known to work satisfactorily for uniform and heavy traffic.

However, a channel assignment system that assigns channels dynamically without a uniform traffic pattern has the potential to provide more efficient services to users. This FCA is relatively simple to implement, but requires good cell site engineering and manual processes when installing the system.
For these reasons, spectrum management in cellular systems is moving in the direction of dynamic channel allocation.

[0008] In order to improve the overall quality of operation of a cell site, it is desirable to automatically allocate channels within a cell to optimize its performance. Some sources of channel interference are long-lasting, such as regional characteristics, system deployment (including base station layout, antenna type and shape, etc.) and fixed spectrum, and other types of Channel interference is short-lived, for example, traffic patterns, interference, or shadow fading.

[0009]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a dynamic channel assignment for wireless networks, in particular dynamic channel assignment with complete automation and simple system growth and high capacity. Is to provide the law.

[0010]

According to the present invention, an interference-based dynamic channel allocation method for wireless communication networks is provided by the method as defined in claim 1. Furthermore, according to the present invention, claim 2
The method is as described above.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to a mobile telephone (portable telephone) system, but is applicable to other cellular systems such as PCS and indoor wireless systems.

In FIG. 1, a mobile telephone exchange (MTS)
O) 10 performs call switching between the cellular network and the switched wired network 12; MTSO10
Controls the overall operation of the cellular system. For example, it can set up and monitor all cellular calls, track the location of mobile phones with mobile phones passing through all systems, provide handoff capabilities, and provide billing information. M
The TSO 10 is connected to a plurality of base stations 14.

The base station 14 is connected to an antenna 16 via a wireless port by a fixed transceiver in a wireless network. The base station 14 includes a plurality of transceiver ports 22. This transceiver port 22 is assigned to a channel. The geographical area in which the base station functions as a gateway is referred to as a cell 18 and the nodes of the various base stations 14 are distributed and located at appropriate locations. The mobile communication device 20 communicates with the base station 14 in the cell 18 via a pair of assigned channels consisting of an uplink frequency and a downlink frequency.

The present invention is an interference-based dynamic channel assignment system that can provide full automation, easy system growth, and potentially high capacity when compared to FCA. In addition to being applicable to variations in traffic, radio links, interference shadow fading, etc., the system is also adaptable to geographic features, fixed spectrum, system deployment, and system growth.

The present invention deals with two temporal scales applying interference. These time scales are long term variations in measurement (caused by geographic features, system deployment, fixed spectrum, etc.) and fast short term variations (caused by traffic patterns, radio links, interference shadow fading, etc.). Further, the present invention is globally distributed on a per cell / sector basis (on a cell / sector basis).

FIG. 2 is a diagram showing a cell / sector channel list. Dynamic channel assignment schemes use uplink and downlink based interference measures. This system orders the channels of each cell 18 based on the interference measures formed within the cell 18 in two simultaneous processes, a long-term and a short-term process. This interference-based dynamic channel assignment is distributed in that each cell 18 (or sector) has a long-term process and a short-term process.

This long-term process orders the entire spectrum for each cell based on a moving average of the interference measures forming the long-term list for both uplink and downlink channel assignments. This moving average is used by the long-term process so that it can adapt to slow (ie, long-term) variations in system features such as geographic features, system deployment, system growth, fixed spectrum, and the like.

The short-term process forms a short-term list, ordering only a certain number of channels that are considered optimal by the long-term process. This short-term process uses instantaneous interference measures to order channels and adapts to fast (ie, short-term) variations in the system such as, for example, traffic patterns, radio links, interference, and shadow fading. The two long-term and short-term processes organize the channel for each cell (or sector) and support a robust dynamic channel assignment procedure.

System and Model Notation TDMA and FDMA systems are referred to as digital and analog systems, respectively. The carrier-to-interference ratio (Ca) of the receiver for the ith channel pair on the uplink and downlink
rrier to Interference Ratio (CIR)) is represented by γ ⁽ⁱ⁾ _U and γ ⁽ⁱ⁾ _D , respectively.

[0020] CI for uplink and downlink
Minimum allowed value of R respectively shall be indicated by gamma _U and gamma _D. Then the value of gamma _U and gamma _D is determined by the type of receivers in the system, it takes a value in the range of usually 11-25DB. Received signal strength (R) on the ith channel pair for the uplink and downlink
SS)) are represented by RSS ⁽ⁱ⁾ _U and RSS ⁽ⁱ⁾ _D , respectively.
The corresponding moving average RSS (MARSS) values are represented by MARSS ⁽ⁱ⁾ _U and MARSS ⁽ⁱ⁾ _D , respectively.

Let the interference thresholds on the uplink and downlink be denoted by I _U and I _D , respectively. And I _U
And I _D are given by the following equations. I _U = G _A P _U G _B / Γ _U (1) I _D = G _A P _D G _B / Γ _D (2) where G _A is a constant including the antenna gain, and G _B is the center of the cell. And the worst link gain between the power and the boundary, and P _U and P _D are the uplink and downlink transmission powers, respectively.

The bit error rates (BER) on the i-th channel pair in the uplink and downlink shall be denoted by BER ⁽ⁱ⁾ _U and BER ⁽ⁱ⁾ _D , respectively. Furthermore, the maximum allowable BER on the uplink and downlink
BER _U and BER _D , respectively, which are typically set to 10 ^-3 for voice traffic.

Interference-based dynamic channel assignment Interference-based dynamic channel assignment
Based Dynamic Channel Assignment (IBDCA)
The system consists of signal measurement, channel ordering, call admission, channel assignment, call maintenance, call handoff, system /
Consists of a cell startup procedure. This IB
The DCA system forms signal measurements in each cell 18 (or sector) on the uplink and downlink (the capacity of the downlink measurement is only present in digital systems).

Based on the uplink and downlink measurements, the channels are ordered by long-term and short-term processes in each cell. For example, when a call arrives at cell 18, certain admission and blocking conditions are applied to determine if the call should be accepted. When the call is accepted, a channel is assigned to the call based on certain channel assignment conditions. When a call is placed on this assigned channel, the call is monitored and handed over to another channel if necessary to maintain communication quality.

Signal Measurement and Prediction Two types of prediction are performed from signal measurements. That is, (1)
The received signal strength (RSS) and (2) the carrier-to-interference ratio (CIR). This RSS prediction is used in the channel ordering procedure. CIR prediction is for call authorization,
Used in handoff and channel allocation procedures.

The RSS prediction is made only based on the currently inactive channel in the cell 18. A pair of frequencies is assigned to the call. One provides the uplink (the link from the mobile communication device 20 to the base station 14) and the other frequency provides the downlink (the link from the base station 14 to the mobile communication device 20). Forming this frequency pair is predefined and this pair is referred to as a channel. Therefore, it is desirable to measure not only the uplink but also the downlink and make a channel assignment decision. In current systems, time slots are not synchronized between cells and the TDMA carrier on the downlink is off only when all time slots are idle.

When the RSS measurement process is based on frequency, the measurements and sequencing in the IBDCA system is frequency based. In this case, the RSS measurement period must cover the entire cycle of the time slot on the carrier. On the other hand, when the RSS measurement process is based on a time slot basis, the measurement, ordering and channel assignment of the IBDCA system are based on the time slot basis.

Therefore, the following four combinations exist. (1) Long-term processes are frequency-based, and short-term processes are also frequency-based. (2) Long-term processes are frequency-based, short-term processes are time slot-based. (3) Long-term processes are time-slot-based, short-term processes are frequency-based. (4) The long-term process is based on a time slot, and the short-term process is also based on a time slot. One of these four combinations is used in the IBDCA algorithm to fit a particular system considering the following:

[0029] The radio unit at base station 14 transmits the R on the uplink in both digital and analog modes.
SSI can be measured. As described above, since the RSS measurement process is based on frequency, the measurement period of each RSS prediction on the uplink must span the entire cycle of a time slot on frequency. It can be longer if necessary. Each RSS
In order to calculate the prediction, the number of RSSI samples must be taken uniformly over this measurement period.

The RSS prediction is then
Calculated as a function of SI samples. The advantage of the above meter over the measurement of signal strength is that it is distributed throughout. That is, no central adjustment is needed to check frequency usage to identify and discard measurements made in idle time slots of active frequencies. However, this involves extra processing costs and delays in measuring the signal. The reason is,
This is because the measurement period has a length equal to at least the entire cycle of the time slot on the carrier.

In the downlink, it is turned off only when all the time slots on the carrier are idle. Thus, the RSSI samples that fall into the idle time slots of the frequency reflect interference from the frequency. The measurement period of the RSS prediction on the downlink does not span the entire cycle of the time slot on the frequency. The mobile communication device 20 in the digital mode can perform RSSI measurements on a set of channels specified by the base station in both active and inactive states.

During the active mode (the call is in progress), the mobile communication device 20 performs a mobile assisted handoff (Mobile Assisted Ha
RSS as part of a process called nd-Off (MAHO))
An I measurement can be made. When the mobile station is in the inactive mode (not busy), the mobile assist channel assignment (Mobi
le Assisted Channel Assignment (MACA)) can measure RSSI. RSS of downlink frequency using special radio equipment at base station 14
An I measurement is made.

Predicted CIR on uplink before return of call
Is predicted by the Reverse Control Channel
l (RCCH)) based on the RSS measured at the base station
It is obtained by dividing the predicted value by the instantaneous uplink RSS value of the channel, taking into account:

The CIR on the downlink is the RSS measured at the base station on the RCCH (using an appropriate adjustment factor for the radio link that is an approximation of the downlink signal strength).
The predicted value is measured on a channel considered by the mobile communication device 20 and R is notified to the base station 14 as a MACA notification.
By dividing by the SSI value, prediction can be made before the start of a call.

Channel Ordering Channel ordering within each cell is performed by two processes: a long-term process and a short-term process. The long-term process adapts to low speeds (long-term fluctuations) in the system, such as geographic features, system deployment, system growth, and fixed spectrum as shown in FIG. On the other hand, the short-term process adapts to high speed (short-term fluctuations) in the system such as traffic, radio link, interference, shadow fading as shown in FIG. As described above, RSS measurements for both long-term and short-term processes in cell 18 are made on channels in cell 18 that are not currently active.

This long-term process, as shown in FIG.
Order the entire spectrum based on the moving average RSS value for the cell under consideration. This channel is a moving average RS
They are arranged in order of increasing S value. There is a need to maintain separate moving averages at different times corresponding to different levels of traffic density. For example, night traffic
Unlike daytime traffic, individual moving averages are required for daytime and nighttime.

The moving average needs to be maintained for each time or a certain moving average value that is updated only during busy times, and this value is used to order the channels. There is a need. Let k be the index of the time at which the RSS measurement is made, ie, RS
S ⁽ⁱ⁾ _U (k) and RSS ⁽ⁱ⁾ _D (k) are the RSS measurements made at the k-th time of the i-th channel for the uplink and downlink, respectively.

W _U (.) And W _D (.) Represent the weights of the uplink and downlink, respectively, and their values are functions of RSS ⁽ⁱ⁾ _U (k) and RSS ⁽ⁱ⁾ _D (k), respectively. It is. The weight of the weight is an interference penalty function of the RSS value. That is, the weights are adjusted so that when the interference RSS is low, the moving average is reduced at the required rate, and when the interference RSS is high, the moving average is increased at the required rate.

The moving average for the uplink and the downlink is expressed by the following equation.

(Equation 1)

(Equation 2) Here, K represents the length of the moving average window, and MAX
MA _U and MAXMA _D are the maximum values taken for the uplink and downlink, respectively.

The short-term process, by ordering the long-term process shown in FIG. 3 as shown in FIG.
Order only _s . Channel short list of length n _s (for for uplink and downlink), MARSS ⁽ⁱ⁾ _D is less I _D for MARSS ⁽ⁱ⁾ _U is I _U following downlink for uplink If the channel is available on all the way to the cell 18 boundary,

(Equation 3) It is.

It is desirable to apply this condition when the cellular or PCS is moving at high speed. In fixed cellular or PCS where mobility is low, this condition is not desirable from the point of view of achieving an effective dose.
Thus, the long-term process reduces the burden on the short-term process of measuring the channel. In the short-term process, the channels are arranged in order of increasing RSS prediction. Thus, the short-term process provides the cell with an optimal channel (ie, an ordered short-term list) in the channel assignment procedure.

The same locate receiver (a receiver that measures RSS) works for both short-term and long-term processes. The first priority in this measurement is given to the short-term process. However, RSS measurements made in the short-term process are used by the long-term process with a moving average for the channel under consideration. After spending on the short-term process, the remaining capacity of the locate receiver can be used to make measurements for the long-term process.

Returning to FIG. 2, each cell / sector has an entire spectrum (long-term lists for uplink and downlink) ordered by the long-term process and a short-term list ordered by the short-term process.

When used, the cell-site's Auto-Tune Combiners (ATC) provide a radio and an AT when it takes several seconds to tune to a new channel.
Preferably, C is continuously tuned to the currently optimal channel according to short-term ordering. A hysteresis factor is introduced because there is no ATC to switch channels frequently (i.e., the difference between the instantaneous RSS values of the optimal channel and the next best channel is above the hysteresis threshold before the switch is made). There must be).

Call Granting and Blocking When all transceiver ports 22 at the cell site are busy, the call is blocked at cell 18. If this call is not blocked (ie, transceiver port 22
The call is admitted based on the following criteria (if a call is available for the call): Let n _s be the number of channels in the short-term list.

If the channel i exists under the following conditions, the TDMA call is permitted.

(Equation 4) Here, ΔΓ _U and ΔΓ _D are extra margins introduced to control system performance. Increasing these margins increases blocking and reduces drops. The resulting margin gives the operator soft control over blocking and dropping in the system.

When a channel i exists as in the following equation, an analog call is permitted.

(Equation 5)

The number of channels in the short-term list to which calls are allowed based on the channel assignment permission condition is denoted by n ⁰ _s . When a call is admitted, the optimal channel assigned to the call is determined based on the following criteria. For TDMA calls, the resulting idle slots are assigned to active calls. Otherwise, assign the slot to the kth channel,
This is shown by the following equation.

(Equation 6) For an analog call, it is assigned to the k-th channel in the following case.

(Equation 7)

Before a call is assigned to a selected channel, a final instantaneous RSS measurement is made on the selected channel, and the above-mentioned admission conditions apply. At the same time check is MTSO (CS to CS message)
To avoid collision of channel assignments (i.e., instantaneous channel assignment at the first tier cell site). If the selected channel does not satisfy the grant condition and conflicts with another assignment, the process is repeated for several sub-optimal channels in the short-term list.

Call maintenance Existing handoff procedures based on call quality are applied. However, handoffs that work with the IBDCA system use the resulting C / I measure in addition to BER, and thus provide potentially better performance.

System and Cell Startup When the entire system starts up and there is no fixed spectrum in use, all channels in the long and short lists occupy the same position in all cells. Then, when a new call comes into the system, the new call will take any channel (eg, according to the number of the channel sequence specified by the operator) with the checks made in the MTSO,
Avoid instantaneous collisions in channel assignment. These starting channel assignments reflect a long-term measure in the system. The long-term sequencing in cell 18 starts in this way and evolves over time to adapt to system characteristics.

For a cell 18 using ATC, the algorithm for initial channel selection (until the long-term list is expanded and produces a short-term list of preferred channels for the cell under consideration) is as follows. (1) Start of IBDCA (2) first_channel = [(CS number * # sectors / cell) + sector + 1] MOD # channels / application + 1 (3) old_channel = first_channel (where omni (all) cells , Sector = 0, in case of alpha sector, sector = 0, in case of beta sector, sector = 1, in case of gamma sector, sector = 2, is made for the control channel in which the adjustment is stored.) (4) next_channel = [Old_channel + Y + X] MOD # channels / application (where X is an integer margin to provide flexibility to skip channels, Y is an integer channel separation requirement, and MOD is # Sectors / cell is the number of sectors per cell, and # channels / application is the number of channels per application.) (Note: Here, fixed channel assignments, eg, DCCH, analog Control channel, other To exist channel is needed locally adjusted in order to skip) (5) old_channel = next_channel (6) all subsequent channel allocation, to repeat steps (4) and (5).

In the case of system growth (ie, the addition of a new cell), some time is required before long-term sequencing adds to system characteristics and stabilizes. However, the above algorithm can be used for startup in the case of a cell 18 using ATC.

The handoff process interacts closely with the IBDCA system. Handoff channels are stored in a dynamic channel environment. Selecting a channel at a new base station for handoff and channel assignment IBD
CA system is used.

Discussion See the standard IS136A for digital control channels. The interference-based dynamic channel assignment of the present invention is based on the PCS network, SWAN at Bell Laboratories.
It is also suitable for indoor wireless communication networks, including the Mobile Network Computer Environment (Seamless Wireless ATM Networking) or other similar networks.

[0056]

As described above, the dynamic channel assignment method of the present invention assigns a priority to a channel list and assigns a priority to a selected subset of the priority-assigned channel list. The priority is a dynamic channel allocation method for a plurality of channels, which is distributed on a per-cell / sector basis and the priority assignment is performed independently of frequency usage information from other cells / sectors. This method allows for interference-based dynamic channel assignment for wireless communication networks. In this way, a dynamic channel assignment for a wireless network can be provided, in particular a dynamic channel assignment method with complete automation and easy system growth and high capacity.

[Brief description of the drawings]

FIG. 1 is a block diagram of a wireless network using the present invention.

FIG. 2 is a diagram showing a cell / sector channel list.

FIG. 3 is a flowchart of long-term channel assignment;

FIG. 4 is a flowchart of short-term channel assignment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Mobile telephone switching office (MTSO) 12 Switching wired network 14 Base station 16 Antenna 18 Cell 20 Mobile communication device 22 Transceiver port

Continuation of the front page (73) Patent holder 596077259 600 Mountain Avenue, Murray Hill, New Jersey 07974-0636 U.S.A. S. A. (72) Inventor Simon C. Bostte United States, 70060 New Jersey, North Plainfield, North Drive 375 (72) Inventor Lynel E. Cannel United States, 60563 Illinois, Naperville, Burning Tree Lane 628 (72) Inventor Terry Siphon Chen United States, 07869 New Jersey, Randolph, Sparrow Road 20 (72) Inventor Lindsay Chu United States, 07848 New Jersey, Lafayette Monroe Road 14 (72) Inventor Sadia A. Grandy United States, 07054 New Jersey, Parsippany, Parsippany Road 300 (72) Inventor Chinling E. United States, 07726 New Jersey, Manarapan, Taylor Lake Court 9 (72) Inventor Joseph Samuel Kauffman United States, 07733 New Jersey Chernutt Ridge Road, Holmdel, 13 (72) Inventor Boris Dmitrybig Lbachevsky United States, 08807 New Jersey, Bridgewater, Milltown Road 109 (72) Inventor Barakrishnan Narendrand United States, 07974 New Jersey, New Providence , Gales Drive 127, Apartment A7 (72) Inventor Donna M. Sandwich United States, 90148 Illinois, Lombard, Elizabeth Court 4 (56) References JP-A-9-102981 (JP, A) JP-A-7-236173 (JP, A) (58) Fields studied (Int. Cl. ⁷ , DB name) H04B ^7/ 24-7/26 102 H04Q ^7/ 00-7/38

Claims (42)

(57) [Claims] 1. A dynamic channel allocation method for a plurality of channels in a wireless communication network, comprising: (A) distribution on a cell and / or sector basis;
The step of giving priority to the channel list to be performed and the step of giving priority to the above (A) are performed in other cells and / or
Is performed independently of the frequency usage information from the sector.
Serial priority assigned as a function of long-term interference variations, (B) a step of applying priority to the selected subset of assigned channel list of the priority, a plurality of subsets is the selection (C) Channel
Dynamically allocating a plurality of channels. 2. The method according to claim 1, wherein the step (A) comprises :
The method of claim 1, wherein the method is performed on a channel basis selected from the group consisting of: 3. The method according to claim 1, wherein the step (B) comprises :
The method of claim 1, wherein the method is performed on a channel basis selected from the group consisting of: 4. The method of claim 1, wherein said function of long-term interference variation is a moving average. 5. The method of claim 4, wherein said moving average is a moving average of received signal strength. 6. The reception signal strength is equal to or less than a predetermined threshold value.
The method of claim 5, wherein the intensity is selected from the above sample . 7. The received signal strength is a weighted strength.
The method of claim 5, characterized in that that. 8. The method of claim 7, wherein the weights are adjusted to reduce the moving average when the interference is low and increase the moving average when the interference is high. 9. A dynamic channel allocation method for a plurality of channels in a wireless communication network, comprising: (A) distribution on a cell and / or sector basis;
Assigning a priority to the channel list, and the step (A) comprises the steps of:
Of performed independently of the frequency usage information, (B) a step of applying priority to the selected subset of assigned channel list of the priority, the (B) step, of short-term interference fluctuation Split as a function
Against being, said plurality of channels from the subset that is the selected (C)
Dynamic channel allocation method of a plurality of channels, comprising the step of assigning the Le dynamically. 10. The method of claim 9, wherein the function of the short-term interference variation is a function of a near instantaneous interference measure. 11. A dynamic channel allocation method for a plurality of channels in a wireless communication network, comprising: (A) distribution on a cell and / or sector basis;
Assigning a priority to the channel list, and the step (A) comprises the steps of:
Of the spectral information is performed independently, from (B) a step of applying priority to the selected subset of assigned channel list of the priority, the (A) step, a time-slot channel What
That performed by the channel base is selected from the group, (C) channel from said selected subset of said plurality
Dynamic channel allocation method of a plurality of channels, comprising the step of assigning the Le dynamically. 12. A dynamic channel allocation method for a plurality of channels in a wireless communication network, comprising: (A) distribution on a cell and / or sector basis;
Assigning a priority to the channel list, and the step (A) comprises the steps of:
Of the spectral information is performed independently, from (B) a step of applying priority to the selected subset of assigned channel list of the priority, the (B) step, a time-slot channel What
That performed by the channel base is selected from the group, (C) channel from said selected subset of said plurality
Dynamic channel allocation method of a plurality of channels, comprising the step of assigning the Le dynamically. 13. A dynamic channel allocation method for a plurality of channels in a wireless communication network, comprising: (A) distribution on a cell and / or sector basis;
Assigning a priority to the channel list, and the step (A) comprises the steps of:
Of the spectral information is done independently, (B) a step of applying priority to the selected subset of assigned channel list of the priority, the priority of a subset of said selected, the Channel
( C ) updating the plurality of channels from the selected subset.
Dynamic channel allocation method of a plurality of channels, comprising the step of assigning the Le dynamically. 14. A dynamic channel allocation method for a plurality of channels in a wireless communication network, comprising: (A) distribution on a cell and / or sector basis;
Assigning a priority to the channel list, and the step (A) comprises the steps of:
Of the spectral information is performed independently, (B) a step of applying priority to the selected subset of assigned channel list of the priority, the (B) step, the (A) Better than the steps
Ri frequently runs, (C) channel from said selected subset of said plurality
Dynamic channel allocation method of a plurality of channels, comprising the step of assigning the Le dynamically. 15. A method for dynamic channel allocation of a plurality of channels in a wireless communication network, comprising: (A) distribution on a cell and / or sector basis;
Assigning a priority to the channel list, and the step (A) comprises the steps of:
Of the spectral information is performed independently, (B) a step of applying priority to the selected subset of assigned channel list of the priority, in the (B) step, the priority is up Link special
( C ) assigning the plurality of channels from the selected subset.
Dynamic channel allocation method of a plurality of channels, comprising the step of assigning the Le dynamically. 16. A dynamic channel allocation method for a plurality of channels in a wireless communication network, comprising: (A) distribution on a cell and / or sector basis;
The step of giving priority to the channel list to be performed and the step of (A) are performed by another cell and / or sector.
The al frequency utilization information is performed independently, in step (B) a step of applying priority to the selected subset of assigned channel list of the priority, the (B), priority Is the uplink
( C ) assigning the plurality of channels from the selected subset.
Dynamic channel allocation method of a plurality of channels, comprising the step of assigning the Le dynamically. 17. A dynamic channel allocation method for a plurality of channels in a wireless communication network, comprising: (A) distribution on a cell and / or sector basis;
The step of giving priority to the channel list to be performed and the step of (A) are performed by another cell and / or sector.
Performed independently of the al for frequency usage information, at step (B) a step of applying priority to the selected subset of assigned channel list of the priority, the (A), the priority Is the downlink
( C ) assigning the plurality of channels from the selected subset.
Dynamic channel allocation method of a plurality of channels, comprising the step of assigning the Le dynamically. 18. A method for dynamic channel allocation of a plurality of channels in a wireless communication network, comprising: (A) distribution on a cell and / or sector basis;
Assigning a priority to the channel list, and the step (A) comprises the steps of:
Of the spectral information is performed independently, (B) a step of applying priority to the selected subset of assigned channel list of the priority, in the (B) step, the priority is down Link special
Assigned as a function of symptom, the plurality of channels from the subset that is the selected (C)
Dynamic channel allocation method of a plurality of channels, comprising the step of assigning the Le dynamically. 19. A method for dynamic channel allocation of a plurality of channels in a wireless communication network, comprising: (A) distribution on a cell and / or sector basis;
Assigning a priority to the channel list, and the step (A) comprises the steps of:
Of the spectral information is performed independently, (B) a step of applying priority to the selected subset of assigned channel list of priority, (C) available channels is predetermined minimum Greater than value
Dynamically assigning a call when having a CIR
Dynamic channel allocation method of a plurality of channels, characterized in that comprising a-up. 20. A dynamic channel allocation method for a plurality of channels in a wireless communication network, comprising: (A) distribution on a cell and / or sector basis;
Assigning a priority to the channel list, and the step (A) comprises the steps of:
Of the spectral information is performed independently, (B) a step of applying priority to the selected subset of assigned channel list of priority, (C) the priority assigned channel Selection of the list
From the selected subset, the channel with the highest CIR
Dynamic channel allocation method of a plurality of channels, comprising the step of assigning the Le dynamically. 21. A dynamic channel allocation method for a plurality of channels in a wireless communication network, comprising: (A) distribution on a cell and / or sector basis;
Assigning a priority to the channel list, and the step (A) comprises the steps of:
Of the spectral information is performed independently, (B) a step of applying priority to the selected subset of assigned channel list of priority, (C) the priority assigned channel Selection of the list
At least the lowest CIR threshold from the selected subset
Dynamically assign channels with high values.
Dynamic channel allocation method of a plurality of channels, characterized in that comprising a-up. 22. A dynamic channel allocation method for a plurality of channels in a wireless communication network, comprising: (A) an uplink distributed on a cell / sector basis;
The step of assigning a priority to the link and downlink channel lists and the step of (A) include the steps of:
It is performed independently of the number usage information, and in the step (A), the priority is long-term interference fluctuation.
Channel of the assigned as a function, (B) a step of applying priority to the selected subset of assigned channel list of the priority of the plurality of subsets is the selection (C)
Dynamic channel allocation method of a plurality of channels, comprising the step of assigning the Le dynamically. 23. The method of claim 22, wherein in step (B), priority is assigned as a function of short-term interference variation. 24. The method of claim 23, wherein the function of short-term interference variation is a function of a near instantaneous interference measure. 25. The step (A) comprises :
On a channel basis selected from the group consisting of
The method of claim 22, characterized in that that. 26. The step (A) comprises :
Channel base selected from the group consisting of
The method of claim 22, characterized in that it is performed in. 27. The step (B) comprises :
On a channel basis selected from the group consisting of
The method of claim 22, characterized in that that. 28. The step (B) comprises :
Channel base selected from the group consisting of
The method of claim 22, characterized in that it is performed in. 29. The method of claim 22, wherein said function of long-term interference variation is a moving average. 30. The method of claim 29, wherein said moving average is a moving average of received signal strength. 31. The reception signal strength is a predetermined threshold value.
The strength is selected from the above samples
31. The method of claim 30, wherein 32. The received signal strength is a weighted strength.
31. The method of claim 30, wherein: 33. The method of claim 32, wherein the weights are adjusted to reduce the moving average when the interference is low, and increase the moving average when the interference is high. 34. The method of claim 22, wherein the priority of the selected subset is updated more frequently than the priority of the channel list. 35. The step (B) comprises the step (A)
The method of claim 22, wherein the method is performed more frequently than the steps of: 36. In the step (A), priority is given to
The method of claim 22, wherein degrees are assigned as a function of uplink characteristics . 37. In the step (B), priority is given to
The method of claim 22, wherein degrees are assigned as a function of uplink characteristics . 38. In the step (A), priority is given to
23. The method of claim 22, wherein degrees are assigned as a function of downlink characteristics . 39. In the step (B), priority is given to
23. The method of claim 22, wherein degrees are assigned as a function of downlink characteristics . 40. The method of claim 22, further comprising the step of: ( D ) admitting the call when an available channel has a CIR greater than a predetermined minimum. 41. ( E ) The highest CI from the selected subset of the prioritized channel list
The method of claim 22, further comprising allocating a channel having R. 42. The method of claim 22, further comprising: ( F ) assigning a channel having at least a lowest CIR threshold from the selected subset of the prioritized channel list. Method.